./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_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/safe014_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/safe014_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe014_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 21:08:16,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:08:16,124 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:08:16,129 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:08:16,129 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:08:16,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:08:16,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:08:16,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:08:16,161 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:08:16,164 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:08:16,165 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:08:16,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:08:16,165 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:08:16,166 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:08:16,167 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:08:16,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:08:16,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:08:16,167 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:08:16,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:08:16,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:08:16,168 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:08:16,168 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:08:16,168 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:08:16,168 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:08:16,169 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:08:16,169 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:08:16,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:08:16,169 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:08:16,169 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:08:16,170 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:08:16,170 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:08:16,171 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:08:16,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:08:16,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:08:16,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:08:16,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:08:16,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:08:16,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:08:16,172 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:08:16,172 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:08:16,172 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:08:16,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:08:16,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:08:16,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:08:16,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:08:16,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:08:16,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:08:16,403 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:08:16,403 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:08:16,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-27 21:08:17,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:08:17,619 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:08:17,620 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-27 21:08:17,637 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d589a11/fb238e89a40646f8a3e1c044cf049553/FLAGdc89c275d [2024-06-27 21:08:17,650 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d589a11/fb238e89a40646f8a3e1c044cf049553 [2024-06-27 21:08:17,653 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:08:17,653 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:08:17,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe014_power.oepc.yml/witness.yml [2024-06-27 21:08:17,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:08:17,832 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:08:17,833 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:08:17,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:08:17,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:08:17,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:08:17" (1/2) ... [2024-06-27 21:08:17,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595a2a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:08:17, skipping insertion in model container [2024-06-27 21:08:17,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:08:17" (1/2) ... [2024-06-27 21:08:17,840 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d7caf9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:08:17, skipping insertion in model container [2024-06-27 21:08:17,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:08:17" (2/2) ... [2024-06-27 21:08:17,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595a2a0f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:08:17, skipping insertion in model container [2024-06-27 21:08:17,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:08:17" (2/2) ... [2024-06-27 21:08:17,842 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:08:17,936 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:08:17,938 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:08:17,938 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:08:17,938 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:08:17,938 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:08:17,938 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-27 21:08:17,975 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:08:18,267 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:08:18,275 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:08:18,415 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:08:18,456 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:08:18,456 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:08:18 WrapperNode [2024-06-27 21:08:18,456 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:08:18,457 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:08:18,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:08:18,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:08:18,462 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,485 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,518 INFO L138 Inliner]: procedures = 175, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2024-06-27 21:08:18,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:08:18,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:08:18,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:08:18,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:08:18,530 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,530 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,546 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,564 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 21:08:18,569 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,569 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,582 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,589 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,599 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,600 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:08:18,607 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:08:18,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:08:18,611 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:08:18,612 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 09:08:18" (1/1) ... [2024-06-27 21:08:18,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:08:18,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:08:18,637 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 21:08:18,644 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 21:08:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:08:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:08:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:08:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:08:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:08:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:08:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:08:18,672 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:08:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:08:18,673 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:08:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:08:18,673 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:08:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:08:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:08:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:08:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:08:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:08:18,675 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 21:08:18,777 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:08:18,779 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:08:19,140 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:08:19,141 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:08:19,399 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:08:19,399 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:08:19,400 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:08:19 BoogieIcfgContainer [2024-06-27 21:08:19,400 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:08:19,402 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:08:19,402 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:08:19,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:08:19,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:08:17" (1/4) ... [2024-06-27 21:08:19,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d795fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:08:19, skipping insertion in model container [2024-06-27 21:08:19,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:08:17" (2/4) ... [2024-06-27 21:08:19,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d795fa8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:08:19, skipping insertion in model container [2024-06-27 21:08:19,406 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 09:08:18" (3/4) ... [2024-06-27 21:08:19,406 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d795fa8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:08:19, skipping insertion in model container [2024-06-27 21:08:19,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:08:19" (4/4) ... [2024-06-27 21:08:19,407 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_power.oepc.i [2024-06-27 21:08:19,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:08:19,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:08:19,421 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:08:19,500 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:08:19,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:08:19,550 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 21:08:19,550 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:08:19,553 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 52 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 21:08:19,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:08:19,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 21:08:19,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:08:19,574 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;@65f223c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:08:19,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:08:19,581 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:08:19,582 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:08:19,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:08:19,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:19,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:08:19,583 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 21:08:19,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:19,590 INFO L85 PathProgramCache]: Analyzing trace with hash 652561103, now seen corresponding path program 1 times [2024-06-27 21:08:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:19,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070847072] [2024-06-27 21:08:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:21,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070847072] [2024-06-27 21:08:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070847072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:21,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:08:21,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548296117] [2024-06-27 21:08:21,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:21,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:08:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:08:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:08:21,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:08:21,350 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 21:08:21,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:21,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:08:21,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:21,732 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-27 21:08:21,733 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 21:08:21,738 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 5943 event pairs, 479 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-27 21:08:21,744 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 21:08:21,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-27 21:08:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:08:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:08:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-27 21:08:21,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-27 21:08:21,755 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-27 21:08:21,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-27 21:08:21,757 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 21:08:21,760 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 21:08:21,762 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 21:08:21,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 21:08:21,765 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 21:08:21,765 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 21:08:21,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:21,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:21,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:08:21,765 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 21:08:21,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 46193730, now seen corresponding path program 1 times [2024-06-27 21:08:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505591360] [2024-06-27 21:08:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505591360] [2024-06-27 21:08:23,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505591360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:23,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:23,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:08:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086279770] [2024-06-27 21:08:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:23,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:08:23,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:23,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:08:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:08:23,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:08:23,915 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 21:08:23,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:23,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:08:23,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:24,434 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-27 21:08:24,435 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-27 21:08:24,437 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 5879 event pairs, 369 based on Foata normal form. 6/1233 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-27 21:08:24,443 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 21:08:24,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-27 21:08:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:08:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:08:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-27 21:08:24,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 21:08:24,447 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-27 21:08:24,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-27 21:08:24,449 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 21:08:24,451 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 21:08:24,451 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 21:08:24,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 21:08:24,453 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 21:08:24,454 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 21:08:24,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:24,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:24,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:08:24,458 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 21:08:24,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1768743622, now seen corresponding path program 1 times [2024-06-27 21:08:24,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528373881] [2024-06-27 21:08:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:24,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:27,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:27,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528373881] [2024-06-27 21:08:27,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528373881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:27,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:27,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:08:27,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182353385] [2024-06-27 21:08:27,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:27,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:08:27,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:08:27,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:08:27,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 21:08:27,120 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 21:08:27,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:27,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 21:08:27,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:27,839 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-27 21:08:27,839 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-27 21:08:27,841 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 7149 event pairs, 305 based on Foata normal form. 12/1531 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-27 21:08:27,847 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-27 21:08:27,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-27 21:08:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 21:08:27,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 21:08:27,852 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-27 21:08:27,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-27 21:08:27,854 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 21:08:27,855 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 21:08:27,856 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 21:08:27,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 21:08:27,857 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 21:08:27,857 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 21:08:27,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:27,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:27,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:08:27,858 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 21:08:27,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1364988673, now seen corresponding path program 1 times [2024-06-27 21:08:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:27,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837660036] [2024-06-27 21:08:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:27,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:29,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:29,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837660036] [2024-06-27 21:08:29,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837660036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:29,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:29,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:08:29,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069643219] [2024-06-27 21:08:29,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:29,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:08:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:29,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:08:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:08:29,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:29,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:29,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:29,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:29,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:29,886 INFO L124 PetriNetUnfolderBase]: 1120/1739 cut-off events. [2024-06-27 21:08:29,886 INFO L125 PetriNetUnfolderBase]: For 1717/1717 co-relation queries the response was YES. [2024-06-27 21:08:29,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4888 conditions, 1739 events. 1120/1739 cut-off events. For 1717/1717 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8146 event pairs, 441 based on Foata normal form. 2/1737 useless extension candidates. Maximal degree in co-relation 4871. Up to 1665 conditions per place. [2024-06-27 21:08:29,895 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-27 21:08:29,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 386 flow [2024-06-27 21:08:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:08:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:08:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 21:08:29,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 21:08:29,897 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 92 transitions. [2024-06-27 21:08:29,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 386 flow [2024-06-27 21:08:29,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 355 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:29,899 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 228 flow [2024-06-27 21:08:29,900 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-06-27 21:08:29,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-27 21:08:29,900 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 228 flow [2024-06-27 21:08:29,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:29,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:29,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:29,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:08:29,901 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 21:08:29,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash 662761536, now seen corresponding path program 1 times [2024-06-27 21:08:29,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:29,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764803026] [2024-06-27 21:08:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:29,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:31,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:31,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764803026] [2024-06-27 21:08:31,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764803026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:31,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:31,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:08:31,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596937527] [2024-06-27 21:08:31,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:31,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:08:31,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:08:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:08:31,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:31,810 INFO L124 PetriNetUnfolderBase]: 1115/1737 cut-off events. [2024-06-27 21:08:31,810 INFO L125 PetriNetUnfolderBase]: For 2509/2512 co-relation queries the response was YES. [2024-06-27 21:08:31,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5388 conditions, 1737 events. 1115/1737 cut-off events. For 2509/2512 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8149 event pairs, 457 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 5368. Up to 1660 conditions per place. [2024-06-27 21:08:31,821 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 51 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-27 21:08:31,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 389 flow [2024-06-27 21:08:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:08:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:08:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:08:31,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:08:31,823 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 228 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:08:31,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 389 flow [2024-06-27 21:08:31,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 385 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 21:08:31,825 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 257 flow [2024-06-27 21:08:31,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 21:08:31,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 21:08:31,826 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 257 flow [2024-06-27 21:08:31,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:31,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:31,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:31,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:08:31,827 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 21:08:31,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1794745730, now seen corresponding path program 1 times [2024-06-27 21:08:31,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:31,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071222756] [2024-06-27 21:08:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071222756] [2024-06-27 21:08:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071222756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:33,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:33,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:08:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745380571] [2024-06-27 21:08:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:33,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:08:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:08:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:08:33,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:33,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 257 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 21:08:33,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:33,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:33,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:34,938 INFO L124 PetriNetUnfolderBase]: 1128/1755 cut-off events. [2024-06-27 21:08:34,938 INFO L125 PetriNetUnfolderBase]: For 3331/3331 co-relation queries the response was YES. [2024-06-27 21:08:34,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5648 conditions, 1755 events. 1128/1755 cut-off events. For 3331/3331 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8187 event pairs, 430 based on Foata normal form. 2/1752 useless extension candidates. Maximal degree in co-relation 5625. Up to 1609 conditions per place. [2024-06-27 21:08:34,947 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-27 21:08:34,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 537 flow [2024-06-27 21:08:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 21:08:34,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 21:08:34,948 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 257 flow. Second operand 6 states and 115 transitions. [2024-06-27 21:08:34,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 537 flow [2024-06-27 21:08:34,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 525 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 21:08:34,955 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 342 flow [2024-06-27 21:08:34,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-27 21:08:34,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-27 21:08:34,958 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 342 flow [2024-06-27 21:08:34,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:34,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:34,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:34,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:08:34,959 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 21:08:34,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash -930157280, now seen corresponding path program 2 times [2024-06-27 21:08:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724006852] [2024-06-27 21:08:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:36,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724006852] [2024-06-27 21:08:36,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724006852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:36,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:36,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:08:36,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559432308] [2024-06-27 21:08:36,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:36,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:08:36,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:36,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:08:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:08:36,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:36,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 342 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 21:08:36,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:36,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:36,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:37,761 INFO L124 PetriNetUnfolderBase]: 1123/1742 cut-off events. [2024-06-27 21:08:37,761 INFO L125 PetriNetUnfolderBase]: For 4968/4977 co-relation queries the response was YES. [2024-06-27 21:08:37,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 1742 events. 1123/1742 cut-off events. For 4968/4977 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8139 event pairs, 431 based on Foata normal form. 8/1742 useless extension candidates. Maximal degree in co-relation 6206. Up to 1606 conditions per place. [2024-06-27 21:08:37,770 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-27 21:08:37,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 594 flow [2024-06-27 21:08:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:08:37,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:08:37,772 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 342 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:08:37,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 594 flow [2024-06-27 21:08:37,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 572 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 21:08:37,779 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 390 flow [2024-06-27 21:08:37,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 21:08:37,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 21:08:37,780 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 390 flow [2024-06-27 21:08:37,780 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 21:08:37,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:37,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:37,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:08:37,780 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 21:08:37,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:37,781 INFO L85 PathProgramCache]: Analyzing trace with hash 575761285, now seen corresponding path program 1 times [2024-06-27 21:08:37,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:37,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232896635] [2024-06-27 21:08:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:37,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:40,259 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 21:08:40,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:40,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232896635] [2024-06-27 21:08:40,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232896635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:40,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:40,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:40,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231355783] [2024-06-27 21:08:40,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:40,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:40,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:40,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:40,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:40,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:40,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 390 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 21:08:40,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:40,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:40,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:41,334 INFO L124 PetriNetUnfolderBase]: 1227/1927 cut-off events. [2024-06-27 21:08:41,334 INFO L125 PetriNetUnfolderBase]: For 6305/6311 co-relation queries the response was YES. [2024-06-27 21:08:41,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7192 conditions, 1927 events. 1227/1927 cut-off events. For 6305/6311 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9289 event pairs, 378 based on Foata normal form. 9/1934 useless extension candidates. Maximal degree in co-relation 7164. Up to 1725 conditions per place. [2024-06-27 21:08:41,347 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 92 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-27 21:08:41,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 928 flow [2024-06-27 21:08:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:08:41,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:08:41,349 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 390 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:08:41,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 928 flow [2024-06-27 21:08:41,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 131 transitions, 895 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:41,356 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 603 flow [2024-06-27 21:08:41,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=603, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-27 21:08:41,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 21:08:41,359 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 603 flow [2024-06-27 21:08:41,359 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 21:08:41,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:41,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:41,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:08:41,359 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 21:08:41,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash 197339111, now seen corresponding path program 2 times [2024-06-27 21:08:41,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:41,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189913170] [2024-06-27 21:08:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:41,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189913170] [2024-06-27 21:08:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189913170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:43,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:43,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:43,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507110828] [2024-06-27 21:08:43,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:43,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:43,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:43,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:43,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 603 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 21:08:43,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:43,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:43,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:44,928 INFO L124 PetriNetUnfolderBase]: 1271/2002 cut-off events. [2024-06-27 21:08:44,928 INFO L125 PetriNetUnfolderBase]: For 9301/9309 co-relation queries the response was YES. [2024-06-27 21:08:44,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8372 conditions, 2002 events. 1271/2002 cut-off events. For 9301/9309 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9776 event pairs, 348 based on Foata normal form. 11/2011 useless extension candidates. Maximal degree in co-relation 8339. Up to 1749 conditions per place. [2024-06-27 21:08:44,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-27 21:08:44,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 1091 flow [2024-06-27 21:08:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:08:44,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:08:44,939 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 603 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:08:44,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 1091 flow [2024-06-27 21:08:44,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 1057 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 21:08:44,947 INFO L231 Difference]: Finished difference. Result has 82 places, 92 transitions, 760 flow [2024-06-27 21:08:44,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=760, PETRI_PLACES=82, PETRI_TRANSITIONS=92} [2024-06-27 21:08:44,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 21:08:44,947 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 92 transitions, 760 flow [2024-06-27 21:08:44,948 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 21:08:44,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:44,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:44,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:08:44,948 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 21:08:44,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2097499961, now seen corresponding path program 3 times [2024-06-27 21:08:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:44,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808782386] [2024-06-27 21:08:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:44,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:47,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808782386] [2024-06-27 21:08:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808782386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:47,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:47,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890754543] [2024-06-27 21:08:47,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:47,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:47,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:47,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:47,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 92 transitions, 760 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 21:08:47,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:47,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:47,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:48,717 INFO L124 PetriNetUnfolderBase]: 1284/2020 cut-off events. [2024-06-27 21:08:48,717 INFO L125 PetriNetUnfolderBase]: For 12800/12802 co-relation queries the response was YES. [2024-06-27 21:08:48,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9361 conditions, 2020 events. 1284/2020 cut-off events. For 12800/12802 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9727 event pairs, 399 based on Foata normal form. 2/2016 useless extension candidates. Maximal degree in co-relation 9325. Up to 1680 conditions per place. [2024-06-27 21:08:48,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-27 21:08:48,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 142 transitions, 1369 flow [2024-06-27 21:08:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:08:48,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:08:48,730 INFO L175 Difference]: Start difference. First operand has 82 places, 92 transitions, 760 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:08:48,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 142 transitions, 1369 flow [2024-06-27 21:08:48,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 142 transitions, 1282 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:48,742 INFO L231 Difference]: Finished difference. Result has 87 places, 112 transitions, 1047 flow [2024-06-27 21:08:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1047, PETRI_PLACES=87, PETRI_TRANSITIONS=112} [2024-06-27 21:08:48,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 21:08:48,743 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 112 transitions, 1047 flow [2024-06-27 21:08:48,743 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 21:08:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:48,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:48,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:08:48,744 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 21:08:48,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2097500147, now seen corresponding path program 1 times [2024-06-27 21:08:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:48,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100435104] [2024-06-27 21:08:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:48,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:50,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100435104] [2024-06-27 21:08:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100435104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:50,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:50,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:08:50,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682086270] [2024-06-27 21:08:50,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:50,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:08:50,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:50,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:08:50,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:08:50,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:50,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 1047 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:50,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:50,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:50,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:51,743 INFO L124 PetriNetUnfolderBase]: 1297/2042 cut-off events. [2024-06-27 21:08:51,743 INFO L125 PetriNetUnfolderBase]: For 15275/15283 co-relation queries the response was YES. [2024-06-27 21:08:51,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10139 conditions, 2042 events. 1297/2042 cut-off events. For 15275/15283 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9875 event pairs, 386 based on Foata normal form. 10/2047 useless extension candidates. Maximal degree in co-relation 10099. Up to 1842 conditions per place. [2024-06-27 21:08:51,757 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 113 selfloop transitions, 23 changer transitions 0/141 dead transitions. [2024-06-27 21:08:51,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 141 transitions, 1463 flow [2024-06-27 21:08:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 21:08:51,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 21:08:51,759 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 1047 flow. Second operand 6 states and 115 transitions. [2024-06-27 21:08:51,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 141 transitions, 1463 flow [2024-06-27 21:08:51,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 141 transitions, 1415 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 21:08:51,775 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 1080 flow [2024-06-27 21:08:51,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1080, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-27 21:08:51,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 21:08:51,776 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 1080 flow [2024-06-27 21:08:51,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:51,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:51,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:51,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:08:51,776 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 21:08:51,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1229897255, now seen corresponding path program 4 times [2024-06-27 21:08:51,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:51,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455865696] [2024-06-27 21:08:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:51,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:53,904 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 21:08:53,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:53,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455865696] [2024-06-27 21:08:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455865696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:53,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:53,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:08:53,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761590299] [2024-06-27 21:08:53,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:53,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:08:53,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:53,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:08:53,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:08:53,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:53,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 1080 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 21:08:53,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:53,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:55,051 INFO L124 PetriNetUnfolderBase]: 1292/2019 cut-off events. [2024-06-27 21:08:55,052 INFO L125 PetriNetUnfolderBase]: For 16436/16447 co-relation queries the response was YES. [2024-06-27 21:08:55,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 2019 events. 1292/2019 cut-off events. For 16436/16447 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9624 event pairs, 420 based on Foata normal form. 4/2003 useless extension candidates. Maximal degree in co-relation 10081. Up to 1685 conditions per place. [2024-06-27 21:08:55,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 47 changer transitions 0/144 dead transitions. [2024-06-27 21:08:55,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 144 transitions, 1510 flow [2024-06-27 21:08:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:08:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 21:08:55,068 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 1080 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:08:55,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 144 transitions, 1510 flow [2024-06-27 21:08:55,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1481 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:55,084 INFO L231 Difference]: Finished difference. Result has 95 places, 118 transitions, 1191 flow [2024-06-27 21:08:55,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=95, PETRI_TRANSITIONS=118} [2024-06-27 21:08:55,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 21:08:55,085 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 118 transitions, 1191 flow [2024-06-27 21:08:55,085 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 21:08:55,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:55,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:55,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:08:55,086 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 21:08:55,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1259425871, now seen corresponding path program 2 times [2024-06-27 21:08:55,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:55,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157607551] [2024-06-27 21:08:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:55,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:56,938 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 21:08:56,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157607551] [2024-06-27 21:08:56,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157607551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:56,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:56,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:08:56,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576544285] [2024-06-27 21:08:56,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:56,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:08:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:08:56,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:08:56,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:56,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 118 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:56,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:56,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:56,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:57,883 INFO L124 PetriNetUnfolderBase]: 1287/2035 cut-off events. [2024-06-27 21:08:57,883 INFO L125 PetriNetUnfolderBase]: For 19167/19213 co-relation queries the response was YES. [2024-06-27 21:08:57,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10512 conditions, 2035 events. 1287/2035 cut-off events. For 19167/19213 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9923 event pairs, 398 based on Foata normal form. 34/2060 useless extension candidates. Maximal degree in co-relation 10469. Up to 1830 conditions per place. [2024-06-27 21:08:57,895 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 112 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-06-27 21:08:57,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 1539 flow [2024-06-27 21:08:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 21:08:57,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:08:57,897 INFO L175 Difference]: Start difference. First operand has 95 places, 118 transitions, 1191 flow. Second operand 6 states and 108 transitions. [2024-06-27 21:08:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 1539 flow [2024-06-27 21:08:57,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 1457 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:57,913 INFO L231 Difference]: Finished difference. Result has 97 places, 119 transitions, 1175 flow [2024-06-27 21:08:57,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1175, PETRI_PLACES=97, PETRI_TRANSITIONS=119} [2024-06-27 21:08:57,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 21:08:57,913 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 119 transitions, 1175 flow [2024-06-27 21:08:57,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:57,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:57,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:57,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:08:57,914 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 21:08:57,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1230143519, now seen corresponding path program 1 times [2024-06-27 21:08:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:57,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013927828] [2024-06-27 21:08:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013927828] [2024-06-27 21:08:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013927828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:59,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:08:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217804317] [2024-06-27 21:08:59,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:08:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:08:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:08:59,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:59,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 119 transitions, 1175 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:59,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:59,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:59,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:00,211 INFO L124 PetriNetUnfolderBase]: 1279/2014 cut-off events. [2024-06-27 21:09:00,211 INFO L125 PetriNetUnfolderBase]: For 20492/20500 co-relation queries the response was YES. [2024-06-27 21:09:00,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10426 conditions, 2014 events. 1279/2014 cut-off events. For 20492/20500 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9702 event pairs, 380 based on Foata normal form. 8/2019 useless extension candidates. Maximal degree in co-relation 10381. Up to 1878 conditions per place. [2024-06-27 21:09:00,222 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 124 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2024-06-27 21:09:00,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 1523 flow [2024-06-27 21:09:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:09:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:09:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:09:00,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:09:00,224 INFO L175 Difference]: Start difference. First operand has 97 places, 119 transitions, 1175 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:09:00,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 1523 flow [2024-06-27 21:09:00,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 141 transitions, 1492 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:00,241 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1199 flow [2024-06-27 21:09:00,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1199, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-27 21:09:00,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-27 21:09:00,241 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1199 flow [2024-06-27 21:09:00,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:00,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:00,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:09:00,242 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 21:09:00,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -265213426, now seen corresponding path program 1 times [2024-06-27 21:09:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330151932] [2024-06-27 21:09:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:02,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:02,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330151932] [2024-06-27 21:09:02,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330151932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:02,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:02,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122521308] [2024-06-27 21:09:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:02,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:02,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:02,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1199 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:02,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:02,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:02,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:03,863 INFO L124 PetriNetUnfolderBase]: 1263/1994 cut-off events. [2024-06-27 21:09:03,864 INFO L125 PetriNetUnfolderBase]: For 22042/22050 co-relation queries the response was YES. [2024-06-27 21:09:03,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10443 conditions, 1994 events. 1263/1994 cut-off events. For 22042/22050 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9605 event pairs, 371 based on Foata normal form. 14/2006 useless extension candidates. Maximal degree in co-relation 10396. Up to 1745 conditions per place. [2024-06-27 21:09:03,875 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 98 selfloop transitions, 56 changer transitions 0/159 dead transitions. [2024-06-27 21:09:03,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1631 flow [2024-06-27 21:09:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:09:03,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:09:03,877 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1199 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:09:03,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1631 flow [2024-06-27 21:09:03,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1572 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:03,896 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 1272 flow [2024-06-27 21:09:03,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1272, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2024-06-27 21:09:03,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 21:09:03,897 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 1272 flow [2024-06-27 21:09:03,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:03,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:03,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:03,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:09:03,897 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 21:09:03,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1582497154, now seen corresponding path program 2 times [2024-06-27 21:09:03,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:03,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949105090] [2024-06-27 21:09:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:03,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:06,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949105090] [2024-06-27 21:09:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949105090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:06,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:06,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:06,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739304775] [2024-06-27 21:09:06,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:06,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:06,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:06,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:06,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:06,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 1272 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 21:09:06,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:06,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:06,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:08,074 INFO L124 PetriNetUnfolderBase]: 1276/2014 cut-off events. [2024-06-27 21:09:08,074 INFO L125 PetriNetUnfolderBase]: For 24540/24542 co-relation queries the response was YES. [2024-06-27 21:09:08,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10810 conditions, 2014 events. 1276/2014 cut-off events. For 24540/24542 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9725 event pairs, 388 based on Foata normal form. 2/2010 useless extension candidates. Maximal degree in co-relation 10762. Up to 1666 conditions per place. [2024-06-27 21:09:08,085 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 104 selfloop transitions, 49 changer transitions 0/158 dead transitions. [2024-06-27 21:09:08,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 158 transitions, 1766 flow [2024-06-27 21:09:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:09:08,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 21:09:08,087 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 1272 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:09:08,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 158 transitions, 1766 flow [2024-06-27 21:09:08,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 158 transitions, 1638 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:08,105 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1288 flow [2024-06-27 21:09:08,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1288, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-27 21:09:08,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-27 21:09:08,105 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1288 flow [2024-06-27 21:09:08,106 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 21:09:08,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:08,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:08,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:09:08,106 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 21:09:08,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash 597996980, now seen corresponding path program 3 times [2024-06-27 21:09:08,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:08,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335411788] [2024-06-27 21:09:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:08,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:10,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:10,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335411788] [2024-06-27 21:09:10,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335411788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:10,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:10,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175063788] [2024-06-27 21:09:10,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:10,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:10,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:10,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:10,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:10,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1288 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:10,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:10,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:10,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:11,685 INFO L124 PetriNetUnfolderBase]: 1307/2074 cut-off events. [2024-06-27 21:09:11,685 INFO L125 PetriNetUnfolderBase]: For 25002/25004 co-relation queries the response was YES. [2024-06-27 21:09:11,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11031 conditions, 2074 events. 1307/2074 cut-off events. For 25002/25004 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10174 event pairs, 388 based on Foata normal form. 2/2071 useless extension candidates. Maximal degree in co-relation 10982. Up to 1699 conditions per place. [2024-06-27 21:09:11,695 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 104 selfloop transitions, 52 changer transitions 0/161 dead transitions. [2024-06-27 21:09:11,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1880 flow [2024-06-27 21:09:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:09:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 21:09:11,697 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1288 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:09:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1880 flow [2024-06-27 21:09:11,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1756 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:11,718 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1352 flow [2024-06-27 21:09:11,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1352, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-06-27 21:09:11,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 21:09:11,718 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1352 flow [2024-06-27 21:09:11,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:11,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:11,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:11,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:09:11,719 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 21:09:11,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:11,719 INFO L85 PathProgramCache]: Analyzing trace with hash -527888710, now seen corresponding path program 4 times [2024-06-27 21:09:11,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:11,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91435581] [2024-06-27 21:09:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:11,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:14,363 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 21:09:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:14,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91435581] [2024-06-27 21:09:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91435581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:14,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:14,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44333239] [2024-06-27 21:09:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:14,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:14,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:14,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:14,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1352 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 21:09:14,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:14,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:15,813 INFO L124 PetriNetUnfolderBase]: 1302/2047 cut-off events. [2024-06-27 21:09:15,814 INFO L125 PetriNetUnfolderBase]: For 27270/27281 co-relation queries the response was YES. [2024-06-27 21:09:15,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11054 conditions, 2047 events. 1302/2047 cut-off events. For 27270/27281 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9846 event pairs, 427 based on Foata normal form. 4/2029 useless extension candidates. Maximal degree in co-relation 11004. Up to 1694 conditions per place. [2024-06-27 21:09:15,825 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 99 selfloop transitions, 57 changer transitions 0/161 dead transitions. [2024-06-27 21:09:15,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1814 flow [2024-06-27 21:09:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:09:15,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:09:15,828 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1352 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:09:15,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1814 flow [2024-06-27 21:09:15,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1741 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:15,854 INFO L231 Difference]: Finished difference. Result has 111 places, 130 transitions, 1401 flow [2024-06-27 21:09:15,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1401, PETRI_PLACES=111, PETRI_TRANSITIONS=130} [2024-06-27 21:09:15,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-27 21:09:15,854 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 130 transitions, 1401 flow [2024-06-27 21:09:15,855 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 21:09:15,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:15,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:09:15,855 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 21:09:15,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:15,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1625995334, now seen corresponding path program 5 times [2024-06-27 21:09:15,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729417529] [2024-06-27 21:09:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:17,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729417529] [2024-06-27 21:09:17,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729417529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:17,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:17,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:17,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633417962] [2024-06-27 21:09:17,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:17,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:17,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:17,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:17,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:18,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:18,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 130 transitions, 1401 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:18,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:18,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:18,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:19,132 INFO L124 PetriNetUnfolderBase]: 1297/2060 cut-off events. [2024-06-27 21:09:19,132 INFO L125 PetriNetUnfolderBase]: For 30503/30539 co-relation queries the response was YES. [2024-06-27 21:09:19,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11199 conditions, 2060 events. 1297/2060 cut-off events. For 30503/30539 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10050 event pairs, 422 based on Foata normal form. 15/2058 useless extension candidates. Maximal degree in co-relation 11148. Up to 1689 conditions per place. [2024-06-27 21:09:19,144 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 52 changer transitions 0/155 dead transitions. [2024-06-27 21:09:19,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 155 transitions, 1782 flow [2024-06-27 21:09:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:09:19,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:09:19,145 INFO L175 Difference]: Start difference. First operand has 111 places, 130 transitions, 1401 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:09:19,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 155 transitions, 1782 flow [2024-06-27 21:09:19,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1652 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:19,171 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 1396 flow [2024-06-27 21:09:19,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-06-27 21:09:19,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 21:09:19,171 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 1396 flow [2024-06-27 21:09:19,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:19,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:19,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:19,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:09:19,171 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 21:09:19,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash -545327656, now seen corresponding path program 1 times [2024-06-27 21:09:19,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:19,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016573028] [2024-06-27 21:09:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:19,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016573028] [2024-06-27 21:09:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016573028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:22,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:22,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497215691] [2024-06-27 21:09:22,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:22,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:22,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 1396 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 21:09:22,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:22,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:22,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:23,381 INFO L124 PetriNetUnfolderBase]: 1516/2415 cut-off events. [2024-06-27 21:09:23,381 INFO L125 PetriNetUnfolderBase]: For 38333/38341 co-relation queries the response was YES. [2024-06-27 21:09:23,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13302 conditions, 2415 events. 1516/2415 cut-off events. For 38333/38341 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12365 event pairs, 278 based on Foata normal form. 14/2427 useless extension candidates. Maximal degree in co-relation 13250. Up to 1747 conditions per place. [2024-06-27 21:09:23,395 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-27 21:09:23,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 188 transitions, 2070 flow [2024-06-27 21:09:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 21:09:23,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 21:09:23,397 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 1396 flow. Second operand 9 states and 174 transitions. [2024-06-27 21:09:23,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 188 transitions, 2070 flow [2024-06-27 21:09:23,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 188 transitions, 1987 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:23,426 INFO L231 Difference]: Finished difference. Result has 118 places, 138 transitions, 1542 flow [2024-06-27 21:09:23,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1542, PETRI_PLACES=118, PETRI_TRANSITIONS=138} [2024-06-27 21:09:23,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 21:09:23,427 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 138 transitions, 1542 flow [2024-06-27 21:09:23,427 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 21:09:23,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:23,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:09:23,427 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 21:09:23,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1611485788, now seen corresponding path program 2 times [2024-06-27 21:09:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:23,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169407929] [2024-06-27 21:09:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:26,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169407929] [2024-06-27 21:09:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169407929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:26,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:26,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:26,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781345009] [2024-06-27 21:09:26,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:26,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:26,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:26,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:26,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:26,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 138 transitions, 1542 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 21:09:26,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:26,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:26,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:27,498 INFO L124 PetriNetUnfolderBase]: 1503/2396 cut-off events. [2024-06-27 21:09:27,499 INFO L125 PetriNetUnfolderBase]: For 42233/42241 co-relation queries the response was YES. [2024-06-27 21:09:27,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13628 conditions, 2396 events. 1503/2396 cut-off events. For 42233/42241 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12280 event pairs, 375 based on Foata normal form. 14/2408 useless extension candidates. Maximal degree in co-relation 13573. Up to 2089 conditions per place. [2024-06-27 21:09:27,513 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 59 changer transitions 0/184 dead transitions. [2024-06-27 21:09:27,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 184 transitions, 2072 flow [2024-06-27 21:09:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:09:27,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:09:27,514 INFO L175 Difference]: Start difference. First operand has 118 places, 138 transitions, 1542 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:09:27,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 184 transitions, 2072 flow [2024-06-27 21:09:27,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 184 transitions, 1967 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:27,552 INFO L231 Difference]: Finished difference. Result has 122 places, 141 transitions, 1618 flow [2024-06-27 21:09:27,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1618, PETRI_PLACES=122, PETRI_TRANSITIONS=141} [2024-06-27 21:09:27,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 21:09:27,552 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 141 transitions, 1618 flow [2024-06-27 21:09:27,553 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 21:09:27,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:27,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:27,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:09:27,553 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 21:09:27,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:27,553 INFO L85 PathProgramCache]: Analyzing trace with hash 483606676, now seen corresponding path program 3 times [2024-06-27 21:09:27,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:27,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826865602] [2024-06-27 21:09:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:27,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:30,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:30,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826865602] [2024-06-27 21:09:30,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826865602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:30,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:30,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:30,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019922419] [2024-06-27 21:09:30,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:30,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:30,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:30,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:30,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 141 transitions, 1618 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 21:09:30,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:30,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:30,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:31,757 INFO L124 PetriNetUnfolderBase]: 1523/2423 cut-off events. [2024-06-27 21:09:31,757 INFO L125 PetriNetUnfolderBase]: For 46743/46745 co-relation queries the response was YES. [2024-06-27 21:09:31,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14126 conditions, 2423 events. 1523/2423 cut-off events. For 46743/46745 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12410 event pairs, 392 based on Foata normal form. 4/2421 useless extension candidates. Maximal degree in co-relation 14069. Up to 2029 conditions per place. [2024-06-27 21:09:31,772 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 58 changer transitions 0/176 dead transitions. [2024-06-27 21:09:31,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 2086 flow [2024-06-27 21:09:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:09:31,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:09:31,773 INFO L175 Difference]: Start difference. First operand has 122 places, 141 transitions, 1618 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:09:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 2086 flow [2024-06-27 21:09:31,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 176 transitions, 1945 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:31,816 INFO L231 Difference]: Finished difference. Result has 123 places, 143 transitions, 1638 flow [2024-06-27 21:09:31,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1638, PETRI_PLACES=123, PETRI_TRANSITIONS=143} [2024-06-27 21:09:31,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 21:09:31,816 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 143 transitions, 1638 flow [2024-06-27 21:09:31,817 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 21:09:31,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:31,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:31,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:09:31,817 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 21:09:31,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash 779861154, now seen corresponding path program 1 times [2024-06-27 21:09:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:31,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644146476] [2024-06-27 21:09:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644146476] [2024-06-27 21:09:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644146476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:34,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:34,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:34,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938701849] [2024-06-27 21:09:34,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:34,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:34,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:34,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:34,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:34,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 143 transitions, 1638 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:34,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:34,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:34,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:35,375 INFO L124 PetriNetUnfolderBase]: 1543/2460 cut-off events. [2024-06-27 21:09:35,375 INFO L125 PetriNetUnfolderBase]: For 50919/50927 co-relation queries the response was YES. [2024-06-27 21:09:35,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14493 conditions, 2460 events. 1543/2460 cut-off events. For 50919/50927 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12660 event pairs, 379 based on Foata normal form. 12/2467 useless extension candidates. Maximal degree in co-relation 14435. Up to 2218 conditions per place. [2024-06-27 21:09:35,389 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 26 changer transitions 0/175 dead transitions. [2024-06-27 21:09:35,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 2092 flow [2024-06-27 21:09:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:09:35,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 21:09:35,391 INFO L175 Difference]: Start difference. First operand has 123 places, 143 transitions, 1638 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:09:35,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 2092 flow [2024-06-27 21:09:35,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 175 transitions, 1949 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:35,427 INFO L231 Difference]: Finished difference. Result has 124 places, 145 transitions, 1582 flow [2024-06-27 21:09:35,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1582, PETRI_PLACES=124, PETRI_TRANSITIONS=145} [2024-06-27 21:09:35,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-27 21:09:35,427 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 145 transitions, 1582 flow [2024-06-27 21:09:35,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:35,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:35,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:35,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:09:35,428 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 21:09:35,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash 815316294, now seen corresponding path program 4 times [2024-06-27 21:09:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:35,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398173402] [2024-06-27 21:09:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:35,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:38,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398173402] [2024-06-27 21:09:38,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398173402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:38,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:38,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248223178] [2024-06-27 21:09:38,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:38,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:38,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:38,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:38,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 145 transitions, 1582 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 21:09:38,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:38,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:38,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:39,390 INFO L124 PetriNetUnfolderBase]: 1535/2422 cut-off events. [2024-06-27 21:09:39,390 INFO L125 PetriNetUnfolderBase]: For 53679/53690 co-relation queries the response was YES. [2024-06-27 21:09:39,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14338 conditions, 2422 events. 1535/2422 cut-off events. For 53679/53690 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12214 event pairs, 432 based on Foata normal form. 6/2404 useless extension candidates. Maximal degree in co-relation 14279. Up to 2049 conditions per place. [2024-06-27 21:09:39,405 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 60 changer transitions 0/177 dead transitions. [2024-06-27 21:09:39,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 177 transitions, 2050 flow [2024-06-27 21:09:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:09:39,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 21:09:39,407 INFO L175 Difference]: Start difference. First operand has 124 places, 145 transitions, 1582 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:09:39,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 177 transitions, 2050 flow [2024-06-27 21:09:39,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 1981 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:39,448 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1684 flow [2024-06-27 21:09:39,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1684, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-27 21:09:39,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 21:09:39,448 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1684 flow [2024-06-27 21:09:39,448 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 21:09:39,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:39,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:09:39,449 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 21:09:39,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1537383970, now seen corresponding path program 2 times [2024-06-27 21:09:39,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:39,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759210770] [2024-06-27 21:09:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:39,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759210770] [2024-06-27 21:09:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759210770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:41,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:41,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102504023] [2024-06-27 21:09:41,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:41,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:41,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1684 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:41,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:41,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:41,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:42,801 INFO L124 PetriNetUnfolderBase]: 1555/2485 cut-off events. [2024-06-27 21:09:42,801 INFO L125 PetriNetUnfolderBase]: For 59001/59047 co-relation queries the response was YES. [2024-06-27 21:09:42,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14913 conditions, 2485 events. 1555/2485 cut-off events. For 59001/59047 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12873 event pairs, 397 based on Foata normal form. 36/2512 useless extension candidates. Maximal degree in co-relation 14853. Up to 2238 conditions per place. [2024-06-27 21:09:42,817 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 146 selfloop transitions, 25 changer transitions 0/176 dead transitions. [2024-06-27 21:09:42,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 176 transitions, 2138 flow [2024-06-27 21:09:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:09:42,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 21:09:42,818 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1684 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:09:42,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 176 transitions, 2138 flow [2024-06-27 21:09:42,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 176 transitions, 1985 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:42,871 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1622 flow [2024-06-27 21:09:42,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1622, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-27 21:09:42,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 21:09:42,872 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1622 flow [2024-06-27 21:09:42,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:42,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:42,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:09:42,873 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 21:09:42,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:42,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1051973022, now seen corresponding path program 3 times [2024-06-27 21:09:42,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:42,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056092428] [2024-06-27 21:09:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:44,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:44,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056092428] [2024-06-27 21:09:44,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056092428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:44,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:44,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:44,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396973044] [2024-06-27 21:09:44,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:44,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:44,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:44,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:44,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:44,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:44,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1622 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:44,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:44,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:44,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:46,024 INFO L124 PetriNetUnfolderBase]: 1547/2473 cut-off events. [2024-06-27 21:09:46,024 INFO L125 PetriNetUnfolderBase]: For 60763/60809 co-relation queries the response was YES. [2024-06-27 21:09:46,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14744 conditions, 2473 events. 1547/2473 cut-off events. For 60763/60809 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12823 event pairs, 359 based on Foata normal form. 36/2500 useless extension candidates. Maximal degree in co-relation 14683. Up to 2154 conditions per place. [2024-06-27 21:09:46,041 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2024-06-27 21:09:46,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2088 flow [2024-06-27 21:09:46,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:09:46,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 21:09:46,042 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1622 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:09:46,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2088 flow [2024-06-27 21:09:46,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 2015 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:46,092 INFO L231 Difference]: Finished difference. Result has 130 places, 151 transitions, 1654 flow [2024-06-27 21:09:46,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1654, PETRI_PLACES=130, PETRI_TRANSITIONS=151} [2024-06-27 21:09:46,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 21:09:46,093 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 151 transitions, 1654 flow [2024-06-27 21:09:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:46,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:46,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:46,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:09:46,094 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:46,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2090890296, now seen corresponding path program 1 times [2024-06-27 21:09:46,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:46,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400142960] [2024-06-27 21:09:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:46,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:47,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400142960] [2024-06-27 21:09:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400142960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:47,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:47,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:09:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565098757] [2024-06-27 21:09:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:47,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:09:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:09:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:09:47,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:09:47,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 151 transitions, 1654 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 21:09:47,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:47,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:09:47,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:48,354 INFO L124 PetriNetUnfolderBase]: 1440/2347 cut-off events. [2024-06-27 21:09:48,354 INFO L125 PetriNetUnfolderBase]: For 62617/62633 co-relation queries the response was YES. [2024-06-27 21:09:48,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14237 conditions, 2347 events. 1440/2347 cut-off events. For 62617/62633 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12409 event pairs, 384 based on Foata normal form. 16/2359 useless extension candidates. Maximal degree in co-relation 14175. Up to 2147 conditions per place. [2024-06-27 21:09:48,368 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 138 selfloop transitions, 10 changer transitions 0/165 dead transitions. [2024-06-27 21:09:48,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 165 transitions, 1998 flow [2024-06-27 21:09:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:09:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:09:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:09:48,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:09:48,369 INFO L175 Difference]: Start difference. First operand has 130 places, 151 transitions, 1654 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:09:48,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 165 transitions, 1998 flow [2024-06-27 21:09:48,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 165 transitions, 1911 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:48,412 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 1617 flow [2024-06-27 21:09:48,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1617, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-06-27 21:09:48,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 21:09:48,412 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 1617 flow [2024-06-27 21:09:48,412 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 21:09:48,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:48,412 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 21:09:48,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:09:48,413 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 21:09:48,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash -967456325, now seen corresponding path program 1 times [2024-06-27 21:09:48,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:48,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900874711] [2024-06-27 21:09:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:51,361 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 21:09:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:51,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900874711] [2024-06-27 21:09:51,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900874711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:51,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:51,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095868791] [2024-06-27 21:09:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:51,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:51,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:51,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 1617 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:51,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:51,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:51,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:52,648 INFO L124 PetriNetUnfolderBase]: 1609/2576 cut-off events. [2024-06-27 21:09:52,649 INFO L125 PetriNetUnfolderBase]: For 71905/71913 co-relation queries the response was YES. [2024-06-27 21:09:52,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15525 conditions, 2576 events. 1609/2576 cut-off events. For 71905/71913 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13338 event pairs, 273 based on Foata normal form. 26/2600 useless extension candidates. Maximal degree in co-relation 15462. Up to 1831 conditions per place. [2024-06-27 21:09:52,666 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 139 selfloop transitions, 63 changer transitions 0/207 dead transitions. [2024-06-27 21:09:52,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2317 flow [2024-06-27 21:09:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:09:52,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:09:52,667 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 1617 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:09:52,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2317 flow [2024-06-27 21:09:52,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 207 transitions, 2289 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:52,712 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1753 flow [2024-06-27 21:09:52,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1753, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2024-06-27 21:09:52,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 21:09:52,712 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1753 flow [2024-06-27 21:09:52,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:52,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:52,713 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 21:09:52,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:09:52,713 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 21:09:52,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1738211871, now seen corresponding path program 2 times [2024-06-27 21:09:52,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:52,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979371569] [2024-06-27 21:09:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:52,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979371569] [2024-06-27 21:09:55,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979371569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:55,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:55,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:55,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395137722] [2024-06-27 21:09:55,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:55,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:55,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:55,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:55,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:55,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1753 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:55,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:55,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:55,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:56,673 INFO L124 PetriNetUnfolderBase]: 1563/2506 cut-off events. [2024-06-27 21:09:56,673 INFO L125 PetriNetUnfolderBase]: For 70334/70342 co-relation queries the response was YES. [2024-06-27 21:09:56,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15022 conditions, 2506 events. 1563/2506 cut-off events. For 70334/70342 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12945 event pairs, 355 based on Foata normal form. 32/2536 useless extension candidates. Maximal degree in co-relation 14958. Up to 2075 conditions per place. [2024-06-27 21:09:56,688 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 140 selfloop transitions, 58 changer transitions 0/203 dead transitions. [2024-06-27 21:09:56,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 203 transitions, 2312 flow [2024-06-27 21:09:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:09:56,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 21:09:56,690 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1753 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:09:56,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 203 transitions, 2312 flow [2024-06-27 21:09:56,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 203 transitions, 2188 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:56,750 INFO L231 Difference]: Finished difference. Result has 139 places, 157 transitions, 1778 flow [2024-06-27 21:09:56,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1778, PETRI_PLACES=139, PETRI_TRANSITIONS=157} [2024-06-27 21:09:56,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 21:09:56,751 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 157 transitions, 1778 flow [2024-06-27 21:09:56,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:56,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:56,751 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 21:09:56,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:09:56,751 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:56,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash -850459245, now seen corresponding path program 3 times [2024-06-27 21:09:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:56,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873434239] [2024-06-27 21:09:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:56,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:59,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873434239] [2024-06-27 21:09:59,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873434239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:59,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:59,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:59,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220346475] [2024-06-27 21:09:59,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:59,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:59,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:59,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:59,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 157 transitions, 1778 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:59,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:59,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:59,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:00,942 INFO L124 PetriNetUnfolderBase]: 1631/2632 cut-off events. [2024-06-27 21:10:00,942 INFO L125 PetriNetUnfolderBase]: For 72945/72947 co-relation queries the response was YES. [2024-06-27 21:10:00,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15619 conditions, 2632 events. 1631/2632 cut-off events. For 72945/72947 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13912 event pairs, 392 based on Foata normal form. 16/2643 useless extension candidates. Maximal degree in co-relation 15554. Up to 2133 conditions per place. [2024-06-27 21:10:00,959 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 54 changer transitions 0/194 dead transitions. [2024-06-27 21:10:00,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 194 transitions, 2294 flow [2024-06-27 21:10:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:10:00,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 21:10:00,960 INFO L175 Difference]: Start difference. First operand has 139 places, 157 transitions, 1778 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:10:00,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 194 transitions, 2294 flow [2024-06-27 21:10:01,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 194 transitions, 2182 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:01,022 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1809 flow [2024-06-27 21:10:01,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1809, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-27 21:10:01,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 21:10:01,022 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1809 flow [2024-06-27 21:10:01,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:01,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:01,023 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 21:10:01,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:10:01,023 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 21:10:01,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:01,023 INFO L85 PathProgramCache]: Analyzing trace with hash -855821625, now seen corresponding path program 4 times [2024-06-27 21:10:01,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:01,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141136459] [2024-06-27 21:10:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:01,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:04,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:04,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141136459] [2024-06-27 21:10:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141136459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:04,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:04,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775283395] [2024-06-27 21:10:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:04,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:04,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:04,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:04,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1809 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 21:10:04,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:04,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:04,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:05,774 INFO L124 PetriNetUnfolderBase]: 1699/2757 cut-off events. [2024-06-27 21:10:05,775 INFO L125 PetriNetUnfolderBase]: For 79130/79132 co-relation queries the response was YES. [2024-06-27 21:10:05,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16361 conditions, 2757 events. 1699/2757 cut-off events. For 79130/79132 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14883 event pairs, 410 based on Foata normal form. 16/2767 useless extension candidates. Maximal degree in co-relation 16295. Up to 2249 conditions per place. [2024-06-27 21:10:05,795 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 138 selfloop transitions, 57 changer transitions 0/200 dead transitions. [2024-06-27 21:10:05,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 200 transitions, 2353 flow [2024-06-27 21:10:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:10:05,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:10:05,797 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1809 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:10:05,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 200 transitions, 2353 flow [2024-06-27 21:10:05,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 200 transitions, 2228 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:05,887 INFO L231 Difference]: Finished difference. Result has 143 places, 159 transitions, 1835 flow [2024-06-27 21:10:05,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1835, PETRI_PLACES=143, PETRI_TRANSITIONS=159} [2024-06-27 21:10:05,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 21:10:05,888 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 159 transitions, 1835 flow [2024-06-27 21:10:05,888 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 21:10:05,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:05,888 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 21:10:05,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:10:05,889 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 21:10:05,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash -855969495, now seen corresponding path program 5 times [2024-06-27 21:10:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:05,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259327722] [2024-06-27 21:10:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:05,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:09,218 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 21:10:09,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:09,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259327722] [2024-06-27 21:10:09,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259327722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:09,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935170291] [2024-06-27 21:10:09,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:09,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:09,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:09,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 159 transitions, 1835 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 21:10:09,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:09,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:09,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:10,902 INFO L124 PetriNetUnfolderBase]: 1747/2841 cut-off events. [2024-06-27 21:10:10,902 INFO L125 PetriNetUnfolderBase]: For 82186/82188 co-relation queries the response was YES. [2024-06-27 21:10:10,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16808 conditions, 2841 events. 1747/2841 cut-off events. For 82186/82188 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15493 event pairs, 404 based on Foata normal form. 12/2847 useless extension candidates. Maximal degree in co-relation 16741. Up to 2227 conditions per place. [2024-06-27 21:10:10,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 60 changer transitions 0/209 dead transitions. [2024-06-27 21:10:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 209 transitions, 2427 flow [2024-06-27 21:10:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:10:10,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 21:10:10,925 INFO L175 Difference]: Start difference. First operand has 143 places, 159 transitions, 1835 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:10:10,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 209 transitions, 2427 flow [2024-06-27 21:10:11,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 209 transitions, 2294 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:11,006 INFO L231 Difference]: Finished difference. Result has 146 places, 160 transitions, 1860 flow [2024-06-27 21:10:11,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1860, PETRI_PLACES=146, PETRI_TRANSITIONS=160} [2024-06-27 21:10:11,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-27 21:10:11,006 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 160 transitions, 1860 flow [2024-06-27 21:10:11,007 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 21:10:11,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:11,007 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 21:10:11,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:10:11,007 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 21:10:11,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -850244043, now seen corresponding path program 1 times [2024-06-27 21:10:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:11,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778784220] [2024-06-27 21:10:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:13,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:13,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778784220] [2024-06-27 21:10:13,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778784220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:13,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:13,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:13,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069850044] [2024-06-27 21:10:13,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:13,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:13,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:13,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:13,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:13,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:13,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 160 transitions, 1860 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:13,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:13,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:13,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:15,059 INFO L124 PetriNetUnfolderBase]: 1891/3112 cut-off events. [2024-06-27 21:10:15,059 INFO L125 PetriNetUnfolderBase]: For 96794/96796 co-relation queries the response was YES. [2024-06-27 21:10:15,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18576 conditions, 3112 events. 1891/3112 cut-off events. For 96794/96796 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17598 event pairs, 452 based on Foata normal form. 12/3119 useless extension candidates. Maximal degree in co-relation 18508. Up to 2087 conditions per place. [2024-06-27 21:10:15,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 59 changer transitions 0/203 dead transitions. [2024-06-27 21:10:15,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 203 transitions, 2570 flow [2024-06-27 21:10:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:10:15,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 21:10:15,083 INFO L175 Difference]: Start difference. First operand has 146 places, 160 transitions, 1860 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:10:15,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 203 transitions, 2570 flow [2024-06-27 21:10:15,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 203 transitions, 2426 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:15,164 INFO L231 Difference]: Finished difference. Result has 146 places, 162 transitions, 1906 flow [2024-06-27 21:10:15,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1906, PETRI_PLACES=146, PETRI_TRANSITIONS=162} [2024-06-27 21:10:15,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-27 21:10:15,165 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 162 transitions, 1906 flow [2024-06-27 21:10:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:15,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:15,165 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 21:10:15,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:10:15,165 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 21:10:15,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash -494992893, now seen corresponding path program 6 times [2024-06-27 21:10:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:15,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172561377] [2024-06-27 21:10:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172561377] [2024-06-27 21:10:18,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172561377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:18,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:18,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287708021] [2024-06-27 21:10:18,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:18,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:18,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 162 transitions, 1906 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 21:10:18,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:18,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:18,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:19,724 INFO L124 PetriNetUnfolderBase]: 1863/3048 cut-off events. [2024-06-27 21:10:19,724 INFO L125 PetriNetUnfolderBase]: For 95840/95851 co-relation queries the response was YES. [2024-06-27 21:10:19,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17883 conditions, 3048 events. 1863/3048 cut-off events. For 95840/95851 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17105 event pairs, 497 based on Foata normal form. 18/3044 useless extension candidates. Maximal degree in co-relation 17814. Up to 2533 conditions per place. [2024-06-27 21:10:19,745 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 59 changer transitions 0/200 dead transitions. [2024-06-27 21:10:19,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 200 transitions, 2414 flow [2024-06-27 21:10:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:10:19,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:10:19,747 INFO L175 Difference]: Start difference. First operand has 146 places, 162 transitions, 1906 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:10:19,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 200 transitions, 2414 flow [2024-06-27 21:10:19,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 200 transitions, 2306 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:19,840 INFO L231 Difference]: Finished difference. Result has 151 places, 162 transitions, 1923 flow [2024-06-27 21:10:19,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1923, PETRI_PLACES=151, PETRI_TRANSITIONS=162} [2024-06-27 21:10:19,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-27 21:10:19,840 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 162 transitions, 1923 flow [2024-06-27 21:10:19,840 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 21:10:19,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:19,841 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 21:10:19,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:10:19,841 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 21:10:19,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1105441241, now seen corresponding path program 7 times [2024-06-27 21:10:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461367836] [2024-06-27 21:10:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:19,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:22,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461367836] [2024-06-27 21:10:22,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461367836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:22,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:22,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855325393] [2024-06-27 21:10:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:22,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:22,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:22,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 162 transitions, 1923 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 21:10:22,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:22,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:24,572 INFO L124 PetriNetUnfolderBase]: 1911/3120 cut-off events. [2024-06-27 21:10:24,573 INFO L125 PetriNetUnfolderBase]: For 97073/97084 co-relation queries the response was YES. [2024-06-27 21:10:24,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18369 conditions, 3120 events. 1911/3120 cut-off events. For 97073/97084 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17595 event pairs, 485 based on Foata normal form. 14/3112 useless extension candidates. Maximal degree in co-relation 18298. Up to 2511 conditions per place. [2024-06-27 21:10:24,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 142 selfloop transitions, 62 changer transitions 0/209 dead transitions. [2024-06-27 21:10:24,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 209 transitions, 2511 flow [2024-06-27 21:10:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 21:10:24,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 21:10:24,593 INFO L175 Difference]: Start difference. First operand has 151 places, 162 transitions, 1923 flow. Second operand 10 states and 178 transitions. [2024-06-27 21:10:24,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 209 transitions, 2511 flow [2024-06-27 21:10:24,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 209 transitions, 2388 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:24,684 INFO L231 Difference]: Finished difference. Result has 154 places, 163 transitions, 1966 flow [2024-06-27 21:10:24,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1966, PETRI_PLACES=154, PETRI_TRANSITIONS=163} [2024-06-27 21:10:24,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 21:10:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 163 transitions, 1966 flow [2024-06-27 21:10:24,684 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 21:10:24,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:24,685 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 21:10:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:10:24,685 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 21:10:24,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:24,685 INFO L85 PathProgramCache]: Analyzing trace with hash -414476153, now seen corresponding path program 8 times [2024-06-27 21:10:24,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:24,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472836805] [2024-06-27 21:10:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:27,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:27,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472836805] [2024-06-27 21:10:27,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472836805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:27,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:27,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298161495] [2024-06-27 21:10:27,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:27,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:27,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:27,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:27,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 163 transitions, 1966 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:27,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:27,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:27,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:28,667 INFO L124 PetriNetUnfolderBase]: 1951/3224 cut-off events. [2024-06-27 21:10:28,667 INFO L125 PetriNetUnfolderBase]: For 104210/104246 co-relation queries the response was YES. [2024-06-27 21:10:28,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18766 conditions, 3224 events. 1951/3224 cut-off events. For 104210/104246 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18549 event pairs, 514 based on Foata normal form. 29/3236 useless extension candidates. Maximal degree in co-relation 18694. Up to 2689 conditions per place. [2024-06-27 21:10:28,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 53 changer transitions 0/197 dead transitions. [2024-06-27 21:10:28,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 197 transitions, 2490 flow [2024-06-27 21:10:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:10:28,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:10:28,688 INFO L175 Difference]: Start difference. First operand has 154 places, 163 transitions, 1966 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:10:28,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 197 transitions, 2490 flow [2024-06-27 21:10:28,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 2338 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:28,779 INFO L231 Difference]: Finished difference. Result has 154 places, 164 transitions, 1965 flow [2024-06-27 21:10:28,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1965, PETRI_PLACES=154, PETRI_TRANSITIONS=164} [2024-06-27 21:10:28,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 21:10:28,780 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 164 transitions, 1965 flow [2024-06-27 21:10:28,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:28,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:28,781 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 21:10:28,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:10:28,781 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 21:10:28,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2014270103, now seen corresponding path program 2 times [2024-06-27 21:10:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:28,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468597759] [2024-06-27 21:10:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:31,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468597759] [2024-06-27 21:10:31,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468597759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:31,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:31,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:31,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435626230] [2024-06-27 21:10:31,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:31,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:31,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:31,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:31,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:31,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 164 transitions, 1965 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:31,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:31,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:31,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:32,566 INFO L124 PetriNetUnfolderBase]: 1999/3320 cut-off events. [2024-06-27 21:10:32,566 INFO L125 PetriNetUnfolderBase]: For 107217/107253 co-relation queries the response was YES. [2024-06-27 21:10:32,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19149 conditions, 3320 events. 1999/3320 cut-off events. For 107217/107253 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19389 event pairs, 514 based on Foata normal form. 25/3328 useless extension candidates. Maximal degree in co-relation 19076. Up to 2667 conditions per place. [2024-06-27 21:10:32,592 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 141 selfloop transitions, 55 changer transitions 0/201 dead transitions. [2024-06-27 21:10:32,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 201 transitions, 2511 flow [2024-06-27 21:10:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:10:32,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:10:32,593 INFO L175 Difference]: Start difference. First operand has 154 places, 164 transitions, 1965 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:10:32,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 201 transitions, 2511 flow [2024-06-27 21:10:32,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 201 transitions, 2378 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:32,715 INFO L231 Difference]: Finished difference. Result has 156 places, 165 transitions, 1988 flow [2024-06-27 21:10:32,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1988, PETRI_PLACES=156, PETRI_TRANSITIONS=165} [2024-06-27 21:10:32,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 21:10:32,716 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 165 transitions, 1988 flow [2024-06-27 21:10:32,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:32,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:32,716 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 21:10:32,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:10:32,716 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 21:10:32,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:32,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1748572823, now seen corresponding path program 3 times [2024-06-27 21:10:32,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:32,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560708789] [2024-06-27 21:10:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:32,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:35,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:35,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560708789] [2024-06-27 21:10:35,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560708789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:35,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:35,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905310462] [2024-06-27 21:10:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:35,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:35,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:35,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:35,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 165 transitions, 1988 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:35,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:35,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:35,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:36,493 INFO L124 PetriNetUnfolderBase]: 1979/3288 cut-off events. [2024-06-27 21:10:36,493 INFO L125 PetriNetUnfolderBase]: For 102648/102684 co-relation queries the response was YES. [2024-06-27 21:10:36,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18488 conditions, 3288 events. 1979/3288 cut-off events. For 102648/102684 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19126 event pairs, 449 based on Foata normal form. 25/3296 useless extension candidates. Maximal degree in co-relation 18414. Up to 1935 conditions per place. [2024-06-27 21:10:36,515 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 132 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-27 21:10:36,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2426 flow [2024-06-27 21:10:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:10:36,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 21:10:36,516 INFO L175 Difference]: Start difference. First operand has 156 places, 165 transitions, 1988 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:10:36,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2426 flow [2024-06-27 21:10:36,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 201 transitions, 2284 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:36,635 INFO L231 Difference]: Finished difference. Result has 157 places, 164 transitions, 1906 flow [2024-06-27 21:10:36,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1906, PETRI_PLACES=157, PETRI_TRANSITIONS=164} [2024-06-27 21:10:36,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 21:10:36,635 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 164 transitions, 1906 flow [2024-06-27 21:10:36,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:36,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:36,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:36,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:10:36,635 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:36,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 243848438, now seen corresponding path program 1 times [2024-06-27 21:10:36,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:36,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869997152] [2024-06-27 21:10:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:38,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:38,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869997152] [2024-06-27 21:10:38,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869997152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:38,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:38,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:10:38,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730897212] [2024-06-27 21:10:38,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:38,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:10:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:10:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:10:38,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:38,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 164 transitions, 1906 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:38,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:38,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:38,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:39,200 INFO L124 PetriNetUnfolderBase]: 1984/3290 cut-off events. [2024-06-27 21:10:39,200 INFO L125 PetriNetUnfolderBase]: For 97602/97604 co-relation queries the response was YES. [2024-06-27 21:10:39,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18580 conditions, 3290 events. 1984/3290 cut-off events. For 97602/97604 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19162 event pairs, 488 based on Foata normal form. 1/3287 useless extension candidates. Maximal degree in co-relation 18505. Up to 3080 conditions per place. [2024-06-27 21:10:39,221 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 164 selfloop transitions, 21 changer transitions 0/190 dead transitions. [2024-06-27 21:10:39,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 190 transitions, 2590 flow [2024-06-27 21:10:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 21:10:39,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 21:10:39,222 INFO L175 Difference]: Start difference. First operand has 157 places, 164 transitions, 1906 flow. Second operand 6 states and 104 transitions. [2024-06-27 21:10:39,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 190 transitions, 2590 flow [2024-06-27 21:10:39,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 190 transitions, 2391 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:39,328 INFO L231 Difference]: Finished difference. Result has 157 places, 173 transitions, 1897 flow [2024-06-27 21:10:39,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1897, PETRI_PLACES=157, PETRI_TRANSITIONS=173} [2024-06-27 21:10:39,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 21:10:39,329 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 173 transitions, 1897 flow [2024-06-27 21:10:39,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:39,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:39,329 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 21:10:39,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:10:39,329 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:39,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1652349366, now seen corresponding path program 2 times [2024-06-27 21:10:39,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:39,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438148089] [2024-06-27 21:10:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:40,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:40,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438148089] [2024-06-27 21:10:40,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438148089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:40,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:40,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:10:40,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225098002] [2024-06-27 21:10:40,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:40,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:10:40,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:40,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:10:40,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:10:40,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:40,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 173 transitions, 1897 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:40,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:40,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:40,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:41,718 INFO L124 PetriNetUnfolderBase]: 1989/3303 cut-off events. [2024-06-27 21:10:41,718 INFO L125 PetriNetUnfolderBase]: For 99934/99936 co-relation queries the response was YES. [2024-06-27 21:10:41,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18453 conditions, 3303 events. 1989/3303 cut-off events. For 99934/99936 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19321 event pairs, 483 based on Foata normal form. 1/3302 useless extension candidates. Maximal degree in co-relation 18377. Up to 3096 conditions per place. [2024-06-27 21:10:41,742 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 172 selfloop transitions, 19 changer transitions 0/196 dead transitions. [2024-06-27 21:10:41,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 196 transitions, 2452 flow [2024-06-27 21:10:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:10:41,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-27 21:10:41,744 INFO L175 Difference]: Start difference. First operand has 157 places, 173 transitions, 1897 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:10:41,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 196 transitions, 2452 flow [2024-06-27 21:10:41,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 196 transitions, 2362 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-27 21:10:41,828 INFO L231 Difference]: Finished difference. Result has 163 places, 176 transitions, 1910 flow [2024-06-27 21:10:41,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1910, PETRI_PLACES=163, PETRI_TRANSITIONS=176} [2024-06-27 21:10:41,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-27 21:10:41,829 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 176 transitions, 1910 flow [2024-06-27 21:10:41,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:41,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:41,830 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 21:10:41,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:10:41,830 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:41,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1053749799, now seen corresponding path program 1 times [2024-06-27 21:10:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:41,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221453274] [2024-06-27 21:10:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:41,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:44,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221453274] [2024-06-27 21:10:44,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221453274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:44,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:44,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:44,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599611120] [2024-06-27 21:10:44,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:44,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:44,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:44,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:10:44,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 176 transitions, 1910 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 21:10:44,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:44,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:10:44,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:45,475 INFO L124 PetriNetUnfolderBase]: 1908/3216 cut-off events. [2024-06-27 21:10:45,475 INFO L125 PetriNetUnfolderBase]: For 108456/108472 co-relation queries the response was YES. [2024-06-27 21:10:45,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18128 conditions, 3216 events. 1908/3216 cut-off events. For 108456/108472 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19186 event pairs, 450 based on Foata normal form. 18/3211 useless extension candidates. Maximal degree in co-relation 18048. Up to 2861 conditions per place. [2024-06-27 21:10:45,500 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 152 selfloop transitions, 41 changer transitions 0/210 dead transitions. [2024-06-27 21:10:45,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 210 transitions, 2535 flow [2024-06-27 21:10:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:10:45,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:10:45,501 INFO L175 Difference]: Start difference. First operand has 163 places, 176 transitions, 1910 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:10:45,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 210 transitions, 2535 flow [2024-06-27 21:10:45,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 210 transitions, 2501 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:45,609 INFO L231 Difference]: Finished difference. Result has 167 places, 187 transitions, 2075 flow [2024-06-27 21:10:45,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2075, PETRI_PLACES=167, PETRI_TRANSITIONS=187} [2024-06-27 21:10:45,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 21:10:45,609 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 187 transitions, 2075 flow [2024-06-27 21:10:45,610 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 21:10:45,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:45,610 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 21:10:45,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:10:45,610 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:45,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -870017149, now seen corresponding path program 2 times [2024-06-27 21:10:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88628017] [2024-06-27 21:10:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:47,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88628017] [2024-06-27 21:10:47,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88628017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:47,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:47,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344554947] [2024-06-27 21:10:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:47,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:47,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:10:47,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 187 transitions, 2075 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 21:10:47,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:47,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:10:47,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:48,790 INFO L124 PetriNetUnfolderBase]: 1895/3199 cut-off events. [2024-06-27 21:10:48,790 INFO L125 PetriNetUnfolderBase]: For 111518/111529 co-relation queries the response was YES. [2024-06-27 21:10:48,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18420 conditions, 3199 events. 1895/3199 cut-off events. For 111518/111529 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19086 event pairs, 451 based on Foata normal form. 13/3189 useless extension candidates. Maximal degree in co-relation 18339. Up to 2853 conditions per place. [2024-06-27 21:10:48,813 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 150 selfloop transitions, 39 changer transitions 0/206 dead transitions. [2024-06-27 21:10:48,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 206 transitions, 2505 flow [2024-06-27 21:10:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:10:48,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:10:48,814 INFO L175 Difference]: Start difference. First operand has 167 places, 187 transitions, 2075 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:10:48,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 206 transitions, 2505 flow [2024-06-27 21:10:48,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 206 transitions, 2453 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 21:10:48,910 INFO L231 Difference]: Finished difference. Result has 171 places, 187 transitions, 2116 flow [2024-06-27 21:10:48,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2116, PETRI_PLACES=171, PETRI_TRANSITIONS=187} [2024-06-27 21:10:48,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 21:10:48,911 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 187 transitions, 2116 flow [2024-06-27 21:10:48,911 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 21:10:48,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:48,911 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 21:10:48,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:10:48,911 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:48,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:48,911 INFO L85 PathProgramCache]: Analyzing trace with hash -870005059, now seen corresponding path program 3 times [2024-06-27 21:10:48,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:48,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951317169] [2024-06-27 21:10:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:48,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:50,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:50,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951317169] [2024-06-27 21:10:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951317169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:50,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001742618] [2024-06-27 21:10:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:50,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:51,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:10:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 187 transitions, 2116 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 21:10:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:10:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:52,013 INFO L124 PetriNetUnfolderBase]: 1884/3175 cut-off events. [2024-06-27 21:10:52,013 INFO L125 PetriNetUnfolderBase]: For 113748/113762 co-relation queries the response was YES. [2024-06-27 21:10:52,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18346 conditions, 3175 events. 1884/3175 cut-off events. For 113748/113762 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18905 event pairs, 455 based on Foata normal form. 15/3155 useless extension candidates. Maximal degree in co-relation 18263. Up to 2827 conditions per place. [2024-06-27 21:10:52,039 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 143 selfloop transitions, 43 changer transitions 0/203 dead transitions. [2024-06-27 21:10:52,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 203 transitions, 2550 flow [2024-06-27 21:10:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:10:52,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:10:52,041 INFO L175 Difference]: Start difference. First operand has 171 places, 187 transitions, 2116 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:10:52,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 203 transitions, 2550 flow [2024-06-27 21:10:52,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 203 transitions, 2462 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:52,166 INFO L231 Difference]: Finished difference. Result has 171 places, 190 transitions, 2154 flow [2024-06-27 21:10:52,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2154, PETRI_PLACES=171, PETRI_TRANSITIONS=190} [2024-06-27 21:10:52,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 21:10:52,167 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 190 transitions, 2154 flow [2024-06-27 21:10:52,167 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 21:10:52,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:52,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:52,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:10:52,167 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:52,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1371536333, now seen corresponding path program 1 times [2024-06-27 21:10:52,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:52,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54617759] [2024-06-27 21:10:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:52,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:53,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:53,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54617759] [2024-06-27 21:10:53,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54617759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:53,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:53,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:10:53,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781958940] [2024-06-27 21:10:53,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:53,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:10:53,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:10:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:10:53,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:53,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 190 transitions, 2154 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:53,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:53,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:53,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:54,749 INFO L124 PetriNetUnfolderBase]: 2032/3373 cut-off events. [2024-06-27 21:10:54,749 INFO L125 PetriNetUnfolderBase]: For 112241/112249 co-relation queries the response was YES. [2024-06-27 21:10:54,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19539 conditions, 3373 events. 2032/3373 cut-off events. For 112241/112249 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19769 event pairs, 489 based on Foata normal form. 5/3375 useless extension candidates. Maximal degree in co-relation 19456. Up to 3147 conditions per place. [2024-06-27 21:10:54,774 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 179 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-27 21:10:54,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 209 transitions, 2729 flow [2024-06-27 21:10:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:10:54,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 21:10:54,775 INFO L175 Difference]: Start difference. First operand has 171 places, 190 transitions, 2154 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:10:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 209 transitions, 2729 flow [2024-06-27 21:10:54,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 209 transitions, 2625 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:54,910 INFO L231 Difference]: Finished difference. Result has 173 places, 193 transitions, 2147 flow [2024-06-27 21:10:54,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2147, PETRI_PLACES=173, PETRI_TRANSITIONS=193} [2024-06-27 21:10:54,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 21:10:54,911 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 193 transitions, 2147 flow [2024-06-27 21:10:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:54,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:54,911 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 21:10:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:10:54,911 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 21:10:54,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash -990009765, now seen corresponding path program 2 times [2024-06-27 21:10:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740054199] [2024-06-27 21:10:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:56,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:56,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740054199] [2024-06-27 21:10:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740054199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:56,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920901285] [2024-06-27 21:10:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:56,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:56,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 193 transitions, 2147 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 21:10:56,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:56,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:56,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:58,061 INFO L124 PetriNetUnfolderBase]: 2029/3364 cut-off events. [2024-06-27 21:10:58,061 INFO L125 PetriNetUnfolderBase]: For 115306/115308 co-relation queries the response was YES. [2024-06-27 21:10:58,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19439 conditions, 3364 events. 2029/3364 cut-off events. For 115306/115308 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19626 event pairs, 489 based on Foata normal form. 1/3361 useless extension candidates. Maximal degree in co-relation 19355. Up to 3144 conditions per place. [2024-06-27 21:10:58,087 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 178 selfloop transitions, 27 changer transitions 0/210 dead transitions. [2024-06-27 21:10:58,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 210 transitions, 2687 flow [2024-06-27 21:10:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:10:58,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 21:10:58,089 INFO L175 Difference]: Start difference. First operand has 173 places, 193 transitions, 2147 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:10:58,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 210 transitions, 2687 flow [2024-06-27 21:10:58,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 210 transitions, 2603 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:58,204 INFO L231 Difference]: Finished difference. Result has 176 places, 193 transitions, 2123 flow [2024-06-27 21:10:58,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2123, PETRI_PLACES=176, PETRI_TRANSITIONS=193} [2024-06-27 21:10:58,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 21:10:58,205 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 193 transitions, 2123 flow [2024-06-27 21:10:58,205 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 21:10:58,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:58,205 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 21:10:58,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:10:58,206 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 21:10:58,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:58,206 INFO L85 PathProgramCache]: Analyzing trace with hash -705731337, now seen corresponding path program 1 times [2024-06-27 21:10:58,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:58,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020916683] [2024-06-27 21:10:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:58,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:59,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:59,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020916683] [2024-06-27 21:10:59,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020916683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:59,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:59,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604248543] [2024-06-27 21:10:59,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:00,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:00,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 193 transitions, 2123 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 21:11:00,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:00,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:00,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:01,338 INFO L124 PetriNetUnfolderBase]: 2039/3377 cut-off events. [2024-06-27 21:11:01,338 INFO L125 PetriNetUnfolderBase]: For 121013/121015 co-relation queries the response was YES. [2024-06-27 21:11:01,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19631 conditions, 3377 events. 2039/3377 cut-off events. For 121013/121015 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19699 event pairs, 487 based on Foata normal form. 2/3375 useless extension candidates. Maximal degree in co-relation 19547. Up to 3109 conditions per place. [2024-06-27 21:11:01,364 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 34 changer transitions 0/223 dead transitions. [2024-06-27 21:11:01,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 223 transitions, 2897 flow [2024-06-27 21:11:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:11:01,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:11:01,365 INFO L175 Difference]: Start difference. First operand has 176 places, 193 transitions, 2123 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:11:01,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 223 transitions, 2897 flow [2024-06-27 21:11:01,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 223 transitions, 2805 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:01,510 INFO L231 Difference]: Finished difference. Result has 177 places, 202 transitions, 2249 flow [2024-06-27 21:11:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2249, PETRI_PLACES=177, PETRI_TRANSITIONS=202} [2024-06-27 21:11:01,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 21:11:01,511 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 202 transitions, 2249 flow [2024-06-27 21:11:01,511 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 21:11:01,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:01,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:11:01,511 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 21:11:01,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -282813501, now seen corresponding path program 2 times [2024-06-27 21:11:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:01,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579684846] [2024-06-27 21:11:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:03,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579684846] [2024-06-27 21:11:03,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579684846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:03,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:03,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:03,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733698537] [2024-06-27 21:11:03,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:03,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:03,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:03,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:03,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 202 transitions, 2249 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 21:11:03,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:03,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:03,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:04,380 INFO L124 PetriNetUnfolderBase]: 2065/3424 cut-off events. [2024-06-27 21:11:04,380 INFO L125 PetriNetUnfolderBase]: For 128899/128901 co-relation queries the response was YES. [2024-06-27 21:11:04,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20490 conditions, 3424 events. 2065/3424 cut-off events. For 128899/128901 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20069 event pairs, 478 based on Foata normal form. 2/3424 useless extension candidates. Maximal degree in co-relation 20405. Up to 3160 conditions per place. [2024-06-27 21:11:04,406 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 29 changer transitions 0/234 dead transitions. [2024-06-27 21:11:04,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 234 transitions, 3037 flow [2024-06-27 21:11:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:11:04,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:11:04,407 INFO L175 Difference]: Start difference. First operand has 177 places, 202 transitions, 2249 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:11:04,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 234 transitions, 3037 flow [2024-06-27 21:11:04,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 234 transitions, 2977 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 21:11:04,553 INFO L231 Difference]: Finished difference. Result has 183 places, 208 transitions, 2357 flow [2024-06-27 21:11:04,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2357, PETRI_PLACES=183, PETRI_TRANSITIONS=208} [2024-06-27 21:11:04,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 21:11:04,554 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 208 transitions, 2357 flow [2024-06-27 21:11:04,554 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 21:11:04,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:04,554 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 21:11:04,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:11:04,554 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 21:11:04,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:04,554 INFO L85 PathProgramCache]: Analyzing trace with hash -316538091, now seen corresponding path program 3 times [2024-06-27 21:11:04,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:04,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846287380] [2024-06-27 21:11:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:06,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846287380] [2024-06-27 21:11:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846287380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:06,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:06,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:06,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498788369] [2024-06-27 21:11:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:06,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:06,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:06,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 208 transitions, 2357 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 21:11:06,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:06,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:07,593 INFO L124 PetriNetUnfolderBase]: 2059/3414 cut-off events. [2024-06-27 21:11:07,594 INFO L125 PetriNetUnfolderBase]: For 131271/131273 co-relation queries the response was YES. [2024-06-27 21:11:07,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20350 conditions, 3414 events. 2059/3414 cut-off events. For 131271/131273 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19954 event pairs, 476 based on Foata normal form. 2/3414 useless extension candidates. Maximal degree in co-relation 20261. Up to 3157 conditions per place. [2024-06-27 21:11:07,620 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 197 selfloop transitions, 28 changer transitions 0/230 dead transitions. [2024-06-27 21:11:07,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 230 transitions, 3043 flow [2024-06-27 21:11:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:11:07,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:11:07,622 INFO L175 Difference]: Start difference. First operand has 183 places, 208 transitions, 2357 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:11:07,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 230 transitions, 3043 flow [2024-06-27 21:11:07,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 230 transitions, 2935 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 21:11:07,783 INFO L231 Difference]: Finished difference. Result has 187 places, 208 transitions, 2311 flow [2024-06-27 21:11:07,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2311, PETRI_PLACES=187, PETRI_TRANSITIONS=208} [2024-06-27 21:11:07,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 21:11:07,784 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 208 transitions, 2311 flow [2024-06-27 21:11:07,784 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 21:11:07,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:07,784 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 21:11:07,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:11:07,784 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 21:11:07,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:07,785 INFO L85 PathProgramCache]: Analyzing trace with hash -107509163, now seen corresponding path program 3 times [2024-06-27 21:11:07,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:07,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327660073] [2024-06-27 21:11:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:07,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:09,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327660073] [2024-06-27 21:11:09,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327660073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:09,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:09,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:11:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083972565] [2024-06-27 21:11:09,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:09,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:11:09,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:09,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:11:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:11:09,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:09,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 208 transitions, 2311 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:09,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:09,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:09,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:10,309 INFO L124 PetriNetUnfolderBase]: 2056/3406 cut-off events. [2024-06-27 21:11:10,309 INFO L125 PetriNetUnfolderBase]: For 134471/134473 co-relation queries the response was YES. [2024-06-27 21:11:10,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20285 conditions, 3406 events. 2056/3406 cut-off events. For 134471/134473 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19869 event pairs, 483 based on Foata normal form. 1/3405 useless extension candidates. Maximal degree in co-relation 20195. Up to 3192 conditions per place. [2024-06-27 21:11:10,335 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 203 selfloop transitions, 19 changer transitions 0/227 dead transitions. [2024-06-27 21:11:10,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 2809 flow [2024-06-27 21:11:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:11:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:11:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:11:10,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:11:10,336 INFO L175 Difference]: Start difference. First operand has 187 places, 208 transitions, 2311 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:11:10,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 2809 flow [2024-06-27 21:11:10,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 227 transitions, 2731 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:10,532 INFO L231 Difference]: Finished difference. Result has 187 places, 208 transitions, 2281 flow [2024-06-27 21:11:10,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=187, PETRI_TRANSITIONS=208} [2024-06-27 21:11:10,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 21:11:10,533 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 208 transitions, 2281 flow [2024-06-27 21:11:10,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:10,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:10,533 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 21:11:10,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:11:10,533 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 21:11:10,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash -316529163, now seen corresponding path program 1 times [2024-06-27 21:11:10,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:10,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420388445] [2024-06-27 21:11:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:10,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:13,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:13,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420388445] [2024-06-27 21:11:13,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420388445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:13,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:13,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:13,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259273856] [2024-06-27 21:11:13,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:13,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:13,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:13,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:11:13,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 208 transitions, 2281 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 21:11:13,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:13,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:11:13,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:14,040 INFO L124 PetriNetUnfolderBase]: 1908/3227 cut-off events. [2024-06-27 21:11:14,040 INFO L125 PetriNetUnfolderBase]: For 138224/138235 co-relation queries the response was YES. [2024-06-27 21:11:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19437 conditions, 3227 events. 1908/3227 cut-off events. For 138224/138235 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19272 event pairs, 454 based on Foata normal form. 11/3218 useless extension candidates. Maximal degree in co-relation 19346. Up to 2946 conditions per place. [2024-06-27 21:11:14,069 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 194 selfloop transitions, 12 changer transitions 0/223 dead transitions. [2024-06-27 21:11:14,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 223 transitions, 2753 flow [2024-06-27 21:11:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:11:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:11:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:11:14,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:11:14,070 INFO L175 Difference]: Start difference. First operand has 187 places, 208 transitions, 2281 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:11:14,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 223 transitions, 2753 flow [2024-06-27 21:11:14,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 223 transitions, 2709 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:14,249 INFO L231 Difference]: Finished difference. Result has 187 places, 210 transitions, 2296 flow [2024-06-27 21:11:14,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2296, PETRI_PLACES=187, PETRI_TRANSITIONS=210} [2024-06-27 21:11:14,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 21:11:14,249 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 210 transitions, 2296 flow [2024-06-27 21:11:14,249 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 21:11:14,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:14,250 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 21:11:14,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:11:14,250 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 21:11:14,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1687774739, now seen corresponding path program 1 times [2024-06-27 21:11:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:14,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26604717] [2024-06-27 21:11:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:16,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:16,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26604717] [2024-06-27 21:11:16,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26604717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:16,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:16,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569266231] [2024-06-27 21:11:16,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:16,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:16,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:16,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:16,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 210 transitions, 2296 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 21:11:16,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:16,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:16,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:17,929 INFO L124 PetriNetUnfolderBase]: 2064/3424 cut-off events. [2024-06-27 21:11:17,929 INFO L125 PetriNetUnfolderBase]: For 139251/139257 co-relation queries the response was YES. [2024-06-27 21:11:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20474 conditions, 3424 events. 2064/3424 cut-off events. For 139251/139257 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20083 event pairs, 477 based on Foata normal form. 7/3426 useless extension candidates. Maximal degree in co-relation 20383. Up to 3064 conditions per place. [2024-06-27 21:11:17,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 50 changer transitions 0/247 dead transitions. [2024-06-27 21:11:17,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 247 transitions, 3214 flow [2024-06-27 21:11:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:11:17,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 21:11:17,957 INFO L175 Difference]: Start difference. First operand has 187 places, 210 transitions, 2296 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:11:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 247 transitions, 3214 flow [2024-06-27 21:11:18,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 247 transitions, 3171 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:11:18,146 INFO L231 Difference]: Finished difference. Result has 192 places, 219 transitions, 2552 flow [2024-06-27 21:11:18,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2552, PETRI_PLACES=192, PETRI_TRANSITIONS=219} [2024-06-27 21:11:18,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-27 21:11:18,147 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 219 transitions, 2552 flow [2024-06-27 21:11:18,147 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 21:11:18,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:18,147 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 21:11:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:11:18,147 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 21:11:18,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1693488659, now seen corresponding path program 2 times [2024-06-27 21:11:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61373434] [2024-06-27 21:11:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61373434] [2024-06-27 21:11:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61373434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:20,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:20,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041908966] [2024-06-27 21:11:20,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:20,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:20,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:20,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:20,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 219 transitions, 2552 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 21:11:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:21,743 INFO L124 PetriNetUnfolderBase]: 2087/3461 cut-off events. [2024-06-27 21:11:21,743 INFO L125 PetriNetUnfolderBase]: For 148438/148440 co-relation queries the response was YES. [2024-06-27 21:11:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21537 conditions, 3461 events. 2087/3461 cut-off events. For 148438/148440 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20275 event pairs, 472 based on Foata normal form. 1/3460 useless extension candidates. Maximal degree in co-relation 21443. Up to 3148 conditions per place. [2024-06-27 21:11:21,770 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 53 changer transitions 0/253 dead transitions. [2024-06-27 21:11:21,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 253 transitions, 3391 flow [2024-06-27 21:11:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:11:21,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:11:21,771 INFO L175 Difference]: Start difference. First operand has 192 places, 219 transitions, 2552 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:11:21,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 253 transitions, 3391 flow [2024-06-27 21:11:22,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 253 transitions, 3287 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 21:11:22,033 INFO L231 Difference]: Finished difference. Result has 199 places, 231 transitions, 2785 flow [2024-06-27 21:11:22,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2785, PETRI_PLACES=199, PETRI_TRANSITIONS=231} [2024-06-27 21:11:22,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 21:11:22,034 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 231 transitions, 2785 flow [2024-06-27 21:11:22,034 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 21:11:22,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:22,034 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 21:11:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:11:22,035 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 21:11:22,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:22,035 INFO L85 PathProgramCache]: Analyzing trace with hash 424331741, now seen corresponding path program 3 times [2024-06-27 21:11:22,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:22,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519704041] [2024-06-27 21:11:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:24,398 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 21:11:24,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:24,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519704041] [2024-06-27 21:11:24,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519704041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:24,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:24,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:24,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333582634] [2024-06-27 21:11:24,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:24,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:24,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:24,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 231 transitions, 2785 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 21:11:24,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:24,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:24,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:25,755 INFO L124 PetriNetUnfolderBase]: 2092/3460 cut-off events. [2024-06-27 21:11:25,755 INFO L125 PetriNetUnfolderBase]: For 154613/154631 co-relation queries the response was YES. [2024-06-27 21:11:25,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21631 conditions, 3460 events. 2092/3460 cut-off events. For 154613/154631 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20308 event pairs, 494 based on Foata normal form. 13/3463 useless extension candidates. Maximal degree in co-relation 21534. Up to 3095 conditions per place. [2024-06-27 21:11:25,786 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 62 changer transitions 0/262 dead transitions. [2024-06-27 21:11:25,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 262 transitions, 3799 flow [2024-06-27 21:11:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:11:25,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 21:11:25,787 INFO L175 Difference]: Start difference. First operand has 199 places, 231 transitions, 2785 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:11:25,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 262 transitions, 3799 flow [2024-06-27 21:11:26,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 262 transitions, 3661 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:26,033 INFO L231 Difference]: Finished difference. Result has 201 places, 237 transitions, 2911 flow [2024-06-27 21:11:26,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2911, PETRI_PLACES=201, PETRI_TRANSITIONS=237} [2024-06-27 21:11:26,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-27 21:11:26,034 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 237 transitions, 2911 flow [2024-06-27 21:11:26,034 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 21:11:26,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:26,034 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 21:11:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:11:26,034 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 21:11:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 424660031, now seen corresponding path program 4 times [2024-06-27 21:11:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338482620] [2024-06-27 21:11:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338482620] [2024-06-27 21:11:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338482620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943454694] [2024-06-27 21:11:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:28,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:28,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 237 transitions, 2911 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 21:11:28,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:28,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:28,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:29,431 INFO L124 PetriNetUnfolderBase]: 2097/3463 cut-off events. [2024-06-27 21:11:29,431 INFO L125 PetriNetUnfolderBase]: For 161176/161194 co-relation queries the response was YES. [2024-06-27 21:11:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21885 conditions, 3463 events. 2097/3463 cut-off events. For 161176/161194 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20257 event pairs, 492 based on Foata normal form. 13/3466 useless extension candidates. Maximal degree in co-relation 21787. Up to 3099 conditions per place. [2024-06-27 21:11:29,462 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 65 changer transitions 0/260 dead transitions. [2024-06-27 21:11:29,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 260 transitions, 3753 flow [2024-06-27 21:11:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:11:29,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:11:29,464 INFO L175 Difference]: Start difference. First operand has 201 places, 237 transitions, 2911 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:11:29,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 260 transitions, 3753 flow [2024-06-27 21:11:29,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 260 transitions, 3619 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 21:11:29,749 INFO L231 Difference]: Finished difference. Result has 205 places, 240 transitions, 2985 flow [2024-06-27 21:11:29,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2985, PETRI_PLACES=205, PETRI_TRANSITIONS=240} [2024-06-27 21:11:29,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-27 21:11:29,749 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 240 transitions, 2985 flow [2024-06-27 21:11:29,750 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 21:11:29,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:29,750 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 21:11:29,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:11:29,750 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 21:11:29,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1200733783, now seen corresponding path program 5 times [2024-06-27 21:11:29,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:29,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256534487] [2024-06-27 21:11:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:29,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:32,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256534487] [2024-06-27 21:11:32,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256534487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:32,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:32,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:32,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324578378] [2024-06-27 21:11:32,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:32,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:32,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:32,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:32,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 240 transitions, 2985 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 21:11:32,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:32,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:32,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:33,680 INFO L124 PetriNetUnfolderBase]: 2102/3480 cut-off events. [2024-06-27 21:11:33,680 INFO L125 PetriNetUnfolderBase]: For 164751/164753 co-relation queries the response was YES. [2024-06-27 21:11:33,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22073 conditions, 3480 events. 2102/3480 cut-off events. For 164751/164753 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20386 event pairs, 473 based on Foata normal form. 1/3479 useless extension candidates. Maximal degree in co-relation 21973. Up to 3013 conditions per place. [2024-06-27 21:11:33,711 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 98 changer transitions 0/276 dead transitions. [2024-06-27 21:11:33,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 276 transitions, 3780 flow [2024-06-27 21:11:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:11:33,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 21:11:33,712 INFO L175 Difference]: Start difference. First operand has 205 places, 240 transitions, 2985 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:11:33,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 276 transitions, 3780 flow [2024-06-27 21:11:33,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 276 transitions, 3602 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 21:11:33,885 INFO L231 Difference]: Finished difference. Result has 210 places, 243 transitions, 3149 flow [2024-06-27 21:11:33,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3149, PETRI_PLACES=210, PETRI_TRANSITIONS=243} [2024-06-27 21:11:33,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 21:11:33,886 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 243 transitions, 3149 flow [2024-06-27 21:11:33,886 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 21:11:33,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:33,886 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 21:11:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:11:33,886 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 21:11:33,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash 962177117, now seen corresponding path program 6 times [2024-06-27 21:11:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:33,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802493668] [2024-06-27 21:11:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:33,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802493668] [2024-06-27 21:11:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802493668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:36,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27647488] [2024-06-27 21:11:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:36,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:36,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:36,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 243 transitions, 3149 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 21:11:36,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:36,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:36,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:37,226 INFO L124 PetriNetUnfolderBase]: 2099/3474 cut-off events. [2024-06-27 21:11:37,226 INFO L125 PetriNetUnfolderBase]: For 170704/170712 co-relation queries the response was YES. [2024-06-27 21:11:37,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22349 conditions, 3474 events. 2099/3474 cut-off events. For 170704/170712 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20378 event pairs, 491 based on Foata normal form. 2/3464 useless extension candidates. Maximal degree in co-relation 22247. Up to 3011 conditions per place. [2024-06-27 21:11:37,258 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 98 changer transitions 0/268 dead transitions. [2024-06-27 21:11:37,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 268 transitions, 3849 flow [2024-06-27 21:11:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:11:37,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 21:11:37,259 INFO L175 Difference]: Start difference. First operand has 210 places, 243 transitions, 3149 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:11:37,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 268 transitions, 3849 flow [2024-06-27 21:11:37,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 268 transitions, 3652 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:37,479 INFO L231 Difference]: Finished difference. Result has 211 places, 243 transitions, 3160 flow [2024-06-27 21:11:37,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3160, PETRI_PLACES=211, PETRI_TRANSITIONS=243} [2024-06-27 21:11:37,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 21:11:37,480 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 243 transitions, 3160 flow [2024-06-27 21:11:37,480 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 21:11:37,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:37,480 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 21:11:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:11:37,481 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 21:11:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1403365872, now seen corresponding path program 1 times [2024-06-27 21:11:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:37,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643228131] [2024-06-27 21:11:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:39,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:39,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643228131] [2024-06-27 21:11:39,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643228131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:39,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:39,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:39,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212411975] [2024-06-27 21:11:39,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:39,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:39,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:39,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:39,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 243 transitions, 3160 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:39,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:39,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:39,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:40,650 INFO L124 PetriNetUnfolderBase]: 2109/3495 cut-off events. [2024-06-27 21:11:40,650 INFO L125 PetriNetUnfolderBase]: For 172641/172649 co-relation queries the response was YES. [2024-06-27 21:11:40,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22457 conditions, 3495 events. 2109/3495 cut-off events. For 172641/172649 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20559 event pairs, 489 based on Foata normal form. 6/3498 useless extension candidates. Maximal degree in co-relation 22354. Up to 3195 conditions per place. [2024-06-27 21:11:40,679 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 40 changer transitions 0/266 dead transitions. [2024-06-27 21:11:40,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 266 transitions, 3875 flow [2024-06-27 21:11:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:11:40,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 21:11:40,680 INFO L175 Difference]: Start difference. First operand has 211 places, 243 transitions, 3160 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:11:40,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 266 transitions, 3875 flow [2024-06-27 21:11:40,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 266 transitions, 3692 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:40,941 INFO L231 Difference]: Finished difference. Result has 212 places, 246 transitions, 3100 flow [2024-06-27 21:11:40,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3100, PETRI_PLACES=212, PETRI_TRANSITIONS=246} [2024-06-27 21:11:40,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 21:11:40,941 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 246 transitions, 3100 flow [2024-06-27 21:11:40,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:40,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:40,942 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 21:11:40,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:11:40,942 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 21:11:40,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash -625524098, now seen corresponding path program 2 times [2024-06-27 21:11:40,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:40,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256321910] [2024-06-27 21:11:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:43,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256321910] [2024-06-27 21:11:43,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256321910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:43,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:43,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807885059] [2024-06-27 21:11:43,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:43,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:43,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:43,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:43,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 246 transitions, 3100 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 21:11:43,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:43,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:43,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:45,084 INFO L124 PetriNetUnfolderBase]: 2119/3500 cut-off events. [2024-06-27 21:11:45,084 INFO L125 PetriNetUnfolderBase]: For 178123/178125 co-relation queries the response was YES. [2024-06-27 21:11:45,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22498 conditions, 3500 events. 2119/3500 cut-off events. For 178123/178125 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20495 event pairs, 489 based on Foata normal form. 2/3498 useless extension candidates. Maximal degree in co-relation 22394. Up to 3205 conditions per place. [2024-06-27 21:11:45,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 47 changer transitions 0/275 dead transitions. [2024-06-27 21:11:45,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 275 transitions, 3959 flow [2024-06-27 21:11:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:11:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:11:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 21:11:45,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 21:11:45,116 INFO L175 Difference]: Start difference. First operand has 212 places, 246 transitions, 3100 flow. Second operand 10 states and 159 transitions. [2024-06-27 21:11:45,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 275 transitions, 3959 flow [2024-06-27 21:11:45,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 275 transitions, 3839 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:45,381 INFO L231 Difference]: Finished difference. Result has 217 places, 249 transitions, 3123 flow [2024-06-27 21:11:45,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3123, PETRI_PLACES=217, PETRI_TRANSITIONS=249} [2024-06-27 21:11:45,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-27 21:11:45,382 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 249 transitions, 3123 flow [2024-06-27 21:11:45,382 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 21:11:45,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:45,382 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 21:11:45,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:11:45,382 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 21:11:45,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1399646802, now seen corresponding path program 3 times [2024-06-27 21:11:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:45,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434734775] [2024-06-27 21:11:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:45,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:47,510 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 21:11:47,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434734775] [2024-06-27 21:11:47,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434734775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:47,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:47,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132001236] [2024-06-27 21:11:47,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:47,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:47,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:47,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:47,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 249 transitions, 3123 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 21:11:47,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:47,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:47,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:49,104 INFO L124 PetriNetUnfolderBase]: 2113/3494 cut-off events. [2024-06-27 21:11:49,104 INFO L125 PetriNetUnfolderBase]: For 180864/180866 co-relation queries the response was YES. [2024-06-27 21:11:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22440 conditions, 3494 events. 2113/3494 cut-off events. For 180864/180866 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20477 event pairs, 488 based on Foata normal form. 2/3492 useless extension candidates. Maximal degree in co-relation 22336. Up to 3200 conditions per place. [2024-06-27 21:11:49,133 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 46 changer transitions 0/272 dead transitions. [2024-06-27 21:11:49,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 272 transitions, 3823 flow [2024-06-27 21:11:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:11:49,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:11:49,134 INFO L175 Difference]: Start difference. First operand has 217 places, 249 transitions, 3123 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:11:49,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 272 transitions, 3823 flow [2024-06-27 21:11:49,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 272 transitions, 3643 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 21:11:49,379 INFO L231 Difference]: Finished difference. Result has 215 places, 249 transitions, 3041 flow [2024-06-27 21:11:49,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3041, PETRI_PLACES=215, PETRI_TRANSITIONS=249} [2024-06-27 21:11:49,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 21:11:49,379 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 249 transitions, 3041 flow [2024-06-27 21:11:49,379 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 21:11:49,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:49,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:49,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:11:49,380 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 21:11:49,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1222744450, now seen corresponding path program 4 times [2024-06-27 21:11:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:49,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205627309] [2024-06-27 21:11:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:49,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:51,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:51,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205627309] [2024-06-27 21:11:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205627309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:51,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:51,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:51,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498466463] [2024-06-27 21:11:51,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:51,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:51,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:51,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 249 transitions, 3041 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:51,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:51,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:51,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:52,501 INFO L124 PetriNetUnfolderBase]: 2123/3514 cut-off events. [2024-06-27 21:11:52,501 INFO L125 PetriNetUnfolderBase]: For 186100/186102 co-relation queries the response was YES. [2024-06-27 21:11:52,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22467 conditions, 3514 events. 2123/3514 cut-off events. For 186100/186102 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20637 event pairs, 475 based on Foata normal form. 2/3514 useless extension candidates. Maximal degree in co-relation 22364. Up to 3245 conditions per place. [2024-06-27 21:11:52,535 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 32 changer transitions 0/273 dead transitions. [2024-06-27 21:11:52,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 273 transitions, 3775 flow [2024-06-27 21:11:52,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:11:52,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:11:52,536 INFO L175 Difference]: Start difference. First operand has 215 places, 249 transitions, 3041 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:11:52,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 273 transitions, 3775 flow [2024-06-27 21:11:52,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 273 transitions, 3677 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:52,752 INFO L231 Difference]: Finished difference. Result has 216 places, 252 transitions, 3048 flow [2024-06-27 21:11:52,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3048, PETRI_PLACES=216, PETRI_TRANSITIONS=252} [2024-06-27 21:11:52,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 21:11:52,752 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 252 transitions, 3048 flow [2024-06-27 21:11:52,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:52,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:52,753 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 21:11:52,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:11:52,753 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 21:11:52,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash 962185208, now seen corresponding path program 5 times [2024-06-27 21:11:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:52,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109000167] [2024-06-27 21:11:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:52,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:54,535 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 21:11:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:54,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109000167] [2024-06-27 21:11:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109000167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:54,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:54,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:11:54,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45179394] [2024-06-27 21:11:54,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:54,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:11:54,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:54,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:11:54,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:11:54,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:54,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 252 transitions, 3048 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:54,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:54,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:54,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:55,626 INFO L124 PetriNetUnfolderBase]: 2117/3506 cut-off events. [2024-06-27 21:11:55,626 INFO L125 PetriNetUnfolderBase]: For 189023/189025 co-relation queries the response was YES. [2024-06-27 21:11:55,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22382 conditions, 3506 events. 2117/3506 cut-off events. For 189023/189025 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20600 event pairs, 476 based on Foata normal form. 2/3506 useless extension candidates. Maximal degree in co-relation 22278. Up to 3240 conditions per place. [2024-06-27 21:11:55,656 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 32 changer transitions 0/276 dead transitions. [2024-06-27 21:11:55,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 276 transitions, 3654 flow [2024-06-27 21:11:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:11:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:11:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:11:55,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 21:11:55,657 INFO L175 Difference]: Start difference. First operand has 216 places, 252 transitions, 3048 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:11:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 276 transitions, 3654 flow [2024-06-27 21:11:55,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 276 transitions, 3587 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:55,844 INFO L231 Difference]: Finished difference. Result has 218 places, 252 transitions, 3051 flow [2024-06-27 21:11:55,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3051, PETRI_PLACES=218, PETRI_TRANSITIONS=252} [2024-06-27 21:11:55,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 21:11:55,845 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 252 transitions, 3051 flow [2024-06-27 21:11:55,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:55,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:55,845 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 21:11:55,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:11:55,845 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 21:11:55,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:55,846 INFO L85 PathProgramCache]: Analyzing trace with hash 665821250, now seen corresponding path program 1 times [2024-06-27 21:11:55,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:55,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254678197] [2024-06-27 21:11:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:55,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:58,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:58,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254678197] [2024-06-27 21:11:58,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254678197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:58,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:58,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:58,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105767126] [2024-06-27 21:11:58,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:58,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:58,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:58,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:58,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:58,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 252 transitions, 3051 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 21:11:58,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:58,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:58,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:00,089 INFO L124 PetriNetUnfolderBase]: 2130/3527 cut-off events. [2024-06-27 21:12:00,089 INFO L125 PetriNetUnfolderBase]: For 194960/194966 co-relation queries the response was YES. [2024-06-27 21:12:00,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22684 conditions, 3527 events. 2130/3527 cut-off events. For 194960/194966 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20741 event pairs, 463 based on Foata normal form. 7/3532 useless extension candidates. Maximal degree in co-relation 22579. Up to 3149 conditions per place. [2024-06-27 21:12:00,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 221 selfloop transitions, 71 changer transitions 0/297 dead transitions. [2024-06-27 21:12:00,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 297 transitions, 3959 flow [2024-06-27 21:12:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:12:00,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:12:00,124 INFO L175 Difference]: Start difference. First operand has 218 places, 252 transitions, 3051 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:12:00,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 297 transitions, 3959 flow [2024-06-27 21:12:00,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 297 transitions, 3861 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:12:00,314 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 3228 flow [2024-06-27 21:12:00,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3228, PETRI_PLACES=220, PETRI_TRANSITIONS=258} [2024-06-27 21:12:00,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 21:12:00,315 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 3228 flow [2024-06-27 21:12:00,315 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 21:12:00,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:00,315 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 21:12:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:12:00,315 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 21:12:00,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash 781291166, now seen corresponding path program 1 times [2024-06-27 21:12:00,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:00,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507889677] [2024-06-27 21:12:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:02,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:02,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507889677] [2024-06-27 21:12:02,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507889677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:02,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:02,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:12:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807013708] [2024-06-27 21:12:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:02,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:12:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:12:02,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:12:02,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:02,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 258 transitions, 3228 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:02,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:02,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:02,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:04,039 INFO L124 PetriNetUnfolderBase]: 2151/3558 cut-off events. [2024-06-27 21:12:04,039 INFO L125 PetriNetUnfolderBase]: For 208496/208502 co-relation queries the response was YES. [2024-06-27 21:12:04,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23772 conditions, 3558 events. 2151/3558 cut-off events. For 208496/208502 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20961 event pairs, 478 based on Foata normal form. 7/3560 useless extension candidates. Maximal degree in co-relation 23665. Up to 3172 conditions per place. [2024-06-27 21:12:04,073 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 73 changer transitions 0/294 dead transitions. [2024-06-27 21:12:04,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 294 transitions, 4278 flow [2024-06-27 21:12:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:12:04,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 21:12:04,075 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 3228 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:12:04,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 294 transitions, 4278 flow [2024-06-27 21:12:04,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 294 transitions, 4150 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:04,406 INFO L231 Difference]: Finished difference. Result has 222 places, 267 transitions, 3412 flow [2024-06-27 21:12:04,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3412, PETRI_PLACES=222, PETRI_TRANSITIONS=267} [2024-06-27 21:12:04,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-27 21:12:04,407 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 267 transitions, 3412 flow [2024-06-27 21:12:04,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:04,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:04,407 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 21:12:04,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:12:04,407 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 21:12:04,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 182703112, now seen corresponding path program 2 times [2024-06-27 21:12:04,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:04,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679934957] [2024-06-27 21:12:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:07,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:07,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679934957] [2024-06-27 21:12:07,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679934957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:07,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:07,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:07,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780762046] [2024-06-27 21:12:07,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:07,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:07,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:07,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:07,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:07,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 267 transitions, 3412 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 21:12:07,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:07,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:07,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:08,957 INFO L124 PetriNetUnfolderBase]: 2164/3573 cut-off events. [2024-06-27 21:12:08,957 INFO L125 PetriNetUnfolderBase]: For 217445/217447 co-relation queries the response was YES. [2024-06-27 21:12:08,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24223 conditions, 3573 events. 2164/3573 cut-off events. For 217445/217447 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20956 event pairs, 489 based on Foata normal form. 1/3568 useless extension candidates. Maximal degree in co-relation 24114. Up to 2928 conditions per place. [2024-06-27 21:12:08,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 128 changer transitions 0/307 dead transitions. [2024-06-27 21:12:08,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 307 transitions, 4538 flow [2024-06-27 21:12:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:12:08,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:12:08,988 INFO L175 Difference]: Start difference. First operand has 222 places, 267 transitions, 3412 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:12:08,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 307 transitions, 4538 flow [2024-06-27 21:12:09,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 307 transitions, 4412 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 21:12:09,313 INFO L231 Difference]: Finished difference. Result has 229 places, 276 transitions, 3833 flow [2024-06-27 21:12:09,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3286, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3833, PETRI_PLACES=229, PETRI_TRANSITIONS=276} [2024-06-27 21:12:09,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 21:12:09,314 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 276 transitions, 3833 flow [2024-06-27 21:12:09,314 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 21:12:09,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:09,314 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 21:12:09,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:12:09,314 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 21:12:09,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash -804242726, now seen corresponding path program 3 times [2024-06-27 21:12:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:09,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336211933] [2024-06-27 21:12:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:09,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:12,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:12,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336211933] [2024-06-27 21:12:12,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336211933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:12,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:12,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:12,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480618728] [2024-06-27 21:12:12,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:12,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:12,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 276 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 21:12:12,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:12,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:12,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:13,900 INFO L124 PetriNetUnfolderBase]: 2169/3582 cut-off events. [2024-06-27 21:12:13,901 INFO L125 PetriNetUnfolderBase]: For 229876/229878 co-relation queries the response was YES. [2024-06-27 21:12:13,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25412 conditions, 3582 events. 2169/3582 cut-off events. For 229876/229878 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21072 event pairs, 486 based on Foata normal form. 1/3577 useless extension candidates. Maximal degree in co-relation 25300. Up to 2932 conditions per place. [2024-06-27 21:12:13,936 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 131 changer transitions 0/306 dead transitions. [2024-06-27 21:12:13,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 306 transitions, 4855 flow [2024-06-27 21:12:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:12:13,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 21:12:13,937 INFO L175 Difference]: Start difference. First operand has 229 places, 276 transitions, 3833 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:12:13,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 306 transitions, 4855 flow [2024-06-27 21:12:14,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 306 transitions, 4680 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-27 21:12:14,327 INFO L231 Difference]: Finished difference. Result has 234 places, 279 transitions, 4000 flow [2024-06-27 21:12:14,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4000, PETRI_PLACES=234, PETRI_TRANSITIONS=279} [2024-06-27 21:12:14,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-27 21:12:14,328 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 279 transitions, 4000 flow [2024-06-27 21:12:14,328 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 21:12:14,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:14,328 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 21:12:14,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:12:14,328 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 21:12:14,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash 781411136, now seen corresponding path program 2 times [2024-06-27 21:12:14,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:14,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713346635] [2024-06-27 21:12:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:14,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:17,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:17,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713346635] [2024-06-27 21:12:17,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713346635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:17,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561061033] [2024-06-27 21:12:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:17,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:17,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 279 transitions, 4000 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 21:12:17,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:17,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:17,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:18,805 INFO L124 PetriNetUnfolderBase]: 2174/3596 cut-off events. [2024-06-27 21:12:18,805 INFO L125 PetriNetUnfolderBase]: For 234181/234187 co-relation queries the response was YES. [2024-06-27 21:12:18,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25183 conditions, 3596 events. 2174/3596 cut-off events. For 234181/234187 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21205 event pairs, 478 based on Foata normal form. 7/3598 useless extension candidates. Maximal degree in co-relation 25069. Up to 3203 conditions per place. [2024-06-27 21:12:18,840 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 77 changer transitions 0/309 dead transitions. [2024-06-27 21:12:18,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 309 transitions, 4868 flow [2024-06-27 21:12:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:12:18,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:12:18,842 INFO L175 Difference]: Start difference. First operand has 234 places, 279 transitions, 4000 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:12:18,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 309 transitions, 4868 flow [2024-06-27 21:12:19,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 309 transitions, 4609 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:19,206 INFO L231 Difference]: Finished difference. Result has 237 places, 282 transitions, 3959 flow [2024-06-27 21:12:19,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3959, PETRI_PLACES=237, PETRI_TRANSITIONS=282} [2024-06-27 21:12:19,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 21:12:19,207 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 282 transitions, 3959 flow [2024-06-27 21:12:19,207 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 21:12:19,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:19,207 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 21:12:19,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:12:19,207 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 21:12:19,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash 781411322, now seen corresponding path program 1 times [2024-06-27 21:12:19,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:19,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470763850] [2024-06-27 21:12:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:19,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:22,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:22,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470763850] [2024-06-27 21:12:22,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470763850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:22,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:22,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:22,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700105256] [2024-06-27 21:12:22,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:22,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:22,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:22,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:22,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 282 transitions, 3959 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 21:12:22,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:22,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:22,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:23,835 INFO L124 PetriNetUnfolderBase]: 2232/3676 cut-off events. [2024-06-27 21:12:23,835 INFO L125 PetriNetUnfolderBase]: For 254754/254760 co-relation queries the response was YES. [2024-06-27 21:12:23,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26089 conditions, 3676 events. 2232/3676 cut-off events. For 254754/254760 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 21639 event pairs, 482 based on Foata normal form. 8/3679 useless extension candidates. Maximal degree in co-relation 25974. Up to 3189 conditions per place. [2024-06-27 21:12:23,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 90 changer transitions 0/330 dead transitions. [2024-06-27 21:12:23,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 5277 flow [2024-06-27 21:12:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:12:23,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:12:23,874 INFO L175 Difference]: Start difference. First operand has 237 places, 282 transitions, 3959 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:12:23,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 5277 flow [2024-06-27 21:12:24,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 330 transitions, 5099 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:24,304 INFO L231 Difference]: Finished difference. Result has 243 places, 295 transitions, 4180 flow [2024-06-27 21:12:24,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4180, PETRI_PLACES=243, PETRI_TRANSITIONS=295} [2024-06-27 21:12:24,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 21:12:24,305 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 295 transitions, 4180 flow [2024-06-27 21:12:24,305 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 21:12:24,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:24,305 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 21:12:24,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:12:24,305 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 21:12:24,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash 958779992, now seen corresponding path program 2 times [2024-06-27 21:12:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:24,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432015412] [2024-06-27 21:12:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:24,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:27,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432015412] [2024-06-27 21:12:27,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432015412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:27,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:27,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:27,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446487025] [2024-06-27 21:12:27,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:27,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:27,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:27,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:27,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:27,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 295 transitions, 4180 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 21:12:27,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:27,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:27,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:28,836 INFO L124 PetriNetUnfolderBase]: 2316/3795 cut-off events. [2024-06-27 21:12:28,836 INFO L125 PetriNetUnfolderBase]: For 286752/286754 co-relation queries the response was YES. [2024-06-27 21:12:28,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28230 conditions, 3795 events. 2316/3795 cut-off events. For 286752/286754 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22272 event pairs, 477 based on Foata normal form. 4/3797 useless extension candidates. Maximal degree in co-relation 28112. Up to 3351 conditions per place. [2024-06-27 21:12:28,877 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 264 selfloop transitions, 74 changer transitions 0/343 dead transitions. [2024-06-27 21:12:28,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 343 transitions, 5544 flow [2024-06-27 21:12:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:12:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:12:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 21:12:28,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 21:12:28,879 INFO L175 Difference]: Start difference. First operand has 243 places, 295 transitions, 4180 flow. Second operand 11 states and 180 transitions. [2024-06-27 21:12:28,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 343 transitions, 5544 flow [2024-06-27 21:12:29,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 343 transitions, 5318 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:29,336 INFO L231 Difference]: Finished difference. Result has 250 places, 309 transitions, 4402 flow [2024-06-27 21:12:29,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4402, PETRI_PLACES=250, PETRI_TRANSITIONS=309} [2024-06-27 21:12:29,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 21:12:29,337 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 309 transitions, 4402 flow [2024-06-27 21:12:29,337 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 21:12:29,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:29,337 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 21:12:29,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:12:29,337 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 21:12:29,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 958542470, now seen corresponding path program 4 times [2024-06-27 21:12:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854859590] [2024-06-27 21:12:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:32,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:32,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854859590] [2024-06-27 21:12:32,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854859590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:32,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:32,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:32,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588741835] [2024-06-27 21:12:32,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:32,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:32,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:32,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 309 transitions, 4402 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 21:12:32,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:32,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:32,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:33,480 INFO L124 PetriNetUnfolderBase]: 2329/3819 cut-off events. [2024-06-27 21:12:33,480 INFO L125 PetriNetUnfolderBase]: For 290678/290680 co-relation queries the response was YES. [2024-06-27 21:12:33,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29059 conditions, 3819 events. 2329/3819 cut-off events. For 290678/290680 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22431 event pairs, 489 based on Foata normal form. 1/3818 useless extension candidates. Maximal degree in co-relation 28938. Up to 3474 conditions per place. [2024-06-27 21:12:33,518 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 58 changer transitions 0/338 dead transitions. [2024-06-27 21:12:33,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 338 transitions, 5376 flow [2024-06-27 21:12:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:12:33,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 21:12:33,524 INFO L175 Difference]: Start difference. First operand has 250 places, 309 transitions, 4402 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:12:33,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 338 transitions, 5376 flow [2024-06-27 21:12:34,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 338 transitions, 5206 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:34,043 INFO L231 Difference]: Finished difference. Result has 254 places, 315 transitions, 4487 flow [2024-06-27 21:12:34,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4232, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4487, PETRI_PLACES=254, PETRI_TRANSITIONS=315} [2024-06-27 21:12:34,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-27 21:12:34,044 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 315 transitions, 4487 flow [2024-06-27 21:12:34,044 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 21:12:34,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:34,044 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 21:12:34,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:12:34,044 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 21:12:34,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1609362516, now seen corresponding path program 3 times [2024-06-27 21:12:34,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:34,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485135861] [2024-06-27 21:12:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:34,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:36,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:36,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485135861] [2024-06-27 21:12:36,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485135861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:36,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:36,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41821528] [2024-06-27 21:12:36,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:36,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:36,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:36,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:36,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 315 transitions, 4487 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 21:12:36,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:36,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:36,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:38,453 INFO L124 PetriNetUnfolderBase]: 2317/3799 cut-off events. [2024-06-27 21:12:38,453 INFO L125 PetriNetUnfolderBase]: For 299338/299340 co-relation queries the response was YES. [2024-06-27 21:12:38,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28737 conditions, 3799 events. 2317/3799 cut-off events. For 299338/299340 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22312 event pairs, 474 based on Foata normal form. 4/3801 useless extension candidates. Maximal degree in co-relation 28613. Up to 3363 conditions per place. [2024-06-27 21:12:38,495 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/351 dead transitions. [2024-06-27 21:12:38,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 351 transitions, 5521 flow [2024-06-27 21:12:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:12:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:12:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 21:12:38,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 21:12:38,497 INFO L175 Difference]: Start difference. First operand has 254 places, 315 transitions, 4487 flow. Second operand 11 states and 180 transitions. [2024-06-27 21:12:38,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 351 transitions, 5521 flow [2024-06-27 21:12:39,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 351 transitions, 5380 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:39,142 INFO L231 Difference]: Finished difference. Result has 259 places, 319 transitions, 4615 flow [2024-06-27 21:12:39,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4615, PETRI_PLACES=259, PETRI_TRANSITIONS=319} [2024-06-27 21:12:39,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 21:12:39,142 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 319 transitions, 4615 flow [2024-06-27 21:12:39,142 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 21:12:39,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:39,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:39,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:12:39,143 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 21:12:39,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:39,143 INFO L85 PathProgramCache]: Analyzing trace with hash 958542656, now seen corresponding path program 3 times [2024-06-27 21:12:39,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:39,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720161723] [2024-06-27 21:12:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:39,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:41,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:41,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720161723] [2024-06-27 21:12:41,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720161723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:41,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:41,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:12:41,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324168474] [2024-06-27 21:12:41,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:41,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:12:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:12:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:12:41,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:41,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 319 transitions, 4615 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:41,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:41,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:41,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:42,853 INFO L124 PetriNetUnfolderBase]: 2314/3799 cut-off events. [2024-06-27 21:12:42,853 INFO L125 PetriNetUnfolderBase]: For 298585/298587 co-relation queries the response was YES. [2024-06-27 21:12:42,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28895 conditions, 3799 events. 2314/3799 cut-off events. For 298585/298587 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22364 event pairs, 485 based on Foata normal form. 1/3798 useless extension candidates. Maximal degree in co-relation 28770. Up to 3465 conditions per place. [2024-06-27 21:12:42,899 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 53 changer transitions 0/340 dead transitions. [2024-06-27 21:12:42,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 340 transitions, 5355 flow [2024-06-27 21:12:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:12:42,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 21:12:42,900 INFO L175 Difference]: Start difference. First operand has 259 places, 319 transitions, 4615 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:12:42,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 340 transitions, 5355 flow [2024-06-27 21:12:43,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 340 transitions, 5125 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-27 21:12:43,532 INFO L231 Difference]: Finished difference. Result has 259 places, 319 transitions, 4505 flow [2024-06-27 21:12:43,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4505, PETRI_PLACES=259, PETRI_TRANSITIONS=319} [2024-06-27 21:12:43,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 21:12:43,533 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 319 transitions, 4505 flow [2024-06-27 21:12:43,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:43,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:43,533 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 21:12:43,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:12:43,534 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 21:12:43,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:43,534 INFO L85 PathProgramCache]: Analyzing trace with hash 958788920, now seen corresponding path program 1 times [2024-06-27 21:12:43,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:43,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145764944] [2024-06-27 21:12:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:43,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145764944] [2024-06-27 21:12:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145764944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:46,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:46,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94066453] [2024-06-27 21:12:46,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:46,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:46,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:47,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:12:47,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 319 transitions, 4505 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 21:12:47,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:47,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:12:47,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:48,470 INFO L124 PetriNetUnfolderBase]: 2225/3697 cut-off events. [2024-06-27 21:12:48,470 INFO L125 PetriNetUnfolderBase]: For 332164/332175 co-relation queries the response was YES. [2024-06-27 21:12:48,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28336 conditions, 3697 events. 2225/3697 cut-off events. For 332164/332175 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22147 event pairs, 455 based on Foata normal form. 21/3698 useless extension candidates. Maximal degree in co-relation 28210. Up to 3194 conditions per place. [2024-06-27 21:12:48,508 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 46 changer transitions 0/348 dead transitions. [2024-06-27 21:12:48,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 348 transitions, 5241 flow [2024-06-27 21:12:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:12:48,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 21:12:48,510 INFO L175 Difference]: Start difference. First operand has 259 places, 319 transitions, 4505 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:12:48,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 348 transitions, 5241 flow [2024-06-27 21:12:48,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 348 transitions, 5135 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:12:48,992 INFO L231 Difference]: Finished difference. Result has 261 places, 320 transitions, 4515 flow [2024-06-27 21:12:48,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4399, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4515, PETRI_PLACES=261, PETRI_TRANSITIONS=320} [2024-06-27 21:12:48,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 21:12:48,993 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 320 transitions, 4515 flow [2024-06-27 21:12:48,993 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 21:12:48,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:48,994 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 21:12:48,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:12:48,994 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 21:12:48,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -566108804, now seen corresponding path program 4 times [2024-06-27 21:12:48,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:48,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569335476] [2024-06-27 21:12:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:48,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569335476] [2024-06-27 21:12:51,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569335476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:51,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:12:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196925792] [2024-06-27 21:12:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:51,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:12:51,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:51,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:12:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:12:51,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:51,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 320 transitions, 4515 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:51,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:51,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:51,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:52,965 INFO L124 PetriNetUnfolderBase]: 2363/3882 cut-off events. [2024-06-27 21:12:52,965 INFO L125 PetriNetUnfolderBase]: For 318556/318591 co-relation queries the response was YES. [2024-06-27 21:12:52,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29453 conditions, 3882 events. 2363/3882 cut-off events. For 318556/318591 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23010 event pairs, 521 based on Foata normal form. 25/3898 useless extension candidates. Maximal degree in co-relation 29326. Up to 3472 conditions per place. [2024-06-27 21:12:53,007 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 77 changer transitions 0/347 dead transitions. [2024-06-27 21:12:53,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 347 transitions, 5607 flow [2024-06-27 21:12:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:12:53,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:12:53,009 INFO L175 Difference]: Start difference. First operand has 261 places, 320 transitions, 4515 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:12:53,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 347 transitions, 5607 flow [2024-06-27 21:12:53,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 347 transitions, 5513 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:12:53,669 INFO L231 Difference]: Finished difference. Result has 261 places, 323 transitions, 4645 flow [2024-06-27 21:12:53,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4645, PETRI_PLACES=261, PETRI_TRANSITIONS=323} [2024-06-27 21:12:53,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 21:12:53,670 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 323 transitions, 4645 flow [2024-06-27 21:12:53,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:53,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:53,670 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 21:12:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:12:53,670 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 21:12:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1585586394, now seen corresponding path program 5 times [2024-06-27 21:12:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703447424] [2024-06-27 21:12:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:55,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703447424] [2024-06-27 21:12:55,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703447424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:55,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:55,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:12:55,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357389778] [2024-06-27 21:12:55,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:55,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:12:55,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:55,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:12:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:12:55,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:55,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 323 transitions, 4645 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:55,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:55,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:55,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:57,221 INFO L124 PetriNetUnfolderBase]: 2368/3885 cut-off events. [2024-06-27 21:12:57,221 INFO L125 PetriNetUnfolderBase]: For 326656/326691 co-relation queries the response was YES. [2024-06-27 21:12:57,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29637 conditions, 3885 events. 2368/3885 cut-off events. For 326656/326691 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22977 event pairs, 525 based on Foata normal form. 25/3901 useless extension candidates. Maximal degree in co-relation 29509. Up to 3478 conditions per place. [2024-06-27 21:12:57,264 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 79 changer transitions 0/345 dead transitions. [2024-06-27 21:12:57,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 345 transitions, 5591 flow [2024-06-27 21:12:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:12:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:12:57,265 INFO L175 Difference]: Start difference. First operand has 261 places, 323 transitions, 4645 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:12:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 345 transitions, 5591 flow [2024-06-27 21:12:57,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 345 transitions, 5274 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 21:12:58,000 INFO L231 Difference]: Finished difference. Result has 261 places, 326 transitions, 4562 flow [2024-06-27 21:12:58,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4562, PETRI_PLACES=261, PETRI_TRANSITIONS=326} [2024-06-27 21:12:58,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 21:12:58,000 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 326 transitions, 4562 flow [2024-06-27 21:12:58,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:58,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:58,000 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 21:12:58,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:12:58,000 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 21:12:58,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1881118966, now seen corresponding path program 5 times [2024-06-27 21:12:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:58,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840458534] [2024-06-27 21:12:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:00,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:00,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840458534] [2024-06-27 21:13:00,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840458534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:00,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:00,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:00,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346870433] [2024-06-27 21:13:00,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:00,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:00,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:00,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:00,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 326 transitions, 4562 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 21:13:00,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:00,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:00,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:02,502 INFO L124 PetriNetUnfolderBase]: 2373/3864 cut-off events. [2024-06-27 21:13:02,502 INFO L125 PetriNetUnfolderBase]: For 334099/334107 co-relation queries the response was YES. [2024-06-27 21:13:02,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29672 conditions, 3864 events. 2373/3864 cut-off events. For 334099/334107 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22670 event pairs, 575 based on Foata normal form. 2/3842 useless extension candidates. Maximal degree in co-relation 29545. Up to 3207 conditions per place. [2024-06-27 21:13:02,548 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 153 changer transitions 0/360 dead transitions. [2024-06-27 21:13:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 360 transitions, 5940 flow [2024-06-27 21:13:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:13:02,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 21:13:02,550 INFO L175 Difference]: Start difference. First operand has 261 places, 326 transitions, 4562 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:13:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 360 transitions, 5940 flow [2024-06-27 21:13:03,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 360 transitions, 5803 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:13:03,101 INFO L231 Difference]: Finished difference. Result has 265 places, 332 transitions, 4911 flow [2024-06-27 21:13:03,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4911, PETRI_PLACES=265, PETRI_TRANSITIONS=332} [2024-06-27 21:13:03,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-27 21:13:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 332 transitions, 4911 flow [2024-06-27 21:13:03,101 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 21:13:03,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:03,101 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 21:13:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:13:03,102 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 21:13:03,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash 269384048, now seen corresponding path program 4 times [2024-06-27 21:13:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:03,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700185387] [2024-06-27 21:13:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:05,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:05,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700185387] [2024-06-27 21:13:05,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700185387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:05,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:05,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:05,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565634516] [2024-06-27 21:13:05,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:05,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:05,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:05,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:05,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 332 transitions, 4911 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 21:13:05,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:05,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:05,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:07,226 INFO L124 PetriNetUnfolderBase]: 2383/3898 cut-off events. [2024-06-27 21:13:07,227 INFO L125 PetriNetUnfolderBase]: For 348191/348209 co-relation queries the response was YES. [2024-06-27 21:13:07,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30311 conditions, 3898 events. 2383/3898 cut-off events. For 348191/348209 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22998 event pairs, 525 based on Foata normal form. 14/3902 useless extension candidates. Maximal degree in co-relation 30183. Up to 3482 conditions per place. [2024-06-27 21:13:07,348 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 269 selfloop transitions, 92 changer transitions 0/366 dead transitions. [2024-06-27 21:13:07,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 366 transitions, 6145 flow [2024-06-27 21:13:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:13:07,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 21:13:07,349 INFO L175 Difference]: Start difference. First operand has 265 places, 332 transitions, 4911 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:13:07,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 366 transitions, 6145 flow [2024-06-27 21:13:08,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 366 transitions, 5875 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:08,056 INFO L231 Difference]: Finished difference. Result has 269 places, 338 transitions, 4985 flow [2024-06-27 21:13:08,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4985, PETRI_PLACES=269, PETRI_TRANSITIONS=338} [2024-06-27 21:13:08,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-27 21:13:08,057 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 338 transitions, 4985 flow [2024-06-27 21:13:08,057 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 21:13:08,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:08,057 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] [2024-06-27 21:13:08,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:13:08,057 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 21:13:08,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1111360372, now seen corresponding path program 6 times [2024-06-27 21:13:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:08,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239557532] [2024-06-27 21:13:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:08,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:11,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:11,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239557532] [2024-06-27 21:13:11,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239557532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505578527] [2024-06-27 21:13:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:11,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:11,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:11,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:11,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:11,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 338 transitions, 4985 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 21:13:11,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:11,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:12,899 INFO L124 PetriNetUnfolderBase]: 2388/3907 cut-off events. [2024-06-27 21:13:12,899 INFO L125 PetriNetUnfolderBase]: For 353625/353643 co-relation queries the response was YES. [2024-06-27 21:13:12,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30337 conditions, 3907 events. 2388/3907 cut-off events. For 353625/353643 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23048 event pairs, 523 based on Foata normal form. 13/3910 useless extension candidates. Maximal degree in co-relation 30208. Up to 3505 conditions per place. [2024-06-27 21:13:12,947 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 89 changer transitions 0/365 dead transitions. [2024-06-27 21:13:12,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 365 transitions, 5986 flow [2024-06-27 21:13:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:13:12,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:13:12,948 INFO L175 Difference]: Start difference. First operand has 269 places, 338 transitions, 4985 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:13:12,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 365 transitions, 5986 flow [2024-06-27 21:13:13,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 365 transitions, 5798 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:13,630 INFO L231 Difference]: Finished difference. Result has 272 places, 341 transitions, 5046 flow [2024-06-27 21:13:13,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4800, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5046, PETRI_PLACES=272, PETRI_TRANSITIONS=341} [2024-06-27 21:13:13,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 21:13:13,630 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 341 transitions, 5046 flow [2024-06-27 21:13:13,630 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 21:13:13,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:13,630 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 21:13:13,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:13:13,631 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 21:13:13,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1256879502, now seen corresponding path program 6 times [2024-06-27 21:13:13,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:13,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562276316] [2024-06-27 21:13:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:13,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:16,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562276316] [2024-06-27 21:13:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562276316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:16,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:16,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918494221] [2024-06-27 21:13:16,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:16,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:16,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:16,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 341 transitions, 5046 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 21:13:16,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:16,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:16,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:18,059 INFO L124 PetriNetUnfolderBase]: 2393/3895 cut-off events. [2024-06-27 21:13:18,060 INFO L125 PetriNetUnfolderBase]: For 362284/362292 co-relation queries the response was YES. [2024-06-27 21:13:18,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30557 conditions, 3895 events. 2393/3895 cut-off events. For 362284/362292 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22790 event pairs, 582 based on Foata normal form. 2/3873 useless extension candidates. Maximal degree in co-relation 30426. Up to 3229 conditions per place. [2024-06-27 21:13:18,106 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 156 changer transitions 0/368 dead transitions. [2024-06-27 21:13:18,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 368 transitions, 6336 flow [2024-06-27 21:13:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:13:18,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:13:18,108 INFO L175 Difference]: Start difference. First operand has 272 places, 341 transitions, 5046 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:13:18,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 368 transitions, 6336 flow [2024-06-27 21:13:19,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 368 transitions, 6200 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:19,074 INFO L231 Difference]: Finished difference. Result has 275 places, 344 transitions, 5290 flow [2024-06-27 21:13:19,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5290, PETRI_PLACES=275, PETRI_TRANSITIONS=344} [2024-06-27 21:13:19,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 21:13:19,075 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 344 transitions, 5290 flow [2024-06-27 21:13:19,075 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 21:13:19,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:19,075 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 21:13:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:13:19,075 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 21:13:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash -439211048, now seen corresponding path program 5 times [2024-06-27 21:13:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236924138] [2024-06-27 21:13:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:19,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:21,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:21,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236924138] [2024-06-27 21:13:21,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236924138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:21,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:21,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:21,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84551616] [2024-06-27 21:13:21,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:21,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:21,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:21,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:21,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:21,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 344 transitions, 5290 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 21:13:21,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:21,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:21,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:23,219 INFO L124 PetriNetUnfolderBase]: 2419/3946 cut-off events. [2024-06-27 21:13:23,219 INFO L125 PetriNetUnfolderBase]: For 382457/382475 co-relation queries the response was YES. [2024-06-27 21:13:23,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31426 conditions, 3946 events. 2419/3946 cut-off events. For 382457/382475 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23217 event pairs, 534 based on Foata normal form. 14/3950 useless extension candidates. Maximal degree in co-relation 31293. Up to 3269 conditions per place. [2024-06-27 21:13:23,260 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 128 changer transitions 0/384 dead transitions. [2024-06-27 21:13:23,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 384 transitions, 6816 flow [2024-06-27 21:13:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:13:23,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:13:23,261 INFO L175 Difference]: Start difference. First operand has 275 places, 344 transitions, 5290 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:13:23,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 384 transitions, 6816 flow [2024-06-27 21:13:24,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 384 transitions, 6479 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:24,130 INFO L231 Difference]: Finished difference. Result has 279 places, 358 transitions, 5569 flow [2024-06-27 21:13:24,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5569, PETRI_PLACES=279, PETRI_TRANSITIONS=358} [2024-06-27 21:13:24,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 21:13:24,130 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 358 transitions, 5569 flow [2024-06-27 21:13:24,130 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 21:13:24,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:24,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:24,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:13:24,131 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 21:13:24,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1196177604, now seen corresponding path program 7 times [2024-06-27 21:13:24,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:24,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435253863] [2024-06-27 21:13:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:24,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:26,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:26,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435253863] [2024-06-27 21:13:26,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435253863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:26,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:26,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:26,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510027461] [2024-06-27 21:13:26,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:26,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:26,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:26,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 358 transitions, 5569 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 21:13:26,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:26,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:28,457 INFO L124 PetriNetUnfolderBase]: 2424/3936 cut-off events. [2024-06-27 21:13:28,457 INFO L125 PetriNetUnfolderBase]: For 392492/392500 co-relation queries the response was YES. [2024-06-27 21:13:28,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32123 conditions, 3936 events. 2424/3936 cut-off events. For 392492/392500 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23035 event pairs, 572 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 31988. Up to 3269 conditions per place. [2024-06-27 21:13:28,501 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 213 selfloop transitions, 162 changer transitions 0/380 dead transitions. [2024-06-27 21:13:28,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 380 transitions, 6734 flow [2024-06-27 21:13:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:13:28,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:13:28,502 INFO L175 Difference]: Start difference. First operand has 279 places, 358 transitions, 5569 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:13:28,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 380 transitions, 6734 flow [2024-06-27 21:13:29,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 380 transitions, 6644 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 21:13:29,410 INFO L231 Difference]: Finished difference. Result has 285 places, 361 transitions, 5874 flow [2024-06-27 21:13:29,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5479, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5874, PETRI_PLACES=285, PETRI_TRANSITIONS=361} [2024-06-27 21:13:29,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 21:13:29,411 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 361 transitions, 5874 flow [2024-06-27 21:13:29,411 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 21:13:29,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:29,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:29,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:13:29,412 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 21:13:29,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1504998698, now seen corresponding path program 7 times [2024-06-27 21:13:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:29,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449593768] [2024-06-27 21:13:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:29,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:31,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:31,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449593768] [2024-06-27 21:13:31,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449593768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:31,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:31,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179737758] [2024-06-27 21:13:31,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:31,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:31,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:31,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:31,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 361 transitions, 5874 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 21:13:31,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:31,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:31,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:33,520 INFO L124 PetriNetUnfolderBase]: 2421/3956 cut-off events. [2024-06-27 21:13:33,520 INFO L125 PetriNetUnfolderBase]: For 397309/397327 co-relation queries the response was YES. [2024-06-27 21:13:33,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32303 conditions, 3956 events. 2421/3956 cut-off events. For 397309/397327 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23353 event pairs, 520 based on Foata normal form. 13/3959 useless extension candidates. Maximal degree in co-relation 32165. Up to 3552 conditions per place. [2024-06-27 21:13:33,567 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 89 changer transitions 0/382 dead transitions. [2024-06-27 21:13:33,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 382 transitions, 6994 flow [2024-06-27 21:13:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:13:33,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:13:33,569 INFO L175 Difference]: Start difference. First operand has 285 places, 361 transitions, 5874 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:13:33,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 382 transitions, 6994 flow [2024-06-27 21:13:34,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 382 transitions, 6688 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:34,579 INFO L231 Difference]: Finished difference. Result has 288 places, 361 transitions, 5752 flow [2024-06-27 21:13:34,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5752, PETRI_PLACES=288, PETRI_TRANSITIONS=361} [2024-06-27 21:13:34,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-27 21:13:34,579 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 361 transitions, 5752 flow [2024-06-27 21:13:34,579 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 21:13:34,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:34,579 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 21:13:34,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:13:34,579 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 21:13:34,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash -439626758, now seen corresponding path program 6 times [2024-06-27 21:13:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:34,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462229939] [2024-06-27 21:13:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:37,034 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 21:13:37,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:37,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462229939] [2024-06-27 21:13:37,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462229939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:37,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:37,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592468821] [2024-06-27 21:13:37,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:37,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:37,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:37,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:37,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 361 transitions, 5752 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 21:13:37,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:37,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:37,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:38,582 INFO L124 PetriNetUnfolderBase]: 2415/3948 cut-off events. [2024-06-27 21:13:38,582 INFO L125 PetriNetUnfolderBase]: For 402007/402025 co-relation queries the response was YES. [2024-06-27 21:13:38,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31978 conditions, 3948 events. 2415/3948 cut-off events. For 402007/402025 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23328 event pairs, 528 based on Foata normal form. 14/3952 useless extension candidates. Maximal degree in co-relation 31839. Up to 3538 conditions per place. [2024-06-27 21:13:38,627 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 92 changer transitions 0/382 dead transitions. [2024-06-27 21:13:38,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 382 transitions, 6722 flow [2024-06-27 21:13:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:13:38,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:13:38,628 INFO L175 Difference]: Start difference. First operand has 288 places, 361 transitions, 5752 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:13:38,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 382 transitions, 6722 flow [2024-06-27 21:13:39,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 382 transitions, 6492 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:39,630 INFO L231 Difference]: Finished difference. Result has 291 places, 361 transitions, 5712 flow [2024-06-27 21:13:39,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5712, PETRI_PLACES=291, PETRI_TRANSITIONS=361} [2024-06-27 21:13:39,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 21:13:39,631 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 361 transitions, 5712 flow [2024-06-27 21:13:39,631 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 21:13:39,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:39,631 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 21:13:39,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:13:39,631 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 21:13:39,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash 32982996, now seen corresponding path program 8 times [2024-06-27 21:13:39,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:39,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922450750] [2024-06-27 21:13:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:39,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922450750] [2024-06-27 21:13:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922450750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:42,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:42,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:42,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487678209] [2024-06-27 21:13:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:42,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:42,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:42,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:42,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 361 transitions, 5712 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 21:13:42,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:42,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:42,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:44,496 INFO L124 PetriNetUnfolderBase]: 2412/3948 cut-off events. [2024-06-27 21:13:44,496 INFO L125 PetriNetUnfolderBase]: For 405386/405404 co-relation queries the response was YES. [2024-06-27 21:13:44,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31814 conditions, 3948 events. 2412/3948 cut-off events. For 405386/405404 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23330 event pairs, 523 based on Foata normal form. 13/3951 useless extension candidates. Maximal degree in co-relation 31674. Up to 3541 conditions per place. [2024-06-27 21:13:44,536 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 90 changer transitions 0/383 dead transitions. [2024-06-27 21:13:44,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 383 transitions, 6688 flow [2024-06-27 21:13:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:13:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:13:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:13:44,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 21:13:44,538 INFO L175 Difference]: Start difference. First operand has 291 places, 361 transitions, 5712 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:13:44,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 383 transitions, 6688 flow [2024-06-27 21:13:45,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 383 transitions, 6478 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:45,503 INFO L231 Difference]: Finished difference. Result has 294 places, 361 transitions, 5688 flow [2024-06-27 21:13:45,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5688, PETRI_PLACES=294, PETRI_TRANSITIONS=361} [2024-06-27 21:13:45,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 21:13:45,504 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 361 transitions, 5688 flow [2024-06-27 21:13:45,504 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 21:13:45,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:45,504 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 21:13:45,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:13:45,504 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 21:13:45,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash -237041516, now seen corresponding path program 9 times [2024-06-27 21:13:45,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:45,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817312358] [2024-06-27 21:13:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:45,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:47,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:47,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817312358] [2024-06-27 21:13:47,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817312358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:47,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:47,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707209735] [2024-06-27 21:13:47,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:47,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:47,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:47,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 361 transitions, 5688 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:47,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:47,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:47,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:49,053 INFO L124 PetriNetUnfolderBase]: 2409/3945 cut-off events. [2024-06-27 21:13:49,053 INFO L125 PetriNetUnfolderBase]: For 410275/410283 co-relation queries the response was YES. [2024-06-27 21:13:49,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31790 conditions, 3945 events. 2409/3945 cut-off events. For 410275/410283 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23274 event pairs, 516 based on Foata normal form. 2/3935 useless extension candidates. Maximal degree in co-relation 31649. Up to 3450 conditions per place. [2024-06-27 21:13:49,095 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 101 changer transitions 0/386 dead transitions. [2024-06-27 21:13:49,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 386 transitions, 6678 flow [2024-06-27 21:13:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:13:49,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 21:13:49,096 INFO L175 Difference]: Start difference. First operand has 294 places, 361 transitions, 5688 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:13:49,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 386 transitions, 6678 flow [2024-06-27 21:13:50,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 386 transitions, 6410 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 21:13:50,147 INFO L231 Difference]: Finished difference. Result has 291 places, 361 transitions, 5632 flow [2024-06-27 21:13:50,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5632, PETRI_PLACES=291, PETRI_TRANSITIONS=361} [2024-06-27 21:13:50,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 21:13:50,148 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 361 transitions, 5632 flow [2024-06-27 21:13:50,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:50,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:50,148 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 21:13:50,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:13:50,148 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 21:13:50,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 521304542, now seen corresponding path program 10 times [2024-06-27 21:13:50,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:50,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988128419] [2024-06-27 21:13:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:50,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:52,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:52,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988128419] [2024-06-27 21:13:52,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988128419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:52,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:52,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:13:52,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641486234] [2024-06-27 21:13:52,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:52,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:13:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:13:52,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:13:52,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:52,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 361 transitions, 5632 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:52,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:52,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:52,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:54,319 INFO L124 PetriNetUnfolderBase]: 2406/3943 cut-off events. [2024-06-27 21:13:54,319 INFO L125 PetriNetUnfolderBase]: For 414128/414130 co-relation queries the response was YES. [2024-06-27 21:13:54,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31829 conditions, 3943 events. 2406/3943 cut-off events. For 414128/414130 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23279 event pairs, 498 based on Foata normal form. 1/3942 useless extension candidates. Maximal degree in co-relation 31688. Up to 3447 conditions per place. [2024-06-27 21:13:54,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 103 changer transitions 0/393 dead transitions. [2024-06-27 21:13:54,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 393 transitions, 6498 flow [2024-06-27 21:13:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:13:54,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 21:13:54,370 INFO L175 Difference]: Start difference. First operand has 291 places, 361 transitions, 5632 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:13:54,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 393 transitions, 6498 flow [2024-06-27 21:13:55,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 393 transitions, 6222 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 21:13:55,408 INFO L231 Difference]: Finished difference. Result has 291 places, 361 transitions, 5598 flow [2024-06-27 21:13:55,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5356, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5598, PETRI_PLACES=291, PETRI_TRANSITIONS=361} [2024-06-27 21:13:55,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 21:13:55,409 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 361 transitions, 5598 flow [2024-06-27 21:13:55,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:55,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:55,409 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 21:13:55,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:13:55,409 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 21:13:55,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 743907668, now seen corresponding path program 7 times [2024-06-27 21:13:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:55,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178867738] [2024-06-27 21:13:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:55,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:58,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:58,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178867738] [2024-06-27 21:13:58,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178867738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:58,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:58,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479433617] [2024-06-27 21:13:58,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:58,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:58,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:58,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:58,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:58,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 361 transitions, 5598 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 21:13:58,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:58,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:58,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:59,940 INFO L124 PetriNetUnfolderBase]: 2506/4091 cut-off events. [2024-06-27 21:13:59,940 INFO L125 PetriNetUnfolderBase]: For 452382/452390 co-relation queries the response was YES. [2024-06-27 21:13:59,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33783 conditions, 4091 events. 2506/4091 cut-off events. For 452382/452390 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24188 event pairs, 491 based on Foata normal form. 5/4084 useless extension candidates. Maximal degree in co-relation 33642. Up to 3287 conditions per place. [2024-06-27 21:13:59,990 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 250 selfloop transitions, 153 changer transitions 0/408 dead transitions. [2024-06-27 21:13:59,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 408 transitions, 7201 flow [2024-06-27 21:13:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:13:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:13:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:13:59,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:13:59,991 INFO L175 Difference]: Start difference. First operand has 291 places, 361 transitions, 5598 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:13:59,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 408 transitions, 7201 flow [2024-06-27 21:14:01,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 408 transitions, 6886 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 21:14:01,121 INFO L231 Difference]: Finished difference. Result has 292 places, 379 transitions, 6034 flow [2024-06-27 21:14:01,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6034, PETRI_PLACES=292, PETRI_TRANSITIONS=379} [2024-06-27 21:14:01,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 21:14:01,121 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 379 transitions, 6034 flow [2024-06-27 21:14:01,121 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 21:14:01,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:01,121 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 21:14:01,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:14:01,122 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 21:14:01,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash 344173208, now seen corresponding path program 8 times [2024-06-27 21:14:01,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:01,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162465495] [2024-06-27 21:14:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:01,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:03,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162465495] [2024-06-27 21:14:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162465495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:03,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:03,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365258471] [2024-06-27 21:14:03,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:03,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:03,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:03,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:03,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 379 transitions, 6034 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 21:14:03,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:03,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:03,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:05,704 INFO L124 PetriNetUnfolderBase]: 2604/4233 cut-off events. [2024-06-27 21:14:05,704 INFO L125 PetriNetUnfolderBase]: For 456867/456869 co-relation queries the response was YES. [2024-06-27 21:14:05,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35860 conditions, 4233 events. 2604/4233 cut-off events. For 456867/456869 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25032 event pairs, 510 based on Foata normal form. 4/4235 useless extension candidates. Maximal degree in co-relation 35719. Up to 3536 conditions per place. [2024-06-27 21:14:05,755 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 150 changer transitions 0/444 dead transitions. [2024-06-27 21:14:05,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 444 transitions, 7773 flow [2024-06-27 21:14:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 21:14:05,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-27 21:14:05,756 INFO L175 Difference]: Start difference. First operand has 292 places, 379 transitions, 6034 flow. Second operand 11 states and 195 transitions. [2024-06-27 21:14:05,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 444 transitions, 7773 flow [2024-06-27 21:14:06,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 444 transitions, 7404 flow, removed 117 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:06,877 INFO L231 Difference]: Finished difference. Result has 300 places, 404 transitions, 6524 flow [2024-06-27 21:14:06,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5705, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6524, PETRI_PLACES=300, PETRI_TRANSITIONS=404} [2024-06-27 21:14:06,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 21:14:06,878 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 404 transitions, 6524 flow [2024-06-27 21:14:06,878 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 21:14:06,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:06,878 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 21:14:06,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:14:06,878 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 21:14:06,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash 344172836, now seen corresponding path program 8 times [2024-06-27 21:14:06,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:06,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410734111] [2024-06-27 21:14:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:06,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:09,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:09,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410734111] [2024-06-27 21:14:09,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410734111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:09,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:09,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:09,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010530314] [2024-06-27 21:14:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:09,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:09,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:09,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:09,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 404 transitions, 6524 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 21:14:09,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:09,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:09,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:11,635 INFO L124 PetriNetUnfolderBase]: 2609/4250 cut-off events. [2024-06-27 21:14:11,635 INFO L125 PetriNetUnfolderBase]: For 458766/458768 co-relation queries the response was YES. [2024-06-27 21:14:11,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36335 conditions, 4250 events. 2609/4250 cut-off events. For 458766/458768 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25209 event pairs, 533 based on Foata normal form. 1/4249 useless extension candidates. Maximal degree in co-relation 36190. Up to 3635 conditions per place. [2024-06-27 21:14:11,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 125 changer transitions 0/445 dead transitions. [2024-06-27 21:14:11,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 445 transitions, 7729 flow [2024-06-27 21:14:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:14:11,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:14:11,690 INFO L175 Difference]: Start difference. First operand has 300 places, 404 transitions, 6524 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:14:11,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 445 transitions, 7729 flow [2024-06-27 21:14:12,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 445 transitions, 7471 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:12,783 INFO L231 Difference]: Finished difference. Result has 304 places, 407 transitions, 6661 flow [2024-06-27 21:14:12,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6661, PETRI_PLACES=304, PETRI_TRANSITIONS=407} [2024-06-27 21:14:12,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 21:14:12,784 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 407 transitions, 6661 flow [2024-06-27 21:14:12,784 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 21:14:12,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:12,784 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 21:14:12,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:14:12,784 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 21:14:12,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash 521304356, now seen corresponding path program 9 times [2024-06-27 21:14:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848971199] [2024-06-27 21:14:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848971199] [2024-06-27 21:14:15,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848971199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:15,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:15,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438823545] [2024-06-27 21:14:15,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:15,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:15,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:15,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:15,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 407 transitions, 6661 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 21:14:15,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:15,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:15,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:17,127 INFO L124 PetriNetUnfolderBase]: 2606/4240 cut-off events. [2024-06-27 21:14:17,127 INFO L125 PetriNetUnfolderBase]: For 467140/467148 co-relation queries the response was YES. [2024-06-27 21:14:17,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36629 conditions, 4240 events. 2606/4240 cut-off events. For 467140/467148 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25135 event pairs, 548 based on Foata normal form. 2/4230 useless extension candidates. Maximal degree in co-relation 36481. Up to 3633 conditions per place. [2024-06-27 21:14:17,180 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 126 changer transitions 0/437 dead transitions. [2024-06-27 21:14:17,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 437 transitions, 7769 flow [2024-06-27 21:14:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:14:17,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:14:17,181 INFO L175 Difference]: Start difference. First operand has 304 places, 407 transitions, 6661 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:14:17,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 437 transitions, 7769 flow [2024-06-27 21:14:18,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 437 transitions, 7485 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:18,255 INFO L231 Difference]: Finished difference. Result has 304 places, 407 transitions, 6641 flow [2024-06-27 21:14:18,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6641, PETRI_PLACES=304, PETRI_TRANSITIONS=407} [2024-06-27 21:14:18,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 21:14:18,256 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 407 transitions, 6641 flow [2024-06-27 21:14:18,256 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 21:14:18,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:18,256 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 21:14:18,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:14:18,256 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 21:14:18,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -230606660, now seen corresponding path program 9 times [2024-06-27 21:14:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514340041] [2024-06-27 21:14:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:20,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514340041] [2024-06-27 21:14:20,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514340041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:20,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:20,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:20,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504284159] [2024-06-27 21:14:20,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:20,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:20,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:20,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:20,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 407 transitions, 6641 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 21:14:20,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:20,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:20,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:22,300 INFO L124 PetriNetUnfolderBase]: 2616/4269 cut-off events. [2024-06-27 21:14:22,300 INFO L125 PetriNetUnfolderBase]: For 468059/468067 co-relation queries the response was YES. [2024-06-27 21:14:22,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36779 conditions, 4269 events. 2616/4269 cut-off events. For 468059/468067 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25407 event pairs, 499 based on Foata normal form. 3/4260 useless extension candidates. Maximal degree in co-relation 36630. Up to 3365 conditions per place. [2024-06-27 21:14:22,357 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 181 changer transitions 0/438 dead transitions. [2024-06-27 21:14:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 438 transitions, 8061 flow [2024-06-27 21:14:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:14:22,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 21:14:22,358 INFO L175 Difference]: Start difference. First operand has 304 places, 407 transitions, 6641 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:14:22,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 438 transitions, 8061 flow [2024-06-27 21:14:23,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 438 transitions, 7789 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:23,496 INFO L231 Difference]: Finished difference. Result has 306 places, 413 transitions, 6932 flow [2024-06-27 21:14:23,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6932, PETRI_PLACES=306, PETRI_TRANSITIONS=413} [2024-06-27 21:14:23,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 21:14:23,496 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 413 transitions, 6932 flow [2024-06-27 21:14:23,497 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 21:14:23,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:23,497 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 21:14:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:14:23,497 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 21:14:23,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1432197506, now seen corresponding path program 10 times [2024-06-27 21:14:23,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378387345] [2024-06-27 21:14:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378387345] [2024-06-27 21:14:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378387345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989470206] [2024-06-27 21:14:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:26,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:26,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:26,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 413 transitions, 6932 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 21:14:26,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:26,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:26,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:28,196 INFO L124 PetriNetUnfolderBase]: 2604/4240 cut-off events. [2024-06-27 21:14:28,196 INFO L125 PetriNetUnfolderBase]: For 477224/477226 co-relation queries the response was YES. [2024-06-27 21:14:28,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36779 conditions, 4240 events. 2604/4240 cut-off events. For 477224/477226 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25156 event pairs, 518 based on Foata normal form. 4/4242 useless extension candidates. Maximal degree in co-relation 36628. Up to 3547 conditions per place. [2024-06-27 21:14:28,245 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 302 selfloop transitions, 138 changer transitions 0/445 dead transitions. [2024-06-27 21:14:28,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 445 transitions, 8060 flow [2024-06-27 21:14:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:14:28,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:14:28,246 INFO L175 Difference]: Start difference. First operand has 306 places, 413 transitions, 6932 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:14:28,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 445 transitions, 8060 flow [2024-06-27 21:14:29,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 445 transitions, 7665 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:29,344 INFO L231 Difference]: Finished difference. Result has 310 places, 413 transitions, 6831 flow [2024-06-27 21:14:29,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6537, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6831, PETRI_PLACES=310, PETRI_TRANSITIONS=413} [2024-06-27 21:14:29,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 21:14:29,345 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 413 transitions, 6831 flow [2024-06-27 21:14:29,345 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 21:14:29,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:29,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:29,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:14:29,346 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 21:14:29,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash 521720438, now seen corresponding path program 11 times [2024-06-27 21:14:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:29,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597468534] [2024-06-27 21:14:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:29,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:31,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:31,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597468534] [2024-06-27 21:14:31,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597468534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:31,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:31,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:31,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104465267] [2024-06-27 21:14:31,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:31,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:31,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:31,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:31,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:31,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 413 transitions, 6831 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 21:14:31,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:31,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:31,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:33,343 INFO L124 PetriNetUnfolderBase]: 2598/4242 cut-off events. [2024-06-27 21:14:33,343 INFO L125 PetriNetUnfolderBase]: For 474796/474804 co-relation queries the response was YES. [2024-06-27 21:14:33,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36402 conditions, 4242 events. 2598/4242 cut-off events. For 474796/474804 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25246 event pairs, 514 based on Foata normal form. 3/4233 useless extension candidates. Maximal degree in co-relation 36250. Up to 3356 conditions per place. [2024-06-27 21:14:33,397 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 185 changer transitions 0/443 dead transitions. [2024-06-27 21:14:33,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 443 transitions, 8292 flow [2024-06-27 21:14:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:14:33,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 21:14:33,399 INFO L175 Difference]: Start difference. First operand has 310 places, 413 transitions, 6831 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:14:33,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 443 transitions, 8292 flow [2024-06-27 21:14:34,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 443 transitions, 8016 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:34,733 INFO L231 Difference]: Finished difference. Result has 310 places, 413 transitions, 6931 flow [2024-06-27 21:14:34,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6555, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6931, PETRI_PLACES=310, PETRI_TRANSITIONS=413} [2024-06-27 21:14:34,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 21:14:34,733 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 413 transitions, 6931 flow [2024-06-27 21:14:34,734 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 21:14:34,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:34,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:34,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:14:34,734 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 21:14:34,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1201201500, now seen corresponding path program 12 times [2024-06-27 21:14:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:34,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141458671] [2024-06-27 21:14:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141458671] [2024-06-27 21:14:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141458671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:37,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:37,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433391830] [2024-06-27 21:14:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:37,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:37,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 413 transitions, 6931 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 21:14:37,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:37,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:37,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:38,718 INFO L124 PetriNetUnfolderBase]: 2592/4226 cut-off events. [2024-06-27 21:14:38,718 INFO L125 PetriNetUnfolderBase]: For 479313/479321 co-relation queries the response was YES. [2024-06-27 21:14:38,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36471 conditions, 4226 events. 2592/4226 cut-off events. For 479313/479321 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25084 event pairs, 546 based on Foata normal form. 3/4217 useless extension candidates. Maximal degree in co-relation 36318. Up to 3700 conditions per place. [2024-06-27 21:14:38,775 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 330 selfloop transitions, 104 changer transitions 0/439 dead transitions. [2024-06-27 21:14:38,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 439 transitions, 7871 flow [2024-06-27 21:14:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:14:38,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 21:14:38,776 INFO L175 Difference]: Start difference. First operand has 310 places, 413 transitions, 6931 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:14:38,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 439 transitions, 7871 flow [2024-06-27 21:14:39,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 439 transitions, 7514 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 21:14:39,985 INFO L231 Difference]: Finished difference. Result has 314 places, 413 transitions, 6788 flow [2024-06-27 21:14:39,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6574, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6788, PETRI_PLACES=314, PETRI_TRANSITIONS=413} [2024-06-27 21:14:39,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 21:14:39,985 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 413 transitions, 6788 flow [2024-06-27 21:14:39,985 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 21:14:39,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:39,986 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 21:14:39,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:14:39,986 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 21:14:39,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash 757726166, now seen corresponding path program 2 times [2024-06-27 21:14:39,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:39,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95316527] [2024-06-27 21:14:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:43,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:43,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95316527] [2024-06-27 21:14:43,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95316527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:43,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:43,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862935188] [2024-06-27 21:14:43,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:43,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:43,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:43,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:14:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 413 transitions, 6788 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 21:14:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:14:43,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:44,884 INFO L124 PetriNetUnfolderBase]: 2491/4107 cut-off events. [2024-06-27 21:14:44,884 INFO L125 PetriNetUnfolderBase]: For 521660/521678 co-relation queries the response was YES. [2024-06-27 21:14:44,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35523 conditions, 4107 events. 2491/4107 cut-off events. For 521660/521678 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24881 event pairs, 467 based on Foata normal form. 23/4084 useless extension candidates. Maximal degree in co-relation 35369. Up to 3525 conditions per place. [2024-06-27 21:14:44,942 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 326 selfloop transitions, 56 changer transitions 0/433 dead transitions. [2024-06-27 21:14:44,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 433 transitions, 7648 flow [2024-06-27 21:14:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:14:44,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:14:44,943 INFO L175 Difference]: Start difference. First operand has 314 places, 413 transitions, 6788 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:14:44,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 433 transitions, 7648 flow [2024-06-27 21:14:46,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 433 transitions, 7407 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:46,159 INFO L231 Difference]: Finished difference. Result has 313 places, 414 transitions, 6685 flow [2024-06-27 21:14:46,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6685, PETRI_PLACES=313, PETRI_TRANSITIONS=414} [2024-06-27 21:14:46,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 21:14:46,159 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 414 transitions, 6685 flow [2024-06-27 21:14:46,159 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 21:14:46,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:46,160 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 21:14:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:14:46,160 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 21:14:46,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash 758201396, now seen corresponding path program 3 times [2024-06-27 21:14:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:46,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957009256] [2024-06-27 21:14:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957009256] [2024-06-27 21:14:49,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957009256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:49,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:49,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:49,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838155932] [2024-06-27 21:14:49,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:49,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:49,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:14:49,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 414 transitions, 6685 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 21:14:49,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:49,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:14:49,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:50,878 INFO L124 PetriNetUnfolderBase]: 2564/4219 cut-off events. [2024-06-27 21:14:50,878 INFO L125 PetriNetUnfolderBase]: For 548569/548587 co-relation queries the response was YES. [2024-06-27 21:14:50,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36939 conditions, 4219 events. 2564/4219 cut-off events. For 548569/548587 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25582 event pairs, 477 based on Foata normal form. 19/4195 useless extension candidates. Maximal degree in co-relation 36784. Up to 3472 conditions per place. [2024-06-27 21:14:50,931 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 327 selfloop transitions, 60 changer transitions 0/438 dead transitions. [2024-06-27 21:14:50,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 438 transitions, 7769 flow [2024-06-27 21:14:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:14:50,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:14:50,932 INFO L175 Difference]: Start difference. First operand has 313 places, 414 transitions, 6685 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:14:50,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 438 transitions, 7769 flow [2024-06-27 21:14:52,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 438 transitions, 7653 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:52,442 INFO L231 Difference]: Finished difference. Result has 315 places, 416 transitions, 6735 flow [2024-06-27 21:14:52,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6735, PETRI_PLACES=315, PETRI_TRANSITIONS=416} [2024-06-27 21:14:52,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 21:14:52,443 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 416 transitions, 6735 flow [2024-06-27 21:14:52,443 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 21:14:52,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:52,443 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 21:14:52,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:14:52,443 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 21:14:52,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:52,444 INFO L85 PathProgramCache]: Analyzing trace with hash 344419286, now seen corresponding path program 4 times [2024-06-27 21:14:52,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:52,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758345327] [2024-06-27 21:14:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:52,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:55,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:55,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758345327] [2024-06-27 21:14:55,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758345327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:55,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:55,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975903762] [2024-06-27 21:14:55,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:55,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:55,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:14:55,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 416 transitions, 6735 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 21:14:55,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:55,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:14:55,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:57,159 INFO L124 PetriNetUnfolderBase]: 2530/4177 cut-off events. [2024-06-27 21:14:57,159 INFO L125 PetriNetUnfolderBase]: For 532029/532044 co-relation queries the response was YES. [2024-06-27 21:14:57,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35814 conditions, 4177 events. 2530/4177 cut-off events. For 532029/532044 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25425 event pairs, 500 based on Foata normal form. 21/4168 useless extension candidates. Maximal degree in co-relation 35658. Up to 3551 conditions per place. [2024-06-27 21:14:57,216 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 339 selfloop transitions, 51 changer transitions 0/441 dead transitions. [2024-06-27 21:14:57,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 441 transitions, 7611 flow [2024-06-27 21:14:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:14:57,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:14:57,217 INFO L175 Difference]: Start difference. First operand has 315 places, 416 transitions, 6735 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:14:57,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 441 transitions, 7611 flow [2024-06-27 21:14:58,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 441 transitions, 7532 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:58,629 INFO L231 Difference]: Finished difference. Result has 319 places, 416 transitions, 6772 flow [2024-06-27 21:14:58,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6656, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6772, PETRI_PLACES=319, PETRI_TRANSITIONS=416} [2024-06-27 21:14:58,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 21:14:58,629 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 416 transitions, 6772 flow [2024-06-27 21:14:58,629 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 21:14:58,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:58,629 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 21:14:58,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:14:58,629 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 21:14:58,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash 505744850, now seen corresponding path program 1 times [2024-06-27 21:14:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:58,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680325638] [2024-06-27 21:14:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:00,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:00,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680325638] [2024-06-27 21:15:00,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680325638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:00,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:00,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409372429] [2024-06-27 21:15:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:00,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:00,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:00,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:00,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:00,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 416 transitions, 6772 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:00,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:00,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:00,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:01,891 INFO L124 PetriNetUnfolderBase]: 2690/4395 cut-off events. [2024-06-27 21:15:01,891 INFO L125 PetriNetUnfolderBase]: For 506699/506707 co-relation queries the response was YES. [2024-06-27 21:15:01,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37260 conditions, 4395 events. 2690/4395 cut-off events. For 506699/506707 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26441 event pairs, 531 based on Foata normal form. 6/4398 useless extension candidates. Maximal degree in co-relation 37102. Up to 4048 conditions per place. [2024-06-27 21:15:01,951 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 408 selfloop transitions, 30 changer transitions 0/443 dead transitions. [2024-06-27 21:15:01,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 443 transitions, 7948 flow [2024-06-27 21:15:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:15:01,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 21:15:01,952 INFO L175 Difference]: Start difference. First operand has 319 places, 416 transitions, 6772 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:15:01,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 443 transitions, 7948 flow [2024-06-27 21:15:03,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 443 transitions, 7835 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:03,246 INFO L231 Difference]: Finished difference. Result has 320 places, 420 transitions, 6792 flow [2024-06-27 21:15:03,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6659, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6792, PETRI_PLACES=320, PETRI_TRANSITIONS=420} [2024-06-27 21:15:03,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 21:15:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 420 transitions, 6792 flow [2024-06-27 21:15:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:03,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:03,246 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 21:15:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:15:03,246 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 21:15:03,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1585595322, now seen corresponding path program 2 times [2024-06-27 21:15:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:03,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405670801] [2024-06-27 21:15:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:03,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:05,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405670801] [2024-06-27 21:15:05,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405670801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:05,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:05,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359014498] [2024-06-27 21:15:05,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:05,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:05,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:05,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 420 transitions, 6792 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:05,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:05,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:05,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:06,723 INFO L124 PetriNetUnfolderBase]: 2698/4399 cut-off events. [2024-06-27 21:15:06,723 INFO L125 PetriNetUnfolderBase]: For 516672/516680 co-relation queries the response was YES. [2024-06-27 21:15:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37373 conditions, 4399 events. 2698/4399 cut-off events. For 516672/516680 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 26380 event pairs, 567 based on Foata normal form. 6/4402 useless extension candidates. Maximal degree in co-relation 37214. Up to 4097 conditions per place. [2024-06-27 21:15:06,779 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 407 selfloop transitions, 27 changer transitions 0/439 dead transitions. [2024-06-27 21:15:06,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 439 transitions, 7742 flow [2024-06-27 21:15:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:15:06,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 21:15:06,780 INFO L175 Difference]: Start difference. First operand has 320 places, 420 transitions, 6792 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:15:06,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 439 transitions, 7742 flow [2024-06-27 21:15:08,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 439 transitions, 7658 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:15:08,145 INFO L231 Difference]: Finished difference. Result has 324 places, 422 transitions, 6807 flow [2024-06-27 21:15:08,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6722, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6807, PETRI_PLACES=324, PETRI_TRANSITIONS=422} [2024-06-27 21:15:08,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 21:15:08,146 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 422 transitions, 6807 flow [2024-06-27 21:15:08,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:08,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:08,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:08,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:15:08,147 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 21:15:08,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2083413498, now seen corresponding path program 3 times [2024-06-27 21:15:08,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:08,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446085874] [2024-06-27 21:15:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:08,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:10,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446085874] [2024-06-27 21:15:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446085874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:10,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:10,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:15:10,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491799046] [2024-06-27 21:15:10,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:10,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:15:10,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:15:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:15:10,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:10,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 422 transitions, 6807 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 21:15:10,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:10,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:10,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:12,215 INFO L124 PetriNetUnfolderBase]: 2706/4402 cut-off events. [2024-06-27 21:15:12,216 INFO L125 PetriNetUnfolderBase]: For 528025/528027 co-relation queries the response was YES. [2024-06-27 21:15:12,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37516 conditions, 4402 events. 2706/4402 cut-off events. For 528025/528027 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26357 event pairs, 565 based on Foata normal form. 2/4400 useless extension candidates. Maximal degree in co-relation 37355. Up to 4109 conditions per place. [2024-06-27 21:15:12,269 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 408 selfloop transitions, 29 changer transitions 0/442 dead transitions. [2024-06-27 21:15:12,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 442 transitions, 7755 flow [2024-06-27 21:15:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:15:12,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:15:12,271 INFO L175 Difference]: Start difference. First operand has 324 places, 422 transitions, 6807 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:15:12,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 442 transitions, 7755 flow [2024-06-27 21:15:13,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 442 transitions, 7690 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:13,814 INFO L231 Difference]: Finished difference. Result has 327 places, 424 transitions, 6835 flow [2024-06-27 21:15:13,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6742, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6835, PETRI_PLACES=327, PETRI_TRANSITIONS=424} [2024-06-27 21:15:13,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-27 21:15:13,814 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 424 transitions, 6835 flow [2024-06-27 21:15:13,815 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 21:15:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:13,815 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 21:15:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:15:13,815 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 21:15:13,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash -439196168, now seen corresponding path program 1 times [2024-06-27 21:15:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:13,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687474673] [2024-06-27 21:15:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:13,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:16,703 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 21:15:16,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:16,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687474673] [2024-06-27 21:15:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687474673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:16,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:16,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100805740] [2024-06-27 21:15:16,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:16,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:16,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 424 transitions, 6835 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 21:15:16,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:16,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:16,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:18,501 INFO L124 PetriNetUnfolderBase]: 2714/4408 cut-off events. [2024-06-27 21:15:18,501 INFO L125 PetriNetUnfolderBase]: For 540071/540073 co-relation queries the response was YES. [2024-06-27 21:15:18,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37781 conditions, 4408 events. 2714/4408 cut-off events. For 540071/540073 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 26332 event pairs, 545 based on Foata normal form. 2/4406 useless extension candidates. Maximal degree in co-relation 37619. Up to 4057 conditions per place. [2024-06-27 21:15:18,558 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 51 changer transitions 0/447 dead transitions. [2024-06-27 21:15:18,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 447 transitions, 7839 flow [2024-06-27 21:15:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:15:18,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:15:18,559 INFO L175 Difference]: Start difference. First operand has 327 places, 424 transitions, 6835 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:15:18,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 447 transitions, 7839 flow [2024-06-27 21:15:19,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 447 transitions, 7766 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:19,860 INFO L231 Difference]: Finished difference. Result has 329 places, 426 transitions, 6939 flow [2024-06-27 21:15:19,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6939, PETRI_PLACES=329, PETRI_TRANSITIONS=426} [2024-06-27 21:15:19,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 21:15:19,861 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 426 transitions, 6939 flow [2024-06-27 21:15:19,861 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 21:15:19,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:19,861 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 21:15:19,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:15:19,862 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 21:15:19,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1200955608, now seen corresponding path program 4 times [2024-06-27 21:15:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:19,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831273240] [2024-06-27 21:15:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:19,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:21,745 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 21:15:21,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831273240] [2024-06-27 21:15:21,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831273240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:21,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:21,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:15:21,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782878471] [2024-06-27 21:15:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:15:21,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:21,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:15:21,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:15:21,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:21,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 426 transitions, 6939 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:21,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:21,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:21,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:23,261 INFO L124 PetriNetUnfolderBase]: 2709/4419 cut-off events. [2024-06-27 21:15:23,261 INFO L125 PetriNetUnfolderBase]: For 543192/543194 co-relation queries the response was YES. [2024-06-27 21:15:23,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37842 conditions, 4419 events. 2709/4419 cut-off events. For 543192/543194 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26539 event pairs, 521 based on Foata normal form. 2/4419 useless extension candidates. Maximal degree in co-relation 37679. Up to 4101 conditions per place. [2024-06-27 21:15:23,323 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 423 selfloop transitions, 23 changer transitions 0/451 dead transitions. [2024-06-27 21:15:23,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 451 transitions, 7901 flow [2024-06-27 21:15:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:15:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:15:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:15:23,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:15:23,326 INFO L175 Difference]: Start difference. First operand has 329 places, 426 transitions, 6939 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:15:23,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 451 transitions, 7901 flow [2024-06-27 21:15:24,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 451 transitions, 7728 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:24,892 INFO L231 Difference]: Finished difference. Result has 330 places, 426 transitions, 6820 flow [2024-06-27 21:15:24,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6820, PETRI_PLACES=330, PETRI_TRANSITIONS=426} [2024-06-27 21:15:24,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 21:15:24,893 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 426 transitions, 6820 flow [2024-06-27 21:15:24,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:24,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:24,893 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 21:15:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:15:24,894 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 21:15:24,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash 757910678, now seen corresponding path program 2 times [2024-06-27 21:15:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:24,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658151554] [2024-06-27 21:15:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:27,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658151554] [2024-06-27 21:15:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658151554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:27,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:27,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:27,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979853679] [2024-06-27 21:15:27,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:27,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:27,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:27,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:27,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 426 transitions, 6820 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 21:15:27,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:27,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:27,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:29,576 INFO L124 PetriNetUnfolderBase]: 2717/4421 cut-off events. [2024-06-27 21:15:29,576 INFO L125 PetriNetUnfolderBase]: For 554707/554709 co-relation queries the response was YES. [2024-06-27 21:15:29,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37905 conditions, 4421 events. 2717/4421 cut-off events. For 554707/554709 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26498 event pairs, 534 based on Foata normal form. 2/4421 useless extension candidates. Maximal degree in co-relation 37741. Up to 4097 conditions per place. [2024-06-27 21:15:29,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 33 changer transitions 0/450 dead transitions. [2024-06-27 21:15:29,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 450 transitions, 7836 flow [2024-06-27 21:15:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:15:29,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 21:15:29,639 INFO L175 Difference]: Start difference. First operand has 330 places, 426 transitions, 6820 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:15:29,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 450 transitions, 7836 flow [2024-06-27 21:15:31,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 450 transitions, 7776 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:31,200 INFO L231 Difference]: Finished difference. Result has 333 places, 428 transitions, 6905 flow [2024-06-27 21:15:31,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6760, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6905, PETRI_PLACES=333, PETRI_TRANSITIONS=428} [2024-06-27 21:15:31,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 21:15:31,201 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 428 transitions, 6905 flow [2024-06-27 21:15:31,201 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 21:15:31,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:31,201 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 21:15:31,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:15:31,201 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 21:15:31,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash 521735318, now seen corresponding path program 3 times [2024-06-27 21:15:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:31,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413232352] [2024-06-27 21:15:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:34,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:34,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413232352] [2024-06-27 21:15:34,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413232352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:34,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:34,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:34,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087485881] [2024-06-27 21:15:34,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:34,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:34,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:34,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:34,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:34,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 428 transitions, 6905 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 21:15:34,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:34,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:34,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:35,543 INFO L124 PetriNetUnfolderBase]: 2725/4439 cut-off events. [2024-06-27 21:15:35,543 INFO L125 PetriNetUnfolderBase]: For 568544/568546 co-relation queries the response was YES. [2024-06-27 21:15:35,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38294 conditions, 4439 events. 2725/4439 cut-off events. For 568544/568546 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26644 event pairs, 535 based on Foata normal form. 2/4439 useless extension candidates. Maximal degree in co-relation 38129. Up to 4109 conditions per place. [2024-06-27 21:15:35,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 34 changer transitions 0/456 dead transitions. [2024-06-27 21:15:35,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 456 transitions, 7949 flow [2024-06-27 21:15:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:15:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:15:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:15:35,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 21:15:35,605 INFO L175 Difference]: Start difference. First operand has 333 places, 428 transitions, 6905 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:15:35,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 456 transitions, 7949 flow [2024-06-27 21:15:37,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 456 transitions, 7820 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:37,071 INFO L231 Difference]: Finished difference. Result has 334 places, 430 transitions, 6927 flow [2024-06-27 21:15:37,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6927, PETRI_PLACES=334, PETRI_TRANSITIONS=430} [2024-06-27 21:15:37,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-27 21:15:37,071 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 430 transitions, 6927 flow [2024-06-27 21:15:37,071 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 21:15:37,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:37,071 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 21:15:37,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:15:37,072 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 21:15:37,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 758207348, now seen corresponding path program 4 times [2024-06-27 21:15:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:37,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872690819] [2024-06-27 21:15:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:39,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872690819] [2024-06-27 21:15:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872690819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:39,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201745638] [2024-06-27 21:15:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:39,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:39,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 430 transitions, 6927 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 21:15:39,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:39,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:39,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:41,624 INFO L124 PetriNetUnfolderBase]: 2779/4521 cut-off events. [2024-06-27 21:15:41,624 INFO L125 PetriNetUnfolderBase]: For 614652/614654 co-relation queries the response was YES. [2024-06-27 21:15:41,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39615 conditions, 4521 events. 2779/4521 cut-off events. For 614652/614654 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 27139 event pairs, 535 based on Foata normal form. 2/4521 useless extension candidates. Maximal degree in co-relation 39449. Up to 4088 conditions per place. [2024-06-27 21:15:41,684 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 37 changer transitions 0/460 dead transitions. [2024-06-27 21:15:41,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 460 transitions, 8219 flow [2024-06-27 21:15:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:15:41,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:15:41,685 INFO L175 Difference]: Start difference. First operand has 334 places, 430 transitions, 6927 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:15:41,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 460 transitions, 8219 flow [2024-06-27 21:15:43,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 460 transitions, 8084 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:43,518 INFO L231 Difference]: Finished difference. Result has 337 places, 433 transitions, 6975 flow [2024-06-27 21:15:43,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6792, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6975, PETRI_PLACES=337, PETRI_TRANSITIONS=433} [2024-06-27 21:15:43,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 21:15:43,519 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 433 transitions, 6975 flow [2024-06-27 21:15:43,519 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 21:15:43,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:43,519 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 21:15:43,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:15:43,519 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 21:15:43,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -923033781, now seen corresponding path program 1 times [2024-06-27 21:15:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:43,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627561907] [2024-06-27 21:15:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:46,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627561907] [2024-06-27 21:15:46,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627561907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:46,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:46,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:46,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410661966] [2024-06-27 21:15:46,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:46,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:46,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:46,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:46,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 433 transitions, 6975 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 21:15:46,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:46,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:46,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:48,400 INFO L124 PetriNetUnfolderBase]: 2847/4640 cut-off events. [2024-06-27 21:15:48,400 INFO L125 PetriNetUnfolderBase]: For 655650/655656 co-relation queries the response was YES. [2024-06-27 21:15:48,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40375 conditions, 4640 events. 2847/4640 cut-off events. For 655650/655656 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27975 event pairs, 454 based on Foata normal form. 14/4652 useless extension candidates. Maximal degree in co-relation 40208. Up to 3981 conditions per place. [2024-06-27 21:15:48,466 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 62 changer transitions 0/485 dead transitions. [2024-06-27 21:15:48,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 485 transitions, 8355 flow [2024-06-27 21:15:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:15:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:15:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:15:48,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-27 21:15:48,467 INFO L175 Difference]: Start difference. First operand has 337 places, 433 transitions, 6975 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:15:48,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 485 transitions, 8355 flow [2024-06-27 21:15:50,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 485 transitions, 8240 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:50,588 INFO L231 Difference]: Finished difference. Result has 344 places, 436 transitions, 7064 flow [2024-06-27 21:15:50,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7064, PETRI_PLACES=344, PETRI_TRANSITIONS=436} [2024-06-27 21:15:50,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 21:15:50,588 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 436 transitions, 7064 flow [2024-06-27 21:15:50,588 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 21:15:50,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:50,588 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, 1] [2024-06-27 21:15:50,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:15:50,589 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 21:15:50,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2008523461, now seen corresponding path program 2 times [2024-06-27 21:15:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:50,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754092327] [2024-06-27 21:15:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:50,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:53,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:53,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754092327] [2024-06-27 21:15:53,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754092327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:53,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:53,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62145472] [2024-06-27 21:15:53,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:53,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:53,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 436 transitions, 7064 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 21:15:53,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:53,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:53,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:55,762 INFO L124 PetriNetUnfolderBase]: 2939/4784 cut-off events. [2024-06-27 21:15:55,762 INFO L125 PetriNetUnfolderBase]: For 668120/668126 co-relation queries the response was YES. [2024-06-27 21:15:55,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41742 conditions, 4784 events. 2939/4784 cut-off events. For 668120/668126 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29071 event pairs, 561 based on Foata normal form. 14/4796 useless extension candidates. Maximal degree in co-relation 41572. Up to 4279 conditions per place. [2024-06-27 21:15:55,832 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 68 changer transitions 0/494 dead transitions. [2024-06-27 21:15:55,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 494 transitions, 8465 flow [2024-06-27 21:15:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:15:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:15:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-27 21:15:55,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:15:55,833 INFO L175 Difference]: Start difference. First operand has 344 places, 436 transitions, 7064 flow. Second operand 12 states and 195 transitions. [2024-06-27 21:15:55,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 494 transitions, 8465 flow [2024-06-27 21:15:58,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 494 transitions, 8319 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:58,198 INFO L231 Difference]: Finished difference. Result has 352 places, 449 transitions, 7331 flow [2024-06-27 21:15:58,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6932, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7331, PETRI_PLACES=352, PETRI_TRANSITIONS=449} [2024-06-27 21:15:58,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 21:15:58,199 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 449 transitions, 7331 flow [2024-06-27 21:15:58,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:58,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:58,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:58,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:15:58,199 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 21:15:58,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 180281445, now seen corresponding path program 1 times [2024-06-27 21:15:58,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:58,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123865600] [2024-06-27 21:15:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:58,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:01,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:01,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123865600] [2024-06-27 21:16:01,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123865600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:01,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:01,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597286086] [2024-06-27 21:16:01,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:01,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:01,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:01,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:01,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 449 transitions, 7331 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:01,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:01,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:01,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:03,166 INFO L124 PetriNetUnfolderBase]: 2944/4797 cut-off events. [2024-06-27 21:16:03,166 INFO L125 PetriNetUnfolderBase]: For 646566/646572 co-relation queries the response was YES. [2024-06-27 21:16:03,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41779 conditions, 4797 events. 2944/4797 cut-off events. For 646566/646572 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29196 event pairs, 597 based on Foata normal form. 7/4802 useless extension candidates. Maximal degree in co-relation 41608. Up to 4336 conditions per place. [2024-06-27 21:16:03,234 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 406 selfloop transitions, 80 changer transitions 0/491 dead transitions. [2024-06-27 21:16:03,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 491 transitions, 8663 flow [2024-06-27 21:16:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:16:03,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:16:03,236 INFO L175 Difference]: Start difference. First operand has 352 places, 449 transitions, 7331 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:16:03,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 491 transitions, 8663 flow [2024-06-27 21:16:05,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 491 transitions, 8495 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:16:05,490 INFO L231 Difference]: Finished difference. Result has 353 places, 452 transitions, 7382 flow [2024-06-27 21:16:05,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7382, PETRI_PLACES=353, PETRI_TRANSITIONS=452} [2024-06-27 21:16:05,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 21:16:05,490 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 452 transitions, 7382 flow [2024-06-27 21:16:05,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:05,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:05,490 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 21:16:05,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:16:05,490 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 21:16:05,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:05,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2089772167, now seen corresponding path program 1 times [2024-06-27 21:16:05,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:05,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440589584] [2024-06-27 21:16:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:05,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:08,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440589584] [2024-06-27 21:16:08,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440589584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:08,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:08,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513573314] [2024-06-27 21:16:08,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:08,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:08,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:08,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:08,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 452 transitions, 7382 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 21:16:08,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:08,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:08,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:10,893 INFO L124 PetriNetUnfolderBase]: 2970/4833 cut-off events. [2024-06-27 21:16:10,893 INFO L125 PetriNetUnfolderBase]: For 674194/674200 co-relation queries the response was YES. [2024-06-27 21:16:10,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42317 conditions, 4833 events. 2970/4833 cut-off events. For 674194/674200 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 29382 event pairs, 559 based on Foata normal form. 8/4839 useless extension candidates. Maximal degree in co-relation 42145. Up to 4183 conditions per place. [2024-06-27 21:16:10,960 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 128 changer transitions 0/506 dead transitions. [2024-06-27 21:16:10,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 506 transitions, 9052 flow [2024-06-27 21:16:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:16:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:16:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-27 21:16:10,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-06-27 21:16:10,962 INFO L175 Difference]: Start difference. First operand has 353 places, 452 transitions, 7382 flow. Second operand 12 states and 205 transitions. [2024-06-27 21:16:10,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 506 transitions, 9052 flow [2024-06-27 21:16:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 506 transitions, 8870 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:16:13,028 INFO L231 Difference]: Finished difference. Result has 359 places, 458 transitions, 7656 flow [2024-06-27 21:16:13,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7200, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7656, PETRI_PLACES=359, PETRI_TRANSITIONS=458} [2024-06-27 21:16:13,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 21:16:13,029 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 458 transitions, 7656 flow [2024-06-27 21:16:13,029 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 21:16:13,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:13,029 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 21:16:13,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:16:13,029 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 21:16:13,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 349914553, now seen corresponding path program 2 times [2024-06-27 21:16:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:13,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350424098] [2024-06-27 21:16:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:16,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350424098] [2024-06-27 21:16:16,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350424098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:16,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:16,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:16,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464462433] [2024-06-27 21:16:16,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:16,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:16,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 458 transitions, 7656 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 21:16:16,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:16,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:16,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:18,638 INFO L124 PetriNetUnfolderBase]: 2967/4833 cut-off events. [2024-06-27 21:16:18,638 INFO L125 PetriNetUnfolderBase]: For 680831/680837 co-relation queries the response was YES. [2024-06-27 21:16:18,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43040 conditions, 4833 events. 2967/4833 cut-off events. For 680831/680837 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 29403 event pairs, 600 based on Foata normal form. 7/4838 useless extension candidates. Maximal degree in co-relation 42866. Up to 4369 conditions per place. [2024-06-27 21:16:18,710 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 412 selfloop transitions, 80 changer transitions 0/497 dead transitions. [2024-06-27 21:16:18,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 497 transitions, 8754 flow [2024-06-27 21:16:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:16:18,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-27 21:16:18,711 INFO L175 Difference]: Start difference. First operand has 359 places, 458 transitions, 7656 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:16:18,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 497 transitions, 8754 flow [2024-06-27 21:16:21,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 497 transitions, 8491 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-27 21:16:21,456 INFO L231 Difference]: Finished difference. Result has 362 places, 458 transitions, 7559 flow [2024-06-27 21:16:21,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7393, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7559, PETRI_PLACES=362, PETRI_TRANSITIONS=458} [2024-06-27 21:16:21,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-27 21:16:21,456 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 458 transitions, 7559 flow [2024-06-27 21:16:21,456 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 21:16:21,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:21,457 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 21:16:21,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:16:21,457 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 21:16:21,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 661013503, now seen corresponding path program 3 times [2024-06-27 21:16:21,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:21,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870258975] [2024-06-27 21:16:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:24,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:24,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870258975] [2024-06-27 21:16:24,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870258975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:24,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:24,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:24,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410226930] [2024-06-27 21:16:24,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:24,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:24,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 458 transitions, 7559 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 21:16:24,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:24,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:24,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:26,748 INFO L124 PetriNetUnfolderBase]: 3003/4874 cut-off events. [2024-06-27 21:16:26,748 INFO L125 PetriNetUnfolderBase]: For 729470/729472 co-relation queries the response was YES. [2024-06-27 21:16:26,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43392 conditions, 4874 events. 3003/4874 cut-off events. For 729470/729472 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 29539 event pairs, 576 based on Foata normal form. 8/4880 useless extension candidates. Maximal degree in co-relation 43216. Up to 4370 conditions per place. [2024-06-27 21:16:26,818 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 67 changer transitions 0/499 dead transitions. [2024-06-27 21:16:26,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 499 transitions, 8765 flow [2024-06-27 21:16:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:16:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:16:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 21:16:26,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-27 21:16:26,819 INFO L175 Difference]: Start difference. First operand has 362 places, 458 transitions, 7559 flow. Second operand 12 states and 190 transitions. [2024-06-27 21:16:26,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 499 transitions, 8765 flow [2024-06-27 21:16:29,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 499 transitions, 8569 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 21:16:29,710 INFO L231 Difference]: Finished difference. Result has 368 places, 463 transitions, 7630 flow [2024-06-27 21:16:29,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7369, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7630, PETRI_PLACES=368, PETRI_TRANSITIONS=463} [2024-06-27 21:16:29,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 21:16:29,711 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 463 transitions, 7630 flow [2024-06-27 21:16:29,711 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 21:16:29,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:29,711 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 21:16:29,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:16:29,712 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 21:16:29,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:29,712 INFO L85 PathProgramCache]: Analyzing trace with hash -535297201, now seen corresponding path program 3 times [2024-06-27 21:16:29,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:29,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296152717] [2024-06-27 21:16:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:29,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:32,415 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 21:16:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296152717] [2024-06-27 21:16:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296152717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:32,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:32,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362519287] [2024-06-27 21:16:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:32,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:32,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 463 transitions, 7630 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:32,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:32,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:32,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:34,623 INFO L124 PetriNetUnfolderBase]: 3048/4953 cut-off events. [2024-06-27 21:16:34,623 INFO L125 PetriNetUnfolderBase]: For 732273/732275 co-relation queries the response was YES. [2024-06-27 21:16:34,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44577 conditions, 4953 events. 3048/4953 cut-off events. For 732273/732275 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 30255 event pairs, 633 based on Foata normal form. 1/4949 useless extension candidates. Maximal degree in co-relation 44398. Up to 4191 conditions per place. [2024-06-27 21:16:34,698 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 181 changer transitions 0/512 dead transitions. [2024-06-27 21:16:34,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 512 transitions, 9717 flow [2024-06-27 21:16:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:16:34,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:16:34,700 INFO L175 Difference]: Start difference. First operand has 368 places, 463 transitions, 7630 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:16:34,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 512 transitions, 9717 flow [2024-06-27 21:16:37,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 512 transitions, 9570 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:16:37,283 INFO L231 Difference]: Finished difference. Result has 369 places, 481 transitions, 8234 flow [2024-06-27 21:16:37,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7483, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8234, PETRI_PLACES=369, PETRI_TRANSITIONS=481} [2024-06-27 21:16:37,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 21:16:37,283 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 481 transitions, 8234 flow [2024-06-27 21:16:37,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:37,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:37,283 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 21:16:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:16:37,283 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 21:16:37,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1549776037, now seen corresponding path program 4 times [2024-06-27 21:16:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:37,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684632376] [2024-06-27 21:16:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:37,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:40,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:40,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684632376] [2024-06-27 21:16:40,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684632376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:40,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:40,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:40,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097692969] [2024-06-27 21:16:40,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:40,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:40,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:40,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 481 transitions, 8234 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:40,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:40,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:40,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:42,487 INFO L124 PetriNetUnfolderBase]: 3061/4971 cut-off events. [2024-06-27 21:16:42,487 INFO L125 PetriNetUnfolderBase]: For 751679/751681 co-relation queries the response was YES. [2024-06-27 21:16:42,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45150 conditions, 4971 events. 3061/4971 cut-off events. For 751679/751681 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 30298 event pairs, 633 based on Foata normal form. 1/4967 useless extension candidates. Maximal degree in co-relation 44970. Up to 4206 conditions per place. [2024-06-27 21:16:42,555 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 186 changer transitions 0/514 dead transitions. [2024-06-27 21:16:42,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 514 transitions, 10070 flow [2024-06-27 21:16:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:16:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:16:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:16:42,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:16:42,557 INFO L175 Difference]: Start difference. First operand has 369 places, 481 transitions, 8234 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:16:42,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 514 transitions, 10070 flow [2024-06-27 21:16:45,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 514 transitions, 9769 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:45,299 INFO L231 Difference]: Finished difference. Result has 374 places, 487 transitions, 8445 flow [2024-06-27 21:16:45,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7961, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8445, PETRI_PLACES=374, PETRI_TRANSITIONS=487} [2024-06-27 21:16:45,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 21:16:45,299 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 487 transitions, 8445 flow [2024-06-27 21:16:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:45,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:45,299 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 21:16:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:16:45,300 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 21:16:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -534998299, now seen corresponding path program 1 times [2024-06-27 21:16:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368240134] [2024-06-27 21:16:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:47,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:47,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368240134] [2024-06-27 21:16:47,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368240134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:47,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:47,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:16:47,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676895393] [2024-06-27 21:16:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:47,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:16:47,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:47,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:16:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:16:48,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:48,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 487 transitions, 8445 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:48,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:48,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:48,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:50,078 INFO L124 PetriNetUnfolderBase]: 3103/5029 cut-off events. [2024-06-27 21:16:50,078 INFO L125 PetriNetUnfolderBase]: For 794349/794355 co-relation queries the response was YES. [2024-06-27 21:16:50,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46155 conditions, 5029 events. 3103/5029 cut-off events. For 794349/794355 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30615 event pairs, 611 based on Foata normal form. 8/5032 useless extension candidates. Maximal degree in co-relation 45974. Up to 4407 conditions per place. [2024-06-27 21:16:50,152 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 132 changer transitions 0/529 dead transitions. [2024-06-27 21:16:50,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 529 transitions, 10173 flow [2024-06-27 21:16:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:16:50,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 21:16:50,153 INFO L175 Difference]: Start difference. First operand has 374 places, 487 transitions, 8445 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:16:50,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 529 transitions, 10173 flow [2024-06-27 21:16:52,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 529 transitions, 9968 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:52,645 INFO L231 Difference]: Finished difference. Result has 381 places, 496 transitions, 8686 flow [2024-06-27 21:16:52,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8686, PETRI_PLACES=381, PETRI_TRANSITIONS=496} [2024-06-27 21:16:52,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 21:16:52,646 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 496 transitions, 8686 flow [2024-06-27 21:16:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:52,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:52,646 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 21:16:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:16:52,646 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 21:16:52,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1368710985, now seen corresponding path program 5 times [2024-06-27 21:16:52,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:52,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560944393] [2024-06-27 21:16:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:55,985 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 21:16:55,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560944393] [2024-06-27 21:16:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560944393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:55,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:55,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:55,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119640445] [2024-06-27 21:16:55,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:55,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:56,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:56,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 496 transitions, 8686 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 21:16:56,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:56,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:56,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:58,468 INFO L124 PetriNetUnfolderBase]: 3124/5063 cut-off events. [2024-06-27 21:16:58,468 INFO L125 PetriNetUnfolderBase]: For 816364/816366 co-relation queries the response was YES. [2024-06-27 21:16:58,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46742 conditions, 5063 events. 3124/5063 cut-off events. For 816364/816366 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30921 event pairs, 634 based on Foata normal form. 1/5058 useless extension candidates. Maximal degree in co-relation 46560. Up to 4288 conditions per place. [2024-06-27 21:16:58,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 337 selfloop transitions, 198 changer transitions 0/540 dead transitions. [2024-06-27 21:16:58,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 540 transitions, 10454 flow [2024-06-27 21:16:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:16:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:16:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:16:58,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:16:58,543 INFO L175 Difference]: Start difference. First operand has 381 places, 496 transitions, 8686 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:16:58,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 540 transitions, 10454 flow [2024-06-27 21:17:01,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 540 transitions, 10223 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:01,280 INFO L231 Difference]: Finished difference. Result has 384 places, 505 transitions, 9043 flow [2024-06-27 21:17:01,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8455, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9043, PETRI_PLACES=384, PETRI_TRANSITIONS=505} [2024-06-27 21:17:01,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 21:17:01,280 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 505 transitions, 9043 flow [2024-06-27 21:17:01,280 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 21:17:01,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:01,281 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 21:17:01,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:17:01,281 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 21:17:01,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1368830955, now seen corresponding path program 6 times [2024-06-27 21:17:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:01,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730365565] [2024-06-27 21:17:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:04,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:04,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730365565] [2024-06-27 21:17:04,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730365565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:04,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:04,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:04,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515808838] [2024-06-27 21:17:04,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:04,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:04,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:05,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:05,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 505 transitions, 9043 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 21:17:05,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:05,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:05,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:07,463 INFO L124 PetriNetUnfolderBase]: 3129/5072 cut-off events. [2024-06-27 21:17:07,464 INFO L125 PetriNetUnfolderBase]: For 833634/833636 co-relation queries the response was YES. [2024-06-27 21:17:07,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47133 conditions, 5072 events. 3129/5072 cut-off events. For 833634/833636 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 31026 event pairs, 634 based on Foata normal form. 1/5067 useless extension candidates. Maximal degree in co-relation 46950. Up to 4294 conditions per place. [2024-06-27 21:17:07,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 201 changer transitions 0/538 dead transitions. [2024-06-27 21:17:07,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 538 transitions, 10472 flow [2024-06-27 21:17:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:17:07,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 21:17:07,538 INFO L175 Difference]: Start difference. First operand has 384 places, 505 transitions, 9043 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:17:07,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 538 transitions, 10472 flow [2024-06-27 21:17:10,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 538 transitions, 9980 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:10,640 INFO L231 Difference]: Finished difference. Result has 387 places, 508 transitions, 9030 flow [2024-06-27 21:17:10,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8575, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9030, PETRI_PLACES=387, PETRI_TRANSITIONS=508} [2024-06-27 21:17:10,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 21:17:10,640 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 508 transitions, 9030 flow [2024-06-27 21:17:10,640 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 21:17:10,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:10,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:10,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:17:10,640 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 21:17:10,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1555316791, now seen corresponding path program 2 times [2024-06-27 21:17:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:10,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240825579] [2024-06-27 21:17:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:13,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:13,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240825579] [2024-06-27 21:17:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240825579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:13,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:13,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078362455] [2024-06-27 21:17:13,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:13,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:13,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:13,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 508 transitions, 9030 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 21:17:13,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:13,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:13,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:15,900 INFO L124 PetriNetUnfolderBase]: 3187/5160 cut-off events. [2024-06-27 21:17:15,901 INFO L125 PetriNetUnfolderBase]: For 892475/892477 co-relation queries the response was YES. [2024-06-27 21:17:15,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48742 conditions, 5160 events. 3187/5160 cut-off events. For 892475/892477 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31551 event pairs, 617 based on Foata normal form. 2/5156 useless extension candidates. Maximal degree in co-relation 48558. Up to 3879 conditions per place. [2024-06-27 21:17:15,980 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 258 selfloop transitions, 295 changer transitions 0/558 dead transitions. [2024-06-27 21:17:15,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 558 transitions, 11390 flow [2024-06-27 21:17:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:17:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:17:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-27 21:17:15,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-06-27 21:17:15,981 INFO L175 Difference]: Start difference. First operand has 387 places, 508 transitions, 9030 flow. Second operand 12 states and 205 transitions. [2024-06-27 21:17:15,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 558 transitions, 11390 flow [2024-06-27 21:17:19,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 558 transitions, 11130 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:19,211 INFO L231 Difference]: Finished difference. Result has 395 places, 517 transitions, 9745 flow [2024-06-27 21:17:19,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8770, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9745, PETRI_PLACES=395, PETRI_TRANSITIONS=517} [2024-06-27 21:17:19,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 21:17:19,212 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 517 transitions, 9745 flow [2024-06-27 21:17:19,212 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 21:17:19,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:19,212 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 21:17:19,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:17:19,212 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 21:17:19,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1546051015, now seen corresponding path program 2 times [2024-06-27 21:17:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:19,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919593352] [2024-06-27 21:17:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:22,535 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 21:17:22,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919593352] [2024-06-27 21:17:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919593352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255015139] [2024-06-27 21:17:22,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:22,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:22,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 517 transitions, 9745 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 21:17:22,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:22,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:22,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:25,061 INFO L124 PetriNetUnfolderBase]: 3213/5205 cut-off events. [2024-06-27 21:17:25,061 INFO L125 PetriNetUnfolderBase]: For 930692/930698 co-relation queries the response was YES. [2024-06-27 21:17:25,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50628 conditions, 5205 events. 3213/5205 cut-off events. For 930692/930698 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31908 event pairs, 625 based on Foata normal form. 8/5208 useless extension candidates. Maximal degree in co-relation 50441. Up to 4548 conditions per place. [2024-06-27 21:17:25,141 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 138 changer transitions 0/561 dead transitions. [2024-06-27 21:17:25,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 561 transitions, 11501 flow [2024-06-27 21:17:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:17:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:17:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-06-27 21:17:25,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791208791208791 [2024-06-27 21:17:25,142 INFO L175 Difference]: Start difference. First operand has 395 places, 517 transitions, 9745 flow. Second operand 13 states and 207 transitions. [2024-06-27 21:17:25,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 561 transitions, 11501 flow [2024-06-27 21:17:28,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 561 transitions, 11104 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-27 21:17:28,492 INFO L231 Difference]: Finished difference. Result has 402 places, 523 transitions, 9744 flow [2024-06-27 21:17:28,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9348, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9744, PETRI_PLACES=402, PETRI_TRANSITIONS=523} [2024-06-27 21:17:28,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 21:17:28,492 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 523 transitions, 9744 flow [2024-06-27 21:17:28,493 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 21:17:28,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:28,493 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 21:17:28,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:17:28,493 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 21:17:28,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062361, now seen corresponding path program 3 times [2024-06-27 21:17:28,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776457735] [2024-06-27 21:17:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:31,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776457735] [2024-06-27 21:17:31,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776457735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:31,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:31,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093563109] [2024-06-27 21:17:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:31,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:31,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:31,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:31,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:31,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:31,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 523 transitions, 9744 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 21:17:31,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:31,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:31,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:33,926 INFO L124 PetriNetUnfolderBase]: 3239/5240 cut-off events. [2024-06-27 21:17:33,927 INFO L125 PetriNetUnfolderBase]: For 954278/954280 co-relation queries the response was YES. [2024-06-27 21:17:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51062 conditions, 5240 events. 3239/5240 cut-off events. For 954278/954280 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32035 event pairs, 621 based on Foata normal form. 2/5236 useless extension candidates. Maximal degree in co-relation 50873. Up to 3909 conditions per place. [2024-06-27 21:17:34,005 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 301 changer transitions 0/568 dead transitions. [2024-06-27 21:17:34,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 568 transitions, 12026 flow [2024-06-27 21:17:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:17:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:17:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2024-06-27 21:17:34,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-06-27 21:17:34,006 INFO L175 Difference]: Start difference. First operand has 402 places, 523 transitions, 9744 flow. Second operand 13 states and 215 transitions. [2024-06-27 21:17:34,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 568 transitions, 12026 flow [2024-06-27 21:17:36,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 568 transitions, 11789 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 21:17:36,627 INFO L231 Difference]: Finished difference. Result has 407 places, 529 transitions, 10251 flow [2024-06-27 21:17:36,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9507, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10251, PETRI_PLACES=407, PETRI_TRANSITIONS=529} [2024-06-27 21:17:36,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 21:17:36,627 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 529 transitions, 10251 flow [2024-06-27 21:17:36,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:36,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:36,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:36,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:17:36,628 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 21:17:36,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1546056595, now seen corresponding path program 3 times [2024-06-27 21:17:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:36,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691496013] [2024-06-27 21:17:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:39,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:39,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691496013] [2024-06-27 21:17:39,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691496013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:39,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:39,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:39,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541798925] [2024-06-27 21:17:39,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:39,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:39,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:39,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:39,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:39,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 529 transitions, 10251 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 21:17:39,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:39,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:39,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:42,286 INFO L124 PetriNetUnfolderBase]: 3233/5223 cut-off events. [2024-06-27 21:17:42,286 INFO L125 PetriNetUnfolderBase]: For 962744/962750 co-relation queries the response was YES. [2024-06-27 21:17:42,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51461 conditions, 5223 events. 3233/5223 cut-off events. For 962744/962750 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31916 event pairs, 619 based on Foata normal form. 8/5226 useless extension candidates. Maximal degree in co-relation 51271. Up to 4579 conditions per place. [2024-06-27 21:17:42,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 138 changer transitions 0/566 dead transitions. [2024-06-27 21:17:42,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 566 transitions, 11691 flow [2024-06-27 21:17:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:17:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:17:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-27 21:17:42,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772893772893773 [2024-06-27 21:17:42,359 INFO L175 Difference]: Start difference. First operand has 407 places, 529 transitions, 10251 flow. Second operand 13 states and 206 transitions. [2024-06-27 21:17:42,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 566 transitions, 11691 flow [2024-06-27 21:17:45,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 566 transitions, 11078 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:45,512 INFO L231 Difference]: Finished difference. Result has 411 places, 529 transitions, 9920 flow [2024-06-27 21:17:45,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9638, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9920, PETRI_PLACES=411, PETRI_TRANSITIONS=529} [2024-06-27 21:17:45,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-27 21:17:45,512 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 529 transitions, 9920 flow [2024-06-27 21:17:45,512 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 21:17:45,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:45,512 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 21:17:45,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:17:45,513 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 21:17:45,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1546051201, now seen corresponding path program 4 times [2024-06-27 21:17:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:45,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665400585] [2024-06-27 21:17:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:45,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:48,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:48,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665400585] [2024-06-27 21:17:48,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665400585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:48,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:48,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316133249] [2024-06-27 21:17:48,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:48,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:48,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:48,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:48,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:48,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 529 transitions, 9920 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 21:17:48,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:48,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:48,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:50,835 INFO L124 PetriNetUnfolderBase]: 3227/5216 cut-off events. [2024-06-27 21:17:50,835 INFO L125 PetriNetUnfolderBase]: For 962325/962327 co-relation queries the response was YES. [2024-06-27 21:17:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50721 conditions, 5216 events. 3227/5216 cut-off events. For 962325/962327 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31866 event pairs, 618 based on Foata normal form. 2/5212 useless extension candidates. Maximal degree in co-relation 50530. Up to 3903 conditions per place. [2024-06-27 21:17:50,911 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 259 selfloop transitions, 300 changer transitions 0/564 dead transitions. [2024-06-27 21:17:50,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 564 transitions, 11846 flow [2024-06-27 21:17:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:17:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:17:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 21:17:50,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 21:17:50,913 INFO L175 Difference]: Start difference. First operand has 411 places, 529 transitions, 9920 flow. Second operand 11 states and 189 transitions. [2024-06-27 21:17:50,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 564 transitions, 11846 flow [2024-06-27 21:17:53,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 564 transitions, 11534 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-06-27 21:17:53,673 INFO L231 Difference]: Finished difference. Result has 411 places, 529 transitions, 10214 flow [2024-06-27 21:17:53,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9608, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10214, PETRI_PLACES=411, PETRI_TRANSITIONS=529} [2024-06-27 21:17:53,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-27 21:17:53,673 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 529 transitions, 10214 flow [2024-06-27 21:17:53,673 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 21:17:53,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:53,674 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 21:17:53,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:17:53,674 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 21:17:53,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1546056967, now seen corresponding path program 7 times [2024-06-27 21:17:53,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:53,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309228082] [2024-06-27 21:17:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:56,995 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 21:17:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:56,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309228082] [2024-06-27 21:17:56,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309228082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:56,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:56,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026150941] [2024-06-27 21:17:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:57,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:57,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 529 transitions, 10214 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 21:17:57,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:57,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:57,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:59,479 INFO L124 PetriNetUnfolderBase]: 3232/5233 cut-off events. [2024-06-27 21:17:59,479 INFO L125 PetriNetUnfolderBase]: For 975253/975255 co-relation queries the response was YES. [2024-06-27 21:17:59,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51391 conditions, 5233 events. 3232/5233 cut-off events. For 975253/975255 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32115 event pairs, 647 based on Foata normal form. 1/5228 useless extension candidates. Maximal degree in co-relation 51199. Up to 4436 conditions per place. [2024-06-27 21:17:59,565 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 204 changer transitions 0/559 dead transitions. [2024-06-27 21:17:59,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 559 transitions, 11898 flow [2024-06-27 21:17:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:17:59,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 21:17:59,566 INFO L175 Difference]: Start difference. First operand has 411 places, 529 transitions, 10214 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:17:59,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 559 transitions, 11898 flow [2024-06-27 21:18:02,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 559 transitions, 11292 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:18:02,608 INFO L231 Difference]: Finished difference. Result has 410 places, 532 transitions, 10082 flow [2024-06-27 21:18:02,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9614, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10082, PETRI_PLACES=410, PETRI_TRANSITIONS=532} [2024-06-27 21:18:02,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 21:18:02,609 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 532 transitions, 10082 flow [2024-06-27 21:18:02,609 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 21:18:02,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:02,609 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 21:18:02,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:18:02,609 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 21:18:02,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:02,610 INFO L85 PathProgramCache]: Analyzing trace with hash 615679473, now seen corresponding path program 8 times [2024-06-27 21:18:02,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:02,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615906424] [2024-06-27 21:18:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:02,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615906424] [2024-06-27 21:18:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615906424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:06,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:06,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:06,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585797626] [2024-06-27 21:18:06,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:06,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:06,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:06,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:06,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 532 transitions, 10082 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 21:18:06,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:06,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:06,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:08,925 INFO L124 PetriNetUnfolderBase]: 3229/5229 cut-off events. [2024-06-27 21:18:08,925 INFO L125 PetriNetUnfolderBase]: For 983360/983362 co-relation queries the response was YES. [2024-06-27 21:18:08,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51016 conditions, 5229 events. 3229/5229 cut-off events. For 983360/983362 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32036 event pairs, 647 based on Foata normal form. 1/5224 useless extension candidates. Maximal degree in co-relation 50823. Up to 4433 conditions per place. [2024-06-27 21:18:09,003 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 204 changer transitions 0/558 dead transitions. [2024-06-27 21:18:09,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 558 transitions, 11482 flow [2024-06-27 21:18:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:18:09,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 21:18:09,005 INFO L175 Difference]: Start difference. First operand has 410 places, 532 transitions, 10082 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:18:09,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 558 transitions, 11482 flow [2024-06-27 21:18:12,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 558 transitions, 11201 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:12,434 INFO L231 Difference]: Finished difference. Result has 414 places, 532 transitions, 10215 flow [2024-06-27 21:18:12,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9801, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10215, PETRI_PLACES=414, PETRI_TRANSITIONS=532} [2024-06-27 21:18:12,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-27 21:18:12,434 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 532 transitions, 10215 flow [2024-06-27 21:18:12,434 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 21:18:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:12,435 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 21:18:12,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:18:12,435 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 21:18:12,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash -349952537, now seen corresponding path program 5 times [2024-06-27 21:18:12,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:12,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103348553] [2024-06-27 21:18:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:12,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:15,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103348553] [2024-06-27 21:18:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103348553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:15,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:15,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620410833] [2024-06-27 21:18:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:15,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:15,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:15,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:15,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 532 transitions, 10215 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 21:18:15,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:15,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:15,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:17,927 INFO L124 PetriNetUnfolderBase]: 3271/5299 cut-off events. [2024-06-27 21:18:17,928 INFO L125 PetriNetUnfolderBase]: For 1036791/1036793 co-relation queries the response was YES. [2024-06-27 21:18:17,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52209 conditions, 5299 events. 3271/5299 cut-off events. For 1036791/1036793 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32569 event pairs, 602 based on Foata normal form. 2/5299 useless extension candidates. Maximal degree in co-relation 52015. Up to 4653 conditions per place. [2024-06-27 21:18:18,012 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 458 selfloop transitions, 110 changer transitions 0/573 dead transitions. [2024-06-27 21:18:18,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 573 transitions, 12076 flow [2024-06-27 21:18:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:18:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:18:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-27 21:18:18,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-27 21:18:18,013 INFO L175 Difference]: Start difference. First operand has 414 places, 532 transitions, 10215 flow. Second operand 12 states and 194 transitions. [2024-06-27 21:18:18,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 573 transitions, 12076 flow [2024-06-27 21:18:21,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 573 transitions, 11495 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:18:21,424 INFO L231 Difference]: Finished difference. Result has 418 places, 541 transitions, 10098 flow [2024-06-27 21:18:21,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9634, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10098, PETRI_PLACES=418, PETRI_TRANSITIONS=541} [2024-06-27 21:18:21,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 21:18:21,425 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 541 transitions, 10098 flow [2024-06-27 21:18:21,425 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 21:18:21,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:21,425 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 21:18:21,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:18:21,425 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 21:18:21,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:21,425 INFO L85 PathProgramCache]: Analyzing trace with hash 664824643, now seen corresponding path program 9 times [2024-06-27 21:18:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:21,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040408239] [2024-06-27 21:18:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:21,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:24,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040408239] [2024-06-27 21:18:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040408239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883802732] [2024-06-27 21:18:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:24,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:24,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 541 transitions, 10098 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 21:18:24,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:24,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:24,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:26,829 INFO L124 PetriNetUnfolderBase]: 3268/5289 cut-off events. [2024-06-27 21:18:26,829 INFO L125 PetriNetUnfolderBase]: For 1034571/1034573 co-relation queries the response was YES. [2024-06-27 21:18:26,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52030 conditions, 5289 events. 3268/5289 cut-off events. For 1034571/1034573 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32461 event pairs, 629 based on Foata normal form. 1/5288 useless extension candidates. Maximal degree in co-relation 51834. Up to 4843 conditions per place. [2024-06-27 21:18:26,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 67 changer transitions 0/564 dead transitions. [2024-06-27 21:18:26,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 564 transitions, 11504 flow [2024-06-27 21:18:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:18:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:18:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 21:18:26,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-27 21:18:26,919 INFO L175 Difference]: Start difference. First operand has 418 places, 541 transitions, 10098 flow. Second operand 10 states and 158 transitions. [2024-06-27 21:18:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 564 transitions, 11504 flow [2024-06-27 21:18:30,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 564 transitions, 11340 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 21:18:30,835 INFO L231 Difference]: Finished difference. Result has 421 places, 541 transitions, 10074 flow [2024-06-27 21:18:30,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9934, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10074, PETRI_PLACES=421, PETRI_TRANSITIONS=541} [2024-06-27 21:18:30,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-27 21:18:30,836 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 541 transitions, 10074 flow [2024-06-27 21:18:30,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:30,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:30,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:18:30,836 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 21:18:30,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash -349941191, now seen corresponding path program 4 times [2024-06-27 21:18:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:30,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817900831] [2024-06-27 21:18:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:33,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:33,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817900831] [2024-06-27 21:18:33,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817900831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:33,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:33,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269291197] [2024-06-27 21:18:33,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:33,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:33,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:33,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:33,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 541 transitions, 10074 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:33,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:33,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:33,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:35,840 INFO L124 PetriNetUnfolderBase]: 3282/5309 cut-off events. [2024-06-27 21:18:35,840 INFO L125 PetriNetUnfolderBase]: For 1067485/1067487 co-relation queries the response was YES. [2024-06-27 21:18:35,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52215 conditions, 5309 events. 3282/5309 cut-off events. For 1067485/1067487 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 32585 event pairs, 604 based on Foata normal form. 6/5313 useless extension candidates. Maximal degree in co-relation 52017. Up to 4725 conditions per place. [2024-06-27 21:18:35,933 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 465 selfloop transitions, 105 changer transitions 0/575 dead transitions. [2024-06-27 21:18:35,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 575 transitions, 11676 flow [2024-06-27 21:18:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:18:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:18:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:18:35,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-27 21:18:35,935 INFO L175 Difference]: Start difference. First operand has 421 places, 541 transitions, 10074 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:18:35,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 575 transitions, 11676 flow [2024-06-27 21:18:40,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 575 transitions, 11532 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:18:40,769 INFO L231 Difference]: Finished difference. Result has 424 places, 547 transitions, 10318 flow [2024-06-27 21:18:40,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9930, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10318, PETRI_PLACES=424, PETRI_TRANSITIONS=547} [2024-06-27 21:18:40,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 21:18:40,770 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 547 transitions, 10318 flow [2024-06-27 21:18:40,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:40,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:40,770 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 21:18:40,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:18:40,770 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 21:18:40,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash -349941377, now seen corresponding path program 6 times [2024-06-27 21:18:40,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:40,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127357224] [2024-06-27 21:18:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:40,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:43,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:43,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127357224] [2024-06-27 21:18:43,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127357224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:43,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:43,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977828494] [2024-06-27 21:18:43,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:43,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:43,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:43,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:43,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:43,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:43,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 547 transitions, 10318 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 21:18:43,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:43,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:43,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:46,073 INFO L124 PetriNetUnfolderBase]: 3292/5321 cut-off events. [2024-06-27 21:18:46,074 INFO L125 PetriNetUnfolderBase]: For 1064857/1064859 co-relation queries the response was YES. [2024-06-27 21:18:46,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52684 conditions, 5321 events. 3292/5321 cut-off events. For 1064857/1064859 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32628 event pairs, 598 based on Foata normal form. 2/5321 useless extension candidates. Maximal degree in co-relation 52485. Up to 4668 conditions per place. [2024-06-27 21:18:46,166 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 458 selfloop transitions, 119 changer transitions 0/582 dead transitions. [2024-06-27 21:18:46,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 582 transitions, 12092 flow [2024-06-27 21:18:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:18:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:18:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-27 21:18:46,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-27 21:18:46,168 INFO L175 Difference]: Start difference. First operand has 424 places, 547 transitions, 10318 flow. Second operand 12 states and 194 transitions. [2024-06-27 21:18:46,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 582 transitions, 12092 flow [2024-06-27 21:18:50,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 582 transitions, 11901 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:18:50,782 INFO L231 Difference]: Finished difference. Result has 428 places, 550 transitions, 10449 flow [2024-06-27 21:18:50,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10127, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10449, PETRI_PLACES=428, PETRI_TRANSITIONS=550} [2024-06-27 21:18:50,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 21:18:50,783 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 550 transitions, 10449 flow [2024-06-27 21:18:50,783 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 21:18:50,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:50,783 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 21:18:50,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:18:50,783 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 21:18:50,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1402166437, now seen corresponding path program 10 times [2024-06-27 21:18:50,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:50,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053502801] [2024-06-27 21:18:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:50,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:53,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:53,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053502801] [2024-06-27 21:18:53,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053502801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:53,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:53,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:18:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921972521] [2024-06-27 21:18:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:53,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:18:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:18:53,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:18:53,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:53,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 550 transitions, 10449 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:53,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:53,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:53,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:55,891 INFO L124 PetriNetUnfolderBase]: 3289/5331 cut-off events. [2024-06-27 21:18:55,892 INFO L125 PetriNetUnfolderBase]: For 1067483/1067485 co-relation queries the response was YES. [2024-06-27 21:18:55,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52756 conditions, 5331 events. 3289/5331 cut-off events. For 1067483/1067485 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 32843 event pairs, 632 based on Foata normal form. 1/5330 useless extension candidates. Maximal degree in co-relation 52556. Up to 4874 conditions per place. [2024-06-27 21:18:55,991 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 499 selfloop transitions, 67 changer transitions 0/571 dead transitions. [2024-06-27 21:18:55,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 571 transitions, 11637 flow [2024-06-27 21:18:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:18:55,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 21:18:55,993 INFO L175 Difference]: Start difference. First operand has 428 places, 550 transitions, 10449 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:18:55,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 571 transitions, 11637 flow [2024-06-27 21:19:00,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 571 transitions, 11374 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-27 21:19:00,913 INFO L231 Difference]: Finished difference. Result has 428 places, 550 transitions, 10326 flow [2024-06-27 21:19:00,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10186, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10326, PETRI_PLACES=428, PETRI_TRANSITIONS=550} [2024-06-27 21:19:00,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 21:19:00,914 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 550 transitions, 10326 flow [2024-06-27 21:19:00,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:00,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:00,914 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 21:19:00,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:19:00,914 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 21:19:00,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:00,915 INFO L85 PathProgramCache]: Analyzing trace with hash -342589727, now seen corresponding path program 7 times [2024-06-27 21:19:00,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:00,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612880438] [2024-06-27 21:19:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:00,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:04,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612880438] [2024-06-27 21:19:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612880438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:04,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129104823] [2024-06-27 21:19:04,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:04,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:04,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:04,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:04,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 550 transitions, 10326 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 21:19:04,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:04,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:04,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:06,653 INFO L124 PetriNetUnfolderBase]: 3283/5317 cut-off events. [2024-06-27 21:19:06,653 INFO L125 PetriNetUnfolderBase]: For 1076291/1076293 co-relation queries the response was YES. [2024-06-27 21:19:06,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52312 conditions, 5317 events. 3283/5317 cut-off events. For 1076291/1076293 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32703 event pairs, 600 based on Foata normal form. 2/5317 useless extension candidates. Maximal degree in co-relation 52111. Up to 4663 conditions per place. [2024-06-27 21:19:06,734 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 459 selfloop transitions, 116 changer transitions 0/580 dead transitions. [2024-06-27 21:19:06,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 580 transitions, 11786 flow [2024-06-27 21:19:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:19:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:19:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-27 21:19:06,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:19:06,736 INFO L175 Difference]: Start difference. First operand has 428 places, 550 transitions, 10326 flow. Second operand 12 states and 192 transitions. [2024-06-27 21:19:06,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 580 transitions, 11786 flow [2024-06-27 21:19:11,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 580 transitions, 11590 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 21:19:11,677 INFO L231 Difference]: Finished difference. Result has 432 places, 550 transitions, 10368 flow [2024-06-27 21:19:11,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10130, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10368, PETRI_PLACES=432, PETRI_TRANSITIONS=550} [2024-06-27 21:19:11,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 21:19:11,678 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 550 transitions, 10368 flow [2024-06-27 21:19:11,678 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 21:19:11,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:11,678 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 21:19:11,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:19:11,678 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 21:19:11,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:11,679 INFO L85 PathProgramCache]: Analyzing trace with hash -349946771, now seen corresponding path program 5 times [2024-06-27 21:19:11,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:11,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047297958] [2024-06-27 21:19:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:11,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:14,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047297958] [2024-06-27 21:19:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047297958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:14,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:14,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090109958] [2024-06-27 21:19:14,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:14,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:14,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:14,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:14,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 550 transitions, 10368 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:14,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:14,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:14,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:16,681 INFO L124 PetriNetUnfolderBase]: 3271/5301 cut-off events. [2024-06-27 21:19:16,682 INFO L125 PetriNetUnfolderBase]: For 1078318/1078320 co-relation queries the response was YES. [2024-06-27 21:19:16,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51886 conditions, 5301 events. 3271/5301 cut-off events. For 1078318/1078320 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32675 event pairs, 601 based on Foata normal form. 4/5303 useless extension candidates. Maximal degree in co-relation 51684. Up to 4717 conditions per place. [2024-06-27 21:19:16,767 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 468 selfloop transitions, 105 changer transitions 0/578 dead transitions. [2024-06-27 21:19:16,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 578 transitions, 11584 flow [2024-06-27 21:19:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:19:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:19:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:19:16,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-27 21:19:16,768 INFO L175 Difference]: Start difference. First operand has 432 places, 550 transitions, 10368 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:19:16,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 578 transitions, 11584 flow [2024-06-27 21:19:21,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 578 transitions, 11329 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 21:19:21,610 INFO L231 Difference]: Finished difference. Result has 432 places, 550 transitions, 10334 flow [2024-06-27 21:19:21,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10113, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10334, PETRI_PLACES=432, PETRI_TRANSITIONS=550} [2024-06-27 21:19:21,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 21:19:21,611 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 550 transitions, 10334 flow [2024-06-27 21:19:21,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:21,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:21,611 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 21:19:21,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:19:21,611 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 21:19:21,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2075613963, now seen corresponding path program 4 times [2024-06-27 21:19:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:21,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878099705] [2024-06-27 21:19:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:21,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:24,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878099705] [2024-06-27 21:19:24,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878099705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:24,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:24,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:24,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832747523] [2024-06-27 21:19:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:24,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:24,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 550 transitions, 10334 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 21:19:24,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:24,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:24,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:26,795 INFO L124 PetriNetUnfolderBase]: 3253/5280 cut-off events. [2024-06-27 21:19:26,795 INFO L125 PetriNetUnfolderBase]: For 1067844/1067850 co-relation queries the response was YES. [2024-06-27 21:19:26,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50859 conditions, 5280 events. 3253/5280 cut-off events. For 1067844/1067850 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32488 event pairs, 461 based on Foata normal form. 14/5292 useless extension candidates. Maximal degree in co-relation 50656. Up to 4453 conditions per place. [2024-06-27 21:19:26,883 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 511 selfloop transitions, 80 changer transitions 0/596 dead transitions. [2024-06-27 21:19:26,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 596 transitions, 11690 flow [2024-06-27 21:19:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:19:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:19:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:19:26,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:19:26,885 INFO L175 Difference]: Start difference. First operand has 432 places, 550 transitions, 10334 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:19:26,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 596 transitions, 11690 flow [2024-06-27 21:19:31,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 596 transitions, 11391 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 21:19:31,610 INFO L231 Difference]: Finished difference. Result has 430 places, 550 transitions, 10205 flow [2024-06-27 21:19:31,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10035, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10205, PETRI_PLACES=430, PETRI_TRANSITIONS=550} [2024-06-27 21:19:31,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-27 21:19:31,611 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 550 transitions, 10205 flow [2024-06-27 21:19:31,611 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 21:19:31,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:31,611 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 21:19:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:19:31,611 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 21:19:31,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash -369800677, now seen corresponding path program 11 times [2024-06-27 21:19:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:31,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103929827] [2024-06-27 21:19:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:34,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103929827] [2024-06-27 21:19:34,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103929827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:34,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:34,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:34,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809536715] [2024-06-27 21:19:34,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:34,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:34,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 550 transitions, 10205 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:34,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:34,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:34,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:36,639 INFO L124 PetriNetUnfolderBase]: 3258/5287 cut-off events. [2024-06-27 21:19:36,639 INFO L125 PetriNetUnfolderBase]: For 1035121/1035146 co-relation queries the response was YES. [2024-06-27 21:19:36,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51060 conditions, 5287 events. 3258/5287 cut-off events. For 1035121/1035146 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 32634 event pairs, 694 based on Foata normal form. 9/5279 useless extension candidates. Maximal degree in co-relation 50856. Up to 4475 conditions per place. [2024-06-27 21:19:36,729 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 374 selfloop transitions, 201 changer transitions 0/580 dead transitions. [2024-06-27 21:19:36,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 580 transitions, 11983 flow [2024-06-27 21:19:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:19:36,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 21:19:36,730 INFO L175 Difference]: Start difference. First operand has 430 places, 550 transitions, 10205 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:19:36,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 580 transitions, 11983 flow [2024-06-27 21:19:41,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 580 transitions, 11789 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 21:19:41,453 INFO L231 Difference]: Finished difference. Result has 429 places, 553 transitions, 10501 flow [2024-06-27 21:19:41,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10023, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10501, PETRI_PLACES=429, PETRI_TRANSITIONS=553} [2024-06-27 21:19:41,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-27 21:19:41,453 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 553 transitions, 10501 flow [2024-06-27 21:19:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:41,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:41,454 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 21:19:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:19:41,454 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 21:19:41,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1554276883, now seen corresponding path program 6 times [2024-06-27 21:19:41,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009775630] [2024-06-27 21:19:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:44,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:44,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009775630] [2024-06-27 21:19:44,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009775630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:44,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:44,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801401554] [2024-06-27 21:19:44,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:44,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:44,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 553 transitions, 10501 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:44,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:44,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:44,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:46,220 INFO L124 PetriNetUnfolderBase]: 3268/5316 cut-off events. [2024-06-27 21:19:46,221 INFO L125 PetriNetUnfolderBase]: For 1010317/1010352 co-relation queries the response was YES. [2024-06-27 21:19:46,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50848 conditions, 5316 events. 3268/5316 cut-off events. For 1010317/1010352 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 32932 event pairs, 651 based on Foata normal form. 26/5333 useless extension candidates. Maximal degree in co-relation 50645. Up to 4768 conditions per place. [2024-06-27 21:19:46,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 485 selfloop transitions, 93 changer transitions 0/583 dead transitions. [2024-06-27 21:19:46,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 583 transitions, 12036 flow [2024-06-27 21:19:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:19:46,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 21:19:46,309 INFO L175 Difference]: Start difference. First operand has 429 places, 553 transitions, 10501 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:19:46,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 583 transitions, 12036 flow [2024-06-27 21:19:51,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 583 transitions, 11202 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 21:19:51,146 INFO L231 Difference]: Finished difference. Result has 430 places, 556 transitions, 9924 flow [2024-06-27 21:19:51,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9669, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9924, PETRI_PLACES=430, PETRI_TRANSITIONS=556} [2024-06-27 21:19:51,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-27 21:19:51,147 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 556 transitions, 9924 flow [2024-06-27 21:19:51,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:51,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:51,147 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 21:19:51,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:19:51,147 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 21:19:51,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1554276511, now seen corresponding path program 12 times [2024-06-27 21:19:51,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:51,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051498686] [2024-06-27 21:19:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:51,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:53,938 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 21:19:53,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:53,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051498686] [2024-06-27 21:19:53,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051498686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:53,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:53,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:53,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060870489] [2024-06-27 21:19:53,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:53,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:53,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:53,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 556 transitions, 9924 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:53,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:53,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:53,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:56,255 INFO L124 PetriNetUnfolderBase]: 3273/5314 cut-off events. [2024-06-27 21:19:56,255 INFO L125 PetriNetUnfolderBase]: For 995194/995219 co-relation queries the response was YES. [2024-06-27 21:19:56,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50400 conditions, 5314 events. 3273/5314 cut-off events. For 995194/995219 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32862 event pairs, 696 based on Foata normal form. 9/5306 useless extension candidates. Maximal degree in co-relation 50197. Up to 4495 conditions per place. [2024-06-27 21:19:56,344 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 201 changer transitions 0/582 dead transitions. [2024-06-27 21:19:56,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 582 transitions, 11664 flow [2024-06-27 21:19:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:19:56,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:19:56,346 INFO L175 Difference]: Start difference. First operand has 430 places, 556 transitions, 9924 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:19:56,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 582 transitions, 11664 flow [2024-06-27 21:20:00,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 582 transitions, 11316 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 21:20:00,847 INFO L231 Difference]: Finished difference. Result has 430 places, 559 transitions, 10032 flow [2024-06-27 21:20:00,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9576, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10032, PETRI_PLACES=430, PETRI_TRANSITIONS=559} [2024-06-27 21:20:00,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-27 21:20:00,848 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 559 transitions, 10032 flow [2024-06-27 21:20:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:00,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:00,848 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 21:20:00,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:20:00,848 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 21:20:00,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1908955633, now seen corresponding path program 7 times [2024-06-27 21:20:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194614863] [2024-06-27 21:20:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:03,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:03,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194614863] [2024-06-27 21:20:03,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194614863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:03,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:03,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:03,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510303023] [2024-06-27 21:20:03,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:03,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:03,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:03,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:03,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:03,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:03,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 559 transitions, 10032 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:03,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:03,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:03,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:05,494 INFO L124 PetriNetUnfolderBase]: 3299/5359 cut-off events. [2024-06-27 21:20:05,495 INFO L125 PetriNetUnfolderBase]: For 1033058/1033093 co-relation queries the response was YES. [2024-06-27 21:20:05,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51031 conditions, 5359 events. 3299/5359 cut-off events. For 1033058/1033093 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33229 event pairs, 610 based on Foata normal form. 26/5376 useless extension candidates. Maximal degree in co-relation 50828. Up to 4502 conditions per place. [2024-06-27 21:20:05,580 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 423 selfloop transitions, 163 changer transitions 0/591 dead transitions. [2024-06-27 21:20:05,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 591 transitions, 11873 flow [2024-06-27 21:20:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:20:05,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:20:05,581 INFO L175 Difference]: Start difference. First operand has 430 places, 559 transitions, 10032 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:20:05,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 591 transitions, 11873 flow [2024-06-27 21:20:10,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 591 transitions, 11476 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:10,174 INFO L231 Difference]: Finished difference. Result has 433 places, 566 transitions, 10086 flow [2024-06-27 21:20:10,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9635, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10086, PETRI_PLACES=433, PETRI_TRANSITIONS=566} [2024-06-27 21:20:10,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 21:20:10,174 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 566 transitions, 10086 flow [2024-06-27 21:20:10,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:10,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:10,175 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 21:20:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:20:10,175 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 21:20:10,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1908539551, now seen corresponding path program 13 times [2024-06-27 21:20:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:10,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239671622] [2024-06-27 21:20:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239671622] [2024-06-27 21:20:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239671622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:12,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195452501] [2024-06-27 21:20:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:12,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:12,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:12,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 566 transitions, 10086 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:12,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:12,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:12,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:14,977 INFO L124 PetriNetUnfolderBase]: 3304/5363 cut-off events. [2024-06-27 21:20:14,977 INFO L125 PetriNetUnfolderBase]: For 1041749/1041774 co-relation queries the response was YES. [2024-06-27 21:20:15,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51212 conditions, 5363 events. 3304/5363 cut-off events. For 1041749/1041774 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33222 event pairs, 699 based on Foata normal form. 9/5355 useless extension candidates. Maximal degree in co-relation 51008. Up to 4537 conditions per place. [2024-06-27 21:20:15,066 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 208 changer transitions 0/588 dead transitions. [2024-06-27 21:20:15,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 588 transitions, 11837 flow [2024-06-27 21:20:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:20:15,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:20:15,067 INFO L175 Difference]: Start difference. First operand has 433 places, 566 transitions, 10086 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:20:15,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 588 transitions, 11837 flow [2024-06-27 21:20:19,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 588 transitions, 11641 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 21:20:19,324 INFO L231 Difference]: Finished difference. Result has 438 places, 569 transitions, 10363 flow [2024-06-27 21:20:19,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9890, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10363, PETRI_PLACES=438, PETRI_TRANSITIONS=569} [2024-06-27 21:20:19,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 21:20:19,324 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 569 transitions, 10363 flow [2024-06-27 21:20:19,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:19,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:19,324 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 21:20:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:20:19,325 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 21:20:19,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1908539923, now seen corresponding path program 8 times [2024-06-27 21:20:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:19,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107941397] [2024-06-27 21:20:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:19,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:21,793 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 21:20:21,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107941397] [2024-06-27 21:20:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107941397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:21,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:21,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:21,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766053761] [2024-06-27 21:20:21,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:21,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:21,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:21,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:21,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:21,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:21,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 569 transitions, 10363 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:21,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:21,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:21,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:23,934 INFO L124 PetriNetUnfolderBase]: 3298/5358 cut-off events. [2024-06-27 21:20:23,934 INFO L125 PetriNetUnfolderBase]: For 1053116/1053151 co-relation queries the response was YES. [2024-06-27 21:20:23,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51094 conditions, 5358 events. 3298/5358 cut-off events. For 1053116/1053151 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33237 event pairs, 647 based on Foata normal form. 26/5375 useless extension candidates. Maximal degree in co-relation 50888. Up to 4830 conditions per place. [2024-06-27 21:20:24,017 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 498 selfloop transitions, 86 changer transitions 0/589 dead transitions. [2024-06-27 21:20:24,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 589 transitions, 11591 flow [2024-06-27 21:20:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:20:24,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:20:24,018 INFO L175 Difference]: Start difference. First operand has 438 places, 569 transitions, 10363 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:20:24,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 589 transitions, 11591 flow [2024-06-27 21:20:28,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 589 transitions, 11203 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:20:28,414 INFO L231 Difference]: Finished difference. Result has 440 places, 569 transitions, 10153 flow [2024-06-27 21:20:28,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9975, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10153, PETRI_PLACES=440, PETRI_TRANSITIONS=569} [2024-06-27 21:20:28,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-27 21:20:28,415 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 569 transitions, 10153 flow [2024-06-27 21:20:28,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:28,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:28,415 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 21:20:28,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:20:28,415 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 21:20:28,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1366546639, now seen corresponding path program 14 times [2024-06-27 21:20:28,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:28,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040958898] [2024-06-27 21:20:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:28,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:31,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:31,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040958898] [2024-06-27 21:20:31,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040958898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:31,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:31,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:31,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370808888] [2024-06-27 21:20:31,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:31,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:31,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:31,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:31,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 569 transitions, 10153 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 21:20:31,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:31,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:31,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:34,066 INFO L124 PetriNetUnfolderBase]: 3295/5320 cut-off events. [2024-06-27 21:20:34,066 INFO L125 PetriNetUnfolderBase]: For 1054390/1054398 co-relation queries the response was YES. [2024-06-27 21:20:34,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50718 conditions, 5320 events. 3295/5320 cut-off events. For 1054390/1054398 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32720 event pairs, 715 based on Foata normal form. 2/5300 useless extension candidates. Maximal degree in co-relation 50511. Up to 4526 conditions per place. [2024-06-27 21:20:34,157 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 221 changer transitions 0/601 dead transitions. [2024-06-27 21:20:34,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 601 transitions, 11925 flow [2024-06-27 21:20:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:20:34,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:20:34,158 INFO L175 Difference]: Start difference. First operand has 440 places, 569 transitions, 10153 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:20:34,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 601 transitions, 11925 flow [2024-06-27 21:20:39,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 601 transitions, 11731 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:20:39,106 INFO L231 Difference]: Finished difference. Result has 442 places, 569 transitions, 10407 flow [2024-06-27 21:20:39,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9959, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10407, PETRI_PLACES=442, PETRI_TRANSITIONS=569} [2024-06-27 21:20:39,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-27 21:20:39,106 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 569 transitions, 10407 flow [2024-06-27 21:20:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:39,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:39,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:20:39,107 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:39,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash -715470933, now seen corresponding path program 8 times [2024-06-27 21:20:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:39,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638417181] [2024-06-27 21:20:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638417181] [2024-06-27 21:20:42,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638417181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:42,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:42,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:42,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157602770] [2024-06-27 21:20:42,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:42,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:42,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:42,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 569 transitions, 10407 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 21:20:42,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:42,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:42,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:44,447 INFO L124 PetriNetUnfolderBase]: 3305/5335 cut-off events. [2024-06-27 21:20:44,448 INFO L125 PetriNetUnfolderBase]: For 1082470/1082478 co-relation queries the response was YES. [2024-06-27 21:20:44,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51434 conditions, 5335 events. 3305/5335 cut-off events. For 1082470/1082478 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 32832 event pairs, 724 based on Foata normal form. 3/5314 useless extension candidates. Maximal degree in co-relation 51226. Up to 4491 conditions per place. [2024-06-27 21:20:44,537 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 367 selfloop transitions, 236 changer transitions 0/608 dead transitions. [2024-06-27 21:20:44,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 608 transitions, 12403 flow [2024-06-27 21:20:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 21:20:44,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-27 21:20:44,539 INFO L175 Difference]: Start difference. First operand has 442 places, 569 transitions, 10407 flow. Second operand 11 states and 181 transitions. [2024-06-27 21:20:44,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 608 transitions, 12403 flow [2024-06-27 21:20:49,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 608 transitions, 11515 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-27 21:20:49,317 INFO L231 Difference]: Finished difference. Result has 441 places, 575 transitions, 10211 flow [2024-06-27 21:20:49,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9519, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10211, PETRI_PLACES=441, PETRI_TRANSITIONS=575} [2024-06-27 21:20:49,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-27 21:20:49,318 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 575 transitions, 10211 flow [2024-06-27 21:20:49,318 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 21:20:49,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:49,318 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 21:20:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:20:49,318 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 21:20:49,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash 589063623, now seen corresponding path program 15 times [2024-06-27 21:20:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:49,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661258544] [2024-06-27 21:20:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:49,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:52,383 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 21:20:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:52,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661258544] [2024-06-27 21:20:52,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661258544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:52,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990859568] [2024-06-27 21:20:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:52,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:52,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:52,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:52,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 575 transitions, 10211 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 21:20:52,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:52,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:52,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:54,929 INFO L124 PetriNetUnfolderBase]: 3310/5346 cut-off events. [2024-06-27 21:20:54,929 INFO L125 PetriNetUnfolderBase]: For 1086642/1086650 co-relation queries the response was YES. [2024-06-27 21:20:54,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51174 conditions, 5346 events. 3310/5346 cut-off events. For 1086642/1086650 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32960 event pairs, 727 based on Foata normal form. 2/5324 useless extension candidates. Maximal degree in co-relation 50968. Up to 4546 conditions per place. [2024-06-27 21:20:55,021 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 224 changer transitions 0/605 dead transitions. [2024-06-27 21:20:55,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 605 transitions, 11792 flow [2024-06-27 21:20:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:20:55,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:20:55,022 INFO L175 Difference]: Start difference. First operand has 441 places, 575 transitions, 10211 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:20:55,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 605 transitions, 11792 flow [2024-06-27 21:21:00,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 605 transitions, 11200 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-27 21:21:00,583 INFO L231 Difference]: Finished difference. Result has 442 places, 578 transitions, 10130 flow [2024-06-27 21:21:00,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9625, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10130, PETRI_PLACES=442, PETRI_TRANSITIONS=578} [2024-06-27 21:21:00,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-27 21:21:00,584 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 578 transitions, 10130 flow [2024-06-27 21:21:00,584 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 21:21:00,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:00,584 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 21:21:00,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:21:00,585 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 21:21:00,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:00,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1103292363, now seen corresponding path program 16 times [2024-06-27 21:21:00,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:00,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450671017] [2024-06-27 21:21:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:00,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:03,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:03,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450671017] [2024-06-27 21:21:03,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450671017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:03,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:03,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001107685] [2024-06-27 21:21:03,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:03,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:21:03,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 578 transitions, 10130 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 21:21:03,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:03,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:21:03,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:06,708 INFO L124 PetriNetUnfolderBase]: 3323/5361 cut-off events. [2024-06-27 21:21:06,708 INFO L125 PetriNetUnfolderBase]: For 1107364/1107372 co-relation queries the response was YES. [2024-06-27 21:21:06,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51281 conditions, 5361 events. 3323/5361 cut-off events. For 1107364/1107372 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 32992 event pairs, 724 based on Foata normal form. 2/5339 useless extension candidates. Maximal degree in co-relation 51074. Up to 4561 conditions per place. [2024-06-27 21:21:06,795 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 228 changer transitions 0/608 dead transitions. [2024-06-27 21:21:06,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 608 transitions, 12018 flow [2024-06-27 21:21:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:21:06,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:21:06,796 INFO L175 Difference]: Start difference. First operand has 442 places, 578 transitions, 10130 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:21:06,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 608 transitions, 12018 flow [2024-06-27 21:21:11,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 608 transitions, 11721 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:21:11,219 INFO L231 Difference]: Finished difference. Result has 445 places, 584 transitions, 10409 flow [2024-06-27 21:21:11,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9839, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10409, PETRI_PLACES=445, PETRI_TRANSITIONS=584} [2024-06-27 21:21:11,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-27 21:21:11,220 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 584 transitions, 10409 flow [2024-06-27 21:21:11,220 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 21:21:11,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:11,220 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 21:21:11,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:21:11,220 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 21:21:11,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1159221631, now seen corresponding path program 9 times [2024-06-27 21:21:11,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:11,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692809264] [2024-06-27 21:21:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:11,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692809264] [2024-06-27 21:21:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692809264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:14,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299270856] [2024-06-27 21:21:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:14,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:21:14,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 584 transitions, 10409 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 21:21:14,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:14,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:21:14,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:16,879 INFO L124 PetriNetUnfolderBase]: 3349/5390 cut-off events. [2024-06-27 21:21:16,880 INFO L125 PetriNetUnfolderBase]: For 1154626/1154634 co-relation queries the response was YES. [2024-06-27 21:21:16,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52104 conditions, 5390 events. 3349/5390 cut-off events. For 1154626/1154634 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33114 event pairs, 725 based on Foata normal form. 3/5369 useless extension candidates. Maximal degree in co-relation 51895. Up to 4537 conditions per place. [2024-06-27 21:21:16,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 246 changer transitions 0/619 dead transitions. [2024-06-27 21:21:16,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 619 transitions, 12617 flow [2024-06-27 21:21:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:21:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:21:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:21:16,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 21:21:16,975 INFO L175 Difference]: Start difference. First operand has 445 places, 584 transitions, 10409 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:21:16,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 619 transitions, 12617 flow [2024-06-27 21:21:22,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 619 transitions, 12318 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:22,011 INFO L231 Difference]: Finished difference. Result has 450 places, 590 transitions, 10752 flow [2024-06-27 21:21:22,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10110, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10752, PETRI_PLACES=450, PETRI_TRANSITIONS=590} [2024-06-27 21:21:22,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-27 21:21:22,011 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 590 transitions, 10752 flow [2024-06-27 21:21:22,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:21:22,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:22,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:21:22,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:21:22,012 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:22,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1932394109, now seen corresponding path program 9 times [2024-06-27 21:21:22,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:22,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957215395] [2024-06-27 21:21:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:25,034 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 21:21:25,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:25,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957215395] [2024-06-27 21:21:25,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957215395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:25,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:25,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:25,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833633071] [2024-06-27 21:21:25,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:25,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:25,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:25,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:25,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:21:25,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 590 transitions, 10752 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 21:21:25,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:25,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:21:25,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:27,694 INFO L124 PetriNetUnfolderBase]: 3375/5455 cut-off events. [2024-06-27 21:21:27,695 INFO L125 PetriNetUnfolderBase]: For 1189859/1189877 co-relation queries the response was YES. [2024-06-27 21:21:27,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52954 conditions, 5455 events. 3375/5455 cut-off events. For 1189859/1189877 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33685 event pairs, 650 based on Foata normal form. 14/5459 useless extension candidates. Maximal degree in co-relation 52743. Up to 4908 conditions per place. [2024-06-27 21:21:27,777 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 518 selfloop transitions, 105 changer transitions 0/628 dead transitions. [2024-06-27 21:21:27,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 628 transitions, 12462 flow [2024-06-27 21:21:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:21:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:21:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-27 21:21:27,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 21:21:27,779 INFO L175 Difference]: Start difference. First operand has 450 places, 590 transitions, 10752 flow. Second operand 12 states and 186 transitions. [2024-06-27 21:21:27,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 628 transitions, 12462 flow [2024-06-27 21:21:32,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 628 transitions, 11943 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:21:32,742 INFO L231 Difference]: Finished difference. Result has 456 places, 596 transitions, 10575 flow [2024-06-27 21:21:32,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10233, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10575, PETRI_PLACES=456, PETRI_TRANSITIONS=596} [2024-06-27 21:21:32,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-27 21:21:32,743 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 596 transitions, 10575 flow [2024-06-27 21:21:32,743 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 21:21:32,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:32,743 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 21:21:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:21:32,743 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:32,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1114435313, now seen corresponding path program 17 times [2024-06-27 21:21:32,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:32,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334328860] [2024-06-27 21:21:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:32,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:36,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:36,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334328860] [2024-06-27 21:21:36,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334328860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:36,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:36,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:36,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818347373] [2024-06-27 21:21:36,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:36,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:36,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:36,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:21:36,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 596 transitions, 10575 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 21:21:36,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:36,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:21:36,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:38,705 INFO L124 PetriNetUnfolderBase]: 3372/5431 cut-off events. [2024-06-27 21:21:38,706 INFO L125 PetriNetUnfolderBase]: For 1189690/1189698 co-relation queries the response was YES. [2024-06-27 21:21:38,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52457 conditions, 5431 events. 3372/5431 cut-off events. For 1189690/1189698 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33460 event pairs, 729 based on Foata normal form. 2/5409 useless extension candidates. Maximal degree in co-relation 52245. Up to 4630 conditions per place. [2024-06-27 21:21:38,791 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 228 changer transitions 0/619 dead transitions. [2024-06-27 21:21:38,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 619 transitions, 12123 flow [2024-06-27 21:21:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:21:38,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:21:38,793 INFO L175 Difference]: Start difference. First operand has 456 places, 596 transitions, 10575 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:21:38,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 619 transitions, 12123 flow [2024-06-27 21:21:43,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 619 transitions, 11954 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 21:21:43,732 INFO L231 Difference]: Finished difference. Result has 458 places, 596 transitions, 10868 flow [2024-06-27 21:21:43,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10406, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10868, PETRI_PLACES=458, PETRI_TRANSITIONS=596} [2024-06-27 21:21:43,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-27 21:21:43,733 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 596 transitions, 10868 flow [2024-06-27 21:21:43,733 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 21:21:43,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:43,733 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 21:21:43,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:21:43,733 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:43,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:43,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1159210471, now seen corresponding path program 10 times [2024-06-27 21:21:43,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:43,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273689403] [2024-06-27 21:21:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:43,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:46,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:46,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273689403] [2024-06-27 21:21:46,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273689403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:46,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:46,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:46,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235981266] [2024-06-27 21:21:46,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:46,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:46,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:46,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:46,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:21:46,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 596 transitions, 10868 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 21:21:46,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:46,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:21:46,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:49,310 INFO L124 PetriNetUnfolderBase]: 3366/5426 cut-off events. [2024-06-27 21:21:49,310 INFO L125 PetriNetUnfolderBase]: For 1200735/1200743 co-relation queries the response was YES. [2024-06-27 21:21:49,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52725 conditions, 5426 events. 3366/5426 cut-off events. For 1200735/1200743 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33467 event pairs, 727 based on Foata normal form. 3/5405 useless extension candidates. Maximal degree in co-relation 52511. Up to 4565 conditions per place. [2024-06-27 21:21:49,395 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 247 changer transitions 0/627 dead transitions. [2024-06-27 21:21:49,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 627 transitions, 12710 flow [2024-06-27 21:21:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:21:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:21:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-27 21:21:49,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38293650793650796 [2024-06-27 21:21:49,396 INFO L175 Difference]: Start difference. First operand has 458 places, 596 transitions, 10868 flow. Second operand 12 states and 193 transitions. [2024-06-27 21:21:49,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 627 transitions, 12710 flow [2024-06-27 21:21:54,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 627 transitions, 12011 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 21:21:54,708 INFO L231 Difference]: Finished difference. Result has 461 places, 596 transitions, 10669 flow [2024-06-27 21:21:54,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10169, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10669, PETRI_PLACES=461, PETRI_TRANSITIONS=596} [2024-06-27 21:21:54,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 21:21:54,709 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 596 transitions, 10669 flow [2024-06-27 21:21:54,709 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 21:21:54,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:54,709 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 21:21:54,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:21:54,709 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:54,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1159221817, now seen corresponding path program 10 times [2024-06-27 21:21:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:54,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452231432] [2024-06-27 21:21:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:54,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:21:57,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:57,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452231432] [2024-06-27 21:21:57,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452231432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:57,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:57,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:57,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870924244] [2024-06-27 21:21:57,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:57,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:57,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:57,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:21:57,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 596 transitions, 10669 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 21:21:57,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:57,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:21:57,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:00,447 INFO L124 PetriNetUnfolderBase]: 3360/5445 cut-off events. [2024-06-27 21:22:00,448 INFO L125 PetriNetUnfolderBase]: For 1192550/1192568 co-relation queries the response was YES. [2024-06-27 21:22:00,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52455 conditions, 5445 events. 3360/5445 cut-off events. For 1192550/1192568 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33806 event pairs, 651 based on Foata normal form. 14/5449 useless extension candidates. Maximal degree in co-relation 52241. Up to 4891 conditions per place. [2024-06-27 21:22:00,530 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 105 changer transitions 0/627 dead transitions. [2024-06-27 21:22:00,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 627 transitions, 11999 flow [2024-06-27 21:22:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:22:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:22:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-27 21:22:00,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36706349206349204 [2024-06-27 21:22:00,531 INFO L175 Difference]: Start difference. First operand has 461 places, 596 transitions, 10669 flow. Second operand 12 states and 185 transitions. [2024-06-27 21:22:00,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 627 transitions, 11999 flow [2024-06-27 21:22:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 627 transitions, 11483 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 21:22:05,686 INFO L231 Difference]: Finished difference. Result has 461 places, 596 transitions, 10369 flow [2024-06-27 21:22:05,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10153, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10369, PETRI_PLACES=461, PETRI_TRANSITIONS=596} [2024-06-27 21:22:05,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 21:22:05,686 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 596 transitions, 10369 flow [2024-06-27 21:22:05,687 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 21:22:05,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:05,687 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 21:22:05,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:22:05,687 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:05,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash -589262943, now seen corresponding path program 11 times [2024-06-27 21:22:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027977655] [2024-06-27 21:22:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15