./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:02:26,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:02:26,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:02:26,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:02:26,124 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:02:26,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:02:26,167 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:02:26,168 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:02:26,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:02:26,172 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:02:26,173 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:02:26,173 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:02:26,174 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:02:26,175 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:02:26,175 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:02:26,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:02:26,176 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:02:26,176 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:02:26,177 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:02:26,177 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:02:26,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:02:26,178 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:02:26,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:02:26,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:02:26,179 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:02:26,179 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:02:26,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:02:26,179 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:02:26,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:02:26,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:02:26,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:02:26,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:02:26,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:02:26,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:02:26,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:02:26,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:02:26,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:02:26,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:02:26,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:02:26,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:02:26,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:02:26,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:02:26,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:02:26,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:02:26,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:02:26,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:02:26,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:02:26,445 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:02:26,446 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:02:26,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-27 21:02:27,615 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:02:27,883 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:02:27,884 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.opt.i [2024-06-27 21:02:27,900 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb1e56174/20473b65015d4a7b91d03628ee507c2e/FLAGdca1fd875 [2024-06-27 21:02:27,911 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb1e56174/20473b65015d4a7b91d03628ee507c2e [2024-06-27 21:02:27,913 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:02:27,914 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:02:27,915 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.opt.yml/witness.yml [2024-06-27 21:02:28,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:02:28,145 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:02:28,155 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:02:28,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:02:28,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:02:28,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:02:27" (1/2) ... [2024-06-27 21:02:28,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6dc903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:02:28, skipping insertion in model container [2024-06-27 21:02:28,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:02:27" (1/2) ... [2024-06-27 21:02:28,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61bdbde8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:02:28, skipping insertion in model container [2024-06-27 21:02:28,164 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:02:28" (2/2) ... [2024-06-27 21:02:28,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6dc903 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:02:28, skipping insertion in model container [2024-06-27 21:02:28,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:02:28" (2/2) ... [2024-06-27 21:02:28,165 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:02:28,292 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:02:28,294 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-27 21:02:28,294 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-27 21:02:28,294 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0) [2024-06-27 21:02:28,294 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:02:28,294 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-27 21:02:28,336 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:02:28,691 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:02:28,701 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:02:28,844 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:02:28,876 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:02:28,877 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:02:28 WrapperNode [2024-06-27 21:02:28,877 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:02:28,878 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:02:28,878 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:02:28,878 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:02:28,885 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 09:02:28" (1/1) ... [2024-06-27 21:02:28,910 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 09:02:28" (1/1) ... [2024-06-27 21:02:28,940 INFO L138 Inliner]: procedures = 175, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 171 [2024-06-27 21:02:28,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:02:28,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:02:28,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:02:28,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:02:28,962 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 09:02:28" (1/1) ... [2024-06-27 21:02:28,963 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 09:02:28" (1/1) ... [2024-06-27 21:02:28,967 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 09:02:28" (1/1) ... [2024-06-27 21:02:28,987 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 21:02:28,996 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 09:02:28" (1/1) ... [2024-06-27 21:02:28,997 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 09:02:28" (1/1) ... [2024-06-27 21:02:29,012 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 09:02:28" (1/1) ... [2024-06-27 21:02:29,026 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 09:02:28" (1/1) ... [2024-06-27 21:02:29,040 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 09:02:28" (1/1) ... [2024-06-27 21:02:29,042 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 09:02:28" (1/1) ... [2024-06-27 21:02:29,046 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:02:29,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:02:29,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:02:29,047 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:02:29,047 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 09:02:28" (1/1) ... [2024-06-27 21:02:29,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:02:29,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:02:29,081 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 21:02:29,104 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 21:02:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:02:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:02:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:02:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:02:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:02:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:02:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:02:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:02:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:02:29,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:02:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:02:29,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:02:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:02:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:02:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:02:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:02:29,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:02:29,128 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 21:02:29,313 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:02:29,316 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:02:29,864 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:02:29,865 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:02:30,237 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:02:30,238 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:02:30,239 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:02:30 BoogieIcfgContainer [2024-06-27 21:02:30,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:02:30,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:02:30,242 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:02:30,245 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:02:30,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:02:27" (1/4) ... [2024-06-27 21:02:30,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d30899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:02:30, skipping insertion in model container [2024-06-27 21:02:30,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:02:28" (2/4) ... [2024-06-27 21:02:30,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d30899 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:02:30, skipping insertion in model container [2024-06-27 21:02:30,246 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 09:02:28" (3/4) ... [2024-06-27 21:02:30,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d30899 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:02:30, skipping insertion in model container [2024-06-27 21:02:30,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:02:30" (4/4) ... [2024-06-27 21:02:30,248 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.opt.i [2024-06-27 21:02:30,264 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:02:30,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:02:30,265 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:02:30,328 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:02:30,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:02:30,424 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:02:30,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:02:30,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:02:30,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:02:30,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:02:30,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:02:30,452 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;@77079f16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:02:30,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:02:30,459 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:02:30,460 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:02:30,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:02:30,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:30,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:02:30,462 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 21:02:30,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash 648653528, now seen corresponding path program 1 times [2024-06-27 21:02:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775663847] [2024-06-27 21:02:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:32,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775663847] [2024-06-27 21:02:32,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775663847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:32,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:32,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:02:32,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913212844] [2024-06-27 21:02:32,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:02:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:02:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:02:32,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:02:32,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:32,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:32,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:02:32,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:33,556 INFO L124 PetriNetUnfolderBase]: 1205/1833 cut-off events. [2024-06-27 21:02:33,556 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 21:02:33,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3738 conditions, 1833 events. 1205/1833 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8291 event pairs, 800 based on Foata normal form. 1/1798 useless extension candidates. Maximal degree in co-relation 3726. Up to 1818 conditions per place. [2024-06-27 21:02:33,573 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 21:02:33,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 181 flow [2024-06-27 21:02:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:02:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:02:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-27 21:02:33,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-27 21:02:33,588 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 66 transitions. [2024-06-27 21:02:33,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 181 flow [2024-06-27 21:02:33,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:02:33,594 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:02:33,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:02:33,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:02:33,600 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:02:33,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:33,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:33,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:33,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:02:33,601 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 21:02:33,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash 984473412, now seen corresponding path program 1 times [2024-06-27 21:02:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:33,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102321584] [2024-06-27 21:02:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:33,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:36,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:36,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102321584] [2024-06-27 21:02:36,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102321584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:36,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:36,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:02:36,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672736094] [2024-06-27 21:02:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:36,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:02:36,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:36,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:02:36,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:02:36,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:36,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:36,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:36,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:36,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:37,141 INFO L124 PetriNetUnfolderBase]: 1454/2199 cut-off events. [2024-06-27 21:02:37,142 INFO L125 PetriNetUnfolderBase]: For 387/392 co-relation queries the response was YES. [2024-06-27 21:02:37,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 2199 events. 1454/2199 cut-off events. For 387/392 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9870 event pairs, 628 based on Foata normal form. 10/2206 useless extension candidates. Maximal degree in co-relation 5045. Up to 2126 conditions per place. [2024-06-27 21:02:37,153 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-27 21:02:37,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 266 flow [2024-06-27 21:02:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:02:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:02:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-27 21:02:37,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-27 21:02:37,156 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 85 transitions. [2024-06-27 21:02:37,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 266 flow [2024-06-27 21:02:37,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:02:37,158 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 21:02:37,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 21:02:37,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 21:02:37,159 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 21:02:37,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:37,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:37,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:02:37,160 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 21:02:37,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1186190819, now seen corresponding path program 1 times [2024-06-27 21:02:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:37,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587036069] [2024-06-27 21:02:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:37,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:41,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:41,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587036069] [2024-06-27 21:02:41,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587036069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:41,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:41,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:02:41,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452896699] [2024-06-27 21:02:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:41,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:02:41,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:02:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:02:41,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:41,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:41,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:41,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:41,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:42,353 INFO L124 PetriNetUnfolderBase]: 1445/2184 cut-off events. [2024-06-27 21:02:42,353 INFO L125 PetriNetUnfolderBase]: For 1102/1112 co-relation queries the response was YES. [2024-06-27 21:02:42,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2184 events. 1445/2184 cut-off events. For 1102/1112 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9733 event pairs, 483 based on Foata normal form. 14/2195 useless extension candidates. Maximal degree in co-relation 5549. Up to 2073 conditions per place. [2024-06-27 21:02:42,367 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 52 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-27 21:02:42,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 326 flow [2024-06-27 21:02:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:02:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:02:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-27 21:02:42,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-27 21:02:42,372 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 99 transitions. [2024-06-27 21:02:42,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 326 flow [2024-06-27 21:02:42,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:02:42,377 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 157 flow [2024-06-27 21:02:42,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-06-27 21:02:42,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-27 21:02:42,378 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 157 flow [2024-06-27 21:02:42,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:42,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:42,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:42,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:02:42,380 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 21:02:42,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash -185868224, now seen corresponding path program 1 times [2024-06-27 21:02:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:42,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198065539] [2024-06-27 21:02:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:42,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:44,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198065539] [2024-06-27 21:02:44,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198065539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:44,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:44,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:02:44,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882439697] [2024-06-27 21:02:44,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:44,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:02:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:02:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:02:44,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:44,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 157 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:44,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:44,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:44,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:45,268 INFO L124 PetriNetUnfolderBase]: 1179/1793 cut-off events. [2024-06-27 21:02:45,268 INFO L125 PetriNetUnfolderBase]: For 1667/1667 co-relation queries the response was YES. [2024-06-27 21:02:45,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4952 conditions, 1793 events. 1179/1793 cut-off events. For 1667/1667 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8104 event pairs, 604 based on Foata normal form. 2/1792 useless extension candidates. Maximal degree in co-relation 4936. Up to 1767 conditions per place. [2024-06-27 21:02:45,277 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 44 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-27 21:02:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 309 flow [2024-06-27 21:02:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:02:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:02:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-27 21:02:45,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-27 21:02:45,279 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 157 flow. Second operand 5 states and 84 transitions. [2024-06-27 21:02:45,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 309 flow [2024-06-27 21:02:45,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 286 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:02:45,285 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 178 flow [2024-06-27 21:02:45,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 21:02:45,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-27 21:02:45,286 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 178 flow [2024-06-27 21:02:45,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:45,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:45,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:45,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:02:45,288 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 21:02:45,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1466945695, now seen corresponding path program 1 times [2024-06-27 21:02:45,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:45,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637779687] [2024-06-27 21:02:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:45,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637779687] [2024-06-27 21:02:47,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637779687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:47,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:47,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:02:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490038039] [2024-06-27 21:02:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:02:47,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:02:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:02:47,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:02:47,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:47,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:47,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:02:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:48,954 INFO L124 PetriNetUnfolderBase]: 1453/2194 cut-off events. [2024-06-27 21:02:48,955 INFO L125 PetriNetUnfolderBase]: For 2939/2939 co-relation queries the response was YES. [2024-06-27 21:02:48,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 2194 events. 1453/2194 cut-off events. For 2939/2939 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9817 event pairs, 632 based on Foata normal form. 8/2200 useless extension candidates. Maximal degree in co-relation 6391. Up to 2077 conditions per place. [2024-06-27 21:02:48,970 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-27 21:02:48,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 83 transitions, 481 flow [2024-06-27 21:02:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:02:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:02:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:02:48,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:02:48,977 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 178 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:02:48,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 83 transitions, 481 flow [2024-06-27 21:02:48,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 450 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:02:48,988 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 275 flow [2024-06-27 21:02:48,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-06-27 21:02:48,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-27 21:02:48,991 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 275 flow [2024-06-27 21:02:48,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:48,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:48,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:48,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:02:48,992 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 21:02:48,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2023355286, now seen corresponding path program 1 times [2024-06-27 21:02:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:48,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789047073] [2024-06-27 21:02:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:48,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789047073] [2024-06-27 21:02:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789047073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:51,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:51,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:02:51,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570436831] [2024-06-27 21:02:51,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:51,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:02:51,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:02:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:02:51,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:02:51,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 275 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:51,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:51,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:02:51,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:52,947 INFO L124 PetriNetUnfolderBase]: 1479/2236 cut-off events. [2024-06-27 21:02:52,948 INFO L125 PetriNetUnfolderBase]: For 4751/4771 co-relation queries the response was YES. [2024-06-27 21:02:52,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7464 conditions, 2236 events. 1479/2236 cut-off events. For 4751/4771 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10027 event pairs, 535 based on Foata normal form. 19/2252 useless extension candidates. Maximal degree in co-relation 7443. Up to 2077 conditions per place. [2024-06-27 21:02:52,963 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-27 21:02:52,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 90 transitions, 587 flow [2024-06-27 21:02:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:02:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:02:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:02:52,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:02:52,966 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 275 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:02:52,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 90 transitions, 587 flow [2024-06-27 21:02:52,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 577 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 21:02:52,974 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 357 flow [2024-06-27 21:02:52,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-06-27 21:02:52,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-27 21:02:52,976 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 357 flow [2024-06-27 21:02:52,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:52,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:52,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:52,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:02:52,977 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 21:02:52,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash 838002046, now seen corresponding path program 1 times [2024-06-27 21:02:52,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:52,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703362670] [2024-06-27 21:02:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:55,714 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 21:02:55,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:55,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703362670] [2024-06-27 21:02:55,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703362670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:55,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:02:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745921216] [2024-06-27 21:02:55,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:55,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:02:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:02:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:02:55,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:02:55,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 357 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:55,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:55,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:02:55,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:57,390 INFO L124 PetriNetUnfolderBase]: 1597/2400 cut-off events. [2024-06-27 21:02:57,390 INFO L125 PetriNetUnfolderBase]: For 6761/6771 co-relation queries the response was YES. [2024-06-27 21:02:57,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8621 conditions, 2400 events. 1597/2400 cut-off events. For 6761/6771 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10795 event pairs, 582 based on Foata normal form. 16/2413 useless extension candidates. Maximal degree in co-relation 8597. Up to 2153 conditions per place. [2024-06-27 21:02:57,403 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2024-06-27 21:02:57,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 723 flow [2024-06-27 21:02:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:02:57,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:02:57,406 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 357 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:02:57,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 723 flow [2024-06-27 21:02:57,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 696 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 21:02:57,414 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 526 flow [2024-06-27 21:02:57,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=526, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-06-27 21:02:57,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-27 21:02:57,415 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 526 flow [2024-06-27 21:02:57,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:57,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:57,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:02:57,416 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 21:02:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 820444390, now seen corresponding path program 2 times [2024-06-27 21:02:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438288382] [2024-06-27 21:02:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:59,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:59,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438288382] [2024-06-27 21:02:59,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438288382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:59,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:02:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683795740] [2024-06-27 21:02:59,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:59,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:02:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:02:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:02:59,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:02:59,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:59,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:59,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:02:59,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:00,536 INFO L124 PetriNetUnfolderBase]: 1587/2386 cut-off events. [2024-06-27 21:03:00,537 INFO L125 PetriNetUnfolderBase]: For 9365/9375 co-relation queries the response was YES. [2024-06-27 21:03:00,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9673 conditions, 2386 events. 1587/2386 cut-off events. For 9365/9375 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10680 event pairs, 649 based on Foata normal form. 12/2395 useless extension candidates. Maximal degree in co-relation 9645. Up to 2301 conditions per place. [2024-06-27 21:03:00,550 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 78 selfloop transitions, 13 changer transitions 0/94 dead transitions. [2024-06-27 21:03:00,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 756 flow [2024-06-27 21:03:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 21:03:00,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-27 21:03:00,552 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 526 flow. Second operand 6 states and 97 transitions. [2024-06-27 21:03:00,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 756 flow [2024-06-27 21:03:00,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 717 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:00,562 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 521 flow [2024-06-27 21:03:00,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-27 21:03:00,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 21:03:00,563 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 521 flow [2024-06-27 21:03:00,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:00,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:00,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:03:00,564 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 21:03:00,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -985485216, now seen corresponding path program 2 times [2024-06-27 21:03:00,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:00,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774466369] [2024-06-27 21:03:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:03,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774466369] [2024-06-27 21:03:03,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774466369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:03,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:03,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:03,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527623945] [2024-06-27 21:03:03,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:03,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:03,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:03,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:03,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:03,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:03,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:04,789 INFO L124 PetriNetUnfolderBase]: 1637/2456 cut-off events. [2024-06-27 21:03:04,789 INFO L125 PetriNetUnfolderBase]: For 10894/10902 co-relation queries the response was YES. [2024-06-27 21:03:04,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 2456 events. 1637/2456 cut-off events. For 10894/10902 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11170 event pairs, 587 based on Foata normal form. 14/2467 useless extension candidates. Maximal degree in co-relation 10053. Up to 2059 conditions per place. [2024-06-27 21:03:04,806 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 77 selfloop transitions, 42 changer transitions 0/122 dead transitions. [2024-06-27 21:03:04,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 122 transitions, 997 flow [2024-06-27 21:03:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:03:04,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:03:04,808 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 521 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:03:04,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 122 transitions, 997 flow [2024-06-27 21:03:04,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 122 transitions, 949 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:04,823 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 730 flow [2024-06-27 21:03:04,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=730, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-27 21:03:04,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-27 21:03:04,824 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 730 flow [2024-06-27 21:03:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:04,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:04,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:04,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:03:04,825 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 21:03:04,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -985476288, now seen corresponding path program 1 times [2024-06-27 21:03:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:04,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22331555] [2024-06-27 21:03:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:04,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22331555] [2024-06-27 21:03:08,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22331555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:08,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:08,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:08,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028432399] [2024-06-27 21:03:08,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:08,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:08,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:08,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:08,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 730 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:08,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:08,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:08,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:09,286 INFO L124 PetriNetUnfolderBase]: 1689/2538 cut-off events. [2024-06-27 21:03:09,286 INFO L125 PetriNetUnfolderBase]: For 13132/13132 co-relation queries the response was YES. [2024-06-27 21:03:09,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11120 conditions, 2538 events. 1689/2538 cut-off events. For 13132/13132 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11575 event pairs, 594 based on Foata normal form. 16/2552 useless extension candidates. Maximal degree in co-relation 11087. Up to 2327 conditions per place. [2024-06-27 21:03:09,297 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 107 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-27 21:03:09,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1144 flow [2024-06-27 21:03:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:03:09,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 21:03:09,300 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 730 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:03:09,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1144 flow [2024-06-27 21:03:09,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1098 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 21:03:09,317 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 758 flow [2024-06-27 21:03:09,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=758, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-27 21:03:09,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-27 21:03:09,320 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 758 flow [2024-06-27 21:03:09,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:09,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:09,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:09,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:03:09,321 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 21:03:09,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:09,321 INFO L85 PathProgramCache]: Analyzing trace with hash 954319513, now seen corresponding path program 1 times [2024-06-27 21:03:09,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:09,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040237083] [2024-06-27 21:03:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:09,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:11,984 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 21:03:11,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040237083] [2024-06-27 21:03:11,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040237083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:11,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:11,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:11,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566723485] [2024-06-27 21:03:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:11,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:11,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:12,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:12,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 758 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:12,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:12,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:12,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:13,763 INFO L124 PetriNetUnfolderBase]: 2093/3110 cut-off events. [2024-06-27 21:03:13,763 INFO L125 PetriNetUnfolderBase]: For 16325/16352 co-relation queries the response was YES. [2024-06-27 21:03:13,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13163 conditions, 3110 events. 2093/3110 cut-off events. For 16325/16352 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14541 event pairs, 479 based on Foata normal form. 39/3146 useless extension candidates. Maximal degree in co-relation 13127. Up to 2321 conditions per place. [2024-06-27 21:03:13,782 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 112 selfloop transitions, 45 changer transitions 0/160 dead transitions. [2024-06-27 21:03:13,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 160 transitions, 1388 flow [2024-06-27 21:03:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:03:13,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 21:03:13,784 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 758 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:03:13,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 160 transitions, 1388 flow [2024-06-27 21:03:13,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 160 transitions, 1340 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:13,805 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 929 flow [2024-06-27 21:03:13,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=929, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-27 21:03:13,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-27 21:03:13,806 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 929 flow [2024-06-27 21:03:13,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:13,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:13,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:13,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:03:13,807 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 21:03:13,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash 208255837, now seen corresponding path program 2 times [2024-06-27 21:03:13,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:13,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718606461] [2024-06-27 21:03:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:13,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:16,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:16,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718606461] [2024-06-27 21:03:16,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718606461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:16,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:16,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509063222] [2024-06-27 21:03:16,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:16,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:16,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:16,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:16,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:16,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 929 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:16,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:16,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:16,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:18,075 INFO L124 PetriNetUnfolderBase]: 2201/3264 cut-off events. [2024-06-27 21:03:18,075 INFO L125 PetriNetUnfolderBase]: For 21344/21355 co-relation queries the response was YES. [2024-06-27 21:03:18,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15088 conditions, 3264 events. 2201/3264 cut-off events. For 21344/21355 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15360 event pairs, 667 based on Foata normal form. 24/3285 useless extension candidates. Maximal degree in co-relation 15049. Up to 2685 conditions per place. [2024-06-27 21:03:18,091 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 112 selfloop transitions, 38 changer transitions 0/153 dead transitions. [2024-06-27 21:03:18,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 153 transitions, 1502 flow [2024-06-27 21:03:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:03:18,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:03:18,093 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 929 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:03:18,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 153 transitions, 1502 flow [2024-06-27 21:03:18,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 153 transitions, 1397 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:18,123 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 1003 flow [2024-06-27 21:03:18,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1003, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2024-06-27 21:03:18,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 21:03:18,123 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 1003 flow [2024-06-27 21:03:18,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:18,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:18,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:03:18,124 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 21:03:18,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -336020153, now seen corresponding path program 3 times [2024-06-27 21:03:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:18,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782720150] [2024-06-27 21:03:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782720150] [2024-06-27 21:03:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782720150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:20,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:20,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412182824] [2024-06-27 21:03:20,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:20,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:20,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:20,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 1003 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:20,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:20,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:20,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:22,550 INFO L124 PetriNetUnfolderBase]: 2237/3316 cut-off events. [2024-06-27 21:03:22,550 INFO L125 PetriNetUnfolderBase]: For 24031/24042 co-relation queries the response was YES. [2024-06-27 21:03:22,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15649 conditions, 3316 events. 2237/3316 cut-off events. For 24031/24042 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15659 event pairs, 633 based on Foata normal form. 24/3337 useless extension candidates. Maximal degree in co-relation 15607. Up to 2713 conditions per place. [2024-06-27 21:03:22,572 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 46 changer transitions 0/166 dead transitions. [2024-06-27 21:03:22,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 166 transitions, 1565 flow [2024-06-27 21:03:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:03:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:03:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-27 21:03:22,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-27 21:03:22,574 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 1003 flow. Second operand 11 states and 184 transitions. [2024-06-27 21:03:22,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 166 transitions, 1565 flow [2024-06-27 21:03:22,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 166 transitions, 1502 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:22,690 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 1093 flow [2024-06-27 21:03:22,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1093, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2024-06-27 21:03:22,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 21:03:22,691 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 1093 flow [2024-06-27 21:03:22,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:22,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:22,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:03:22,692 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 21:03:22,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -485268857, now seen corresponding path program 4 times [2024-06-27 21:03:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:22,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128275676] [2024-06-27 21:03:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128275676] [2024-06-27 21:03:25,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128275676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:25,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:25,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:25,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332308998] [2024-06-27 21:03:25,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:25,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:25,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:25,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:25,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 1093 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:25,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:25,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:25,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:27,093 INFO L124 PetriNetUnfolderBase]: 2433/3588 cut-off events. [2024-06-27 21:03:27,093 INFO L125 PetriNetUnfolderBase]: For 28559/28570 co-relation queries the response was YES. [2024-06-27 21:03:27,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17317 conditions, 3588 events. 2433/3588 cut-off events. For 28559/28570 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17080 event pairs, 623 based on Foata normal form. 24/3609 useless extension candidates. Maximal degree in co-relation 17273. Up to 2549 conditions per place. [2024-06-27 21:03:27,112 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 114 selfloop transitions, 67 changer transitions 0/184 dead transitions. [2024-06-27 21:03:27,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 184 transitions, 1819 flow [2024-06-27 21:03:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:03:27,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-27 21:03:27,122 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 1093 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:03:27,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 184 transitions, 1819 flow [2024-06-27 21:03:27,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 184 transitions, 1705 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 21:03:27,166 INFO L231 Difference]: Finished difference. Result has 100 places, 124 transitions, 1256 flow [2024-06-27 21:03:27,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1256, PETRI_PLACES=100, PETRI_TRANSITIONS=124} [2024-06-27 21:03:27,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 21:03:27,167 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 124 transitions, 1256 flow [2024-06-27 21:03:27,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 21:03:27,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:27,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:27,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:03:27,168 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:27,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1873736004, now seen corresponding path program 1 times [2024-06-27 21:03:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:27,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047338612] [2024-06-27 21:03:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:28,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:28,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047338612] [2024-06-27 21:03:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047338612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:28,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:28,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:03:28,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011864954] [2024-06-27 21:03:28,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:28,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:03:28,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:28,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:03:28,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:03:28,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:28,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 124 transitions, 1256 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:28,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:28,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:28,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:29,474 INFO L124 PetriNetUnfolderBase]: 2427/3578 cut-off events. [2024-06-27 21:03:29,474 INFO L125 PetriNetUnfolderBase]: For 31833/31833 co-relation queries the response was YES. [2024-06-27 21:03:29,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18196 conditions, 3578 events. 2427/3578 cut-off events. For 31833/31833 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17173 event pairs, 897 based on Foata normal form. 2/3578 useless extension candidates. Maximal degree in co-relation 18150. Up to 3558 conditions per place. [2024-06-27 21:03:29,493 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 125 selfloop transitions, 8 changer transitions 0/136 dead transitions. [2024-06-27 21:03:29,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 1555 flow [2024-06-27 21:03:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:03:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:03:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-27 21:03:29,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37073170731707317 [2024-06-27 21:03:29,494 INFO L175 Difference]: Start difference. First operand has 100 places, 124 transitions, 1256 flow. Second operand 5 states and 76 transitions. [2024-06-27 21:03:29,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 1555 flow [2024-06-27 21:03:29,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1432 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:29,548 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1168 flow [2024-06-27 21:03:29,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1168, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-27 21:03:29,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 21:03:29,549 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1168 flow [2024-06-27 21:03:29,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:29,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:29,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:03:29,550 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 21:03:29,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1178554635, now seen corresponding path program 1 times [2024-06-27 21:03:29,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:29,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235154275] [2024-06-27 21:03:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:32,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235154275] [2024-06-27 21:03:32,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235154275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:32,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:32,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:32,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143384353] [2024-06-27 21:03:32,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:32,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:32,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:32,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:32,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1168 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:32,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:32,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:32,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:34,064 INFO L124 PetriNetUnfolderBase]: 2447/3614 cut-off events. [2024-06-27 21:03:34,065 INFO L125 PetriNetUnfolderBase]: For 33727/33757 co-relation queries the response was YES. [2024-06-27 21:03:34,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18153 conditions, 3614 events. 2447/3614 cut-off events. For 33727/33757 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17385 event pairs, 649 based on Foata normal form. 27/3638 useless extension candidates. Maximal degree in co-relation 18104. Up to 3361 conditions per place. [2024-06-27 21:03:34,084 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-27 21:03:34,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 162 transitions, 1698 flow [2024-06-27 21:03:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:03:34,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:03:34,086 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1168 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:03:34,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 162 transitions, 1698 flow [2024-06-27 21:03:34,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 1680 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:34,141 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1287 flow [2024-06-27 21:03:34,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1287, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-27 21:03:34,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 21:03:34,142 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1287 flow [2024-06-27 21:03:34,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:34,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:34,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:34,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:03:34,143 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 21:03:34,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:34,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1944953787, now seen corresponding path program 2 times [2024-06-27 21:03:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415042525] [2024-06-27 21:03:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:34,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415042525] [2024-06-27 21:03:37,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415042525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:37,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:37,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671177862] [2024-06-27 21:03:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:37,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:37,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:37,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:37,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1287 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:37,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:37,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:37,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:38,544 INFO L124 PetriNetUnfolderBase]: 2467/3646 cut-off events. [2024-06-27 21:03:38,544 INFO L125 PetriNetUnfolderBase]: For 38520/38550 co-relation queries the response was YES. [2024-06-27 21:03:38,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18818 conditions, 3646 events. 2467/3646 cut-off events. For 38520/38550 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17563 event pairs, 753 based on Foata normal form. 27/3670 useless extension candidates. Maximal degree in co-relation 18768. Up to 3471 conditions per place. [2024-06-27 21:03:38,562 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 20 changer transitions 0/162 dead transitions. [2024-06-27 21:03:38,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1723 flow [2024-06-27 21:03:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 21:03:38,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-27 21:03:38,564 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1287 flow. Second operand 7 states and 117 transitions. [2024-06-27 21:03:38,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1723 flow [2024-06-27 21:03:38,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 162 transitions, 1643 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:38,610 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1302 flow [2024-06-27 21:03:38,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1302, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-27 21:03:38,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-27 21:03:38,611 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1302 flow [2024-06-27 21:03:38,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:38,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:38,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:38,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:03:38,612 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 21:03:38,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2134006621, now seen corresponding path program 3 times [2024-06-27 21:03:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035720456] [2024-06-27 21:03:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:41,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:41,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035720456] [2024-06-27 21:03:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035720456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:41,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:41,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:41,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247277535] [2024-06-27 21:03:41,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:41,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:41,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:41,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:41,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:41,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1302 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:41,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:41,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:42,872 INFO L124 PetriNetUnfolderBase]: 2459/3632 cut-off events. [2024-06-27 21:03:42,872 INFO L125 PetriNetUnfolderBase]: For 40770/40781 co-relation queries the response was YES. [2024-06-27 21:03:42,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18802 conditions, 3632 events. 2459/3632 cut-off events. For 40770/40781 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17585 event pairs, 893 based on Foata normal form. 12/3641 useless extension candidates. Maximal degree in co-relation 18750. Up to 3525 conditions per place. [2024-06-27 21:03:42,890 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 138 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2024-06-27 21:03:42,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 157 transitions, 1672 flow [2024-06-27 21:03:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:03:42,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-27 21:03:42,894 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1302 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:03:42,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 157 transitions, 1672 flow [2024-06-27 21:03:42,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 157 transitions, 1589 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:42,946 INFO L231 Difference]: Finished difference. Result has 111 places, 131 transitions, 1258 flow [2024-06-27 21:03:42,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=111, PETRI_TRANSITIONS=131} [2024-06-27 21:03:42,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-27 21:03:42,947 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 131 transitions, 1258 flow [2024-06-27 21:03:42,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:42,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:42,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:42,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:03:42,948 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 21:03:42,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1826681409, now seen corresponding path program 1 times [2024-06-27 21:03:42,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:42,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327117204] [2024-06-27 21:03:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:42,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:45,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:45,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327117204] [2024-06-27 21:03:45,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327117204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:45,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:45,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:45,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665232485] [2024-06-27 21:03:45,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:45,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:45,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:45,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:45,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:46,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 131 transitions, 1258 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:46,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:46,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:46,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:47,865 INFO L124 PetriNetUnfolderBase]: 2539/3760 cut-off events. [2024-06-27 21:03:47,866 INFO L125 PetriNetUnfolderBase]: For 46120/46131 co-relation queries the response was YES. [2024-06-27 21:03:47,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19415 conditions, 3760 events. 2539/3760 cut-off events. For 46120/46131 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18262 event pairs, 692 based on Foata normal form. 24/3781 useless extension candidates. Maximal degree in co-relation 19362. Up to 3330 conditions per place. [2024-06-27 21:03:47,888 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 37 changer transitions 0/172 dead transitions. [2024-06-27 21:03:47,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1804 flow [2024-06-27 21:03:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:03:47,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 21:03:47,889 INFO L175 Difference]: Start difference. First operand has 111 places, 131 transitions, 1258 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:03:47,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1804 flow [2024-06-27 21:03:47,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 172 transitions, 1760 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:47,950 INFO L231 Difference]: Finished difference. Result has 114 places, 133 transitions, 1340 flow [2024-06-27 21:03:47,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1340, PETRI_PLACES=114, PETRI_TRANSITIONS=133} [2024-06-27 21:03:47,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 21:03:47,951 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 133 transitions, 1340 flow [2024-06-27 21:03:47,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:47,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:47,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:03:47,952 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 21:03:47,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2136773999, now seen corresponding path program 2 times [2024-06-27 21:03:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:47,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345401772] [2024-06-27 21:03:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:51,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:51,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345401772] [2024-06-27 21:03:51,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345401772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:51,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:51,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766956695] [2024-06-27 21:03:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:51,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:51,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:51,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:51,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:51,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 133 transitions, 1340 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:51,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:51,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:51,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:53,509 INFO L124 PetriNetUnfolderBase]: 2619/3888 cut-off events. [2024-06-27 21:03:53,509 INFO L125 PetriNetUnfolderBase]: For 52380/52391 co-relation queries the response was YES. [2024-06-27 21:03:53,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20637 conditions, 3888 events. 2619/3888 cut-off events. For 52380/52391 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19065 event pairs, 649 based on Foata normal form. 24/3909 useless extension candidates. Maximal degree in co-relation 20583. Up to 3404 conditions per place. [2024-06-27 21:03:53,526 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 133 selfloop transitions, 44 changer transitions 0/180 dead transitions. [2024-06-27 21:03:53,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 1960 flow [2024-06-27 21:03:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:03:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:03:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:03:53,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 21:03:53,527 INFO L175 Difference]: Start difference. First operand has 114 places, 133 transitions, 1340 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:03:53,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 1960 flow [2024-06-27 21:03:53,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 180 transitions, 1866 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:53,570 INFO L231 Difference]: Finished difference. Result has 115 places, 135 transitions, 1386 flow [2024-06-27 21:03:53,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1386, PETRI_PLACES=115, PETRI_TRANSITIONS=135} [2024-06-27 21:03:53,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 21:03:53,571 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 135 transitions, 1386 flow [2024-06-27 21:03:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:53,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:53,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:53,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:03:53,571 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 21:03:53,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2145114239, now seen corresponding path program 3 times [2024-06-27 21:03:53,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:53,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181705939] [2024-06-27 21:03:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:53,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181705939] [2024-06-27 21:03:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181705939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:56,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79886514] [2024-06-27 21:03:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:56,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:03:56,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 135 transitions, 1386 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:56,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:56,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:03:56,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:58,310 INFO L124 PetriNetUnfolderBase]: 2743/4080 cut-off events. [2024-06-27 21:03:58,311 INFO L125 PetriNetUnfolderBase]: For 59357/59368 co-relation queries the response was YES. [2024-06-27 21:03:58,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21904 conditions, 4080 events. 2743/4080 cut-off events. For 59357/59368 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20304 event pairs, 641 based on Foata normal form. 24/4101 useless extension candidates. Maximal degree in co-relation 21849. Up to 3200 conditions per place. [2024-06-27 21:03:58,331 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2024-06-27 21:03:58,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 2108 flow [2024-06-27 21:03:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:03:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:03:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:03:58,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:03:58,332 INFO L175 Difference]: Start difference. First operand has 115 places, 135 transitions, 1386 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:03:58,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 2108 flow [2024-06-27 21:03:58,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 188 transitions, 1990 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:58,383 INFO L231 Difference]: Finished difference. Result has 117 places, 138 transitions, 1435 flow [2024-06-27 21:03:58,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1435, PETRI_PLACES=117, PETRI_TRANSITIONS=138} [2024-06-27 21:03:58,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-27 21:03:58,384 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 138 transitions, 1435 flow [2024-06-27 21:03:58,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:58,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:58,384 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 21:03:58,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:03:58,384 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 21:03:58,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash -80992900, now seen corresponding path program 1 times [2024-06-27 21:03:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:58,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108113445] [2024-06-27 21:03:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:01,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:01,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108113445] [2024-06-27 21:04:01,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108113445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:01,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:01,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838171364] [2024-06-27 21:04:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:01,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:01,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:01,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 138 transitions, 1435 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:01,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:01,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:01,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:03,961 INFO L124 PetriNetUnfolderBase]: 3847/5846 cut-off events. [2024-06-27 21:04:03,961 INFO L125 PetriNetUnfolderBase]: For 110434/110464 co-relation queries the response was YES. [2024-06-27 21:04:03,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31579 conditions, 5846 events. 3847/5846 cut-off events. For 110434/110464 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32103 event pairs, 817 based on Foata normal form. 87/5930 useless extension candidates. Maximal degree in co-relation 31523. Up to 2728 conditions per place. [2024-06-27 21:04:03,989 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 166 selfloop transitions, 55 changer transitions 0/224 dead transitions. [2024-06-27 21:04:03,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 224 transitions, 2439 flow [2024-06-27 21:04:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 21:04:03,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2024-06-27 21:04:03,991 INFO L175 Difference]: Start difference. First operand has 117 places, 138 transitions, 1435 flow. Second operand 10 states and 199 transitions. [2024-06-27 21:04:03,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 224 transitions, 2439 flow [2024-06-27 21:04:04,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 224 transitions, 2346 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:04:04,091 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1554 flow [2024-06-27 21:04:04,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1554, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-06-27 21:04:04,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 21:04:04,092 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1554 flow [2024-06-27 21:04:04,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:04,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:04,092 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 21:04:04,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:04:04,092 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 21:04:04,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash -164019580, now seen corresponding path program 2 times [2024-06-27 21:04:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:04,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495705522] [2024-06-27 21:04:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:07,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:07,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495705522] [2024-06-27 21:04:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495705522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:07,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:07,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517524225] [2024-06-27 21:04:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:07,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:07,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:07,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:07,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1554 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:07,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:07,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:07,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:10,176 INFO L124 PetriNetUnfolderBase]: 4203/6442 cut-off events. [2024-06-27 21:04:10,176 INFO L125 PetriNetUnfolderBase]: For 132587/132617 co-relation queries the response was YES. [2024-06-27 21:04:10,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34798 conditions, 6442 events. 4203/6442 cut-off events. For 132587/132617 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 36531 event pairs, 1213 based on Foata normal form. 103/6542 useless extension candidates. Maximal degree in co-relation 34738. Up to 4906 conditions per place. [2024-06-27 21:04:10,214 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 153 selfloop transitions, 55 changer transitions 0/211 dead transitions. [2024-06-27 21:04:10,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 211 transitions, 2312 flow [2024-06-27 21:04:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-27 21:04:10,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-27 21:04:10,215 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1554 flow. Second operand 11 states and 199 transitions. [2024-06-27 21:04:10,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 211 transitions, 2312 flow [2024-06-27 21:04:10,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 211 transitions, 2192 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:10,362 INFO L231 Difference]: Finished difference. Result has 130 places, 142 transitions, 1590 flow [2024-06-27 21:04:10,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1590, PETRI_PLACES=130, PETRI_TRANSITIONS=142} [2024-06-27 21:04:10,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 21:04:10,363 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 142 transitions, 1590 flow [2024-06-27 21:04:10,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:10,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:10,363 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 21:04:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:04:10,363 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 21:04:10,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -80906410, now seen corresponding path program 3 times [2024-06-27 21:04:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:10,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369204238] [2024-06-27 21:04:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:13,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:13,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369204238] [2024-06-27 21:04:13,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369204238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:13,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:13,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579050622] [2024-06-27 21:04:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:13,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:13,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:13,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:13,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 142 transitions, 1590 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:13,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:13,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:13,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:16,586 INFO L124 PetriNetUnfolderBase]: 4851/7486 cut-off events. [2024-06-27 21:04:16,586 INFO L125 PetriNetUnfolderBase]: For 155063/155093 co-relation queries the response was YES. [2024-06-27 21:04:16,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40259 conditions, 7486 events. 4851/7486 cut-off events. For 155063/155093 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44153 event pairs, 1431 based on Foata normal form. 87/7570 useless extension candidates. Maximal degree in co-relation 40198. Up to 4796 conditions per place. [2024-06-27 21:04:16,625 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 166 selfloop transitions, 55 changer transitions 0/224 dead transitions. [2024-06-27 21:04:16,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 224 transitions, 2492 flow [2024-06-27 21:04:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 21:04:16,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:04:16,627 INFO L175 Difference]: Start difference. First operand has 130 places, 142 transitions, 1590 flow. Second operand 11 states and 209 transitions. [2024-06-27 21:04:16,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 224 transitions, 2492 flow [2024-06-27 21:04:16,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 224 transitions, 2356 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 21:04:16,793 INFO L231 Difference]: Finished difference. Result has 133 places, 144 transitions, 1641 flow [2024-06-27 21:04:16,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1641, PETRI_PLACES=133, PETRI_TRANSITIONS=144} [2024-06-27 21:04:16,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 21:04:16,794 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 144 transitions, 1641 flow [2024-06-27 21:04:16,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:16,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:16,794 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 21:04:16,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:04:16,794 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 21:04:16,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1729690138, now seen corresponding path program 4 times [2024-06-27 21:04:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:16,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835437440] [2024-06-27 21:04:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:20,094 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 21:04:20,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:20,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835437440] [2024-06-27 21:04:20,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835437440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:20,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:20,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:20,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438725615] [2024-06-27 21:04:20,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:20,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:20,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:20,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:20,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 144 transitions, 1641 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:20,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:20,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:22,747 INFO L124 PetriNetUnfolderBase]: 5207/8080 cut-off events. [2024-06-27 21:04:22,747 INFO L125 PetriNetUnfolderBase]: For 176761/176772 co-relation queries the response was YES. [2024-06-27 21:04:22,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42865 conditions, 8080 events. 5207/8080 cut-off events. For 176761/176772 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 48828 event pairs, 2148 based on Foata normal form. 88/8165 useless extension candidates. Maximal degree in co-relation 42802. Up to 6850 conditions per place. [2024-06-27 21:04:22,793 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 155 selfloop transitions, 43 changer transitions 0/201 dead transitions. [2024-06-27 21:04:22,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 201 transitions, 2365 flow [2024-06-27 21:04:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:04:22,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 21:04:22,794 INFO L175 Difference]: Start difference. First operand has 133 places, 144 transitions, 1641 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:04:22,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 201 transitions, 2365 flow [2024-06-27 21:04:22,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 201 transitions, 2226 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:22,995 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 1638 flow [2024-06-27 21:04:22,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1638, PETRI_PLACES=135, PETRI_TRANSITIONS=145} [2024-06-27 21:04:22,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 21:04:22,996 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 1638 flow [2024-06-27 21:04:22,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:22,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:22,996 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 21:04:22,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:04:22,996 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 21:04:22,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -792554504, now seen corresponding path program 1 times [2024-06-27 21:04:22,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:22,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705572293] [2024-06-27 21:04:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:22,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:26,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:26,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705572293] [2024-06-27 21:04:26,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705572293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:26,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:26,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:26,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093695608] [2024-06-27 21:04:26,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:26,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:26,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:26,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:26,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:26,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:26,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 1638 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:26,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:26,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:26,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:29,494 INFO L124 PetriNetUnfolderBase]: 5507/8588 cut-off events. [2024-06-27 21:04:29,494 INFO L125 PetriNetUnfolderBase]: For 190331/190342 co-relation queries the response was YES. [2024-06-27 21:04:29,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44524 conditions, 8588 events. 5507/8588 cut-off events. For 190331/190342 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 52956 event pairs, 2269 based on Foata normal form. 88/8673 useless extension candidates. Maximal degree in co-relation 44460. Up to 7358 conditions per place. [2024-06-27 21:04:29,538 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 48 changer transitions 0/213 dead transitions. [2024-06-27 21:04:29,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 213 transitions, 2418 flow [2024-06-27 21:04:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:04:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:04:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-27 21:04:29,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:04:29,540 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 1638 flow. Second operand 12 states and 205 transitions. [2024-06-27 21:04:29,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 213 transitions, 2418 flow [2024-06-27 21:04:29,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2302 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:29,700 INFO L231 Difference]: Finished difference. Result has 139 places, 146 transitions, 1670 flow [2024-06-27 21:04:29,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1670, PETRI_PLACES=139, PETRI_TRANSITIONS=146} [2024-06-27 21:04:29,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-27 21:04:29,701 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 146 transitions, 1670 flow [2024-06-27 21:04:29,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:29,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:29,701 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 21:04:29,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:04:29,702 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:29,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash -792547064, now seen corresponding path program 2 times [2024-06-27 21:04:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:29,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411154192] [2024-06-27 21:04:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:29,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:33,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:33,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411154192] [2024-06-27 21:04:33,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411154192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:33,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:33,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480605999] [2024-06-27 21:04:33,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:33,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:33,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:33,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:33,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 146 transitions, 1670 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:33,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:33,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:33,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:36,019 INFO L124 PetriNetUnfolderBase]: 5779/9052 cut-off events. [2024-06-27 21:04:36,019 INFO L125 PetriNetUnfolderBase]: For 200041/200052 co-relation queries the response was YES. [2024-06-27 21:04:36,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46399 conditions, 9052 events. 5779/9052 cut-off events. For 200041/200052 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 56770 event pairs, 1992 based on Foata normal form. 72/9121 useless extension candidates. Maximal degree in co-relation 46334. Up to 6506 conditions per place. [2024-06-27 21:04:36,072 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 163 selfloop transitions, 54 changer transitions 0/220 dead transitions. [2024-06-27 21:04:36,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 220 transitions, 2508 flow [2024-06-27 21:04:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:04:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:04:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-27 21:04:36,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:04:36,074 INFO L175 Difference]: Start difference. First operand has 139 places, 146 transitions, 1670 flow. Second operand 12 states and 210 transitions. [2024-06-27 21:04:36,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 220 transitions, 2508 flow [2024-06-27 21:04:36,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2380 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-27 21:04:36,287 INFO L231 Difference]: Finished difference. Result has 141 places, 147 transitions, 1702 flow [2024-06-27 21:04:36,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1702, PETRI_PLACES=141, PETRI_TRANSITIONS=147} [2024-06-27 21:04:36,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 21:04:36,287 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 147 transitions, 1702 flow [2024-06-27 21:04:36,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:36,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:36,288 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 21:04:36,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:04:36,288 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 21:04:36,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -798272516, now seen corresponding path program 5 times [2024-06-27 21:04:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695968012] [2024-06-27 21:04:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:39,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:39,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695968012] [2024-06-27 21:04:39,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695968012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:39,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:39,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675106951] [2024-06-27 21:04:39,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:40,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:40,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:40,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:40,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:40,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 147 transitions, 1702 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:40,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:40,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:40,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:42,708 INFO L124 PetriNetUnfolderBase]: 5955/9356 cut-off events. [2024-06-27 21:04:42,708 INFO L125 PetriNetUnfolderBase]: For 203770/203781 co-relation queries the response was YES. [2024-06-27 21:04:42,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47038 conditions, 9356 events. 5955/9356 cut-off events. For 203770/203781 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 59102 event pairs, 2332 based on Foata normal form. 72/9425 useless extension candidates. Maximal degree in co-relation 46972. Up to 6316 conditions per place. [2024-06-27 21:04:42,761 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 167 selfloop transitions, 42 changer transitions 0/212 dead transitions. [2024-06-27 21:04:42,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 212 transitions, 2582 flow [2024-06-27 21:04:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:04:42,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 21:04:42,762 INFO L175 Difference]: Start difference. First operand has 141 places, 147 transitions, 1702 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:04:42,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 212 transitions, 2582 flow [2024-06-27 21:04:42,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2438 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 21:04:42,984 INFO L231 Difference]: Finished difference. Result has 142 places, 149 transitions, 1732 flow [2024-06-27 21:04:42,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1732, PETRI_PLACES=142, PETRI_TRANSITIONS=149} [2024-06-27 21:04:42,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-27 21:04:42,985 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 149 transitions, 1732 flow [2024-06-27 21:04:42,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:42,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:42,986 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 21:04:42,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:04:42,986 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:42,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2113228987, now seen corresponding path program 1 times [2024-06-27 21:04:42,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:42,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972647895] [2024-06-27 21:04:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:42,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:44,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:44,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972647895] [2024-06-27 21:04:44,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972647895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:44,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:44,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:04:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620471887] [2024-06-27 21:04:44,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:44,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:04:44,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:04:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:04:44,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:44,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 149 transitions, 1732 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:44,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:44,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:44,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:46,265 INFO L124 PetriNetUnfolderBase]: 5949/9348 cut-off events. [2024-06-27 21:04:46,265 INFO L125 PetriNetUnfolderBase]: For 194403/194414 co-relation queries the response was YES. [2024-06-27 21:04:46,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47090 conditions, 9348 events. 5949/9348 cut-off events. For 194403/194414 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59438 event pairs, 3122 based on Foata normal form. 10/9355 useless extension candidates. Maximal degree in co-relation 47022. Up to 9301 conditions per place. [2024-06-27 21:04:46,321 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 13 changer transitions 0/160 dead transitions. [2024-06-27 21:04:46,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 160 transitions, 2072 flow [2024-06-27 21:04:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:04:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:04:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-27 21:04:46,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-27 21:04:46,322 INFO L175 Difference]: Start difference. First operand has 142 places, 149 transitions, 1732 flow. Second operand 5 states and 78 transitions. [2024-06-27 21:04:46,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 160 transitions, 2072 flow [2024-06-27 21:04:46,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 160 transitions, 1942 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:46,634 INFO L231 Difference]: Finished difference. Result has 140 places, 149 transitions, 1638 flow [2024-06-27 21:04:46,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1638, PETRI_PLACES=140, PETRI_TRANSITIONS=149} [2024-06-27 21:04:46,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 21:04:46,635 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 149 transitions, 1638 flow [2024-06-27 21:04:46,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:46,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:46,635 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 21:04:46,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:04:46,635 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 21:04:46,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1808121254, now seen corresponding path program 6 times [2024-06-27 21:04:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:46,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570033863] [2024-06-27 21:04:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:46,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:50,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570033863] [2024-06-27 21:04:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570033863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:50,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:50,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410885097] [2024-06-27 21:04:50,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:50,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:50,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:50,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 149 transitions, 1638 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:50,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:50,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:50,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:53,321 INFO L124 PetriNetUnfolderBase]: 6249/9856 cut-off events. [2024-06-27 21:04:53,321 INFO L125 PetriNetUnfolderBase]: For 232001/232012 co-relation queries the response was YES. [2024-06-27 21:04:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 9856 events. 6249/9856 cut-off events. For 232001/232012 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 63457 event pairs, 2548 based on Foata normal form. 88/9941 useless extension candidates. Maximal degree in co-relation 48286. Up to 8197 conditions per place. [2024-06-27 21:04:53,370 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 153 selfloop transitions, 68 changer transitions 0/224 dead transitions. [2024-06-27 21:04:53,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 224 transitions, 2598 flow [2024-06-27 21:04:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-27 21:04:53,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523281596452328 [2024-06-27 21:04:53,372 INFO L175 Difference]: Start difference. First operand has 140 places, 149 transitions, 1638 flow. Second operand 11 states and 204 transitions. [2024-06-27 21:04:53,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 224 transitions, 2598 flow [2024-06-27 21:04:53,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 224 transitions, 2556 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:53,563 INFO L231 Difference]: Finished difference. Result has 146 places, 150 transitions, 1800 flow [2024-06-27 21:04:53,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1800, PETRI_PLACES=146, PETRI_TRANSITIONS=150} [2024-06-27 21:04:53,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 21:04:53,563 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 150 transitions, 1800 flow [2024-06-27 21:04:53,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:53,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:53,564 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 21:04:53,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:04:53,564 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 21:04:53,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1815486296, now seen corresponding path program 3 times [2024-06-27 21:04:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:53,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720765115] [2024-06-27 21:04:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:53,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:57,232 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 21:04:57,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:57,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720765115] [2024-06-27 21:04:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720765115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:57,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633698647] [2024-06-27 21:04:57,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:57,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:57,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:57,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:04:57,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 150 transitions, 1800 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:04:57,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:57,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:04:57,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:00,236 INFO L124 PetriNetUnfolderBase]: 6521/10320 cut-off events. [2024-06-27 21:05:00,237 INFO L125 PetriNetUnfolderBase]: For 234192/234203 co-relation queries the response was YES. [2024-06-27 21:05:00,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50801 conditions, 10320 events. 6521/10320 cut-off events. For 234192/234203 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 67383 event pairs, 2548 based on Foata normal form. 72/10389 useless extension candidates. Maximal degree in co-relation 50732. Up to 8071 conditions per place. [2024-06-27 21:05:00,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 165 selfloop transitions, 71 changer transitions 0/239 dead transitions. [2024-06-27 21:05:00,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 239 transitions, 2846 flow [2024-06-27 21:05:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:05:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:05:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-27 21:05:00,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 21:05:00,300 INFO L175 Difference]: Start difference. First operand has 146 places, 150 transitions, 1800 flow. Second operand 12 states and 226 transitions. [2024-06-27 21:05:00,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 239 transitions, 2846 flow [2024-06-27 21:05:00,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 239 transitions, 2672 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 21:05:00,597 INFO L231 Difference]: Finished difference. Result has 149 places, 151 transitions, 1826 flow [2024-06-27 21:05:00,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1826, PETRI_PLACES=149, PETRI_TRANSITIONS=151} [2024-06-27 21:05:00,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 21:05:00,598 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 151 transitions, 1826 flow [2024-06-27 21:05:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:05:00,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:00,598 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 21:05:00,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:05:00,599 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 21:05:00,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2074033736, now seen corresponding path program 4 times [2024-06-27 21:05:00,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:00,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003628953] [2024-06-27 21:05:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:00,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:04,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:04,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003628953] [2024-06-27 21:05:04,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003628953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:04,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:04,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:04,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762510232] [2024-06-27 21:05:04,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:04,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:04,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:04,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:04,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:04,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:04,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 151 transitions, 1826 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:05:04,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:04,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:04,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:07,097 INFO L124 PetriNetUnfolderBase]: 7001/11096 cut-off events. [2024-06-27 21:05:07,097 INFO L125 PetriNetUnfolderBase]: For 261922/261933 co-relation queries the response was YES. [2024-06-27 21:05:07,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54158 conditions, 11096 events. 7001/11096 cut-off events. For 261922/261933 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 72993 event pairs, 2425 based on Foata normal form. 72/11165 useless extension candidates. Maximal degree in co-relation 54088. Up to 5651 conditions per place. [2024-06-27 21:05:07,179 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 154 selfloop transitions, 78 changer transitions 0/235 dead transitions. [2024-06-27 21:05:07,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 235 transitions, 2832 flow [2024-06-27 21:05:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:05:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:05:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 21:05:07,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678492239467849 [2024-06-27 21:05:07,181 INFO L175 Difference]: Start difference. First operand has 149 places, 151 transitions, 1826 flow. Second operand 11 states and 211 transitions. [2024-06-27 21:05:07,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 235 transitions, 2832 flow [2024-06-27 21:05:07,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 235 transitions, 2648 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 21:05:07,645 INFO L231 Difference]: Finished difference. Result has 149 places, 150 transitions, 1744 flow [2024-06-27 21:05:07,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1744, PETRI_PLACES=149, PETRI_TRANSITIONS=150} [2024-06-27 21:05:07,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 21:05:07,646 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 150 transitions, 1744 flow [2024-06-27 21:05:07,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 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 21:05:07,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:07,646 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 21:05:07,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:05:07,647 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:07,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1068953029, now seen corresponding path program 2 times [2024-06-27 21:05:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:07,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725516856] [2024-06-27 21:05:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:09,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:09,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725516856] [2024-06-27 21:05:09,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725516856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:09,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:09,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:09,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498335929] [2024-06-27 21:05:09,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:09,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:09,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:09,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:09,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 150 transitions, 1744 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:09,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:09,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:09,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:11,384 INFO L124 PetriNetUnfolderBase]: 6995/11088 cut-off events. [2024-06-27 21:05:11,385 INFO L125 PetriNetUnfolderBase]: For 243527/243538 co-relation queries the response was YES. [2024-06-27 21:05:11,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54332 conditions, 11088 events. 6995/11088 cut-off events. For 243527/243538 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 73663 event pairs, 3888 based on Foata normal form. 10/11095 useless extension candidates. Maximal degree in co-relation 54261. Up to 11033 conditions per place. [2024-06-27 21:05:11,461 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2024-06-27 21:05:11,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 163 transitions, 2094 flow [2024-06-27 21:05:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-27 21:05:11,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-27 21:05:11,463 INFO L175 Difference]: Start difference. First operand has 149 places, 150 transitions, 1744 flow. Second operand 6 states and 88 transitions. [2024-06-27 21:05:11,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 163 transitions, 2094 flow [2024-06-27 21:05:11,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 163 transitions, 1888 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 21:05:11,772 INFO L231 Difference]: Finished difference. Result has 146 places, 150 transitions, 1576 flow [2024-06-27 21:05:11,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1576, PETRI_PLACES=146, PETRI_TRANSITIONS=150} [2024-06-27 21:05:11,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 21:05:11,773 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 150 transitions, 1576 flow [2024-06-27 21:05:11,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:11,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:11,773 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 21:05:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:05:11,773 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:11,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash -157832311, now seen corresponding path program 1 times [2024-06-27 21:05:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:11,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168853472] [2024-06-27 21:05:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168853472] [2024-06-27 21:05:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168853472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:14,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:14,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756506446] [2024-06-27 21:05:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:14,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:14,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 150 transitions, 1576 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:14,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:14,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:14,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:16,332 INFO L124 PetriNetUnfolderBase]: 6689/10612 cut-off events. [2024-06-27 21:05:16,332 INFO L125 PetriNetUnfolderBase]: For 221692/221692 co-relation queries the response was YES. [2024-06-27 21:05:16,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50378 conditions, 10612 events. 6689/10612 cut-off events. For 221692/221692 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 69503 event pairs, 3391 based on Foata normal form. 6/10616 useless extension candidates. Maximal degree in co-relation 50306. Up to 10500 conditions per place. [2024-06-27 21:05:16,388 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 153 selfloop transitions, 18 changer transitions 1/175 dead transitions. [2024-06-27 21:05:16,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2078 flow [2024-06-27 21:05:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 21:05:16,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 21:05:16,390 INFO L175 Difference]: Start difference. First operand has 146 places, 150 transitions, 1576 flow. Second operand 6 states and 98 transitions. [2024-06-27 21:05:16,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2078 flow [2024-06-27 21:05:16,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 175 transitions, 2016 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:16,607 INFO L231 Difference]: Finished difference. Result has 147 places, 153 transitions, 1604 flow [2024-06-27 21:05:16,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1604, PETRI_PLACES=147, PETRI_TRANSITIONS=153} [2024-06-27 21:05:16,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-27 21:05:16,608 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 153 transitions, 1604 flow [2024-06-27 21:05:16,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:16,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:16,609 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 21:05:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:05:16,609 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:16,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1068947077, now seen corresponding path program 2 times [2024-06-27 21:05:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980698690] [2024-06-27 21:05:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:18,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:18,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980698690] [2024-06-27 21:05:18,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980698690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:18,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:18,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:18,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612943060] [2024-06-27 21:05:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:18,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:18,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:18,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:18,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 153 transitions, 1604 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:18,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:18,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:18,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:20,620 INFO L124 PetriNetUnfolderBase]: 6431/10150 cut-off events. [2024-06-27 21:05:20,620 INFO L125 PetriNetUnfolderBase]: For 230267/230267 co-relation queries the response was YES. [2024-06-27 21:05:20,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49102 conditions, 10150 events. 6431/10150 cut-off events. For 230267/230267 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 65624 event pairs, 3167 based on Foata normal form. 2/10149 useless extension candidates. Maximal degree in co-relation 49030. Up to 10049 conditions per place. [2024-06-27 21:05:20,683 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 144 selfloop transitions, 17 changer transitions 5/169 dead transitions. [2024-06-27 21:05:20,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 169 transitions, 1972 flow [2024-06-27 21:05:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-27 21:05:20,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:05:20,685 INFO L175 Difference]: Start difference. First operand has 147 places, 153 transitions, 1604 flow. Second operand 6 states and 93 transitions. [2024-06-27 21:05:20,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 169 transitions, 1972 flow [2024-06-27 21:05:20,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 169 transitions, 1951 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:20,979 INFO L231 Difference]: Finished difference. Result has 150 places, 149 transitions, 1569 flow [2024-06-27 21:05:20,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1569, PETRI_PLACES=150, PETRI_TRANSITIONS=149} [2024-06-27 21:05:20,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-27 21:05:20,979 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 149 transitions, 1569 flow [2024-06-27 21:05:20,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:20,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:20,979 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 21:05:20,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:05:20,979 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:20,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1083238821, now seen corresponding path program 1 times [2024-06-27 21:05:20,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:20,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430521981] [2024-06-27 21:05:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:23,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430521981] [2024-06-27 21:05:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430521981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:23,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:23,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464056729] [2024-06-27 21:05:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:23,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:23,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:23,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 149 transitions, 1569 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:23,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:23,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:23,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:25,065 INFO L124 PetriNetUnfolderBase]: 5722/9029 cut-off events. [2024-06-27 21:05:25,066 INFO L125 PetriNetUnfolderBase]: For 239792/239792 co-relation queries the response was YES. [2024-06-27 21:05:25,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45723 conditions, 9029 events. 5722/9029 cut-off events. For 239792/239792 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57142 event pairs, 2996 based on Foata normal form. 2/9029 useless extension candidates. Maximal degree in co-relation 45650. Up to 9003 conditions per place. [2024-06-27 21:05:25,129 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 151 selfloop transitions, 10 changer transitions 0/164 dead transitions. [2024-06-27 21:05:25,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 164 transitions, 1941 flow [2024-06-27 21:05:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-06-27 21:05:25,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34552845528455284 [2024-06-27 21:05:25,131 INFO L175 Difference]: Start difference. First operand has 150 places, 149 transitions, 1569 flow. Second operand 6 states and 85 transitions. [2024-06-27 21:05:25,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 164 transitions, 1941 flow [2024-06-27 21:05:25,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 164 transitions, 1910 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:25,399 INFO L231 Difference]: Finished difference. Result has 153 places, 151 transitions, 1587 flow [2024-06-27 21:05:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1587, PETRI_PLACES=153, PETRI_TRANSITIONS=151} [2024-06-27 21:05:25,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 21:05:25,400 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 151 transitions, 1587 flow [2024-06-27 21:05:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:25,400 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 21:05:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:05:25,400 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:25,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1958001136, now seen corresponding path program 1 times [2024-06-27 21:05:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21755118] [2024-06-27 21:05:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:27,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21755118] [2024-06-27 21:05:27,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21755118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:27,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:27,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:27,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608018825] [2024-06-27 21:05:27,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:27,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:27,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:27,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:27,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 151 transitions, 1587 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:27,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:27,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:27,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:29,339 INFO L124 PetriNetUnfolderBase]: 5742/9059 cut-off events. [2024-06-27 21:05:29,340 INFO L125 PetriNetUnfolderBase]: For 254337/254345 co-relation queries the response was YES. [2024-06-27 21:05:29,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46279 conditions, 9059 events. 5742/9059 cut-off events. For 254337/254345 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57416 event pairs, 2799 based on Foata normal form. 10/9066 useless extension candidates. Maximal degree in co-relation 46204. Up to 8934 conditions per place. [2024-06-27 21:05:29,402 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 157 selfloop transitions, 22 changer transitions 0/182 dead transitions. [2024-06-27 21:05:29,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 182 transitions, 2111 flow [2024-06-27 21:05:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:05:29,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-27 21:05:29,404 INFO L175 Difference]: Start difference. First operand has 153 places, 151 transitions, 1587 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:05:29,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 182 transitions, 2111 flow [2024-06-27 21:05:29,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 182 transitions, 2078 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:29,708 INFO L231 Difference]: Finished difference. Result has 157 places, 154 transitions, 1638 flow [2024-06-27 21:05:29,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1638, PETRI_PLACES=157, PETRI_TRANSITIONS=154} [2024-06-27 21:05:29,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 21:05:29,709 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 154 transitions, 1638 flow [2024-06-27 21:05:29,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:29,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:29,710 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 21:05:29,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:05:29,710 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:29,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1085590774, now seen corresponding path program 2 times [2024-06-27 21:05:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953164123] [2024-06-27 21:05:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953164123] [2024-06-27 21:05:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953164123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:31,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:31,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:31,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525473450] [2024-06-27 21:05:31,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:31,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:31,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:31,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:31,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:31,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 154 transitions, 1638 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:31,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:31,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:31,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:33,418 INFO L124 PetriNetUnfolderBase]: 5730/9046 cut-off events. [2024-06-27 21:05:33,418 INFO L125 PetriNetUnfolderBase]: For 265651/265653 co-relation queries the response was YES. [2024-06-27 21:05:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46519 conditions, 9046 events. 5730/9046 cut-off events. For 265651/265653 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57302 event pairs, 2815 based on Foata normal form. 6/9047 useless extension candidates. Maximal degree in co-relation 46443. Up to 8926 conditions per place. [2024-06-27 21:05:33,479 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 146 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2024-06-27 21:05:33,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 170 transitions, 2008 flow [2024-06-27 21:05:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-27 21:05:33,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:05:33,481 INFO L175 Difference]: Start difference. First operand has 157 places, 154 transitions, 1638 flow. Second operand 6 states and 93 transitions. [2024-06-27 21:05:33,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 170 transitions, 2008 flow [2024-06-27 21:05:33,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 170 transitions, 1917 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:33,770 INFO L231 Difference]: Finished difference. Result has 157 places, 154 transitions, 1595 flow [2024-06-27 21:05:33,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1595, PETRI_PLACES=157, PETRI_TRANSITIONS=154} [2024-06-27 21:05:33,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 21:05:33,770 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 154 transitions, 1595 flow [2024-06-27 21:05:33,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:33,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:33,771 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 21:05:33,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:05:33,771 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 21:05:33,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash 778906006, now seen corresponding path program 3 times [2024-06-27 21:05:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:33,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568336794] [2024-06-27 21:05:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:33,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:35,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:35,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568336794] [2024-06-27 21:05:35,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568336794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:35,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:35,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:35,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721369979] [2024-06-27 21:05:35,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:35,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:35,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:35,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:35,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:35,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 154 transitions, 1595 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:35,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:35,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:35,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:37,861 INFO L124 PetriNetUnfolderBase]: 5718/9030 cut-off events. [2024-06-27 21:05:37,861 INFO L125 PetriNetUnfolderBase]: For 277061/277063 co-relation queries the response was YES. [2024-06-27 21:05:37,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46348 conditions, 9030 events. 5718/9030 cut-off events. For 277061/277063 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 57217 event pairs, 2807 based on Foata normal form. 6/9031 useless extension candidates. Maximal degree in co-relation 46272. Up to 8886 conditions per place. [2024-06-27 21:05:37,911 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 146 selfloop transitions, 26 changer transitions 0/175 dead transitions. [2024-06-27 21:05:37,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 175 transitions, 2015 flow [2024-06-27 21:05:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-27 21:05:37,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-27 21:05:37,912 INFO L175 Difference]: Start difference. First operand has 157 places, 154 transitions, 1595 flow. Second operand 7 states and 104 transitions. [2024-06-27 21:05:37,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 175 transitions, 2015 flow [2024-06-27 21:05:38,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 175 transitions, 1973 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:38,187 INFO L231 Difference]: Finished difference. Result has 159 places, 157 transitions, 1653 flow [2024-06-27 21:05:38,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1653, PETRI_PLACES=159, PETRI_TRANSITIONS=157} [2024-06-27 21:05:38,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-27 21:05:38,187 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 157 transitions, 1653 flow [2024-06-27 21:05:38,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:38,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:38,188 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 21:05:38,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:05:38,188 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 21:05:38,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash -712132678, now seen corresponding path program 1 times [2024-06-27 21:05:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:38,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097196614] [2024-06-27 21:05:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:38,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:40,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:40,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097196614] [2024-06-27 21:05:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097196614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525351863] [2024-06-27 21:05:40,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:40,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:40,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:40,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:40,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 157 transitions, 1653 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:40,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:40,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:40,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:42,827 INFO L124 PetriNetUnfolderBase]: 5716/9025 cut-off events. [2024-06-27 21:05:42,827 INFO L125 PetriNetUnfolderBase]: For 290407/290415 co-relation queries the response was YES. [2024-06-27 21:05:42,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47544 conditions, 9025 events. 5716/9025 cut-off events. For 290407/290415 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 56931 event pairs, 2689 based on Foata normal form. 12/9034 useless extension candidates. Maximal degree in co-relation 47467. Up to 8817 conditions per place. [2024-06-27 21:05:42,897 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 148 selfloop transitions, 35 changer transitions 1/187 dead transitions. [2024-06-27 21:05:42,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 187 transitions, 2202 flow [2024-06-27 21:05:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:05:42,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:05:42,898 INFO L175 Difference]: Start difference. First operand has 159 places, 157 transitions, 1653 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:05:42,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 187 transitions, 2202 flow [2024-06-27 21:05:43,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 187 transitions, 2124 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:43,234 INFO L231 Difference]: Finished difference. Result has 162 places, 159 transitions, 1691 flow [2024-06-27 21:05:43,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1691, PETRI_PLACES=162, PETRI_TRANSITIONS=159} [2024-06-27 21:05:43,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 21:05:43,235 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 159 transitions, 1691 flow [2024-06-27 21:05:43,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:43,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:43,235 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 21:05:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:05:43,236 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 21:05:43,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash -711982948, now seen corresponding path program 2 times [2024-06-27 21:05:43,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248107686] [2024-06-27 21:05:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:43,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:45,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:45,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248107686] [2024-06-27 21:05:45,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248107686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:45,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:45,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:45,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761315764] [2024-06-27 21:05:45,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:45,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:45,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:45,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:45,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 159 transitions, 1691 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:45,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:45,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:45,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:47,290 INFO L124 PetriNetUnfolderBase]: 5550/8731 cut-off events. [2024-06-27 21:05:47,290 INFO L125 PetriNetUnfolderBase]: For 300180/300199 co-relation queries the response was YES. [2024-06-27 21:05:47,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46707 conditions, 8731 events. 5550/8731 cut-off events. For 300180/300199 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 54478 event pairs, 2538 based on Foata normal form. 18/8746 useless extension candidates. Maximal degree in co-relation 46629. Up to 8534 conditions per place. [2024-06-27 21:05:47,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 141 selfloop transitions, 32 changer transitions 4/180 dead transitions. [2024-06-27 21:05:47,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 180 transitions, 2093 flow [2024-06-27 21:05:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:05:47,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-27 21:05:47,358 INFO L175 Difference]: Start difference. First operand has 162 places, 159 transitions, 1691 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:05:47,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 180 transitions, 2093 flow [2024-06-27 21:05:47,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 180 transitions, 2031 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:47,682 INFO L231 Difference]: Finished difference. Result has 163 places, 156 transitions, 1657 flow [2024-06-27 21:05:47,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1657, PETRI_PLACES=163, PETRI_TRANSITIONS=156} [2024-06-27 21:05:47,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 21:05:47,682 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 156 transitions, 1657 flow [2024-06-27 21:05:47,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:47,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:47,683 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 21:05:47,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:05:47,683 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 21:05:47,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash -290826372, now seen corresponding path program 1 times [2024-06-27 21:05:47,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:47,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467974590] [2024-06-27 21:05:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:50,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467974590] [2024-06-27 21:05:50,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467974590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:50,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:50,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658615090] [2024-06-27 21:05:50,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:50,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:50,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 156 transitions, 1657 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:05:50,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:50,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:50,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:52,140 INFO L124 PetriNetUnfolderBase]: 5114/8041 cut-off events. [2024-06-27 21:05:52,140 INFO L125 PetriNetUnfolderBase]: For 298467/298475 co-relation queries the response was YES. [2024-06-27 21:05:52,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44275 conditions, 8041 events. 5114/8041 cut-off events. For 298467/298475 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49451 event pairs, 2573 based on Foata normal form. 8/8046 useless extension candidates. Maximal degree in co-relation 44197. Up to 7982 conditions per place. [2024-06-27 21:05:52,188 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 151 selfloop transitions, 17 changer transitions 0/171 dead transitions. [2024-06-27 21:05:52,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 171 transitions, 2055 flow [2024-06-27 21:05:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:05:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:05:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-27 21:05:52,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-27 21:05:52,190 INFO L175 Difference]: Start difference. First operand has 163 places, 156 transitions, 1657 flow. Second operand 6 states and 88 transitions. [2024-06-27 21:05:52,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 171 transitions, 2055 flow [2024-06-27 21:05:52,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 171 transitions, 1960 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:05:52,441 INFO L231 Difference]: Finished difference. Result has 161 places, 158 transitions, 1640 flow [2024-06-27 21:05:52,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1640, PETRI_PLACES=161, PETRI_TRANSITIONS=158} [2024-06-27 21:05:52,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-27 21:05:52,442 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 158 transitions, 1640 flow [2024-06-27 21:05:52,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:05:52,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:52,442 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 21:05:52,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:05:52,442 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 21:05:52,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1352945720, now seen corresponding path program 3 times [2024-06-27 21:05:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:52,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941938730] [2024-06-27 21:05:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:52,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:55,062 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 21:05:55,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:55,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941938730] [2024-06-27 21:05:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941938730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:55,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83448650] [2024-06-27 21:05:55,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:55,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:55,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 158 transitions, 1640 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:55,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:55,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:55,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:57,065 INFO L124 PetriNetUnfolderBase]: 5144/8083 cut-off events. [2024-06-27 21:05:57,065 INFO L125 PetriNetUnfolderBase]: For 300905/300913 co-relation queries the response was YES. [2024-06-27 21:05:57,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44489 conditions, 8083 events. 5144/8083 cut-off events. For 300905/300913 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49566 event pairs, 2342 based on Foata normal form. 12/8092 useless extension candidates. Maximal degree in co-relation 44411. Up to 7771 conditions per place. [2024-06-27 21:05:57,122 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 141 selfloop transitions, 45 changer transitions 0/189 dead transitions. [2024-06-27 21:05:57,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 189 transitions, 2294 flow [2024-06-27 21:05:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:05:57,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-27 21:05:57,123 INFO L175 Difference]: Start difference. First operand has 161 places, 158 transitions, 1640 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:05:57,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 189 transitions, 2294 flow [2024-06-27 21:05:57,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 189 transitions, 2240 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:57,515 INFO L231 Difference]: Finished difference. Result has 164 places, 164 transitions, 1759 flow [2024-06-27 21:05:57,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1759, PETRI_PLACES=164, PETRI_TRANSITIONS=164} [2024-06-27 21:05:57,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 21:05:57,515 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 164 transitions, 1759 flow [2024-06-27 21:05:57,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:57,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:57,516 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 21:05:57,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:05:57,516 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 21:05:57,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:57,516 INFO L85 PathProgramCache]: Analyzing trace with hash -766621382, now seen corresponding path program 4 times [2024-06-27 21:05:57,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:57,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112267567] [2024-06-27 21:05:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:57,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:59,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112267567] [2024-06-27 21:05:59,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112267567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:59,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:59,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:05:59,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569903708] [2024-06-27 21:05:59,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:59,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:05:59,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:05:59,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:05:59,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:05:59,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 164 transitions, 1759 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:59,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:59,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:05:59,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:01,649 INFO L124 PetriNetUnfolderBase]: 5154/8100 cut-off events. [2024-06-27 21:06:01,649 INFO L125 PetriNetUnfolderBase]: For 313624/313639 co-relation queries the response was YES. [2024-06-27 21:06:01,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45144 conditions, 8100 events. 5154/8100 cut-off events. For 313624/313639 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49659 event pairs, 2394 based on Foata normal form. 11/8107 useless extension candidates. Maximal degree in co-relation 45065. Up to 7777 conditions per place. [2024-06-27 21:06:01,711 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 49 changer transitions 0/189 dead transitions. [2024-06-27 21:06:01,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 189 transitions, 2457 flow [2024-06-27 21:06:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:06:01,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:06:01,713 INFO L175 Difference]: Start difference. First operand has 164 places, 164 transitions, 1759 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:06:01,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 189 transitions, 2457 flow [2024-06-27 21:06:02,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 189 transitions, 2387 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:02,099 INFO L231 Difference]: Finished difference. Result has 168 places, 167 transitions, 1837 flow [2024-06-27 21:06:02,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1837, PETRI_PLACES=168, PETRI_TRANSITIONS=167} [2024-06-27 21:06:02,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-27 21:06:02,100 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 167 transitions, 1837 flow [2024-06-27 21:06:02,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:02,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:02,100 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 21:06:02,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:06:02,101 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 21:06:02,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:02,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1617998054, now seen corresponding path program 5 times [2024-06-27 21:06:02,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:02,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374783714] [2024-06-27 21:06:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:02,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:04,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:04,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374783714] [2024-06-27 21:06:04,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374783714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:04,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:04,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:04,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755443263] [2024-06-27 21:06:04,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:04,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:04,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:04,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:04,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:04,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:04,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 167 transitions, 1837 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:04,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:04,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:04,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:06,545 INFO L124 PetriNetUnfolderBase]: 5148/8092 cut-off events. [2024-06-27 21:06:06,545 INFO L125 PetriNetUnfolderBase]: For 327747/327762 co-relation queries the response was YES. [2024-06-27 21:06:06,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45386 conditions, 8092 events. 5148/8092 cut-off events. For 327747/327762 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49611 event pairs, 2398 based on Foata normal form. 11/8099 useless extension candidates. Maximal degree in co-relation 45306. Up to 7774 conditions per place. [2024-06-27 21:06:06,595 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 49 changer transitions 0/187 dead transitions. [2024-06-27 21:06:06,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 187 transitions, 2409 flow [2024-06-27 21:06:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:06:06,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-27 21:06:06,597 INFO L175 Difference]: Start difference. First operand has 168 places, 167 transitions, 1837 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:06:06,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 187 transitions, 2409 flow [2024-06-27 21:06:06,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 187 transitions, 2274 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:06,971 INFO L231 Difference]: Finished difference. Result has 170 places, 167 transitions, 1806 flow [2024-06-27 21:06:06,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1806, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2024-06-27 21:06:06,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-27 21:06:06,972 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 1806 flow [2024-06-27 21:06:06,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:06,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:06,972 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 21:06:06,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:06:06,973 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 21:06:06,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1623329248, now seen corresponding path program 2 times [2024-06-27 21:06:06,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:06,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631685539] [2024-06-27 21:06:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:09,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:09,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631685539] [2024-06-27 21:06:09,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631685539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:09,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:09,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:09,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534774738] [2024-06-27 21:06:09,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:09,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:09,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:09,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:09,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 167 transitions, 1806 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:09,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:09,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:09,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:11,716 INFO L124 PetriNetUnfolderBase]: 5156/8101 cut-off events. [2024-06-27 21:06:11,716 INFO L125 PetriNetUnfolderBase]: For 342884/342892 co-relation queries the response was YES. [2024-06-27 21:06:11,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45751 conditions, 8101 events. 5156/8101 cut-off events. For 342884/342892 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49760 event pairs, 2590 based on Foata normal form. 8/8106 useless extension candidates. Maximal degree in co-relation 45671. Up to 8040 conditions per place. [2024-06-27 21:06:11,775 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 163 selfloop transitions, 18 changer transitions 0/184 dead transitions. [2024-06-27 21:06:11,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 184 transitions, 2238 flow [2024-06-27 21:06:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-27 21:06:11,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-27 21:06:11,776 INFO L175 Difference]: Start difference. First operand has 170 places, 167 transitions, 1806 flow. Second operand 7 states and 98 transitions. [2024-06-27 21:06:11,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 184 transitions, 2238 flow [2024-06-27 21:06:12,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 184 transitions, 2070 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:12,108 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 1719 flow [2024-06-27 21:06:12,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2024-06-27 21:06:12,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 21:06:12,109 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 1719 flow [2024-06-27 21:06:12,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:12,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:12,110 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 21:06:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:06:12,110 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 21:06:12,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1610371558, now seen corresponding path program 3 times [2024-06-27 21:06:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:12,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597093961] [2024-06-27 21:06:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:14,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:14,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597093961] [2024-06-27 21:06:14,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597093961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:14,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:14,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:14,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677568319] [2024-06-27 21:06:14,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:14,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:14,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:14,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:14,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:14,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:14,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 1719 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:14,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:14,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:14,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:16,611 INFO L124 PetriNetUnfolderBase]: 5151/8094 cut-off events. [2024-06-27 21:06:16,612 INFO L125 PetriNetUnfolderBase]: For 355803/355811 co-relation queries the response was YES. [2024-06-27 21:06:16,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45832 conditions, 8094 events. 5151/8094 cut-off events. For 355803/355811 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49766 event pairs, 2577 based on Foata normal form. 8/8099 useless extension candidates. Maximal degree in co-relation 45751. Up to 8013 conditions per place. [2024-06-27 21:06:16,671 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 160 selfloop transitions, 23 changer transitions 0/186 dead transitions. [2024-06-27 21:06:16,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 186 transitions, 2159 flow [2024-06-27 21:06:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-27 21:06:16,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-27 21:06:16,672 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 1719 flow. Second operand 7 states and 98 transitions. [2024-06-27 21:06:16,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 186 transitions, 2159 flow [2024-06-27 21:06:17,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 186 transitions, 2094 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:17,065 INFO L231 Difference]: Finished difference. Result has 171 places, 171 transitions, 1749 flow [2024-06-27 21:06:17,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1749, PETRI_PLACES=171, PETRI_TRANSITIONS=171} [2024-06-27 21:06:17,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-27 21:06:17,066 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 171 transitions, 1749 flow [2024-06-27 21:06:17,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:17,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:17,066 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 21:06:17,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:06:17,066 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 21:06:17,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1352931832, now seen corresponding path program 1 times [2024-06-27 21:06:17,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:17,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781780918] [2024-06-27 21:06:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:17,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:20,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:20,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781780918] [2024-06-27 21:06:20,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781780918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:20,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:20,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826671736] [2024-06-27 21:06:20,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:20,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:20,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:20,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:20,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 171 transitions, 1749 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:22,323 INFO L124 PetriNetUnfolderBase]: 5203/8172 cut-off events. [2024-06-27 21:06:22,324 INFO L125 PetriNetUnfolderBase]: For 383548/383548 co-relation queries the response was YES. [2024-06-27 21:06:22,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46571 conditions, 8172 events. 5203/8172 cut-off events. For 383548/383548 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 50064 event pairs, 2516 based on Foata normal form. 14/8184 useless extension candidates. Maximal degree in co-relation 46489. Up to 8031 conditions per place. [2024-06-27 21:06:22,387 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 19 changer transitions 0/200 dead transitions. [2024-06-27 21:06:22,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 200 transitions, 2251 flow [2024-06-27 21:06:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:06:22,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-27 21:06:22,389 INFO L175 Difference]: Start difference. First operand has 171 places, 171 transitions, 1749 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:06:22,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 200 transitions, 2251 flow [2024-06-27 21:06:22,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 200 transitions, 2172 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:22,722 INFO L231 Difference]: Finished difference. Result has 173 places, 173 transitions, 1748 flow [2024-06-27 21:06:22,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1748, PETRI_PLACES=173, PETRI_TRANSITIONS=173} [2024-06-27 21:06:22,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-27 21:06:22,722 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 173 transitions, 1748 flow [2024-06-27 21:06:22,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:22,723 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 21:06:22,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:06:22,723 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 21:06:22,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash -767333350, now seen corresponding path program 2 times [2024-06-27 21:06:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452262761] [2024-06-27 21:06:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:25,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452262761] [2024-06-27 21:06:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452262761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:25,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:25,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381285313] [2024-06-27 21:06:25,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:25,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:25,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:25,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:25,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 173 transitions, 1748 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:25,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:25,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:25,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:27,599 INFO L124 PetriNetUnfolderBase]: 5211/8186 cut-off events. [2024-06-27 21:06:27,599 INFO L125 PetriNetUnfolderBase]: For 389496/389496 co-relation queries the response was YES. [2024-06-27 21:06:27,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47132 conditions, 8186 events. 5211/8186 cut-off events. For 389496/389496 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 50237 event pairs, 2497 based on Foata normal form. 2/8185 useless extension candidates. Maximal degree in co-relation 47049. Up to 8095 conditions per place. [2024-06-27 21:06:27,644 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 19 changer transitions 0/192 dead transitions. [2024-06-27 21:06:27,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 192 transitions, 2198 flow [2024-06-27 21:06:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-06-27 21:06:27,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34843205574912894 [2024-06-27 21:06:27,645 INFO L175 Difference]: Start difference. First operand has 173 places, 173 transitions, 1748 flow. Second operand 7 states and 100 transitions. [2024-06-27 21:06:27,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 192 transitions, 2198 flow [2024-06-27 21:06:28,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 192 transitions, 2140 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:28,036 INFO L231 Difference]: Finished difference. Result has 175 places, 175 transitions, 1771 flow [2024-06-27 21:06:28,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1690, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1771, PETRI_PLACES=175, PETRI_TRANSITIONS=175} [2024-06-27 21:06:28,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 21:06:28,037 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 175 transitions, 1771 flow [2024-06-27 21:06:28,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:28,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:28,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:28,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:06:28,037 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 21:06:28,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1610365606, now seen corresponding path program 3 times [2024-06-27 21:06:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:28,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559780392] [2024-06-27 21:06:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:30,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:30,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559780392] [2024-06-27 21:06:30,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559780392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:30,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:30,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453133856] [2024-06-27 21:06:30,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:30,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:30,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:30,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:30,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 175 transitions, 1771 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:30,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:30,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:30,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:32,832 INFO L124 PetriNetUnfolderBase]: 5206/8179 cut-off events. [2024-06-27 21:06:32,832 INFO L125 PetriNetUnfolderBase]: For 404546/404546 co-relation queries the response was YES. [2024-06-27 21:06:32,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47367 conditions, 8179 events. 5206/8179 cut-off events. For 404546/404546 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 50138 event pairs, 2488 based on Foata normal form. 2/8178 useless extension candidates. Maximal degree in co-relation 47283. Up to 8016 conditions per place. [2024-06-27 21:06:32,893 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 24 changer transitions 0/199 dead transitions. [2024-06-27 21:06:32,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 199 transitions, 2267 flow [2024-06-27 21:06:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-27 21:06:32,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-27 21:06:32,895 INFO L175 Difference]: Start difference. First operand has 175 places, 175 transitions, 1771 flow. Second operand 7 states and 106 transitions. [2024-06-27 21:06:32,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 199 transitions, 2267 flow [2024-06-27 21:06:33,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 199 transitions, 2202 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:33,362 INFO L231 Difference]: Finished difference. Result has 177 places, 177 transitions, 1801 flow [2024-06-27 21:06:33,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=177, PETRI_TRANSITIONS=177} [2024-06-27 21:06:33,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 21:06:33,363 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 177 transitions, 1801 flow [2024-06-27 21:06:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:33,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:33,363 INFO 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 21:06:33,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:06:33,364 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 21:06:33,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1487230391, now seen corresponding path program 1 times [2024-06-27 21:06:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:33,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575769241] [2024-06-27 21:06:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:33,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:36,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:36,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575769241] [2024-06-27 21:06:36,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575769241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:36,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:36,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:36,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286839635] [2024-06-27 21:06:36,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:36,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:36,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:36,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:36,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 177 transitions, 1801 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:06:36,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:36,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:36,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:38,756 INFO L124 PetriNetUnfolderBase]: 5234/8223 cut-off events. [2024-06-27 21:06:38,756 INFO L125 PetriNetUnfolderBase]: For 428440/428448 co-relation queries the response was YES. [2024-06-27 21:06:38,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48014 conditions, 8223 events. 5234/8223 cut-off events. For 428440/428448 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50356 event pairs, 2246 based on Foata normal form. 14/8234 useless extension candidates. Maximal degree in co-relation 47929. Up to 7948 conditions per place. [2024-06-27 21:06:38,810 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 26 changer transitions 0/219 dead transitions. [2024-06-27 21:06:38,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 219 transitions, 2459 flow [2024-06-27 21:06:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:06:38,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-27 21:06:38,811 INFO L175 Difference]: Start difference. First operand has 177 places, 177 transitions, 1801 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:06:38,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 219 transitions, 2459 flow [2024-06-27 21:06:39,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 219 transitions, 2380 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:39,131 INFO L231 Difference]: Finished difference. Result has 181 places, 178 transitions, 1790 flow [2024-06-27 21:06:39,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1790, PETRI_PLACES=181, PETRI_TRANSITIONS=178} [2024-06-27 21:06:39,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-27 21:06:39,131 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 178 transitions, 1790 flow [2024-06-27 21:06:39,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:06:39,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:39,132 INFO 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 21:06:39,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:06:39,132 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 21:06:39,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash -711441977, now seen corresponding path program 2 times [2024-06-27 21:06:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:39,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556025471] [2024-06-27 21:06:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:39,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:41,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556025471] [2024-06-27 21:06:41,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556025471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:41,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:41,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:41,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670910289] [2024-06-27 21:06:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:41,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:41,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:41,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:41,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 178 transitions, 1790 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:06:41,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:41,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:41,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:44,573 INFO L124 PetriNetUnfolderBase]: 5278/8291 cut-off events. [2024-06-27 21:06:44,573 INFO L125 PetriNetUnfolderBase]: For 450509/450517 co-relation queries the response was YES. [2024-06-27 21:06:44,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48701 conditions, 8291 events. 5278/8291 cut-off events. For 450509/450517 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 50922 event pairs, 2402 based on Foata normal form. 18/8306 useless extension candidates. Maximal degree in co-relation 48615. Up to 8122 conditions per place. [2024-06-27 21:06:44,638 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 23 changer transitions 0/213 dead transitions. [2024-06-27 21:06:44,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 213 transitions, 2320 flow [2024-06-27 21:06:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 21:06:44,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-27 21:06:44,640 INFO L175 Difference]: Start difference. First operand has 181 places, 178 transitions, 1790 flow. Second operand 9 states and 134 transitions. [2024-06-27 21:06:44,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 213 transitions, 2320 flow [2024-06-27 21:06:45,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 213 transitions, 2246 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:45,080 INFO L231 Difference]: Finished difference. Result has 183 places, 179 transitions, 1783 flow [2024-06-27 21:06:45,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1783, PETRI_PLACES=183, PETRI_TRANSITIONS=179} [2024-06-27 21:06:45,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 21:06:45,081 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 179 transitions, 1783 flow [2024-06-27 21:06:45,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:06:45,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:45,081 INFO 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 21:06:45,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:06:45,081 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 21:06:45,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash -606042101, now seen corresponding path program 1 times [2024-06-27 21:06:45,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:45,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017167278] [2024-06-27 21:06:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:45,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:47,419 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 21:06:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:47,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017167278] [2024-06-27 21:06:47,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017167278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:47,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:47,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011368492] [2024-06-27 21:06:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:47,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:47,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 179 transitions, 1783 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:47,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:47,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:47,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:50,335 INFO L124 PetriNetUnfolderBase]: 5274/8289 cut-off events. [2024-06-27 21:06:50,335 INFO L125 PetriNetUnfolderBase]: For 458833/458852 co-relation queries the response was YES. [2024-06-27 21:06:50,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48394 conditions, 8289 events. 5274/8289 cut-off events. For 458833/458852 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50685 event pairs, 1957 based on Foata normal form. 28/8314 useless extension candidates. Maximal degree in co-relation 48307. Up to 7500 conditions per place. [2024-06-27 21:06:50,389 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 60 changer transitions 1/236 dead transitions. [2024-06-27 21:06:50,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 236 transitions, 2591 flow [2024-06-27 21:06:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:06:50,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:06:50,391 INFO L175 Difference]: Start difference. First operand has 183 places, 179 transitions, 1783 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:06:50,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 236 transitions, 2591 flow [2024-06-27 21:06:50,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 236 transitions, 2544 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:50,709 INFO L231 Difference]: Finished difference. Result has 186 places, 181 transitions, 1883 flow [2024-06-27 21:06:50,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1883, PETRI_PLACES=186, PETRI_TRANSITIONS=181} [2024-06-27 21:06:50,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 21:06:50,710 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 181 transitions, 1883 flow [2024-06-27 21:06:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:50,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:50,710 INFO 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 21:06:50,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:06:50,710 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 21:06:50,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:50,710 INFO L85 PathProgramCache]: Analyzing trace with hash -711150701, now seen corresponding path program 2 times [2024-06-27 21:06:50,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:50,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64827963] [2024-06-27 21:06:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:50,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64827963] [2024-06-27 21:06:52,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64827963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:52,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:52,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:52,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595752163] [2024-06-27 21:06:52,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:52,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:52,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:52,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 181 transitions, 1883 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:52,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:52,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:52,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:55,542 INFO L124 PetriNetUnfolderBase]: 5382/8441 cut-off events. [2024-06-27 21:06:55,542 INFO L125 PetriNetUnfolderBase]: For 484399/484418 co-relation queries the response was YES. [2024-06-27 21:06:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50503 conditions, 8441 events. 5382/8441 cut-off events. For 484399/484418 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51597 event pairs, 1952 based on Foata normal form. 20/8458 useless extension candidates. Maximal degree in co-relation 50415. Up to 7556 conditions per place. [2024-06-27 21:06:55,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 161 selfloop transitions, 66 changer transitions 1/231 dead transitions. [2024-06-27 21:06:55,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 231 transitions, 2727 flow [2024-06-27 21:06:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:06:55,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 21:06:55,610 INFO L175 Difference]: Start difference. First operand has 186 places, 181 transitions, 1883 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:06:55,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 231 transitions, 2727 flow [2024-06-27 21:06:56,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 231 transitions, 2611 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:56,206 INFO L231 Difference]: Finished difference. Result has 189 places, 187 transitions, 2008 flow [2024-06-27 21:06:56,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2008, PETRI_PLACES=189, PETRI_TRANSITIONS=187} [2024-06-27 21:06:56,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-27 21:06:56,206 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 187 transitions, 2008 flow [2024-06-27 21:06:56,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:06:56,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:56,207 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 21:06:56,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:06:56,207 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 21:06:56,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -653873325, now seen corresponding path program 3 times [2024-06-27 21:06:56,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598492748] [2024-06-27 21:06:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:58,394 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 21:06:58,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:58,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598492748] [2024-06-27 21:06:58,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598492748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:58,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:58,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147799785] [2024-06-27 21:06:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:58,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:58,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:58,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:58,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:06:58,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 187 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 21:06:58,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:58,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:06:58,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:02,121 INFO L124 PetriNetUnfolderBase]: 6445/9965 cut-off events. [2024-06-27 21:07:02,121 INFO L125 PetriNetUnfolderBase]: For 586662/586662 co-relation queries the response was YES. [2024-06-27 21:07:02,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62156 conditions, 9965 events. 6445/9965 cut-off events. For 586662/586662 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61213 event pairs, 2819 based on Foata normal form. 12/9975 useless extension candidates. Maximal degree in co-relation 62066. Up to 8897 conditions per place. [2024-06-27 21:07:02,183 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 261 selfloop transitions, 76 changer transitions 1/341 dead transitions. [2024-06-27 21:07:02,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 341 transitions, 4344 flow [2024-06-27 21:07:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 21:07:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 21:07:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 247 transitions. [2024-06-27 21:07:02,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37652439024390244 [2024-06-27 21:07:02,185 INFO L175 Difference]: Start difference. First operand has 189 places, 187 transitions, 2008 flow. Second operand 16 states and 247 transitions. [2024-06-27 21:07:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 341 transitions, 4344 flow [2024-06-27 21:07:02,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 341 transitions, 4157 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:02,713 INFO L231 Difference]: Finished difference. Result has 205 places, 257 transitions, 3079 flow [2024-06-27 21:07:02,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3079, PETRI_PLACES=205, PETRI_TRANSITIONS=257} [2024-06-27 21:07:02,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-27 21:07:02,714 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 257 transitions, 3079 flow [2024-06-27 21:07:02,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 21:07:02,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:02,714 INFO 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 21:07:02,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:07:02,715 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 21:07:02,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1774414391, now seen corresponding path program 3 times [2024-06-27 21:07:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:02,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878532604] [2024-06-27 21:07:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:05,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878532604] [2024-06-27 21:07:05,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878532604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:05,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:05,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504130537] [2024-06-27 21:07:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:05,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:05,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:05,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 257 transitions, 3079 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:05,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:05,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:05,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:07,929 INFO L124 PetriNetUnfolderBase]: 6409/9922 cut-off events. [2024-06-27 21:07:07,929 INFO L125 PetriNetUnfolderBase]: For 597021/597023 co-relation queries the response was YES. [2024-06-27 21:07:07,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62737 conditions, 9922 events. 6409/9922 cut-off events. For 597021/597023 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 60893 event pairs, 2848 based on Foata normal form. 14/9930 useless extension candidates. Maximal degree in co-relation 62641. Up to 9710 conditions per place. [2024-06-27 21:07:08,012 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 248 selfloop transitions, 29 changer transitions 0/280 dead transitions. [2024-06-27 21:07:08,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 280 transitions, 3713 flow [2024-06-27 21:07:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 21:07:08,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-27 21:07:08,013 INFO L175 Difference]: Start difference. First operand has 205 places, 257 transitions, 3079 flow. Second operand 7 states and 107 transitions. [2024-06-27 21:07:08,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 280 transitions, 3713 flow [2024-06-27 21:07:08,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 280 transitions, 3654 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 21:07:08,783 INFO L231 Difference]: Finished difference. Result has 208 places, 257 transitions, 3083 flow [2024-06-27 21:07:08,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3083, PETRI_PLACES=208, PETRI_TRANSITIONS=257} [2024-06-27 21:07:08,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 21:07:08,783 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 257 transitions, 3083 flow [2024-06-27 21:07:08,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:08,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:08,784 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 21:07:08,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:07:08,784 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 21:07:08,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1587247221, now seen corresponding path program 4 times [2024-06-27 21:07:08,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:08,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639149206] [2024-06-27 21:07:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:08,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639149206] [2024-06-27 21:07:11,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639149206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:11,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:11,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:11,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404567029] [2024-06-27 21:07:11,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:11,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:11,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:11,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 257 transitions, 3083 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:11,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:11,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:11,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:13,982 INFO L124 PetriNetUnfolderBase]: 6285/9751 cut-off events. [2024-06-27 21:07:13,983 INFO L125 PetriNetUnfolderBase]: For 600569/600577 co-relation queries the response was YES. [2024-06-27 21:07:14,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60372 conditions, 9751 events. 6285/9751 cut-off events. For 600569/600577 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 59880 event pairs, 2461 based on Foata normal form. 42/9789 useless extension candidates. Maximal degree in co-relation 60276. Up to 8274 conditions per place. [2024-06-27 21:07:14,053 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 108 changer transitions 2/292 dead transitions. [2024-06-27 21:07:14,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 292 transitions, 3861 flow [2024-06-27 21:07:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:07:14,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:07:14,054 INFO L175 Difference]: Start difference. First operand has 208 places, 257 transitions, 3083 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:07:14,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 292 transitions, 3861 flow [2024-06-27 21:07:14,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 292 transitions, 3785 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:14,747 INFO L231 Difference]: Finished difference. Result has 211 places, 255 transitions, 3212 flow [2024-06-27 21:07:14,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3212, PETRI_PLACES=211, PETRI_TRANSITIONS=255} [2024-06-27 21:07:14,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-27 21:07:14,747 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 255 transitions, 3212 flow [2024-06-27 21:07:14,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:14,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:14,748 INFO 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 21:07:14,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:07:14,748 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 21:07:14,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash -428734499, now seen corresponding path program 5 times [2024-06-27 21:07:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316621372] [2024-06-27 21:07:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:17,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316621372] [2024-06-27 21:07:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316621372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:17,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:17,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304732896] [2024-06-27 21:07:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:17,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:17,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 255 transitions, 3212 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:17,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:17,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:17,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:20,136 INFO L124 PetriNetUnfolderBase]: 6161/9591 cut-off events. [2024-06-27 21:07:20,136 INFO L125 PetriNetUnfolderBase]: For 585324/585332 co-relation queries the response was YES. [2024-06-27 21:07:20,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59145 conditions, 9591 events. 6161/9591 cut-off events. For 585324/585332 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 59030 event pairs, 2395 based on Foata normal form. 42/9629 useless extension candidates. Maximal degree in co-relation 59048. Up to 8214 conditions per place. [2024-06-27 21:07:20,216 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 113 changer transitions 2/302 dead transitions. [2024-06-27 21:07:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 302 transitions, 4125 flow [2024-06-27 21:07:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:07:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:07:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-27 21:07:20,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-27 21:07:20,218 INFO L175 Difference]: Start difference. First operand has 211 places, 255 transitions, 3212 flow. Second operand 11 states and 170 transitions. [2024-06-27 21:07:20,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 302 transitions, 4125 flow [2024-06-27 21:07:21,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 302 transitions, 3933 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:07:21,116 INFO L231 Difference]: Finished difference. Result has 214 places, 258 transitions, 3325 flow [2024-06-27 21:07:21,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3325, PETRI_PLACES=214, PETRI_TRANSITIONS=258} [2024-06-27 21:07:21,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 21:07:21,116 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 258 transitions, 3325 flow [2024-06-27 21:07:21,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:21,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:21,116 INFO 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 21:07:21,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:07:21,117 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 21:07:21,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1762773363, now seen corresponding path program 6 times [2024-06-27 21:07:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:21,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206933485] [2024-06-27 21:07:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:21,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:23,543 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 21:07:23,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:23,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206933485] [2024-06-27 21:07:23,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206933485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:23,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:23,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:23,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589394028] [2024-06-27 21:07:23,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:23,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:23,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:23,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:23,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 258 transitions, 3325 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:23,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:23,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:23,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:25,858 INFO L124 PetriNetUnfolderBase]: 6005/9351 cut-off events. [2024-06-27 21:07:25,858 INFO L125 PetriNetUnfolderBase]: For 534847/534869 co-relation queries the response was YES. [2024-06-27 21:07:25,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57961 conditions, 9351 events. 6005/9351 cut-off events. For 534847/534869 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 57264 event pairs, 1821 based on Foata normal form. 16/9361 useless extension candidates. Maximal degree in co-relation 57864. Up to 7728 conditions per place. [2024-06-27 21:07:25,937 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 120 changer transitions 2/289 dead transitions. [2024-06-27 21:07:25,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 289 transitions, 4087 flow [2024-06-27 21:07:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:07:25,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:07:25,938 INFO L175 Difference]: Start difference. First operand has 214 places, 258 transitions, 3325 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:07:25,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 289 transitions, 4087 flow [2024-06-27 21:07:26,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 289 transitions, 3847 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 21:07:26,893 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 3308 flow [2024-06-27 21:07:26,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3085, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3308, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-27 21:07:26,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 21:07:26,893 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 3308 flow [2024-06-27 21:07:26,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:26,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:26,893 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 21:07:26,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:07:26,894 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 21:07:26,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1762893333, now seen corresponding path program 7 times [2024-06-27 21:07:26,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:26,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432410063] [2024-06-27 21:07:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:29,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:29,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432410063] [2024-06-27 21:07:29,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432410063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:29,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:29,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:29,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947670318] [2024-06-27 21:07:29,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:29,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:29,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:29,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:29,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 3308 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:29,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:29,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:29,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:31,544 INFO L124 PetriNetUnfolderBase]: 5653/8792 cut-off events. [2024-06-27 21:07:31,544 INFO L125 PetriNetUnfolderBase]: For 545662/545690 co-relation queries the response was YES. [2024-06-27 21:07:31,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55777 conditions, 8792 events. 5653/8792 cut-off events. For 545662/545690 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 53207 event pairs, 2199 based on Foata normal form. 30/8818 useless extension candidates. Maximal degree in co-relation 55679. Up to 8450 conditions per place. [2024-06-27 21:07:31,619 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 61 changer transitions 3/279 dead transitions. [2024-06-27 21:07:31,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 279 transitions, 3924 flow [2024-06-27 21:07:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 21:07:31,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-27 21:07:31,621 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 3308 flow. Second operand 8 states and 119 transitions. [2024-06-27 21:07:31,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 279 transitions, 3924 flow [2024-06-27 21:07:32,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 279 transitions, 3531 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:32,615 INFO L231 Difference]: Finished difference. Result has 211 places, 253 transitions, 3001 flow [2024-06-27 21:07:32,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3001, PETRI_PLACES=211, PETRI_TRANSITIONS=253} [2024-06-27 21:07:32,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-27 21:07:32,616 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 253 transitions, 3001 flow [2024-06-27 21:07:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:32,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:32,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:07:32,617 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 21:07:32,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash 619799427, now seen corresponding path program 1 times [2024-06-27 21:07:32,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269226238] [2024-06-27 21:07:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:35,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269226238] [2024-06-27 21:07:35,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269226238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:35,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:35,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035090061] [2024-06-27 21:07:35,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:35,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:35,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 253 transitions, 3001 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:35,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:35,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:35,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:37,702 INFO L124 PetriNetUnfolderBase]: 5401/8414 cut-off events. [2024-06-27 21:07:37,702 INFO L125 PetriNetUnfolderBase]: For 553654/553656 co-relation queries the response was YES. [2024-06-27 21:07:37,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53611 conditions, 8414 events. 5401/8414 cut-off events. For 553654/553656 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 50593 event pairs, 2268 based on Foata normal form. 10/8418 useless extension candidates. Maximal degree in co-relation 53513. Up to 8104 conditions per place. [2024-06-27 21:07:37,766 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 32 changer transitions 0/279 dead transitions. [2024-06-27 21:07:37,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 279 transitions, 3669 flow [2024-06-27 21:07:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:07:37,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-27 21:07:37,768 INFO L175 Difference]: Start difference. First operand has 211 places, 253 transitions, 3001 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:07:37,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 279 transitions, 3669 flow [2024-06-27 21:07:38,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 279 transitions, 3449 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:07:38,587 INFO L231 Difference]: Finished difference. Result has 209 places, 254 transitions, 2875 flow [2024-06-27 21:07:38,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2875, PETRI_PLACES=209, PETRI_TRANSITIONS=254} [2024-06-27 21:07:38,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-27 21:07:38,587 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 254 transitions, 2875 flow [2024-06-27 21:07:38,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:38,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:38,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:38,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:07:38,588 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:38,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 249886063, now seen corresponding path program 1 times [2024-06-27 21:07:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:38,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080853143] [2024-06-27 21:07:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:41,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:41,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080853143] [2024-06-27 21:07:41,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080853143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:41,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:41,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:41,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110748226] [2024-06-27 21:07:41,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:41,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:41,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:41,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:41,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:41,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:41,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 254 transitions, 2875 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:41,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:41,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:41,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:43,843 INFO L124 PetriNetUnfolderBase]: 5389/8399 cut-off events. [2024-06-27 21:07:43,843 INFO L125 PetriNetUnfolderBase]: For 556605/556613 co-relation queries the response was YES. [2024-06-27 21:07:43,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53349 conditions, 8399 events. 5389/8399 cut-off events. For 556605/556613 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 50646 event pairs, 2070 based on Foata normal form. 10/8405 useless extension candidates. Maximal degree in co-relation 53250. Up to 7958 conditions per place. [2024-06-27 21:07:43,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 72 changer transitions 0/287 dead transitions. [2024-06-27 21:07:43,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 287 transitions, 3647 flow [2024-06-27 21:07:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:07:43,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:07:43,917 INFO L175 Difference]: Start difference. First operand has 209 places, 254 transitions, 2875 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:07:43,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 287 transitions, 3647 flow [2024-06-27 21:07:44,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 287 transitions, 3563 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:44,766 INFO L231 Difference]: Finished difference. Result has 212 places, 254 transitions, 2941 flow [2024-06-27 21:07:44,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2941, PETRI_PLACES=212, PETRI_TRANSITIONS=254} [2024-06-27 21:07:44,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 21:07:44,767 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 254 transitions, 2941 flow [2024-06-27 21:07:44,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:44,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:44,767 INFO 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 21:07:44,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:07:44,767 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 21:07:44,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1572669839, now seen corresponding path program 4 times [2024-06-27 21:07:44,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:44,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860011246] [2024-06-27 21:07:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:44,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:47,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860011246] [2024-06-27 21:07:47,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860011246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:47,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:47,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:47,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572250061] [2024-06-27 21:07:47,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:47,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:47,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:47,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:47,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 254 transitions, 2941 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:47,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:47,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:47,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:50,096 INFO L124 PetriNetUnfolderBase]: 5407/8428 cut-off events. [2024-06-27 21:07:50,097 INFO L125 PetriNetUnfolderBase]: For 582979/582981 co-relation queries the response was YES. [2024-06-27 21:07:50,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53733 conditions, 8428 events. 5407/8428 cut-off events. For 582979/582981 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 50801 event pairs, 2306 based on Foata normal form. 14/8436 useless extension candidates. Maximal degree in co-relation 53633. Up to 8192 conditions per place. [2024-06-27 21:07:50,162 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 245 selfloop transitions, 32 changer transitions 0/280 dead transitions. [2024-06-27 21:07:50,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 280 transitions, 3607 flow [2024-06-27 21:07:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-27 21:07:50,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-27 21:07:50,164 INFO L175 Difference]: Start difference. First operand has 212 places, 254 transitions, 2941 flow. Second operand 8 states and 118 transitions. [2024-06-27 21:07:50,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 280 transitions, 3607 flow [2024-06-27 21:07:51,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 280 transitions, 3435 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:51,037 INFO L231 Difference]: Finished difference. Result has 213 places, 255 transitions, 2866 flow [2024-06-27 21:07:51,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2866, PETRI_PLACES=213, PETRI_TRANSITIONS=255} [2024-06-27 21:07:51,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 21:07:51,037 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 255 transitions, 2866 flow [2024-06-27 21:07:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:51,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:51,038 INFO 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 21:07:51,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:07:51,038 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 21:07:51,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash 376367923, now seen corresponding path program 2 times [2024-06-27 21:07:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:51,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945808781] [2024-06-27 21:07:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:51,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:54,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:54,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945808781] [2024-06-27 21:07:54,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945808781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:54,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:54,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:54,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161685681] [2024-06-27 21:07:54,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:54,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:54,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:54,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:54,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:07:54,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 255 transitions, 2866 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:54,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:54,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:07:54,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:56,880 INFO L124 PetriNetUnfolderBase]: 5427/8453 cut-off events. [2024-06-27 21:07:56,880 INFO L125 PetriNetUnfolderBase]: For 588345/588353 co-relation queries the response was YES. [2024-06-27 21:07:56,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53973 conditions, 8453 events. 5427/8453 cut-off events. For 588345/588353 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 50950 event pairs, 2070 based on Foata normal form. 10/8459 useless extension candidates. Maximal degree in co-relation 53872. Up to 8004 conditions per place. [2024-06-27 21:07:56,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 208 selfloop transitions, 73 changer transitions 0/284 dead transitions. [2024-06-27 21:07:56,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 284 transitions, 3648 flow [2024-06-27 21:07:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:07:56,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 21:07:56,943 INFO L175 Difference]: Start difference. First operand has 213 places, 255 transitions, 2866 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:07:56,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 284 transitions, 3648 flow [2024-06-27 21:07:57,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 284 transitions, 3567 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:57,827 INFO L231 Difference]: Finished difference. Result has 215 places, 258 transitions, 2969 flow [2024-06-27 21:07:57,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2969, PETRI_PLACES=215, PETRI_TRANSITIONS=258} [2024-06-27 21:07:57,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-27 21:07:57,827 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 258 transitions, 2969 flow [2024-06-27 21:07:57,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:07:57,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:57,828 INFO 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 21:07:57,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:07:57,828 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 21:07:57,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash 376367737, now seen corresponding path program 8 times [2024-06-27 21:07:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:57,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016368071] [2024-06-27 21:07:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:57,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:00,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:00,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016368071] [2024-06-27 21:08:00,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016368071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:00,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:00,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:00,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311978490] [2024-06-27 21:08:00,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:00,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:00,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:00,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:00,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:00,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 258 transitions, 2969 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:00,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:00,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:02,925 INFO L124 PetriNetUnfolderBase]: 5487/8537 cut-off events. [2024-06-27 21:08:02,925 INFO L125 PetriNetUnfolderBase]: For 619899/619907 co-relation queries the response was YES. [2024-06-27 21:08:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54658 conditions, 8537 events. 5487/8537 cut-off events. For 619899/619907 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 51401 event pairs, 1972 based on Foata normal form. 18/8551 useless extension candidates. Maximal degree in co-relation 54556. Up to 6904 conditions per place. [2024-06-27 21:08:03,002 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 139 changer transitions 0/305 dead transitions. [2024-06-27 21:08:03,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 305 transitions, 4091 flow [2024-06-27 21:08:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:08:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:08:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:08:03,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-27 21:08:03,003 INFO L175 Difference]: Start difference. First operand has 215 places, 258 transitions, 2969 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:08:03,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 305 transitions, 4091 flow [2024-06-27 21:08:04,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 305 transitions, 3974 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:04,119 INFO L231 Difference]: Finished difference. Result has 220 places, 264 transitions, 3193 flow [2024-06-27 21:08:04,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3193, PETRI_PLACES=220, PETRI_TRANSITIONS=264} [2024-06-27 21:08:04,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-27 21:08:04,120 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 264 transitions, 3193 flow [2024-06-27 21:08:04,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:04,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:04,120 INFO 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 21:08:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:08:04,120 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 21:08:04,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2004542551, now seen corresponding path program 9 times [2024-06-27 21:08:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802638486] [2024-06-27 21:08:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:06,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:06,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802638486] [2024-06-27 21:08:06,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802638486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:06,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:06,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:06,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840358072] [2024-06-27 21:08:06,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:06,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:06,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:06,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 264 transitions, 3193 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:06,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:06,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:06,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:08,877 INFO L124 PetriNetUnfolderBase]: 5507/8569 cut-off events. [2024-06-27 21:08:08,878 INFO L125 PetriNetUnfolderBase]: For 629977/630001 co-relation queries the response was YES. [2024-06-27 21:08:08,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55847 conditions, 8569 events. 5507/8569 cut-off events. For 629977/630001 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51725 event pairs, 2106 based on Foata normal form. 16/8580 useless extension candidates. Maximal degree in co-relation 55744. Up to 8100 conditions per place. [2024-06-27 21:08:08,944 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 76 changer transitions 0/290 dead transitions. [2024-06-27 21:08:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 290 transitions, 3986 flow [2024-06-27 21:08:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:08:08,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-27 21:08:08,945 INFO L175 Difference]: Start difference. First operand has 220 places, 264 transitions, 3193 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:08:08,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 290 transitions, 3986 flow [2024-06-27 21:08:09,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 290 transitions, 3780 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:09,968 INFO L231 Difference]: Finished difference. Result has 222 places, 267 transitions, 3186 flow [2024-06-27 21:08:09,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2989, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3186, PETRI_PLACES=222, PETRI_TRANSITIONS=267} [2024-06-27 21:08:09,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 21:08:09,969 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 267 transitions, 3186 flow [2024-06-27 21:08:09,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:09,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:09,969 INFO 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 21:08:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:08:09,969 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 21:08:09,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 405363651, now seen corresponding path program 3 times [2024-06-27 21:08:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:09,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442679959] [2024-06-27 21:08:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:09,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442679959] [2024-06-27 21:08:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442679959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:12,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:12,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:12,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976350599] [2024-06-27 21:08:12,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:12,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:12,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:12,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:12,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:12,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 267 transitions, 3186 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:12,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:12,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:12,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:15,038 INFO L124 PetriNetUnfolderBase]: 5527/8597 cut-off events. [2024-06-27 21:08:15,038 INFO L125 PetriNetUnfolderBase]: For 650968/650992 co-relation queries the response was YES. [2024-06-27 21:08:15,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55890 conditions, 8597 events. 5527/8597 cut-off events. For 650968/650992 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 51838 event pairs, 2106 based on Foata normal form. 16/8608 useless extension candidates. Maximal degree in co-relation 55786. Up to 8132 conditions per place. [2024-06-27 21:08:15,295 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 216 selfloop transitions, 76 changer transitions 0/295 dead transitions. [2024-06-27 21:08:15,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 295 transitions, 4002 flow [2024-06-27 21:08:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-27 21:08:15,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-27 21:08:15,296 INFO L175 Difference]: Start difference. First operand has 222 places, 267 transitions, 3186 flow. Second operand 9 states and 132 transitions. [2024-06-27 21:08:15,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 295 transitions, 4002 flow [2024-06-27 21:08:16,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 295 transitions, 3832 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:16,215 INFO L231 Difference]: Finished difference. Result has 225 places, 270 transitions, 3216 flow [2024-06-27 21:08:16,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3216, PETRI_PLACES=225, PETRI_TRANSITIONS=270} [2024-06-27 21:08:16,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 21:08:16,215 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 270 transitions, 3216 flow [2024-06-27 21:08:16,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:16,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:16,215 INFO 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 21:08:16,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:08:16,216 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 21:08:16,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1381669681, now seen corresponding path program 4 times [2024-06-27 21:08:16,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:16,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357765108] [2024-06-27 21:08:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:16,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:19,031 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 21:08:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357765108] [2024-06-27 21:08:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357765108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:19,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527633284] [2024-06-27 21:08:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:19,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:19,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 270 transitions, 3216 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:19,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:19,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:19,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:21,556 INFO L124 PetriNetUnfolderBase]: 5515/8581 cut-off events. [2024-06-27 21:08:21,556 INFO L125 PetriNetUnfolderBase]: For 663083/663107 co-relation queries the response was YES. [2024-06-27 21:08:21,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55839 conditions, 8581 events. 5515/8581 cut-off events. For 663083/663107 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 51782 event pairs, 2108 based on Foata normal form. 16/8592 useless extension candidates. Maximal degree in co-relation 55734. Up to 8124 conditions per place. [2024-06-27 21:08:21,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 78 changer transitions 0/291 dead transitions. [2024-06-27 21:08:21,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 291 transitions, 3852 flow [2024-06-27 21:08:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 21:08:21,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:08:21,638 INFO L175 Difference]: Start difference. First operand has 225 places, 270 transitions, 3216 flow. Second operand 8 states and 120 transitions. [2024-06-27 21:08:21,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 291 transitions, 3852 flow [2024-06-27 21:08:22,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 291 transitions, 3619 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 21:08:22,747 INFO L231 Difference]: Finished difference. Result has 225 places, 270 transitions, 3145 flow [2024-06-27 21:08:22,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3145, PETRI_PLACES=225, PETRI_TRANSITIONS=270} [2024-06-27 21:08:22,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 21:08:22,748 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 270 transitions, 3145 flow [2024-06-27 21:08:22,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:22,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:22,748 INFO 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 21:08:22,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:08:22,748 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 21:08:22,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:22,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1204418005, now seen corresponding path program 10 times [2024-06-27 21:08:22,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:22,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992866251] [2024-06-27 21:08:22,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:22,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:25,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:25,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992866251] [2024-06-27 21:08:25,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992866251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:25,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:25,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595679421] [2024-06-27 21:08:25,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:25,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:25,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 270 transitions, 3145 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:25,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:25,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:25,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:27,809 INFO L124 PetriNetUnfolderBase]: 5503/8568 cut-off events. [2024-06-27 21:08:27,810 INFO L125 PetriNetUnfolderBase]: For 674283/674301 co-relation queries the response was YES. [2024-06-27 21:08:27,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55496 conditions, 8568 events. 5503/8568 cut-off events. For 674283/674301 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51696 event pairs, 1930 based on Foata normal form. 6/8567 useless extension candidates. Maximal degree in co-relation 55391. Up to 6542 conditions per place. [2024-06-27 21:08:27,869 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 151 selfloop transitions, 151 changer transitions 0/305 dead transitions. [2024-06-27 21:08:27,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 305 transitions, 4289 flow [2024-06-27 21:08:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:08:27,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:08:27,871 INFO L175 Difference]: Start difference. First operand has 225 places, 270 transitions, 3145 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:08:27,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 305 transitions, 4289 flow [2024-06-27 21:08:28,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 305 transitions, 4087 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:08:28,734 INFO L231 Difference]: Finished difference. Result has 226 places, 276 transitions, 3416 flow [2024-06-27 21:08:28,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3416, PETRI_PLACES=226, PETRI_TRANSITIONS=276} [2024-06-27 21:08:28,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-27 21:08:28,734 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 276 transitions, 3416 flow [2024-06-27 21:08:28,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:28,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:28,734 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 21:08:28,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:08:28,735 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 21:08:28,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:28,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1198933383, now seen corresponding path program 11 times [2024-06-27 21:08:28,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:28,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284053261] [2024-06-27 21:08:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:31,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:31,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284053261] [2024-06-27 21:08:31,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284053261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:31,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:31,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:31,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56898791] [2024-06-27 21:08:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:31,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:31,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:31,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:31,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 276 transitions, 3416 flow. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:31,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:31,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:31,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:33,759 INFO L124 PetriNetUnfolderBase]: 5491/8549 cut-off events. [2024-06-27 21:08:33,760 INFO L125 PetriNetUnfolderBase]: For 694200/694224 co-relation queries the response was YES. [2024-06-27 21:08:33,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57629 conditions, 8549 events. 5491/8549 cut-off events. For 694200/694224 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51620 event pairs, 2100 based on Foata normal form. 16/8560 useless extension candidates. Maximal degree in co-relation 57522. Up to 8028 conditions per place. [2024-06-27 21:08:33,836 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 88 changer transitions 0/300 dead transitions. [2024-06-27 21:08:33,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 300 transitions, 4078 flow [2024-06-27 21:08:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-27 21:08:33,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-27 21:08:33,837 INFO L175 Difference]: Start difference. First operand has 226 places, 276 transitions, 3416 flow. Second operand 9 states and 132 transitions. [2024-06-27 21:08:33,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 300 transitions, 4078 flow [2024-06-27 21:08:35,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 300 transitions, 3923 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:35,101 INFO L231 Difference]: Finished difference. Result has 232 places, 276 transitions, 3443 flow [2024-06-27 21:08:35,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3443, PETRI_PLACES=232, PETRI_TRANSITIONS=276} [2024-06-27 21:08:35,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 21:08:35,101 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 276 transitions, 3443 flow [2024-06-27 21:08:35,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 21:08:35,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:35,101 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 21:08:35,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:08:35,102 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 21:08:35,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1216402481, now seen corresponding path program 2 times [2024-06-27 21:08:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:35,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928656781] [2024-06-27 21:08:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:35,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:38,189 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 21:08:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928656781] [2024-06-27 21:08:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928656781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:38,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:38,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:38,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068307301] [2024-06-27 21:08:38,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:38,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:38,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:38,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 276 transitions, 3443 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:08:38,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:38,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:38,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:40,479 INFO L124 PetriNetUnfolderBase]: 5519/8592 cut-off events. [2024-06-27 21:08:40,479 INFO L125 PetriNetUnfolderBase]: For 723924/723926 co-relation queries the response was YES. [2024-06-27 21:08:40,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58371 conditions, 8592 events. 5519/8592 cut-off events. For 723924/723926 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 51823 event pairs, 2298 based on Foata normal form. 10/8596 useless extension candidates. Maximal degree in co-relation 58261. Up to 8318 conditions per place. [2024-06-27 21:08:40,550 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 34 changer transitions 0/305 dead transitions. [2024-06-27 21:08:40,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 305 transitions, 4181 flow [2024-06-27 21:08:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:08:40,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-27 21:08:40,552 INFO L175 Difference]: Start difference. First operand has 232 places, 276 transitions, 3443 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:08:40,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 305 transitions, 4181 flow [2024-06-27 21:08:41,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 305 transitions, 3869 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 21:08:41,781 INFO L231 Difference]: Finished difference. Result has 230 places, 277 transitions, 3233 flow [2024-06-27 21:08:41,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3233, PETRI_PLACES=230, PETRI_TRANSITIONS=277} [2024-06-27 21:08:41,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 21:08:41,782 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 277 transitions, 3233 flow [2024-06-27 21:08:41,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:08:41,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:41,783 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] [2024-06-27 21:08:41,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:08:41,783 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 21:08:41,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash -962512007, now seen corresponding path program 3 times [2024-06-27 21:08:41,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:41,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684665764] [2024-06-27 21:08:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:41,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:44,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:44,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684665764] [2024-06-27 21:08:44,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684665764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:44,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:44,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:44,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163432153] [2024-06-27 21:08:44,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:44,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:44,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:44,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:44,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 277 transitions, 3233 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:08:44,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:44,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:44,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:47,095 INFO L124 PetriNetUnfolderBase]: 5501/8566 cut-off events. [2024-06-27 21:08:47,095 INFO L125 PetriNetUnfolderBase]: For 723902/723904 co-relation queries the response was YES. [2024-06-27 21:08:47,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57460 conditions, 8566 events. 5501/8566 cut-off events. For 723902/723904 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 51645 event pairs, 2258 based on Foata normal form. 10/8570 useless extension candidates. Maximal degree in co-relation 57349. Up to 8102 conditions per place. [2024-06-27 21:08:47,155 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 260 selfloop transitions, 41 changer transitions 0/304 dead transitions. [2024-06-27 21:08:47,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 304 transitions, 3937 flow [2024-06-27 21:08:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 21:08:47,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-27 21:08:47,157 INFO L175 Difference]: Start difference. First operand has 230 places, 277 transitions, 3233 flow. Second operand 8 states and 119 transitions. [2024-06-27 21:08:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 304 transitions, 3937 flow [2024-06-27 21:08:48,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 304 transitions, 3849 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:48,170 INFO L231 Difference]: Finished difference. Result has 232 places, 277 transitions, 3231 flow [2024-06-27 21:08:48,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3231, PETRI_PLACES=232, PETRI_TRANSITIONS=277} [2024-06-27 21:08:48,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 21:08:48,171 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 277 transitions, 3231 flow [2024-06-27 21:08:48,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:08:48,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:48,171 INFO 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 21:08:48,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:08:48,171 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 21:08:48,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash 258465871, now seen corresponding path program 1 times [2024-06-27 21:08:48,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613042417] [2024-06-27 21:08:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:48,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:51,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613042417] [2024-06-27 21:08:51,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613042417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:51,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:51,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612313147] [2024-06-27 21:08:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:51,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:51,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:51,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:51,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:51,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 277 transitions, 3231 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 21:08:51,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:51,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:51,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:53,361 INFO L124 PetriNetUnfolderBase]: 5549/8641 cut-off events. [2024-06-27 21:08:53,361 INFO L125 PetriNetUnfolderBase]: For 754093/754093 co-relation queries the response was YES. [2024-06-27 21:08:53,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58310 conditions, 8641 events. 5549/8641 cut-off events. For 754093/754093 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 52300 event pairs, 2447 based on Foata normal form. 8/8647 useless extension candidates. Maximal degree in co-relation 58198. Up to 8367 conditions per place. [2024-06-27 21:08:53,437 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 288 selfloop transitions, 21 changer transitions 0/312 dead transitions. [2024-06-27 21:08:53,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 312 transitions, 4133 flow [2024-06-27 21:08:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 21:08:53,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-27 21:08:53,438 INFO L175 Difference]: Start difference. First operand has 232 places, 277 transitions, 3231 flow. Second operand 7 states and 117 transitions. [2024-06-27 21:08:53,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 312 transitions, 4133 flow [2024-06-27 21:08:54,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 312 transitions, 3884 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 21:08:54,685 INFO L231 Difference]: Finished difference. Result has 230 places, 279 transitions, 3058 flow [2024-06-27 21:08:54,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3058, PETRI_PLACES=230, PETRI_TRANSITIONS=279} [2024-06-27 21:08:54,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 21:08:54,686 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 279 transitions, 3058 flow [2024-06-27 21:08:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 21:08:54,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:54,686 INFO 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 21:08:54,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:08:54,686 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 21:08:54,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1213076433, now seen corresponding path program 1 times [2024-06-27 21:08:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:54,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423744472] [2024-06-27 21:08:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:54,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423744472] [2024-06-27 21:08:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423744472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:57,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817478704] [2024-06-27 21:08:57,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:57,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:57,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:08:57,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 279 transitions, 3058 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 21:08:57,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:57,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:08:57,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:59,780 INFO L124 PetriNetUnfolderBase]: 5531/8615 cut-off events. [2024-06-27 21:08:59,780 INFO L125 PetriNetUnfolderBase]: For 752755/752755 co-relation queries the response was YES. [2024-06-27 21:08:59,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57132 conditions, 8615 events. 5531/8615 cut-off events. For 752755/752755 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 52135 event pairs, 2427 based on Foata normal form. 8/8621 useless extension candidates. Maximal degree in co-relation 57022. Up to 8359 conditions per place. [2024-06-27 21:08:59,855 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 286 selfloop transitions, 22 changer transitions 0/311 dead transitions. [2024-06-27 21:08:59,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 311 transitions, 3790 flow [2024-06-27 21:08:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:08:59,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-27 21:08:59,856 INFO L175 Difference]: Start difference. First operand has 230 places, 279 transitions, 3058 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:08:59,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 311 transitions, 3790 flow [2024-06-27 21:09:01,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 311 transitions, 3758 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:09:01,104 INFO L231 Difference]: Finished difference. Result has 234 places, 279 transitions, 3075 flow [2024-06-27 21:09:01,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3075, PETRI_PLACES=234, PETRI_TRANSITIONS=279} [2024-06-27 21:09:01,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 21:09:01,104 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 279 transitions, 3075 flow [2024-06-27 21:09:01,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 21:09:01,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:01,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:01,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:09:01,105 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 21:09:01,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2106375761, now seen corresponding path program 2 times [2024-06-27 21:09:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:01,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537874056] [2024-06-27 21:09:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:01,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:04,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:04,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537874056] [2024-06-27 21:09:04,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537874056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:04,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:04,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:09:04,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837327390] [2024-06-27 21:09:04,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:04,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:09:04,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:04,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:09:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:09:04,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:04,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 279 transitions, 3075 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 21:09:04,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:04,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:04,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:06,890 INFO L124 PetriNetUnfolderBase]: 5513/8591 cut-off events. [2024-06-27 21:09:06,891 INFO L125 PetriNetUnfolderBase]: For 754958/754958 co-relation queries the response was YES. [2024-06-27 21:09:06,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56828 conditions, 8591 events. 5513/8591 cut-off events. For 754958/754958 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 52005 event pairs, 2387 based on Foata normal form. 8/8596 useless extension candidates. Maximal degree in co-relation 56716. Up to 8287 conditions per place. [2024-06-27 21:09:06,969 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 282 selfloop transitions, 23 changer transitions 0/308 dead transitions. [2024-06-27 21:09:06,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 308 transitions, 3791 flow [2024-06-27 21:09:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:09:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:09:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:09:06,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-27 21:09:06,971 INFO L175 Difference]: Start difference. First operand has 234 places, 279 transitions, 3075 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:09:06,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 308 transitions, 3791 flow [2024-06-27 21:09:08,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 308 transitions, 3735 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:08,224 INFO L231 Difference]: Finished difference. Result has 235 places, 279 transitions, 3069 flow [2024-06-27 21:09:08,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3069, PETRI_PLACES=235, PETRI_TRANSITIONS=279} [2024-06-27 21:09:08,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 21:09:08,225 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 279 transitions, 3069 flow [2024-06-27 21:09:08,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 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 21:09:08,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:08,225 INFO 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 21:09:08,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:09:08,225 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 21:09:08,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2020013673, now seen corresponding path program 1 times [2024-06-27 21:09:08,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:08,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252300490] [2024-06-27 21:09:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:11,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252300490] [2024-06-27 21:09:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252300490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:11,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:11,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:11,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688170152] [2024-06-27 21:09:11,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:11,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:11,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:11,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:11,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 279 transitions, 3069 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:11,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:11,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:11,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:14,558 INFO L124 PetriNetUnfolderBase]: 5565/8671 cut-off events. [2024-06-27 21:09:14,558 INFO L125 PetriNetUnfolderBase]: For 793124/793129 co-relation queries the response was YES. [2024-06-27 21:09:14,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57615 conditions, 8671 events. 5565/8671 cut-off events. For 793124/793129 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 52541 event pairs, 2108 based on Foata normal form. 18/8685 useless extension candidates. Maximal degree in co-relation 57502. Up to 8222 conditions per place. [2024-06-27 21:09:14,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 246 selfloop transitions, 64 changer transitions 0/313 dead transitions. [2024-06-27 21:09:14,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 313 transitions, 3847 flow [2024-06-27 21:09:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 21:09:14,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-27 21:09:14,637 INFO L175 Difference]: Start difference. First operand has 235 places, 279 transitions, 3069 flow. Second operand 9 states and 139 transitions. [2024-06-27 21:09:14,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 313 transitions, 3847 flow [2024-06-27 21:09:15,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 313 transitions, 3778 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:15,808 INFO L231 Difference]: Finished difference. Result has 238 places, 281 transitions, 3196 flow [2024-06-27 21:09:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3196, PETRI_PLACES=238, PETRI_TRANSITIONS=281} [2024-06-27 21:09:15,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 21:09:15,808 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 281 transitions, 3196 flow [2024-06-27 21:09:15,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:15,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:15,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:15,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:09:15,809 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 21:09:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2026300109, now seen corresponding path program 2 times [2024-06-27 21:09:15,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:15,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517422107] [2024-06-27 21:09:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:19,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:19,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517422107] [2024-06-27 21:09:19,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517422107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:19,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76490095] [2024-06-27 21:09:19,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:19,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:19,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 281 transitions, 3196 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:19,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:19,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:19,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:21,239 INFO L124 PetriNetUnfolderBase]: 5573/8680 cut-off events. [2024-06-27 21:09:21,239 INFO L125 PetriNetUnfolderBase]: For 783537/783562 co-relation queries the response was YES. [2024-06-27 21:09:21,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58158 conditions, 8680 events. 5573/8680 cut-off events. For 783537/783562 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 52512 event pairs, 2059 based on Foata normal form. 22/8698 useless extension candidates. Maximal degree in co-relation 58045. Up to 8356 conditions per place. [2024-06-27 21:09:21,308 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 61 changer transitions 0/305 dead transitions. [2024-06-27 21:09:21,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 305 transitions, 3914 flow [2024-06-27 21:09:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-27 21:09:21,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-27 21:09:21,309 INFO L175 Difference]: Start difference. First operand has 238 places, 281 transitions, 3196 flow. Second operand 8 states and 118 transitions. [2024-06-27 21:09:21,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 305 transitions, 3914 flow [2024-06-27 21:09:22,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 305 transitions, 3746 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:22,537 INFO L231 Difference]: Finished difference. Result has 239 places, 283 transitions, 3217 flow [2024-06-27 21:09:22,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=239, PETRI_TRANSITIONS=283} [2024-06-27 21:09:22,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 21:09:22,538 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 283 transitions, 3217 flow [2024-06-27 21:09:22,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:22,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:22,538 INFO 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 21:09:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:09:22,538 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 21:09:22,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1978616591, now seen corresponding path program 3 times [2024-06-27 21:09:22,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:22,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286612479] [2024-06-27 21:09:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:25,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:25,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286612479] [2024-06-27 21:09:25,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286612479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:25,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:25,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593119785] [2024-06-27 21:09:25,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:25,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:25,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:25,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:25,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 283 transitions, 3217 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:25,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:25,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:25,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:27,980 INFO L124 PetriNetUnfolderBase]: 5581/8692 cut-off events. [2024-06-27 21:09:27,981 INFO L125 PetriNetUnfolderBase]: For 744916/744941 co-relation queries the response was YES. [2024-06-27 21:09:28,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57443 conditions, 8692 events. 5581/8692 cut-off events. For 744916/744941 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 52671 event pairs, 1983 based on Foata normal form. 22/8710 useless extension candidates. Maximal degree in co-relation 57329. Up to 8202 conditions per place. [2024-06-27 21:09:28,069 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 69 changer transitions 0/312 dead transitions. [2024-06-27 21:09:28,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 312 transitions, 3983 flow [2024-06-27 21:09:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:09:28,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:09:28,070 INFO L175 Difference]: Start difference. First operand has 239 places, 283 transitions, 3217 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:09:28,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 312 transitions, 3983 flow [2024-06-27 21:09:29,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 312 transitions, 3816 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:29,290 INFO L231 Difference]: Finished difference. Result has 241 places, 285 transitions, 3256 flow [2024-06-27 21:09:29,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3052, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3256, PETRI_PLACES=241, PETRI_TRANSITIONS=285} [2024-06-27 21:09:29,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 21:09:29,291 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 285 transitions, 3256 flow [2024-06-27 21:09:29,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:29,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:29,291 INFO 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 21:09:29,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:09:29,292 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 21:09:29,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:29,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2116129218, now seen corresponding path program 1 times [2024-06-27 21:09:29,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:29,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522790883] [2024-06-27 21:09:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:32,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522790883] [2024-06-27 21:09:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522790883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:32,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:32,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:32,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664282395] [2024-06-27 21:09:32,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:32,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:32,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:32,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:32,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 285 transitions, 3256 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:32,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:32,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:32,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:35,513 INFO L124 PetriNetUnfolderBase]: 5621/8743 cut-off events. [2024-06-27 21:09:35,513 INFO L125 PetriNetUnfolderBase]: For 758933/758938 co-relation queries the response was YES. [2024-06-27 21:09:35,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57715 conditions, 8743 events. 5621/8743 cut-off events. For 758933/758938 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52971 event pairs, 1943 based on Foata normal form. 12/8751 useless extension candidates. Maximal degree in co-relation 57600. Up to 7066 conditions per place. [2024-06-27 21:09:35,601 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 150 changer transitions 0/354 dead transitions. [2024-06-27 21:09:35,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 354 transitions, 4440 flow [2024-06-27 21:09:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:09:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:09:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-27 21:09:35,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977485928705441 [2024-06-27 21:09:35,602 INFO L175 Difference]: Start difference. First operand has 241 places, 285 transitions, 3256 flow. Second operand 13 states and 212 transitions. [2024-06-27 21:09:35,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 354 transitions, 4440 flow [2024-06-27 21:09:37,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 354 transitions, 4252 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:37,141 INFO L231 Difference]: Finished difference. Result has 248 places, 288 transitions, 3404 flow [2024-06-27 21:09:37,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3404, PETRI_PLACES=248, PETRI_TRANSITIONS=288} [2024-06-27 21:09:37,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 21:09:37,142 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 288 transitions, 3404 flow [2024-06-27 21:09:37,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:37,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:37,142 INFO 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 21:09:37,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:09:37,142 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 21:09:37,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:37,143 INFO L85 PathProgramCache]: Analyzing trace with hash -843465022, now seen corresponding path program 2 times [2024-06-27 21:09:37,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:37,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157527732] [2024-06-27 21:09:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:40,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157527732] [2024-06-27 21:09:40,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157527732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:40,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:40,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029177010] [2024-06-27 21:09:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:40,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:40,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:40,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:40,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:40,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 288 transitions, 3404 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:40,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:40,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:40,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:43,471 INFO L124 PetriNetUnfolderBase]: 5597/8711 cut-off events. [2024-06-27 21:09:43,472 INFO L125 PetriNetUnfolderBase]: For 741362/741367 co-relation queries the response was YES. [2024-06-27 21:09:43,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57676 conditions, 8711 events. 5597/8711 cut-off events. For 741362/741367 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52861 event pairs, 1934 based on Foata normal form. 12/8719 useless extension candidates. Maximal degree in co-relation 57560. Up to 7054 conditions per place. [2024-06-27 21:09:43,546 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 200 selfloop transitions, 150 changer transitions 0/353 dead transitions. [2024-06-27 21:09:43,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 353 transitions, 4420 flow [2024-06-27 21:09:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:09:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:09:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 211 transitions. [2024-06-27 21:09:43,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39587242026266417 [2024-06-27 21:09:43,548 INFO L175 Difference]: Start difference. First operand has 248 places, 288 transitions, 3404 flow. Second operand 13 states and 211 transitions. [2024-06-27 21:09:43,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 353 transitions, 4420 flow [2024-06-27 21:09:44,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 353 transitions, 4074 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 21:09:44,448 INFO L231 Difference]: Finished difference. Result has 250 places, 288 transitions, 3364 flow [2024-06-27 21:09:44,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3364, PETRI_PLACES=250, PETRI_TRANSITIONS=288} [2024-06-27 21:09:44,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-27 21:09:44,449 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 288 transitions, 3364 flow [2024-06-27 21:09:44,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:44,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:44,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:09:44,450 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 21:09:44,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -864681125, now seen corresponding path program 4 times [2024-06-27 21:09:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445300474] [2024-06-27 21:09:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445300474] [2024-06-27 21:09:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445300474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:48,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:48,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:48,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047769589] [2024-06-27 21:09:48,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:48,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:48,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:48,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:48,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 288 transitions, 3364 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:48,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:48,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:48,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:50,600 INFO L124 PetriNetUnfolderBase]: 5649/8795 cut-off events. [2024-06-27 21:09:50,600 INFO L125 PetriNetUnfolderBase]: For 778315/778320 co-relation queries the response was YES. [2024-06-27 21:09:50,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58415 conditions, 8795 events. 5649/8795 cut-off events. For 778315/778320 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 53404 event pairs, 2046 based on Foata normal form. 18/8809 useless extension candidates. Maximal degree in co-relation 58298. Up to 8284 conditions per place. [2024-06-27 21:09:50,668 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 78 changer transitions 0/319 dead transitions. [2024-06-27 21:09:50,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 319 transitions, 4152 flow [2024-06-27 21:09:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:09:50,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 21:09:50,669 INFO L175 Difference]: Start difference. First operand has 250 places, 288 transitions, 3364 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:09:50,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 319 transitions, 4152 flow [2024-06-27 21:09:51,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 319 transitions, 3852 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 21:09:51,727 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 3286 flow [2024-06-27 21:09:51,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3064, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3286, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-27 21:09:51,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-27 21:09:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 3286 flow [2024-06-27 21:09:51,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:51,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:51,728 INFO 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 21:09:51,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:09:51,728 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 21:09:51,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1217494658, now seen corresponding path program 3 times [2024-06-27 21:09:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:51,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238392535] [2024-06-27 21:09:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:54,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:54,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238392535] [2024-06-27 21:09:54,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238392535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:54,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:54,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270161000] [2024-06-27 21:09:54,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:54,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:54,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:54,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:09:54,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 3286 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:54,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:54,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:09:54,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:57,630 INFO L124 PetriNetUnfolderBase]: 5753/8939 cut-off events. [2024-06-27 21:09:57,630 INFO L125 PetriNetUnfolderBase]: For 803539/803544 co-relation queries the response was YES. [2024-06-27 21:09:57,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59256 conditions, 8939 events. 5753/8939 cut-off events. For 803539/803544 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 54126 event pairs, 1964 based on Foata normal form. 12/8947 useless extension candidates. Maximal degree in co-relation 59138. Up to 7194 conditions per place. [2024-06-27 21:09:57,711 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 191 selfloop transitions, 153 changer transitions 0/347 dead transitions. [2024-06-27 21:09:57,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 347 transitions, 4452 flow [2024-06-27 21:09:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:09:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:09:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-06-27 21:09:57,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3714821763602251 [2024-06-27 21:09:57,713 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 3286 flow. Second operand 13 states and 198 transitions. [2024-06-27 21:09:57,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 347 transitions, 4452 flow [2024-06-27 21:09:59,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 347 transitions, 4250 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:59,255 INFO L231 Difference]: Finished difference. Result has 253 places, 296 transitions, 3454 flow [2024-06-27 21:09:59,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3454, PETRI_PLACES=253, PETRI_TRANSITIONS=296} [2024-06-27 21:09:59,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 21:09:59,256 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 296 transitions, 3454 flow [2024-06-27 21:09:59,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:09:59,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:59,256 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, 1] [2024-06-27 21:09:59,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:09:59,257 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 21:09:59,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1204156009, now seen corresponding path program 5 times [2024-06-27 21:09:59,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:59,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626578789] [2024-06-27 21:09:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:59,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:02,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:02,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626578789] [2024-06-27 21:10:02,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626578789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:02,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:02,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:02,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381329479] [2024-06-27 21:10:02,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:02,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:02,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:02,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:02,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:02,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:02,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 296 transitions, 3454 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:02,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:02,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:02,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:05,316 INFO L124 PetriNetUnfolderBase]: 5877/9127 cut-off events. [2024-06-27 21:10:05,316 INFO L125 PetriNetUnfolderBase]: For 876528/876533 co-relation queries the response was YES. [2024-06-27 21:10:05,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62177 conditions, 9127 events. 5877/9127 cut-off events. For 876528/876533 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 55663 event pairs, 2074 based on Foata normal form. 18/9141 useless extension candidates. Maximal degree in co-relation 62058. Up to 8324 conditions per place. [2024-06-27 21:10:05,403 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 246 selfloop transitions, 84 changer transitions 0/333 dead transitions. [2024-06-27 21:10:05,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 333 transitions, 4478 flow [2024-06-27 21:10:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:10:05,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:10:05,404 INFO L175 Difference]: Start difference. First operand has 253 places, 296 transitions, 3454 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:10:05,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 333 transitions, 4478 flow [2024-06-27 21:10:06,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 333 transitions, 4219 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 21:10:06,845 INFO L231 Difference]: Finished difference. Result has 252 places, 299 transitions, 3460 flow [2024-06-27 21:10:06,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3460, PETRI_PLACES=252, PETRI_TRANSITIONS=299} [2024-06-27 21:10:06,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 21:10:06,846 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 299 transitions, 3460 flow [2024-06-27 21:10:06,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:06,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:06,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:06,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:10:06,846 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 21:10:06,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1217500238, now seen corresponding path program 4 times [2024-06-27 21:10:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:06,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154517111] [2024-06-27 21:10:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:06,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:10,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:10,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154517111] [2024-06-27 21:10:10,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154517111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:10,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:10,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:10,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359139534] [2024-06-27 21:10:10,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:10,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:10,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:10,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:10,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 299 transitions, 3460 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:10,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:10,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:13,160 INFO L124 PetriNetUnfolderBase]: 5853/9095 cut-off events. [2024-06-27 21:10:13,161 INFO L125 PetriNetUnfolderBase]: For 863306/863311 co-relation queries the response was YES. [2024-06-27 21:10:13,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61372 conditions, 9095 events. 5853/9095 cut-off events. For 863306/863311 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 55343 event pairs, 1994 based on Foata normal form. 12/9103 useless extension candidates. Maximal degree in co-relation 61252. Up to 7370 conditions per place. [2024-06-27 21:10:13,244 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 153 changer transitions 0/349 dead transitions. [2024-06-27 21:10:13,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 349 transitions, 4432 flow [2024-06-27 21:10:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:10:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:10:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-06-27 21:10:13,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696060037523452 [2024-06-27 21:10:13,246 INFO L175 Difference]: Start difference. First operand has 252 places, 299 transitions, 3460 flow. Second operand 13 states and 197 transitions. [2024-06-27 21:10:13,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 349 transitions, 4432 flow [2024-06-27 21:10:14,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 349 transitions, 4282 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:14,805 INFO L231 Difference]: Finished difference. Result has 261 places, 299 transitions, 3622 flow [2024-06-27 21:10:14,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3622, PETRI_PLACES=261, PETRI_TRANSITIONS=299} [2024-06-27 21:10:14,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 21:10:14,806 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 299 transitions, 3622 flow [2024-06-27 21:10:14,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:14,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:14,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:14,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:10:14,806 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 21:10:14,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2011492299, now seen corresponding path program 6 times [2024-06-27 21:10:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:14,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921366700] [2024-06-27 21:10:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:14,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:17,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921366700] [2024-06-27 21:10:17,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921366700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:17,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:17,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:17,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723486125] [2024-06-27 21:10:17,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:17,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:17,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:18,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:18,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 299 transitions, 3622 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:18,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:18,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:18,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:20,548 INFO L124 PetriNetUnfolderBase]: 5861/9111 cut-off events. [2024-06-27 21:10:20,548 INFO L125 PetriNetUnfolderBase]: For 870992/871013 co-relation queries the response was YES. [2024-06-27 21:10:20,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62454 conditions, 9111 events. 5861/9111 cut-off events. For 870992/871013 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 55626 event pairs, 2144 based on Foata normal form. 12/9118 useless extension candidates. Maximal degree in co-relation 62332. Up to 8648 conditions per place. [2024-06-27 21:10:20,627 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 78 changer transitions 0/322 dead transitions. [2024-06-27 21:10:20,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 322 transitions, 4382 flow [2024-06-27 21:10:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 21:10:20,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-27 21:10:20,629 INFO L175 Difference]: Start difference. First operand has 261 places, 299 transitions, 3622 flow. Second operand 8 states and 119 transitions. [2024-06-27 21:10:20,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 322 transitions, 4382 flow [2024-06-27 21:10:21,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 322 transitions, 4076 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 21:10:21,986 INFO L231 Difference]: Finished difference. Result has 257 places, 301 transitions, 3545 flow [2024-06-27 21:10:21,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3545, PETRI_PLACES=257, PETRI_TRANSITIONS=301} [2024-06-27 21:10:21,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-27 21:10:21,987 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 301 transitions, 3545 flow [2024-06-27 21:10:21,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:21,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:21,987 INFO 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 21:10:21,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:10:21,987 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 21:10:21,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1806881605, now seen corresponding path program 7 times [2024-06-27 21:10:21,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:21,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125227030] [2024-06-27 21:10:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:25,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:25,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125227030] [2024-06-27 21:10:25,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125227030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:25,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:25,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:25,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237106284] [2024-06-27 21:10:25,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:25,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:25,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:25,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:25,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:25,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:25,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 301 transitions, 3545 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:25,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:25,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:25,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:27,570 INFO L124 PetriNetUnfolderBase]: 5882/9142 cut-off events. [2024-06-27 21:10:27,570 INFO L125 PetriNetUnfolderBase]: For 899504/899525 co-relation queries the response was YES. [2024-06-27 21:10:27,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62661 conditions, 9142 events. 5882/9142 cut-off events. For 899504/899525 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55859 event pairs, 2139 based on Foata normal form. 12/9149 useless extension candidates. Maximal degree in co-relation 62538. Up to 8598 conditions per place. [2024-06-27 21:10:27,658 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 85 changer transitions 0/332 dead transitions. [2024-06-27 21:10:27,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 332 transitions, 4581 flow [2024-06-27 21:10:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:10:27,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 21:10:27,660 INFO L175 Difference]: Start difference. First operand has 257 places, 301 transitions, 3545 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:10:27,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 332 transitions, 4581 flow [2024-06-27 21:10:29,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 332 transitions, 4368 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:29,453 INFO L231 Difference]: Finished difference. Result has 259 places, 305 transitions, 3647 flow [2024-06-27 21:10:29,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3647, PETRI_PLACES=259, PETRI_TRANSITIONS=305} [2024-06-27 21:10:29,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 21:10:29,454 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 305 transitions, 3647 flow [2024-06-27 21:10:29,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:29,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:29,454 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 21:10:29,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:10:29,454 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 21:10:29,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:29,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1317745706, now seen corresponding path program 5 times [2024-06-27 21:10:29,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:29,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514339062] [2024-06-27 21:10:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:29,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514339062] [2024-06-27 21:10:32,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514339062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:32,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:32,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51314659] [2024-06-27 21:10:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:32,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:32,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:32,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:32,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 305 transitions, 3647 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:32,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:32,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:32,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:35,324 INFO L124 PetriNetUnfolderBase]: 5858/9113 cut-off events. [2024-06-27 21:10:35,324 INFO L125 PetriNetUnfolderBase]: For 915651/915669 co-relation queries the response was YES. [2024-06-27 21:10:35,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62243 conditions, 9113 events. 5858/9113 cut-off events. For 915651/915669 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 55583 event pairs, 1929 based on Foata normal form. 10/9116 useless extension candidates. Maximal degree in co-relation 62119. Up to 7043 conditions per place. [2024-06-27 21:10:35,406 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 176 selfloop transitions, 163 changer transitions 0/342 dead transitions. [2024-06-27 21:10:35,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 342 transitions, 4573 flow [2024-06-27 21:10:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:10:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:10:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-27 21:10:35,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36807095343680707 [2024-06-27 21:10:35,407 INFO L175 Difference]: Start difference. First operand has 259 places, 305 transitions, 3647 flow. Second operand 11 states and 166 transitions. [2024-06-27 21:10:35,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 342 transitions, 4573 flow [2024-06-27 21:10:36,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 342 transitions, 4348 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:36,631 INFO L231 Difference]: Finished difference. Result has 265 places, 305 transitions, 3754 flow [2024-06-27 21:10:36,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3754, PETRI_PLACES=265, PETRI_TRANSITIONS=305} [2024-06-27 21:10:36,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 21:10:36,632 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 305 transitions, 3754 flow [2024-06-27 21:10:36,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:36,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:36,632 INFO 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 21:10:36,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:10:36,632 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 21:10:36,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -105018053, now seen corresponding path program 8 times [2024-06-27 21:10:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:36,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339090882] [2024-06-27 21:10:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:40,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339090882] [2024-06-27 21:10:40,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339090882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:40,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:40,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806458905] [2024-06-27 21:10:40,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:40,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:40,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:40,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 305 transitions, 3754 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:40,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:40,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:40,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:42,896 INFO L124 PetriNetUnfolderBase]: 5853/9103 cut-off events. [2024-06-27 21:10:42,896 INFO L125 PetriNetUnfolderBase]: For 917044/917063 co-relation queries the response was YES. [2024-06-27 21:10:42,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63013 conditions, 9103 events. 5853/9103 cut-off events. For 917044/917063 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55695 event pairs, 2128 based on Foata normal form. 12/9110 useless extension candidates. Maximal degree in co-relation 62888. Up to 8640 conditions per place. [2024-06-27 21:10:42,973 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 242 selfloop transitions, 80 changer transitions 0/325 dead transitions. [2024-06-27 21:10:42,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 325 transitions, 4454 flow [2024-06-27 21:10:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-27 21:10:42,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-27 21:10:42,974 INFO L175 Difference]: Start difference. First operand has 265 places, 305 transitions, 3754 flow. Second operand 8 states and 118 transitions. [2024-06-27 21:10:42,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 325 transitions, 4454 flow [2024-06-27 21:10:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 325 transitions, 3967 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-27 21:10:44,421 INFO L231 Difference]: Finished difference. Result has 263 places, 305 transitions, 3432 flow [2024-06-27 21:10:44,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3267, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3432, PETRI_PLACES=263, PETRI_TRANSITIONS=305} [2024-06-27 21:10:44,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 21:10:44,422 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 305 transitions, 3432 flow [2024-06-27 21:10:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:44,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:10:44,422 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 21:10:44,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:44,423 INFO L85 PathProgramCache]: Analyzing trace with hash -318627090, now seen corresponding path program 6 times [2024-06-27 21:10:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:44,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969399907] [2024-06-27 21:10:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969399907] [2024-06-27 21:10:47,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969399907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:47,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:47,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:47,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088662704] [2024-06-27 21:10:47,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:47,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:47,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:47,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:47,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:47,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 305 transitions, 3432 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:47,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:47,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:47,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:50,175 INFO L124 PetriNetUnfolderBase]: 5957/9247 cut-off events. [2024-06-27 21:10:50,175 INFO L125 PetriNetUnfolderBase]: For 975693/975712 co-relation queries the response was YES. [2024-06-27 21:10:50,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63365 conditions, 9247 events. 5957/9247 cut-off events. For 975693/975712 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 56491 event pairs, 2142 based on Foata normal form. 18/9260 useless extension candidates. Maximal degree in co-relation 63240. Up to 8674 conditions per place. [2024-06-27 21:10:50,265 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 85 changer transitions 0/347 dead transitions. [2024-06-27 21:10:50,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 347 transitions, 4418 flow [2024-06-27 21:10:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:10:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:10:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 170 transitions. [2024-06-27 21:10:50,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34552845528455284 [2024-06-27 21:10:50,266 INFO L175 Difference]: Start difference. First operand has 263 places, 305 transitions, 3432 flow. Second operand 12 states and 170 transitions. [2024-06-27 21:10:50,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 347 transitions, 4418 flow [2024-06-27 21:10:51,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 347 transitions, 4234 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:51,850 INFO L231 Difference]: Finished difference. Result has 268 places, 311 transitions, 3476 flow [2024-06-27 21:10:51,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3476, PETRI_PLACES=268, PETRI_TRANSITIONS=311} [2024-06-27 21:10:51,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 21:10:51,851 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 311 transitions, 3476 flow [2024-06-27 21:10:51,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:51,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:51,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:51,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:10:51,851 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 21:10:51,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1314026636, now seen corresponding path program 7 times [2024-06-27 21:10:51,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:51,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719096562] [2024-06-27 21:10:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:51,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:54,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:54,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719096562] [2024-06-27 21:10:54,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719096562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:54,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:54,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207202724] [2024-06-27 21:10:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:54,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:54,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:54,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:54,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:10:54,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 311 transitions, 3476 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:54,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:54,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:10:54,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:57,745 INFO L124 PetriNetUnfolderBase]: 5933/9215 cut-off events. [2024-06-27 21:10:57,745 INFO L125 PetriNetUnfolderBase]: For 974843/974862 co-relation queries the response was YES. [2024-06-27 21:10:57,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63006 conditions, 9215 events. 5933/9215 cut-off events. For 974843/974862 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 56217 event pairs, 2142 based on Foata normal form. 18/9228 useless extension candidates. Maximal degree in co-relation 62880. Up to 8662 conditions per place. [2024-06-27 21:10:57,821 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 85 changer transitions 0/343 dead transitions. [2024-06-27 21:10:57,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 343 transitions, 4242 flow [2024-06-27 21:10:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:10:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:10:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-27 21:10:57,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35033259423503327 [2024-06-27 21:10:57,822 INFO L175 Difference]: Start difference. First operand has 268 places, 311 transitions, 3476 flow. Second operand 11 states and 158 transitions. [2024-06-27 21:10:57,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 343 transitions, 4242 flow [2024-06-27 21:10:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 343 transitions, 4140 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:59,377 INFO L231 Difference]: Finished difference. Result has 271 places, 311 transitions, 3550 flow [2024-06-27 21:10:59,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3550, PETRI_PLACES=271, PETRI_TRANSITIONS=311} [2024-06-27 21:10:59,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 21:10:59,378 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 311 transitions, 3550 flow [2024-06-27 21:10:59,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:10:59,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:59,378 INFO 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 21:10:59,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:10:59,378 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 21:10:59,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1695056233, now seen corresponding path program 9 times [2024-06-27 21:10:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:59,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376892373] [2024-06-27 21:10:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:59,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:03,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376892373] [2024-06-27 21:11:03,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376892373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:03,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:03,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:03,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803596969] [2024-06-27 21:11:03,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:03,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:03,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:03,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:11:03,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 311 transitions, 3550 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:03,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:03,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:11:03,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:05,519 INFO L124 PetriNetUnfolderBase]: 5941/9227 cut-off events. [2024-06-27 21:11:05,519 INFO L125 PetriNetUnfolderBase]: For 980464/980483 co-relation queries the response was YES. [2024-06-27 21:11:05,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63840 conditions, 9227 events. 5941/9227 cut-off events. For 980464/980483 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 56384 event pairs, 2146 based on Foata normal form. 12/9234 useless extension candidates. Maximal degree in co-relation 63712. Up to 8736 conditions per place. [2024-06-27 21:11:05,592 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 243 selfloop transitions, 87 changer transitions 0/333 dead transitions. [2024-06-27 21:11:05,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 333 transitions, 4334 flow [2024-06-27 21:11:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-27 21:11:05,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-27 21:11:05,593 INFO L175 Difference]: Start difference. First operand has 271 places, 311 transitions, 3550 flow. Second operand 8 states and 118 transitions. [2024-06-27 21:11:05,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 333 transitions, 4334 flow [2024-06-27 21:11:07,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 333 transitions, 4164 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 21:11:07,197 INFO L231 Difference]: Finished difference. Result has 269 places, 313 transitions, 3633 flow [2024-06-27 21:11:07,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3633, PETRI_PLACES=269, PETRI_TRANSITIONS=313} [2024-06-27 21:11:07,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 21:11:07,197 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 313 transitions, 3633 flow [2024-06-27 21:11:07,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:07,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:07,198 INFO 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 21:11:07,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:11:07,198 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 21:11:07,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1373071015, now seen corresponding path program 10 times [2024-06-27 21:11:07,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:07,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524331914] [2024-06-27 21:11:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:11,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:11,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524331914] [2024-06-27 21:11:11,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524331914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:11,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:11,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:11,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227235002] [2024-06-27 21:11:11,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:11,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:11,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:11,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:11,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:11:11,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 313 transitions, 3633 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:11,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:11,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:11:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:14,540 INFO L124 PetriNetUnfolderBase]: 5949/9239 cut-off events. [2024-06-27 21:11:14,540 INFO L125 PetriNetUnfolderBase]: For 1006400/1006419 co-relation queries the response was YES. [2024-06-27 21:11:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64359 conditions, 9239 events. 5949/9239 cut-off events. For 1006400/1006419 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 56539 event pairs, 2069 based on Foata normal form. 12/9246 useless extension candidates. Maximal degree in co-relation 64230. Up to 8327 conditions per place. [2024-06-27 21:11:14,615 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 106 changer transitions 0/344 dead transitions. [2024-06-27 21:11:14,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 344 transitions, 4877 flow [2024-06-27 21:11:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:11:14,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 21:11:14,617 INFO L175 Difference]: Start difference. First operand has 269 places, 313 transitions, 3633 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:11:14,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 344 transitions, 4877 flow [2024-06-27 21:11:16,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 344 transitions, 4640 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:16,361 INFO L231 Difference]: Finished difference. Result has 271 places, 317 transitions, 3765 flow [2024-06-27 21:11:16,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3765, PETRI_PLACES=271, PETRI_TRANSITIONS=317} [2024-06-27 21:11:16,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 21:11:16,362 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 317 transitions, 3765 flow [2024-06-27 21:11:16,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:16,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:16,362 INFO 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 21:11:16,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:11:16,362 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 21:11:16,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1378784935, now seen corresponding path program 11 times [2024-06-27 21:11:16,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:16,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299577476] [2024-06-27 21:11:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:19,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:19,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299577476] [2024-06-27 21:11:19,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299577476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:19,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:19,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:19,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175209678] [2024-06-27 21:11:19,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:19,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:19,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:19,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:11:19,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 317 transitions, 3765 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:19,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:19,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:11:19,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:21,925 INFO L124 PetriNetUnfolderBase]: 5944/9232 cut-off events. [2024-06-27 21:11:21,925 INFO L125 PetriNetUnfolderBase]: For 1024165/1024184 co-relation queries the response was YES. [2024-06-27 21:11:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64542 conditions, 9232 events. 5944/9232 cut-off events. For 1024165/1024184 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 56475 event pairs, 2049 based on Foata normal form. 12/9239 useless extension candidates. Maximal degree in co-relation 64412. Up to 8323 conditions per place. [2024-06-27 21:11:22,017 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 106 changer transitions 0/348 dead transitions. [2024-06-27 21:11:22,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 348 transitions, 4741 flow [2024-06-27 21:11:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:11:22,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 21:11:22,018 INFO L175 Difference]: Start difference. First operand has 271 places, 317 transitions, 3765 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:11:22,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 348 transitions, 4741 flow [2024-06-27 21:11:24,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 348 transitions, 4418 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:24,066 INFO L231 Difference]: Finished difference. Result has 274 places, 317 transitions, 3659 flow [2024-06-27 21:11:24,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3659, PETRI_PLACES=274, PETRI_TRANSITIONS=317} [2024-06-27 21:11:24,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 21:11:24,067 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 317 transitions, 3659 flow [2024-06-27 21:11:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:24,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:24,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:24,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:11:24,068 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 21:11:24,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -117916812, now seen corresponding path program 8 times [2024-06-27 21:11:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:24,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099192749] [2024-06-27 21:11:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:24,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099192749] [2024-06-27 21:11:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099192749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:27,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:27,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:27,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387961815] [2024-06-27 21:11:27,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:27,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:27,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:27,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:27,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:27,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:11:27,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 317 transitions, 3659 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:27,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:27,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:11:27,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:30,390 INFO L124 PetriNetUnfolderBase]: 5984/9288 cut-off events. [2024-06-27 21:11:30,390 INFO L125 PetriNetUnfolderBase]: For 1065653/1065672 co-relation queries the response was YES. [2024-06-27 21:11:30,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64805 conditions, 9288 events. 5984/9288 cut-off events. For 1065653/1065672 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 56790 event pairs, 2141 based on Foata normal form. 18/9301 useless extension candidates. Maximal degree in co-relation 64674. Up to 8667 conditions per place. [2024-06-27 21:11:30,463 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 94 changer transitions 0/356 dead transitions. [2024-06-27 21:11:30,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 356 transitions, 4658 flow [2024-06-27 21:11:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:11:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:11:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2024-06-27 21:11:30,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475609756097561 [2024-06-27 21:11:30,464 INFO L175 Difference]: Start difference. First operand has 274 places, 317 transitions, 3659 flow. Second operand 12 states and 171 transitions. [2024-06-27 21:11:30,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 356 transitions, 4658 flow [2024-06-27 21:11:32,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 356 transitions, 4367 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:11:32,309 INFO L231 Difference]: Finished difference. Result has 278 places, 320 transitions, 3591 flow [2024-06-27 21:11:32,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3591, PETRI_PLACES=278, PETRI_TRANSITIONS=320} [2024-06-27 21:11:32,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 21:11:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 320 transitions, 3591 flow [2024-06-27 21:11:32,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:32,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:32,309 INFO 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 21:11:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:11:32,310 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 21:11:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -377648800, now seen corresponding path program 9 times [2024-06-27 21:11:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:32,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765218843] [2024-06-27 21:11:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:35,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:35,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765218843] [2024-06-27 21:11:35,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765218843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:35,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:35,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670431823] [2024-06-27 21:11:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:35,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:11:35,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 320 transitions, 3591 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:35,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:35,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:11:35,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:38,387 INFO L124 PetriNetUnfolderBase]: 5960/9256 cut-off events. [2024-06-27 21:11:38,387 INFO L125 PetriNetUnfolderBase]: For 1061890/1061909 co-relation queries the response was YES. [2024-06-27 21:11:38,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63795 conditions, 9256 events. 5960/9256 cut-off events. For 1061890/1061909 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 56642 event pairs, 2137 based on Foata normal form. 18/9269 useless extension candidates. Maximal degree in co-relation 63664. Up to 8655 conditions per place. [2024-06-27 21:11:38,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 94 changer transitions 0/355 dead transitions. [2024-06-27 21:11:38,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 355 transitions, 4391 flow [2024-06-27 21:11:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:11:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:11:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 170 transitions. [2024-06-27 21:11:38,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34552845528455284 [2024-06-27 21:11:38,478 INFO L175 Difference]: Start difference. First operand has 278 places, 320 transitions, 3591 flow. Second operand 12 states and 170 transitions. [2024-06-27 21:11:38,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 355 transitions, 4391 flow [2024-06-27 21:11:40,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 355 transitions, 4045 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 21:11:40,478 INFO L231 Difference]: Finished difference. Result has 278 places, 320 transitions, 3439 flow [2024-06-27 21:11:40,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3439, PETRI_PLACES=278, PETRI_TRANSITIONS=320} [2024-06-27 21:11:40,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 21:11:40,478 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 320 transitions, 3439 flow [2024-06-27 21:11:40,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 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 21:11:40,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:40,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:40,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:11:40,479 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 21:11:40,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:40,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1248532046, now seen corresponding path program 1 times [2024-06-27 21:11:40,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919441632] [2024-06-27 21:11:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:40,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919441632] [2024-06-27 21:11:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919441632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:44,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:44,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:44,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005115507] [2024-06-27 21:11:44,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:44,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:11:44,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 320 transitions, 3439 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:11:44,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:44,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:11:44,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:46,873 INFO L124 PetriNetUnfolderBase]: 5924/9197 cut-off events. [2024-06-27 21:11:46,873 INFO L125 PetriNetUnfolderBase]: For 1084231/1084254 co-relation queries the response was YES. [2024-06-27 21:11:46,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60738 conditions, 9197 events. 5924/9197 cut-off events. For 1084231/1084254 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 55891 event pairs, 1424 based on Foata normal form. 60/9253 useless extension candidates. Maximal degree in co-relation 60607. Up to 3497 conditions per place. [2024-06-27 21:11:46,959 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 120 changer transitions 17/394 dead transitions. [2024-06-27 21:11:46,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 394 transitions, 4853 flow [2024-06-27 21:11:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:11:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:11:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 21:11:46,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:11:46,961 INFO L175 Difference]: Start difference. First operand has 278 places, 320 transitions, 3439 flow. Second operand 10 states and 186 transitions. [2024-06-27 21:11:46,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 394 transitions, 4853 flow [2024-06-27 21:11:48,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 394 transitions, 4665 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:11:48,785 INFO L231 Difference]: Finished difference. Result has 277 places, 316 transitions, 3463 flow [2024-06-27 21:11:48,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3463, PETRI_PLACES=277, PETRI_TRANSITIONS=316} [2024-06-27 21:11:48,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-27 21:11:48,785 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 316 transitions, 3463 flow [2024-06-27 21:11:48,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:11:48,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:48,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:48,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:11:48,786 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 21:11:48,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1242818126, now seen corresponding path program 2 times [2024-06-27 21:11:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:48,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931730281] [2024-06-27 21:11:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:52,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931730281] [2024-06-27 21:11:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931730281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:52,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:11:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419612309] [2024-06-27 21:11:52,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:52,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:11:52,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:11:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:11:52,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:11:52,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 316 transitions, 3463 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:11:52,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:52,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:11:52,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:54,929 INFO L124 PetriNetUnfolderBase]: 6324/9809 cut-off events. [2024-06-27 21:11:54,929 INFO L125 PetriNetUnfolderBase]: For 1410884/1410907 co-relation queries the response was YES. [2024-06-27 21:11:54,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73265 conditions, 9809 events. 6324/9809 cut-off events. For 1410884/1410907 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 60083 event pairs, 1408 based on Foata normal form. 28/9833 useless extension candidates. Maximal degree in co-relation 73133. Up to 3788 conditions per place. [2024-06-27 21:11:55,027 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 125 changer transitions 13/385 dead transitions. [2024-06-27 21:11:55,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 385 transitions, 4861 flow [2024-06-27 21:11:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:11:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:11:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:11:55,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 21:11:55,029 INFO L175 Difference]: Start difference. First operand has 277 places, 316 transitions, 3463 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:11:55,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 385 transitions, 4861 flow [2024-06-27 21:11:56,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 385 transitions, 4604 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 21:11:56,614 INFO L231 Difference]: Finished difference. Result has 277 places, 315 transitions, 3485 flow [2024-06-27 21:11:56,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3485, PETRI_PLACES=277, PETRI_TRANSITIONS=315} [2024-06-27 21:11:56,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-27 21:11:56,615 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 315 transitions, 3485 flow [2024-06-27 21:11:56,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:11:56,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:56,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:56,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:11:56,615 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 21:11:56,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1190439596, now seen corresponding path program 3 times [2024-06-27 21:11:56,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:56,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989652154] [2024-06-27 21:11:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:56,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:00,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:00,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989652154] [2024-06-27 21:12:00,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989652154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:00,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:00,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:00,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83535750] [2024-06-27 21:12:00,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:00,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:00,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:00,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:00,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:00,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:00,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 315 transitions, 3485 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:00,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:00,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:00,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:03,522 INFO L124 PetriNetUnfolderBase]: 6128/9505 cut-off events. [2024-06-27 21:12:03,522 INFO L125 PetriNetUnfolderBase]: For 1351229/1351252 co-relation queries the response was YES. [2024-06-27 21:12:03,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67241 conditions, 9505 events. 6128/9505 cut-off events. For 1351229/1351252 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 57959 event pairs, 1686 based on Foata normal form. 76/9577 useless extension candidates. Maximal degree in co-relation 67109. Up to 6427 conditions per place. [2024-06-27 21:12:03,600 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 116 changer transitions 22/385 dead transitions. [2024-06-27 21:12:03,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 385 transitions, 4671 flow [2024-06-27 21:12:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:12:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:12:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 21:12:03,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279379157427938 [2024-06-27 21:12:03,602 INFO L175 Difference]: Start difference. First operand has 277 places, 315 transitions, 3485 flow. Second operand 11 states and 193 transitions. [2024-06-27 21:12:03,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 385 transitions, 4671 flow [2024-06-27 21:12:05,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 385 transitions, 4412 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 21:12:05,290 INFO L231 Difference]: Finished difference. Result has 275 places, 307 transitions, 3382 flow [2024-06-27 21:12:05,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3382, PETRI_PLACES=275, PETRI_TRANSITIONS=307} [2024-06-27 21:12:05,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-27 21:12:05,291 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 307 transitions, 3382 flow [2024-06-27 21:12:05,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:05,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:05,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:12:05,292 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:05,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1386423004, now seen corresponding path program 4 times [2024-06-27 21:12:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339504253] [2024-06-27 21:12:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:05,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:09,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:09,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339504253] [2024-06-27 21:12:09,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339504253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:09,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:09,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221634147] [2024-06-27 21:12:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:09,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:09,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:09,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:09,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 307 transitions, 3382 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:09,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:09,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:09,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:12,032 INFO L124 PetriNetUnfolderBase]: 5646/8747 cut-off events. [2024-06-27 21:12:12,032 INFO L125 PetriNetUnfolderBase]: For 1137099/1137122 co-relation queries the response was YES. [2024-06-27 21:12:12,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59189 conditions, 8747 events. 5646/8747 cut-off events. For 1137099/1137122 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52445 event pairs, 1608 based on Foata normal form. 88/8831 useless extension candidates. Maximal degree in co-relation 59059. Up to 6923 conditions per place. [2024-06-27 21:12:12,116 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 110 changer transitions 33/367 dead transitions. [2024-06-27 21:12:12,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 367 transitions, 4316 flow [2024-06-27 21:12:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:12:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:12:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 21:12:12,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401330376940133 [2024-06-27 21:12:12,117 INFO L175 Difference]: Start difference. First operand has 275 places, 307 transitions, 3382 flow. Second operand 11 states and 181 transitions. [2024-06-27 21:12:12,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 367 transitions, 4316 flow [2024-06-27 21:12:13,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 367 transitions, 4077 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 21:12:13,220 INFO L231 Difference]: Finished difference. Result has 272 places, 300 transitions, 3309 flow [2024-06-27 21:12:13,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3309, PETRI_PLACES=272, PETRI_TRANSITIONS=300} [2024-06-27 21:12:13,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 21:12:13,221 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 300 transitions, 3309 flow [2024-06-27 21:12:13,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:13,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:13,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:13,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:12:13,221 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:13,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash -941920220, now seen corresponding path program 5 times [2024-06-27 21:12:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:13,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198761686] [2024-06-27 21:12:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:16,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:16,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198761686] [2024-06-27 21:12:16,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198761686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:16,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:16,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:16,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837114] [2024-06-27 21:12:16,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:16,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:16,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:16,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:16,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 300 transitions, 3309 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:16,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:16,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:16,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:19,516 INFO L124 PetriNetUnfolderBase]: 5350/8279 cut-off events. [2024-06-27 21:12:19,516 INFO L125 PetriNetUnfolderBase]: For 898380/898401 co-relation queries the response was YES. [2024-06-27 21:12:19,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56905 conditions, 8279 events. 5350/8279 cut-off events. For 898380/898401 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49174 event pairs, 1552 based on Foata normal form. 31/8306 useless extension candidates. Maximal degree in co-relation 56777. Up to 6915 conditions per place. [2024-06-27 21:12:19,590 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 110 changer transitions 14/346 dead transitions. [2024-06-27 21:12:19,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 346 transitions, 4153 flow [2024-06-27 21:12:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 21:12:19,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-27 21:12:19,592 INFO L175 Difference]: Start difference. First operand has 272 places, 300 transitions, 3309 flow. Second operand 10 states and 158 transitions. [2024-06-27 21:12:19,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 346 transitions, 4153 flow [2024-06-27 21:12:21,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 346 transitions, 3921 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 21:12:21,098 INFO L231 Difference]: Finished difference. Result has 265 places, 297 transitions, 3276 flow [2024-06-27 21:12:21,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3079, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3276, PETRI_PLACES=265, PETRI_TRANSITIONS=297} [2024-06-27 21:12:21,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 21:12:21,099 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 297 transitions, 3276 flow [2024-06-27 21:12:21,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:21,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:21,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:21,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:12:21,099 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 21:12:21,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:21,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1469372274, now seen corresponding path program 6 times [2024-06-27 21:12:21,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336504491] [2024-06-27 21:12:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:21,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336504491] [2024-06-27 21:12:24,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336504491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:24,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:24,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471298523] [2024-06-27 21:12:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:24,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:24,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 297 transitions, 3276 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:24,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:24,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:24,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:27,274 INFO L124 PetriNetUnfolderBase]: 5706/8831 cut-off events. [2024-06-27 21:12:27,274 INFO L125 PetriNetUnfolderBase]: For 1041899/1041920 co-relation queries the response was YES. [2024-06-27 21:12:27,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63444 conditions, 8831 events. 5706/8831 cut-off events. For 1041899/1041920 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 53081 event pairs, 1611 based on Foata normal form. 31/8858 useless extension candidates. Maximal degree in co-relation 63319. Up to 6747 conditions per place. [2024-06-27 21:12:27,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 106 changer transitions 18/352 dead transitions. [2024-06-27 21:12:27,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 352 transitions, 4350 flow [2024-06-27 21:12:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:12:27,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:12:27,362 INFO L175 Difference]: Start difference. First operand has 265 places, 297 transitions, 3276 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:12:27,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 352 transitions, 4350 flow [2024-06-27 21:12:28,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 352 transitions, 4120 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 21:12:28,781 INFO L231 Difference]: Finished difference. Result has 264 places, 292 transitions, 3238 flow [2024-06-27 21:12:28,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3238, PETRI_PLACES=264, PETRI_TRANSITIONS=292} [2024-06-27 21:12:28,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 21:12:28,781 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 292 transitions, 3238 flow [2024-06-27 21:12:28,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:28,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:28,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:28,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:12:28,782 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 21:12:28,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1239943124, now seen corresponding path program 7 times [2024-06-27 21:12:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309988072] [2024-06-27 21:12:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:32,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:32,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309988072] [2024-06-27 21:12:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309988072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147958288] [2024-06-27 21:12:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:32,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:32,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:32,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:32,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 292 transitions, 3238 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:32,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:35,250 INFO L124 PetriNetUnfolderBase]: 5458/8454 cut-off events. [2024-06-27 21:12:35,250 INFO L125 PetriNetUnfolderBase]: For 981654/981654 co-relation queries the response was YES. [2024-06-27 21:12:35,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57407 conditions, 8454 events. 5458/8454 cut-off events. For 981654/981654 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 50672 event pairs, 1613 based on Foata normal form. 56/8506 useless extension candidates. Maximal degree in co-relation 57282. Up to 4533 conditions per place. [2024-06-27 21:12:35,318 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 81 changer transitions 40/343 dead transitions. [2024-06-27 21:12:35,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 343 transitions, 4270 flow [2024-06-27 21:12:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:12:35,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:12:35,320 INFO L175 Difference]: Start difference. First operand has 264 places, 292 transitions, 3238 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:12:35,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 343 transitions, 4270 flow [2024-06-27 21:12:36,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 343 transitions, 4051 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 21:12:36,708 INFO L231 Difference]: Finished difference. Result has 260 places, 266 transitions, 2826 flow [2024-06-27 21:12:36,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2826, PETRI_PLACES=260, PETRI_TRANSITIONS=266} [2024-06-27 21:12:36,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-27 21:12:36,709 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 266 transitions, 2826 flow [2024-06-27 21:12:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:36,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:36,709 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, 1] [2024-06-27 21:12:36,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:12:36,710 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 21:12:36,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash 800165966, now seen corresponding path program 1 times [2024-06-27 21:12:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:36,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685660286] [2024-06-27 21:12:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:36,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:40,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685660286] [2024-06-27 21:12:40,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685660286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:40,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:40,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:40,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647013028] [2024-06-27 21:12:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:40,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:40,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:40,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:40,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:40,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:40,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 266 transitions, 2826 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:40,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:40,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:40,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:42,277 INFO L124 PetriNetUnfolderBase]: 4868/7588 cut-off events. [2024-06-27 21:12:42,277 INFO L125 PetriNetUnfolderBase]: For 820294/820294 co-relation queries the response was YES. [2024-06-27 21:12:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53315 conditions, 7588 events. 4868/7588 cut-off events. For 820294/820294 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45294 event pairs, 1691 based on Foata normal form. 8/7592 useless extension candidates. Maximal degree in co-relation 53192. Up to 6921 conditions per place. [2024-06-27 21:12:42,356 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 68 changer transitions 0/303 dead transitions. [2024-06-27 21:12:42,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 303 transitions, 3770 flow [2024-06-27 21:12:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:12:42,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-27 21:12:42,358 INFO L175 Difference]: Start difference. First operand has 260 places, 266 transitions, 2826 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:12:42,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 303 transitions, 3770 flow [2024-06-27 21:12:43,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 303 transitions, 3596 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-27 21:12:43,602 INFO L231 Difference]: Finished difference. Result has 251 places, 268 transitions, 2872 flow [2024-06-27 21:12:43,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2872, PETRI_PLACES=251, PETRI_TRANSITIONS=268} [2024-06-27 21:12:43,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 21:12:43,602 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 268 transitions, 2872 flow [2024-06-27 21:12:43,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:43,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:43,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:12:43,603 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 21:12:43,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash 960242128, now seen corresponding path program 8 times [2024-06-27 21:12:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:43,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208114664] [2024-06-27 21:12:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:43,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208114664] [2024-06-27 21:12:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208114664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:47,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875810768] [2024-06-27 21:12:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:47,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:47,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:47,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:47,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 268 transitions, 2872 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:47,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:47,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:47,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:50,040 INFO L124 PetriNetUnfolderBase]: 4720/7372 cut-off events. [2024-06-27 21:12:50,040 INFO L125 PetriNetUnfolderBase]: For 737668/737668 co-relation queries the response was YES. [2024-06-27 21:12:50,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46900 conditions, 7372 events. 4720/7372 cut-off events. For 737668/737668 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43780 event pairs, 1511 based on Foata normal form. 68/7436 useless extension candidates. Maximal degree in co-relation 46782. Up to 5711 conditions per place. [2024-06-27 21:12:50,090 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 63 changer transitions 45/308 dead transitions. [2024-06-27 21:12:50,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 308 transitions, 3620 flow [2024-06-27 21:12:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 21:12:50,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-27 21:12:50,091 INFO L175 Difference]: Start difference. First operand has 251 places, 268 transitions, 2872 flow. Second operand 10 states and 154 transitions. [2024-06-27 21:12:50,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 308 transitions, 3620 flow [2024-06-27 21:12:50,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 308 transitions, 3509 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:50,789 INFO L231 Difference]: Finished difference. Result has 255 places, 241 transitions, 2525 flow [2024-06-27 21:12:50,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2525, PETRI_PLACES=255, PETRI_TRANSITIONS=241} [2024-06-27 21:12:50,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-27 21:12:50,789 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 241 transitions, 2525 flow [2024-06-27 21:12:50,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:50,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:50,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:50,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:12:50,790 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 21:12:50,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:50,790 INFO L85 PathProgramCache]: Analyzing trace with hash -541114776, now seen corresponding path program 9 times [2024-06-27 21:12:50,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:50,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538653737] [2024-06-27 21:12:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:50,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:54,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:54,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538653737] [2024-06-27 21:12:54,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538653737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:54,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:54,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:12:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604722437] [2024-06-27 21:12:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:12:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:54,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:12:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:12:54,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:12:54,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 241 transitions, 2525 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:54,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:54,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:12:54,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:56,832 INFO L124 PetriNetUnfolderBase]: 3900/6078 cut-off events. [2024-06-27 21:12:56,832 INFO L125 PetriNetUnfolderBase]: For 586463/586463 co-relation queries the response was YES. [2024-06-27 21:12:56,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37325 conditions, 6078 events. 3900/6078 cut-off events. For 586463/586463 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35159 event pairs, 1305 based on Foata normal form. 68/6142 useless extension candidates. Maximal degree in co-relation 37206. Up to 5143 conditions per place. [2024-06-27 21:12:56,885 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 53 changer transitions 27/280 dead transitions. [2024-06-27 21:12:56,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 280 transitions, 3223 flow [2024-06-27 21:12:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:12:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:12:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-27 21:12:56,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35033259423503327 [2024-06-27 21:12:56,886 INFO L175 Difference]: Start difference. First operand has 255 places, 241 transitions, 2525 flow. Second operand 11 states and 158 transitions. [2024-06-27 21:12:56,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 280 transitions, 3223 flow [2024-06-27 21:12:57,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 280 transitions, 3059 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-27 21:12:57,391 INFO L231 Difference]: Finished difference. Result has 242 places, 229 transitions, 2316 flow [2024-06-27 21:12:57,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2316, PETRI_PLACES=242, PETRI_TRANSITIONS=229} [2024-06-27 21:12:57,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 21:12:57,392 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 229 transitions, 2316 flow [2024-06-27 21:12:57,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:12:57,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:57,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:57,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:12:57,392 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 21:12:57,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash -540745628, now seen corresponding path program 1 times [2024-06-27 21:12:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:57,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788642556] [2024-06-27 21:12:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:57,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:01,208 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 21:13:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:01,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788642556] [2024-06-27 21:13:01,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788642556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:01,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:01,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:01,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223932527] [2024-06-27 21:13:01,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:01,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:01,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:01,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:01,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 229 transitions, 2316 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:01,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:01,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:01,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:02,983 INFO L124 PetriNetUnfolderBase]: 3462/5424 cut-off events. [2024-06-27 21:13:02,983 INFO L125 PetriNetUnfolderBase]: For 365296/365296 co-relation queries the response was YES. [2024-06-27 21:13:03,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32760 conditions, 5424 events. 3462/5424 cut-off events. For 365296/365296 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31057 event pairs, 1133 based on Foata normal form. 8/5428 useless extension candidates. Maximal degree in co-relation 32648. Up to 4785 conditions per place. [2024-06-27 21:13:03,030 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 61 changer transitions 0/263 dead transitions. [2024-06-27 21:13:03,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 263 transitions, 2956 flow [2024-06-27 21:13:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:13:03,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-27 21:13:03,031 INFO L175 Difference]: Start difference. First operand has 242 places, 229 transitions, 2316 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:13:03,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 263 transitions, 2956 flow [2024-06-27 21:13:03,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 263 transitions, 2824 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 21:13:03,601 INFO L231 Difference]: Finished difference. Result has 237 places, 229 transitions, 2314 flow [2024-06-27 21:13:03,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2314, PETRI_PLACES=237, PETRI_TRANSITIONS=229} [2024-06-27 21:13:03,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 21:13:03,601 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 229 transitions, 2314 flow [2024-06-27 21:13:03,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:03,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:03,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:03,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:13:03,602 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:03,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -911989760, now seen corresponding path program 1 times [2024-06-27 21:13:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:03,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150375704] [2024-06-27 21:13:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:07,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:07,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150375704] [2024-06-27 21:13:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150375704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:07,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:07,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:07,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138515385] [2024-06-27 21:13:07,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:07,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:07,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:07,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:07,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 229 transitions, 2314 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:07,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:07,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:09,459 INFO L124 PetriNetUnfolderBase]: 3642/5716 cut-off events. [2024-06-27 21:13:09,460 INFO L125 PetriNetUnfolderBase]: For 463060/463060 co-relation queries the response was YES. [2024-06-27 21:13:09,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33791 conditions, 5716 events. 3642/5716 cut-off events. For 463060/463060 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33097 event pairs, 1253 based on Foata normal form. 56/5768 useless extension candidates. Maximal degree in co-relation 33680. Up to 4945 conditions per place. [2024-06-27 21:13:09,509 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 54 changer transitions 9/271 dead transitions. [2024-06-27 21:13:09,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 271 transitions, 3044 flow [2024-06-27 21:13:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:13:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:13:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-06-27 21:13:09,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35476718403547675 [2024-06-27 21:13:09,511 INFO L175 Difference]: Start difference. First operand has 237 places, 229 transitions, 2314 flow. Second operand 11 states and 160 transitions. [2024-06-27 21:13:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 271 transitions, 3044 flow [2024-06-27 21:13:09,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 271 transitions, 2888 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 21:13:09,959 INFO L231 Difference]: Finished difference. Result has 239 places, 226 transitions, 2252 flow [2024-06-27 21:13:09,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2252, PETRI_PLACES=239, PETRI_TRANSITIONS=226} [2024-06-27 21:13:09,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 21:13:09,960 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 226 transitions, 2252 flow [2024-06-27 21:13:09,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:09,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:09,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:09,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:13:09,960 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:09,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1805343476, now seen corresponding path program 10 times [2024-06-27 21:13:09,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:09,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307315924] [2024-06-27 21:13:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:09,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:13,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:13,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307315924] [2024-06-27 21:13:13,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307315924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:13,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:13,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:13,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734860299] [2024-06-27 21:13:13,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:13,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:13,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:13,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:13,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:13,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:13,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 226 transitions, 2252 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:13,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:13,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:13,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:15,003 INFO L124 PetriNetUnfolderBase]: 3318/5189 cut-off events. [2024-06-27 21:13:15,004 INFO L125 PetriNetUnfolderBase]: For 332300/332305 co-relation queries the response was YES. [2024-06-27 21:13:15,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30710 conditions, 5189 events. 3318/5189 cut-off events. For 332300/332305 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29291 event pairs, 1118 based on Foata normal form. 16/5201 useless extension candidates. Maximal degree in co-relation 30599. Up to 4813 conditions per place. [2024-06-27 21:13:15,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 44 changer transitions 14/253 dead transitions. [2024-06-27 21:13:15,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 253 transitions, 2846 flow [2024-06-27 21:13:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-27 21:13:15,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34417344173441733 [2024-06-27 21:13:15,050 INFO L175 Difference]: Start difference. First operand has 239 places, 226 transitions, 2252 flow. Second operand 9 states and 127 transitions. [2024-06-27 21:13:15,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 253 transitions, 2846 flow [2024-06-27 21:13:15,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 253 transitions, 2704 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:13:15,497 INFO L231 Difference]: Finished difference. Result has 238 places, 222 transitions, 2165 flow [2024-06-27 21:13:15,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2165, PETRI_PLACES=238, PETRI_TRANSITIONS=222} [2024-06-27 21:13:15,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 21:13:15,498 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 222 transitions, 2165 flow [2024-06-27 21:13:15,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:15,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:15,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:15,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:13:15,498 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:15,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 971386344, now seen corresponding path program 2 times [2024-06-27 21:13:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:15,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043253351] [2024-06-27 21:13:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:15,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:19,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043253351] [2024-06-27 21:13:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043253351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:19,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:19,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:19,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695162510] [2024-06-27 21:13:19,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:19,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:19,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:19,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 222 transitions, 2165 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:19,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:19,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:19,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:21,010 INFO L124 PetriNetUnfolderBase]: 3022/4705 cut-off events. [2024-06-27 21:13:21,010 INFO L125 PetriNetUnfolderBase]: For 314470/314475 co-relation queries the response was YES. [2024-06-27 21:13:21,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27936 conditions, 4705 events. 3022/4705 cut-off events. For 314470/314475 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25921 event pairs, 956 based on Foata normal form. 16/4717 useless extension candidates. Maximal degree in co-relation 27825. Up to 4361 conditions per place. [2024-06-27 21:13:21,044 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 40 changer transitions 17/248 dead transitions. [2024-06-27 21:13:21,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 248 transitions, 2747 flow [2024-06-27 21:13:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-27 21:13:21,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-27 21:13:21,046 INFO L175 Difference]: Start difference. First operand has 238 places, 222 transitions, 2165 flow. Second operand 9 states and 126 transitions. [2024-06-27 21:13:21,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 248 transitions, 2747 flow [2024-06-27 21:13:21,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 248 transitions, 2647 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 21:13:21,399 INFO L231 Difference]: Finished difference. Result has 230 places, 215 transitions, 2060 flow [2024-06-27 21:13:21,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=230, PETRI_TRANSITIONS=215} [2024-06-27 21:13:21,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 21:13:21,399 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 215 transitions, 2060 flow [2024-06-27 21:13:21,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:21,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:21,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:21,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:13:21,400 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 21:13:21,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash -775319852, now seen corresponding path program 11 times [2024-06-27 21:13:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:21,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718651864] [2024-06-27 21:13:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:24,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718651864] [2024-06-27 21:13:24,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718651864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:24,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:24,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:24,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159766314] [2024-06-27 21:13:24,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:24,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:24,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:24,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:24,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 215 transitions, 2060 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:24,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:24,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:24,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:26,247 INFO L124 PetriNetUnfolderBase]: 2714/4201 cut-off events. [2024-06-27 21:13:26,247 INFO L125 PetriNetUnfolderBase]: For 268708/268713 co-relation queries the response was YES. [2024-06-27 21:13:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24898 conditions, 4201 events. 2714/4201 cut-off events. For 268708/268713 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22510 event pairs, 722 based on Foata normal form. 16/4213 useless extension candidates. Maximal degree in co-relation 24791. Up to 3809 conditions per place. [2024-06-27 21:13:26,277 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 33 changer transitions 24/246 dead transitions. [2024-06-27 21:13:26,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 246 transitions, 2672 flow [2024-06-27 21:13:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-27 21:13:26,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-27 21:13:26,278 INFO L175 Difference]: Start difference. First operand has 230 places, 215 transitions, 2060 flow. Second operand 9 states and 129 transitions. [2024-06-27 21:13:26,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 246 transitions, 2672 flow [2024-06-27 21:13:26,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 246 transitions, 2582 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 21:13:26,588 INFO L231 Difference]: Finished difference. Result has 222 places, 208 transitions, 1964 flow [2024-06-27 21:13:26,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1964, PETRI_PLACES=222, PETRI_TRANSITIONS=208} [2024-06-27 21:13:26,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 21:13:26,589 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 208 transitions, 1964 flow [2024-06-27 21:13:26,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:26,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:26,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:26,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:13:26,590 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 21:13:26,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1923800118, now seen corresponding path program 3 times [2024-06-27 21:13:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:26,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932163888] [2024-06-27 21:13:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:26,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:30,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932163888] [2024-06-27 21:13:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932163888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:30,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:30,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:30,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024465824] [2024-06-27 21:13:30,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:30,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:30,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 208 transitions, 1964 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:30,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:30,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:31,525 INFO L124 PetriNetUnfolderBase]: 2482/3833 cut-off events. [2024-06-27 21:13:31,526 INFO L125 PetriNetUnfolderBase]: For 246318/246323 co-relation queries the response was YES. [2024-06-27 21:13:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23413 conditions, 3833 events. 2482/3833 cut-off events. For 246318/246323 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20172 event pairs, 634 based on Foata normal form. 12/3841 useless extension candidates. Maximal degree in co-relation 23309. Up to 3535 conditions per place. [2024-06-27 21:13:31,555 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 187 selfloop transitions, 42 changer transitions 0/232 dead transitions. [2024-06-27 21:13:31,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 232 transitions, 2522 flow [2024-06-27 21:13:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-27 21:13:31,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33062330623306235 [2024-06-27 21:13:31,556 INFO L175 Difference]: Start difference. First operand has 222 places, 208 transitions, 1964 flow. Second operand 9 states and 122 transitions. [2024-06-27 21:13:31,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 232 transitions, 2522 flow [2024-06-27 21:13:31,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 232 transitions, 2416 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-27 21:13:31,818 INFO L231 Difference]: Finished difference. Result has 212 places, 209 transitions, 1980 flow [2024-06-27 21:13:31,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=212, PETRI_TRANSITIONS=209} [2024-06-27 21:13:31,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 21:13:31,819 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 209 transitions, 1980 flow [2024-06-27 21:13:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:31,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:31,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:31,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:13:31,819 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 21:13:31,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:31,819 INFO L85 PathProgramCache]: Analyzing trace with hash -423921822, now seen corresponding path program 2 times [2024-06-27 21:13:31,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:31,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923800722] [2024-06-27 21:13:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:31,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:35,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:35,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923800722] [2024-06-27 21:13:35,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923800722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:35,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:35,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:35,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962703206] [2024-06-27 21:13:35,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:35,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:35,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:35,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:35,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:35,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 209 transitions, 1980 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:35,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:35,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:35,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:36,586 INFO L124 PetriNetUnfolderBase]: 2510/3877 cut-off events. [2024-06-27 21:13:36,586 INFO L125 PetriNetUnfolderBase]: For 226416/226421 co-relation queries the response was YES. [2024-06-27 21:13:36,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23146 conditions, 3877 events. 2510/3877 cut-off events. For 226416/226421 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20398 event pairs, 440 based on Foata normal form. 12/3885 useless extension candidates. Maximal degree in co-relation 23047. Up to 3259 conditions per place. [2024-06-27 21:13:36,615 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 52 changer transitions 0/240 dead transitions. [2024-06-27 21:13:36,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 240 transitions, 2592 flow [2024-06-27 21:13:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:13:36,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:13:36,617 INFO L175 Difference]: Start difference. First operand has 212 places, 209 transitions, 1980 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:13:36,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 240 transitions, 2592 flow [2024-06-27 21:13:36,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 240 transitions, 2486 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:36,853 INFO L231 Difference]: Finished difference. Result has 213 places, 210 transitions, 2022 flow [2024-06-27 21:13:36,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2022, PETRI_PLACES=213, PETRI_TRANSITIONS=210} [2024-06-27 21:13:36,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 21:13:36,854 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 210 transitions, 2022 flow [2024-06-27 21:13:36,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:36,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:36,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:13:36,854 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 21:13:36,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1207573794, now seen corresponding path program 4 times [2024-06-27 21:13:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628393891] [2024-06-27 21:13:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:40,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:40,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628393891] [2024-06-27 21:13:40,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628393891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:40,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:40,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:40,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390689588] [2024-06-27 21:13:40,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:40,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:40,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:40,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 210 transitions, 2022 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:40,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:40,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:40,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:41,806 INFO L124 PetriNetUnfolderBase]: 2538/3921 cut-off events. [2024-06-27 21:13:41,806 INFO L125 PetriNetUnfolderBase]: For 233031/233036 co-relation queries the response was YES. [2024-06-27 21:13:41,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23607 conditions, 3921 events. 2538/3921 cut-off events. For 233031/233036 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20727 event pairs, 534 based on Foata normal form. 12/3929 useless extension candidates. Maximal degree in co-relation 23507. Up to 3525 conditions per place. [2024-06-27 21:13:41,838 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 50 changer transitions 0/239 dead transitions. [2024-06-27 21:13:41,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 239 transitions, 2620 flow [2024-06-27 21:13:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-27 21:13:41,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-27 21:13:41,839 INFO L175 Difference]: Start difference. First operand has 213 places, 210 transitions, 2022 flow. Second operand 9 states and 129 transitions. [2024-06-27 21:13:41,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 239 transitions, 2620 flow [2024-06-27 21:13:42,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 239 transitions, 2484 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:42,084 INFO L231 Difference]: Finished difference. Result has 215 places, 211 transitions, 2022 flow [2024-06-27 21:13:42,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2022, PETRI_PLACES=215, PETRI_TRANSITIONS=211} [2024-06-27 21:13:42,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-27 21:13:42,084 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 211 transitions, 2022 flow [2024-06-27 21:13:42,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:42,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:42,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:42,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:13:42,085 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 21:13:42,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:42,085 INFO L85 PathProgramCache]: Analyzing trace with hash -423926658, now seen corresponding path program 5 times [2024-06-27 21:13:42,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052599145] [2024-06-27 21:13:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:42,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:45,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052599145] [2024-06-27 21:13:45,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052599145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:45,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:45,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:45,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068667363] [2024-06-27 21:13:45,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:45,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:45,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:45,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:45,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:45,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:45,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 211 transitions, 2022 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:45,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:45,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:45,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:46,655 INFO L124 PetriNetUnfolderBase]: 2566/3965 cut-off events. [2024-06-27 21:13:46,655 INFO L125 PetriNetUnfolderBase]: For 232687/232692 co-relation queries the response was YES. [2024-06-27 21:13:46,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23659 conditions, 3965 events. 2566/3965 cut-off events. For 232687/232692 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21042 event pairs, 530 based on Foata normal form. 12/3973 useless extension candidates. Maximal degree in co-relation 23559. Up to 3429 conditions per place. [2024-06-27 21:13:46,686 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 52 changer transitions 0/243 dead transitions. [2024-06-27 21:13:46,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 243 transitions, 2646 flow [2024-06-27 21:13:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-27 21:13:46,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501355013550134 [2024-06-27 21:13:46,688 INFO L175 Difference]: Start difference. First operand has 215 places, 211 transitions, 2022 flow. Second operand 9 states and 131 transitions. [2024-06-27 21:13:46,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 243 transitions, 2646 flow [2024-06-27 21:13:46,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 243 transitions, 2522 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:46,953 INFO L231 Difference]: Finished difference. Result has 217 places, 212 transitions, 2040 flow [2024-06-27 21:13:46,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2040, PETRI_PLACES=217, PETRI_TRANSITIONS=212} [2024-06-27 21:13:46,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 21:13:46,954 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 212 transitions, 2040 flow [2024-06-27 21:13:46,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:46,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:46,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:13:46,955 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 21:13:46,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1403547420, now seen corresponding path program 2 times [2024-06-27 21:13:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:46,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401184868] [2024-06-27 21:13:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:51,226 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 21:13:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:51,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401184868] [2024-06-27 21:13:51,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401184868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:51,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:51,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:51,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983241173] [2024-06-27 21:13:51,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:51,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:51,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:51,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:51,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 212 transitions, 2040 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:51,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:51,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:51,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:53,008 INFO L124 PetriNetUnfolderBase]: 2594/4008 cut-off events. [2024-06-27 21:13:53,008 INFO L125 PetriNetUnfolderBase]: For 242276/242276 co-relation queries the response was YES. [2024-06-27 21:13:53,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24067 conditions, 4008 events. 2594/4008 cut-off events. For 242276/242276 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21311 event pairs, 635 based on Foata normal form. 8/4012 useless extension candidates. Maximal degree in co-relation 23966. Up to 3479 conditions per place. [2024-06-27 21:13:53,040 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 193 selfloop transitions, 62 changer transitions 0/258 dead transitions. [2024-06-27 21:13:53,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 258 transitions, 2862 flow [2024-06-27 21:13:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:13:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:13:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 21:13:53,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-27 21:13:53,041 INFO L175 Difference]: Start difference. First operand has 217 places, 212 transitions, 2040 flow. Second operand 10 states and 159 transitions. [2024-06-27 21:13:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 258 transitions, 2862 flow [2024-06-27 21:13:53,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 258 transitions, 2732 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:53,313 INFO L231 Difference]: Finished difference. Result has 220 places, 213 transitions, 2078 flow [2024-06-27 21:13:53,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2078, PETRI_PLACES=220, PETRI_TRANSITIONS=213} [2024-06-27 21:13:53,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-27 21:13:53,313 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 213 transitions, 2078 flow [2024-06-27 21:13:53,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:53,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:53,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:53,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:13:53,313 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 21:13:53,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1592785200, now seen corresponding path program 3 times [2024-06-27 21:13:53,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:53,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427070505] [2024-06-27 21:13:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:53,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:57,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:57,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427070505] [2024-06-27 21:13:57,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427070505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:57,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:57,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:13:57,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065024396] [2024-06-27 21:13:57,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:57,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:13:57,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:13:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:13:57,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:13:57,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 213 transitions, 2078 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:57,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:57,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:13:57,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:59,071 INFO L124 PetriNetUnfolderBase]: 2566/3968 cut-off events. [2024-06-27 21:13:59,071 INFO L125 PetriNetUnfolderBase]: For 231927/231927 co-relation queries the response was YES. [2024-06-27 21:13:59,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23026 conditions, 3968 events. 2566/3968 cut-off events. For 231927/231927 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21075 event pairs, 647 based on Foata normal form. 12/3976 useless extension candidates. Maximal degree in co-relation 22924. Up to 3521 conditions per place. [2024-06-27 21:13:59,103 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 59 changer transitions 0/248 dead transitions. [2024-06-27 21:13:59,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 248 transitions, 2680 flow [2024-06-27 21:13:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:13:59,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 21:13:59,105 INFO L175 Difference]: Start difference. First operand has 220 places, 213 transitions, 2078 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:13:59,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 248 transitions, 2680 flow [2024-06-27 21:13:59,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 248 transitions, 2508 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:59,389 INFO L231 Difference]: Finished difference. Result has 222 places, 213 transitions, 2029 flow [2024-06-27 21:13:59,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2029, PETRI_PLACES=222, PETRI_TRANSITIONS=213} [2024-06-27 21:13:59,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 21:13:59,389 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 213 transitions, 2029 flow [2024-06-27 21:13:59,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:13:59,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:59,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:59,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:13:59,389 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 21:13:59,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -733779186, now seen corresponding path program 4 times [2024-06-27 21:13:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087928448] [2024-06-27 21:13:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:59,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:03,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087928448] [2024-06-27 21:14:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087928448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:03,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:03,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:03,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679403101] [2024-06-27 21:14:03,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:03,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:03,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:03,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 213 transitions, 2029 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:03,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:03,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:03,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:05,030 INFO L124 PetriNetUnfolderBase]: 2594/4012 cut-off events. [2024-06-27 21:14:05,030 INFO L125 PetriNetUnfolderBase]: For 227955/227955 co-relation queries the response was YES. [2024-06-27 21:14:05,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23009 conditions, 4012 events. 2594/4012 cut-off events. For 227955/227955 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21375 event pairs, 499 based on Foata normal form. 8/4016 useless extension candidates. Maximal degree in co-relation 22906. Up to 3385 conditions per place. [2024-06-27 21:14:05,062 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 67 changer transitions 0/256 dead transitions. [2024-06-27 21:14:05,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 256 transitions, 2845 flow [2024-06-27 21:14:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:14:05,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 21:14:05,064 INFO L175 Difference]: Start difference. First operand has 222 places, 213 transitions, 2029 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:14:05,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 256 transitions, 2845 flow [2024-06-27 21:14:05,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 256 transitions, 2708 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:14:05,344 INFO L231 Difference]: Finished difference. Result has 222 places, 214 transitions, 2072 flow [2024-06-27 21:14:05,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2072, PETRI_PLACES=222, PETRI_TRANSITIONS=214} [2024-06-27 21:14:05,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 21:14:05,345 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 214 transitions, 2072 flow [2024-06-27 21:14:05,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:05,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:05,345 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, 1, 1] [2024-06-27 21:14:05,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:14:05,346 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 21:14:05,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash -722351346, now seen corresponding path program 5 times [2024-06-27 21:14:05,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:05,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317057818] [2024-06-27 21:14:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:09,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317057818] [2024-06-27 21:14:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317057818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:09,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:09,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:09,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402367567] [2024-06-27 21:14:09,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:09,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:09,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:09,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:09,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 214 transitions, 2072 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:09,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:09,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:09,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:10,203 INFO L124 PetriNetUnfolderBase]: 2642/4088 cut-off events. [2024-06-27 21:14:10,203 INFO L125 PetriNetUnfolderBase]: For 248601/248601 co-relation queries the response was YES. [2024-06-27 21:14:10,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24182 conditions, 4088 events. 2642/4088 cut-off events. For 248601/248601 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21906 event pairs, 513 based on Foata normal form. 8/4092 useless extension candidates. Maximal degree in co-relation 24078. Up to 2879 conditions per place. [2024-06-27 21:14:10,237 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 71 changer transitions 0/250 dead transitions. [2024-06-27 21:14:10,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 250 transitions, 2908 flow [2024-06-27 21:14:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:14:10,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 21:14:10,239 INFO L175 Difference]: Start difference. First operand has 222 places, 214 transitions, 2072 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:14:10,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 250 transitions, 2908 flow [2024-06-27 21:14:10,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 250 transitions, 2740 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:10,577 INFO L231 Difference]: Finished difference. Result has 223 places, 216 transitions, 2136 flow [2024-06-27 21:14:10,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1904, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2136, PETRI_PLACES=223, PETRI_TRANSITIONS=216} [2024-06-27 21:14:10,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-27 21:14:10,578 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 216 transitions, 2136 flow [2024-06-27 21:14:10,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:10,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:10,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:10,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:14:10,578 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 21:14:10,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:10,579 INFO L85 PathProgramCache]: Analyzing trace with hash 912379858, now seen corresponding path program 6 times [2024-06-27 21:14:10,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:10,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616649831] [2024-06-27 21:14:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:10,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:14,724 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 21:14:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616649831] [2024-06-27 21:14:14,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616649831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:14,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:14,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:14,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46175082] [2024-06-27 21:14:14,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:14,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:14,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:14,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 216 transitions, 2136 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:14,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:14,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:14,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:16,584 INFO L124 PetriNetUnfolderBase]: 2686/4156 cut-off events. [2024-06-27 21:14:16,584 INFO L125 PetriNetUnfolderBase]: For 263651/263651 co-relation queries the response was YES. [2024-06-27 21:14:16,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24529 conditions, 4156 events. 2686/4156 cut-off events. For 263651/263651 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 22367 event pairs, 679 based on Foata normal form. 12/4164 useless extension candidates. Maximal degree in co-relation 24424. Up to 3709 conditions per place. [2024-06-27 21:14:16,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 57 changer transitions 0/245 dead transitions. [2024-06-27 21:14:16,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 245 transitions, 2728 flow [2024-06-27 21:14:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 21:14:16,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-27 21:14:16,622 INFO L175 Difference]: Start difference. First operand has 223 places, 216 transitions, 2136 flow. Second operand 9 states and 134 transitions. [2024-06-27 21:14:16,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 245 transitions, 2728 flow [2024-06-27 21:14:16,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 245 transitions, 2621 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 21:14:16,966 INFO L231 Difference]: Finished difference. Result has 228 places, 217 transitions, 2166 flow [2024-06-27 21:14:16,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2166, PETRI_PLACES=228, PETRI_TRANSITIONS=217} [2024-06-27 21:14:16,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 21:14:16,966 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 217 transitions, 2166 flow [2024-06-27 21:14:16,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:16,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:16,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:16,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:14:16,967 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 21:14:16,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1329334606, now seen corresponding path program 12 times [2024-06-27 21:14:16,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:16,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27358276] [2024-06-27 21:14:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:20,681 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 21:14:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27358276] [2024-06-27 21:14:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27358276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:20,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:20,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:20,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600158798] [2024-06-27 21:14:20,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:20,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:20,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:20,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:20,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:20,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 217 transitions, 2166 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:20,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:20,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:20,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:22,499 INFO L124 PetriNetUnfolderBase]: 2914/4520 cut-off events. [2024-06-27 21:14:22,499 INFO L125 PetriNetUnfolderBase]: For 400821/400821 co-relation queries the response was YES. [2024-06-27 21:14:22,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26063 conditions, 4520 events. 2914/4520 cut-off events. For 400821/400821 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24642 event pairs, 703 based on Foata normal form. 68/4584 useless extension candidates. Maximal degree in co-relation 25956. Up to 3289 conditions per place. [2024-06-27 21:14:22,536 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 91 changer transitions 5/262 dead transitions. [2024-06-27 21:14:22,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 262 transitions, 2860 flow [2024-06-27 21:14:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-27 21:14:22,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-27 21:14:22,537 INFO L175 Difference]: Start difference. First operand has 228 places, 217 transitions, 2166 flow. Second operand 11 states and 171 transitions. [2024-06-27 21:14:22,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 262 transitions, 2860 flow [2024-06-27 21:14:22,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 262 transitions, 2741 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:22,870 INFO L231 Difference]: Finished difference. Result has 232 places, 217 transitions, 2263 flow [2024-06-27 21:14:22,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2263, PETRI_PLACES=232, PETRI_TRANSITIONS=217} [2024-06-27 21:14:22,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 21:14:22,870 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 217 transitions, 2263 flow [2024-06-27 21:14:22,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:22,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:22,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:22,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:14:22,871 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 21:14:22,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1312061432, now seen corresponding path program 6 times [2024-06-27 21:14:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:22,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404564243] [2024-06-27 21:14:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404564243] [2024-06-27 21:14:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404564243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:26,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:26,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131137350] [2024-06-27 21:14:26,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:26,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:26,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 217 transitions, 2263 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:26,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:26,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:26,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:28,548 INFO L124 PetriNetUnfolderBase]: 3054/4756 cut-off events. [2024-06-27 21:14:28,548 INFO L125 PetriNetUnfolderBase]: For 385492/385492 co-relation queries the response was YES. [2024-06-27 21:14:28,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27328 conditions, 4756 events. 3054/4756 cut-off events. For 385492/385492 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26237 event pairs, 701 based on Foata normal form. 56/4808 useless extension candidates. Maximal degree in co-relation 27220. Up to 3219 conditions per place. [2024-06-27 21:14:28,588 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 165 selfloop transitions, 93 changer transitions 11/272 dead transitions. [2024-06-27 21:14:28,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 272 transitions, 3029 flow [2024-06-27 21:14:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:14:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:14:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 21:14:28,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 21:14:28,589 INFO L175 Difference]: Start difference. First operand has 232 places, 217 transitions, 2263 flow. Second operand 12 states and 188 transitions. [2024-06-27 21:14:28,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 272 transitions, 3029 flow [2024-06-27 21:14:28,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 272 transitions, 2820 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 21:14:28,975 INFO L231 Difference]: Finished difference. Result has 235 places, 217 transitions, 2271 flow [2024-06-27 21:14:28,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2271, PETRI_PLACES=235, PETRI_TRANSITIONS=217} [2024-06-27 21:14:28,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 21:14:28,975 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 217 transitions, 2271 flow [2024-06-27 21:14:28,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:28,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:28,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:28,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:14:28,976 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 21:14:28,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash -929468148, now seen corresponding path program 3 times [2024-06-27 21:14:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:28,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58405378] [2024-06-27 21:14:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:28,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:32,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:32,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58405378] [2024-06-27 21:14:32,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58405378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:32,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110854046] [2024-06-27 21:14:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:32,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:32,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:32,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:32,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 217 transitions, 2271 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:32,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:32,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:32,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:34,701 INFO L124 PetriNetUnfolderBase]: 3006/4684 cut-off events. [2024-06-27 21:14:34,701 INFO L125 PetriNetUnfolderBase]: For 279361/279361 co-relation queries the response was YES. [2024-06-27 21:14:34,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27165 conditions, 4684 events. 3006/4684 cut-off events. For 279361/279361 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25916 event pairs, 821 based on Foata normal form. 8/4688 useless extension candidates. Maximal degree in co-relation 27056. Up to 4167 conditions per place. [2024-06-27 21:14:34,740 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 59 changer transitions 1/251 dead transitions. [2024-06-27 21:14:34,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 251 transitions, 2921 flow [2024-06-27 21:14:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:14:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:14:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-27 21:14:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-27 21:14:34,742 INFO L175 Difference]: Start difference. First operand has 235 places, 217 transitions, 2271 flow. Second operand 10 states and 146 transitions. [2024-06-27 21:14:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 251 transitions, 2921 flow [2024-06-27 21:14:35,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 251 transitions, 2705 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:14:35,142 INFO L231 Difference]: Finished difference. Result has 235 places, 218 transitions, 2223 flow [2024-06-27 21:14:35,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2223, PETRI_PLACES=235, PETRI_TRANSITIONS=218} [2024-06-27 21:14:35,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 21:14:35,142 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 218 transitions, 2223 flow [2024-06-27 21:14:35,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:35,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:35,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:35,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:14:35,143 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 21:14:35,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1326108338, now seen corresponding path program 4 times [2024-06-27 21:14:35,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:35,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786917677] [2024-06-27 21:14:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:35,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:39,031 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 21:14:39,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:39,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786917677] [2024-06-27 21:14:39,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786917677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:39,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:39,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618301773] [2024-06-27 21:14:39,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:39,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:39,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:39,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:39,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 218 transitions, 2223 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:39,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:39,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:39,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:40,224 INFO L124 PetriNetUnfolderBase]: 3034/4728 cut-off events. [2024-06-27 21:14:40,224 INFO L125 PetriNetUnfolderBase]: For 288620/288620 co-relation queries the response was YES. [2024-06-27 21:14:40,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27250 conditions, 4728 events. 3034/4728 cut-off events. For 288620/288620 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26170 event pairs, 655 based on Foata normal form. 8/4732 useless extension candidates. Maximal degree in co-relation 27140. Up to 3439 conditions per place. [2024-06-27 21:14:40,262 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 173 selfloop transitions, 78 changer transitions 0/254 dead transitions. [2024-06-27 21:14:40,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 254 transitions, 3175 flow [2024-06-27 21:14:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:14:40,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 21:14:40,263 INFO L175 Difference]: Start difference. First operand has 235 places, 218 transitions, 2223 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:14:40,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 254 transitions, 3175 flow [2024-06-27 21:14:40,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 254 transitions, 3021 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:40,631 INFO L231 Difference]: Finished difference. Result has 235 places, 219 transitions, 2275 flow [2024-06-27 21:14:40,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2275, PETRI_PLACES=235, PETRI_TRANSITIONS=219} [2024-06-27 21:14:40,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 21:14:40,632 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 219 transitions, 2275 flow [2024-06-27 21:14:40,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:40,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:40,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:14:40,632 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 21:14:40,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1325871002, now seen corresponding path program 7 times [2024-06-27 21:14:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389169316] [2024-06-27 21:14:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:44,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:44,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389169316] [2024-06-27 21:14:44,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389169316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:44,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:44,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:44,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808336778] [2024-06-27 21:14:44,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:44,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:44,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:44,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:44,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 219 transitions, 2275 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:44,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:44,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:44,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:46,169 INFO L124 PetriNetUnfolderBase]: 3518/5492 cut-off events. [2024-06-27 21:14:46,169 INFO L125 PetriNetUnfolderBase]: For 567471/567471 co-relation queries the response was YES. [2024-06-27 21:14:46,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34031 conditions, 5492 events. 3518/5492 cut-off events. For 567471/567471 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 30906 event pairs, 889 based on Foata normal form. 56/5544 useless extension candidates. Maximal degree in co-relation 33920. Up to 2995 conditions per place. [2024-06-27 21:14:46,214 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 96 changer transitions 12/275 dead transitions. [2024-06-27 21:14:46,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 275 transitions, 3211 flow [2024-06-27 21:14:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 21:14:46,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401330376940133 [2024-06-27 21:14:46,215 INFO L175 Difference]: Start difference. First operand has 235 places, 219 transitions, 2275 flow. Second operand 11 states and 181 transitions. [2024-06-27 21:14:46,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 275 transitions, 3211 flow [2024-06-27 21:14:46,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 275 transitions, 2945 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:46,812 INFO L231 Difference]: Finished difference. Result has 239 places, 218 transitions, 2216 flow [2024-06-27 21:14:46,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2216, PETRI_PLACES=239, PETRI_TRANSITIONS=218} [2024-06-27 21:14:46,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 21:14:46,812 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 218 transitions, 2216 flow [2024-06-27 21:14:46,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:46,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:46,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:46,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:14:46,813 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 21:14:46,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:46,813 INFO L85 PathProgramCache]: Analyzing trace with hash 924586418, now seen corresponding path program 5 times [2024-06-27 21:14:46,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:46,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635666852] [2024-06-27 21:14:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:46,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:50,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635666852] [2024-06-27 21:14:50,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635666852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:50,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:50,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57894458] [2024-06-27 21:14:50,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:50,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:50,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:50,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 218 transitions, 2216 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:50,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:50,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:50,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:52,520 INFO L124 PetriNetUnfolderBase]: 2958/4596 cut-off events. [2024-06-27 21:14:52,520 INFO L125 PetriNetUnfolderBase]: For 451591/451591 co-relation queries the response was YES. [2024-06-27 21:14:52,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30743 conditions, 4596 events. 2958/4596 cut-off events. For 451591/451591 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 25119 event pairs, 883 based on Foata normal form. 8/4600 useless extension candidates. Maximal degree in co-relation 30632. Up to 4123 conditions per place. [2024-06-27 21:14:52,556 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 62 changer transitions 0/248 dead transitions. [2024-06-27 21:14:52,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 248 transitions, 2846 flow [2024-06-27 21:14:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 21:14:52,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-27 21:14:52,557 INFO L175 Difference]: Start difference. First operand has 239 places, 218 transitions, 2216 flow. Second operand 9 states and 134 transitions. [2024-06-27 21:14:52,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 248 transitions, 2846 flow [2024-06-27 21:14:53,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 248 transitions, 2614 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 21:14:53,060 INFO L231 Difference]: Finished difference. Result has 239 places, 219 transitions, 2156 flow [2024-06-27 21:14:53,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=239, PETRI_TRANSITIONS=219} [2024-06-27 21:14:53,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 21:14:53,061 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 219 transitions, 2156 flow [2024-06-27 21:14:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:53,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:53,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:14:53,061 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 21:14:53,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 159420566, now seen corresponding path program 7 times [2024-06-27 21:14:53,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867532088] [2024-06-27 21:14:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:53,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867532088] [2024-06-27 21:14:56,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867532088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:56,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:14:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890972291] [2024-06-27 21:14:56,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:14:56,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:14:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:14:56,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:14:56,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 219 transitions, 2156 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:56,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:56,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:14:56,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:58,622 INFO L124 PetriNetUnfolderBase]: 2698/4196 cut-off events. [2024-06-27 21:14:58,622 INFO L125 PetriNetUnfolderBase]: For 318031/318034 co-relation queries the response was YES. [2024-06-27 21:14:58,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25092 conditions, 4196 events. 2698/4196 cut-off events. For 318031/318034 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22768 event pairs, 775 based on Foata normal form. 12/4204 useless extension candidates. Maximal degree in co-relation 24980. Up to 3781 conditions per place. [2024-06-27 21:14:58,660 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 54 changer transitions 0/246 dead transitions. [2024-06-27 21:14:58,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 246 transitions, 2744 flow [2024-06-27 21:14:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:14:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:14:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-27 21:14:58,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33902439024390246 [2024-06-27 21:14:58,662 INFO L175 Difference]: Start difference. First operand has 239 places, 219 transitions, 2156 flow. Second operand 10 states and 139 transitions. [2024-06-27 21:14:58,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 246 transitions, 2744 flow [2024-06-27 21:14:59,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 246 transitions, 2586 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:59,105 INFO L231 Difference]: Finished difference. Result has 242 places, 220 transitions, 2129 flow [2024-06-27 21:14:59,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2129, PETRI_PLACES=242, PETRI_TRANSITIONS=220} [2024-06-27 21:14:59,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 21:14:59,106 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 220 transitions, 2129 flow [2024-06-27 21:14:59,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:14:59,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:59,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:59,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:14:59,106 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 21:14:59,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:59,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2080123178, now seen corresponding path program 13 times [2024-06-27 21:14:59,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:59,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933992829] [2024-06-27 21:14:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:59,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:02,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:02,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933992829] [2024-06-27 21:15:02,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933992829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:02,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:02,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:02,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680425593] [2024-06-27 21:15:02,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:02,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:02,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:02,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:15:02,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 220 transitions, 2129 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:02,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:02,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:15:02,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:04,429 INFO L124 PetriNetUnfolderBase]: 2742/4264 cut-off events. [2024-06-27 21:15:04,430 INFO L125 PetriNetUnfolderBase]: For 326631/326634 co-relation queries the response was YES. [2024-06-27 21:15:04,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25549 conditions, 4264 events. 2742/4264 cut-off events. For 326631/326634 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23263 event pairs, 761 based on Foata normal form. 12/4272 useless extension candidates. Maximal degree in co-relation 25436. Up to 3833 conditions per place. [2024-06-27 21:15:04,469 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 57 changer transitions 0/245 dead transitions. [2024-06-27 21:15:04,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 245 transitions, 2737 flow [2024-06-27 21:15:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-27 21:15:04,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-27 21:15:04,470 INFO L175 Difference]: Start difference. First operand has 242 places, 220 transitions, 2129 flow. Second operand 9 states and 129 transitions. [2024-06-27 21:15:04,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 245 transitions, 2737 flow [2024-06-27 21:15:04,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 245 transitions, 2622 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:04,909 INFO L231 Difference]: Finished difference. Result has 243 places, 221 transitions, 2175 flow [2024-06-27 21:15:04,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2175, PETRI_PLACES=243, PETRI_TRANSITIONS=221} [2024-06-27 21:15:04,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-27 21:15:04,910 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 221 transitions, 2175 flow [2024-06-27 21:15:04,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:04,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:04,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:04,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:15:04,910 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 21:15:04,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:04,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1418122186, now seen corresponding path program 8 times [2024-06-27 21:15:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:04,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445027378] [2024-06-27 21:15:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:04,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445027378] [2024-06-27 21:15:08,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445027378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:08,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:08,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737660116] [2024-06-27 21:15:08,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:08,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:08,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:08,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:15:08,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 221 transitions, 2175 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:08,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:08,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:15:08,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:10,408 INFO L124 PetriNetUnfolderBase]: 2714/4224 cut-off events. [2024-06-27 21:15:10,408 INFO L125 PetriNetUnfolderBase]: For 300414/300417 co-relation queries the response was YES. [2024-06-27 21:15:10,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24502 conditions, 4224 events. 2714/4224 cut-off events. For 300414/300417 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23052 event pairs, 759 based on Foata normal form. 12/4232 useless extension candidates. Maximal degree in co-relation 24388. Up to 3809 conditions per place. [2024-06-27 21:15:10,444 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 56 changer transitions 0/245 dead transitions. [2024-06-27 21:15:10,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 245 transitions, 2741 flow [2024-06-27 21:15:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-27 21:15:10,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523035230352303 [2024-06-27 21:15:10,446 INFO L175 Difference]: Start difference. First operand has 243 places, 221 transitions, 2175 flow. Second operand 9 states and 130 transitions. [2024-06-27 21:15:10,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 245 transitions, 2741 flow [2024-06-27 21:15:10,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 245 transitions, 2590 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:10,885 INFO L231 Difference]: Finished difference. Result has 245 places, 221 transitions, 2141 flow [2024-06-27 21:15:10,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2141, PETRI_PLACES=245, PETRI_TRANSITIONS=221} [2024-06-27 21:15:10,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 21:15:10,886 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 221 transitions, 2141 flow [2024-06-27 21:15:10,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:10,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:10,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:15:10,886 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 21:15:10,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash 639542998, now seen corresponding path program 14 times [2024-06-27 21:15:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:10,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255235150] [2024-06-27 21:15:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:10,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:14,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:14,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255235150] [2024-06-27 21:15:14,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255235150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:14,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:14,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:14,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825972561] [2024-06-27 21:15:14,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:14,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:14,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:14,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:15:14,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 221 transitions, 2141 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:14,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:14,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:15:14,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:16,283 INFO L124 PetriNetUnfolderBase]: 2758/4292 cut-off events. [2024-06-27 21:15:16,283 INFO L125 PetriNetUnfolderBase]: For 307523/307526 co-relation queries the response was YES. [2024-06-27 21:15:16,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24787 conditions, 4292 events. 2758/4292 cut-off events. For 307523/307526 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23464 event pairs, 753 based on Foata normal form. 12/4300 useless extension candidates. Maximal degree in co-relation 24672. Up to 3845 conditions per place. [2024-06-27 21:15:16,322 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 62 changer transitions 0/249 dead transitions. [2024-06-27 21:15:16,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 249 transitions, 2767 flow [2024-06-27 21:15:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 21:15:16,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463414634146341 [2024-06-27 21:15:16,323 INFO L175 Difference]: Start difference. First operand has 245 places, 221 transitions, 2141 flow. Second operand 10 states and 142 transitions. [2024-06-27 21:15:16,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 249 transitions, 2767 flow [2024-06-27 21:15:16,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 249 transitions, 2630 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:16,803 INFO L231 Difference]: Finished difference. Result has 247 places, 222 transitions, 2177 flow [2024-06-27 21:15:16,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2177, PETRI_PLACES=247, PETRI_TRANSITIONS=222} [2024-06-27 21:15:16,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-27 21:15:16,803 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 222 transitions, 2177 flow [2024-06-27 21:15:16,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:16,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:16,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:15:16,804 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 21:15:16,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2096756438, now seen corresponding path program 15 times [2024-06-27 21:15:16,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:16,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079326009] [2024-06-27 21:15:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:20,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079326009] [2024-06-27 21:15:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079326009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:20,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:20,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:20,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479209679] [2024-06-27 21:15:20,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:20,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:20,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:20,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:20,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:15:20,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 222 transitions, 2177 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:20,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:20,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:15:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:22,186 INFO L124 PetriNetUnfolderBase]: 2802/4360 cut-off events. [2024-06-27 21:15:22,187 INFO L125 PetriNetUnfolderBase]: For 319615/319618 co-relation queries the response was YES. [2024-06-27 21:15:22,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25508 conditions, 4360 events. 2802/4360 cut-off events. For 319615/319618 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23893 event pairs, 835 based on Foata normal form. 12/4368 useless extension candidates. Maximal degree in co-relation 25392. Up to 3445 conditions per place. [2024-06-27 21:15:22,226 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 93 changer transitions 0/250 dead transitions. [2024-06-27 21:15:22,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 250 transitions, 2805 flow [2024-06-27 21:15:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 21:15:22,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:15:22,227 INFO L175 Difference]: Start difference. First operand has 247 places, 222 transitions, 2177 flow. Second operand 9 states and 135 transitions. [2024-06-27 21:15:22,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 250 transitions, 2805 flow [2024-06-27 21:15:22,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 250 transitions, 2646 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:22,711 INFO L231 Difference]: Finished difference. Result has 248 places, 223 transitions, 2255 flow [2024-06-27 21:15:22,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2255, PETRI_PLACES=248, PETRI_TRANSITIONS=223} [2024-06-27 21:15:22,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 21:15:22,712 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 223 transitions, 2255 flow [2024-06-27 21:15:22,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:22,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:22,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:22,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:15:22,713 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 21:15:22,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash -877046934, now seen corresponding path program 8 times [2024-06-27 21:15:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:22,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819000801] [2024-06-27 21:15:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:22,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:26,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819000801] [2024-06-27 21:15:26,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819000801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:26,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026310471] [2024-06-27 21:15:26,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:26,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:26,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:15:26,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 223 transitions, 2255 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:26,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:26,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:15:26,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:27,907 INFO L124 PetriNetUnfolderBase]: 2830/4404 cut-off events. [2024-06-27 21:15:27,907 INFO L125 PetriNetUnfolderBase]: For 313210/313213 co-relation queries the response was YES. [2024-06-27 21:15:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25909 conditions, 4404 events. 2830/4404 cut-off events. For 313210/313213 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24119 event pairs, 781 based on Foata normal form. 8/4408 useless extension candidates. Maximal degree in co-relation 25792. Up to 3935 conditions per place. [2024-06-27 21:15:27,948 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 190 selfloop transitions, 60 changer transitions 0/253 dead transitions. [2024-06-27 21:15:27,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 253 transitions, 2905 flow [2024-06-27 21:15:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:15:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:15:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 21:15:27,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463414634146341 [2024-06-27 21:15:27,950 INFO L175 Difference]: Start difference. First operand has 248 places, 223 transitions, 2255 flow. Second operand 10 states and 142 transitions. [2024-06-27 21:15:27,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 253 transitions, 2905 flow [2024-06-27 21:15:28,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 253 transitions, 2682 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:28,506 INFO L231 Difference]: Finished difference. Result has 251 places, 224 transitions, 2204 flow [2024-06-27 21:15:28,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2204, PETRI_PLACES=251, PETRI_TRANSITIONS=224} [2024-06-27 21:15:28,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 21:15:28,507 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 224 transitions, 2204 flow [2024-06-27 21:15:28,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:28,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:28,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:28,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:15:28,508 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 21:15:28,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2096695988, now seen corresponding path program 16 times [2024-06-27 21:15:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:28,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728378787] [2024-06-27 21:15:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:31,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:31,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728378787] [2024-06-27 21:15:31,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728378787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:31,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:31,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935455637] [2024-06-27 21:15:31,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:31,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:31,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:31,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:32,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:15:32,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 224 transitions, 2204 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:32,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:32,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:15:32,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:33,697 INFO L124 PetriNetUnfolderBase]: 2848/4434 cut-off events. [2024-06-27 21:15:33,697 INFO L125 PetriNetUnfolderBase]: For 319399/319402 co-relation queries the response was YES. [2024-06-27 21:15:33,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25358 conditions, 4434 events. 2848/4434 cut-off events. For 319399/319402 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 24457 event pairs, 833 based on Foata normal form. 12/4442 useless extension candidates. Maximal degree in co-relation 25240. Up to 3243 conditions per place. [2024-06-27 21:15:33,735 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 97 changer transitions 0/256 dead transitions. [2024-06-27 21:15:33,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 256 transitions, 2876 flow [2024-06-27 21:15:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:15:33,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-27 21:15:33,737 INFO L175 Difference]: Start difference. First operand has 251 places, 224 transitions, 2204 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:15:33,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 256 transitions, 2876 flow [2024-06-27 21:15:34,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 256 transitions, 2716 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:15:34,258 INFO L231 Difference]: Finished difference. Result has 252 places, 225 transitions, 2292 flow [2024-06-27 21:15:34,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2292, PETRI_PLACES=252, PETRI_TRANSITIONS=225} [2024-06-27 21:15:34,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 21:15:34,258 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 225 transitions, 2292 flow [2024-06-27 21:15:34,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:34,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:34,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:34,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:15:34,259 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 21:15:34,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1009082324, now seen corresponding path program 9 times [2024-06-27 21:15:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:34,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133603820] [2024-06-27 21:15:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:37,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:37,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133603820] [2024-06-27 21:15:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133603820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:37,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:37,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:15:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422811895] [2024-06-27 21:15:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:15:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:15:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:15:37,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-27 21:15:37,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 225 transitions, 2292 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:37,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:37,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-27 21:15:37,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:39,553 INFO L124 PetriNetUnfolderBase]: 2876/4478 cut-off events. [2024-06-27 21:15:39,553 INFO L125 PetriNetUnfolderBase]: For 317589/317592 co-relation queries the response was YES. [2024-06-27 21:15:39,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25999 conditions, 4478 events. 2876/4478 cut-off events. For 317589/317592 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 24737 event pairs, 791 based on Foata normal form. 8/4482 useless extension candidates. Maximal degree in co-relation 25880. Up to 3993 conditions per place. [2024-06-27 21:15:39,592 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 190 selfloop transitions, 65 changer transitions 0/258 dead transitions. [2024-06-27 21:15:39,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 258 transitions, 2964 flow [2024-06-27 21:15:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:15:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:15:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 155 transitions. [2024-06-27 21:15:39,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3436807095343681 [2024-06-27 21:15:39,593 INFO L175 Difference]: Start difference. First operand has 252 places, 225 transitions, 2292 flow. Second operand 11 states and 155 transitions. [2024-06-27 21:15:39,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 258 transitions, 2964 flow [2024-06-27 21:15:40,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 258 transitions, 2728 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:40,085 INFO L231 Difference]: Finished difference. Result has 256 places, 226 transitions, 2242 flow [2024-06-27 21:15:40,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2242, PETRI_PLACES=256, PETRI_TRANSITIONS=226} [2024-06-27 21:15:40,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:15:40,085 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 226 transitions, 2242 flow [2024-06-27 21:15:40,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 21:15:40,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:40,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:40,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:15:40,086 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 21:15:40,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash 794026114, now seen corresponding path program 6 times [2024-06-27 21:15:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:40,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314073663] [2024-06-27 21:15:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:40,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15