./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:09:30,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:09:30,294 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:09:30,302 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:09:30,302 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:09:30,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:09:30,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:09:30,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:09:30,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:09:30,324 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:09:30,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:09:30,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:09:30,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:09:30,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:09:30,325 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:09:30,326 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:09:30,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:09:30,326 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:09:30,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:09:30,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:09:30,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:09:30,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:09:30,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:09:30,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:09:30,332 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:09:30,332 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:09:30,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:09:30,333 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:09:30,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:09:30,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:09:30,333 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:09:30,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:09:30,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:09:30,337 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:09:30,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:09:30,337 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:09:30,338 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:09:30,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:09:30,338 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:09:30,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:09:30,338 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:09:30,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:09:30,339 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:09:30,339 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:09:30,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:09:30,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:09:30,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:09:30,581 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:09:30,582 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:09:30,583 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-27 23:09:30,705 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:09:30,705 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:09:30,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-27 23:09:31,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:09:31,858 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:09:31,859 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-27 23:09:31,880 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/257d76f9b/a8c347e22f024d2f9f4e6ad4be3301ee/FLAGcfd54835e [2024-06-27 23:09:31,897 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/257d76f9b/a8c347e22f024d2f9f4e6ad4be3301ee [2024-06-27 23:09:31,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:09:31,898 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:09:31,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:09:31,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:09:31,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:09:31,903 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:09:30" (1/2) ... [2024-06-27 23:09:31,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78fece3e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:09:31, skipping insertion in model container [2024-06-27 23:09:31,904 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:09:30" (1/2) ... [2024-06-27 23:09:31,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63ea57b7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:09:31, skipping insertion in model container [2024-06-27 23:09:31,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:09:31" (2/2) ... [2024-06-27 23:09:31,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78fece3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:31, skipping insertion in model container [2024-06-27 23:09:31,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:09:31" (2/2) ... [2024-06-27 23:09:31,907 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:09:31,930 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:09:31,931 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:09:31,932 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:09:31,932 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:09:31,932 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:09:31,932 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-27 23:09:31,974 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:09:32,307 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:09:32,316 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:09:32,448 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:09:32,475 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:09:32,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32 WrapperNode [2024-06-27 23:09:32,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:09:32,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:09:32,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:09:32,477 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:09:32,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,536 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-27 23:09:32,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:09:32,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:09:32,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:09:32,537 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:09:32,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,574 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:09:32,575 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,575 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,586 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,590 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:09:32,590 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:09:32,590 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:09:32,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:09:32,591 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (1/1) ... [2024-06-27 23:09:32,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:09:32,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:09:32,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:09:32,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:09:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:09:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:09:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:09:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:09:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:09:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:09:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:09:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:09:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:09:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:09:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:09:32,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:09:32,683 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:09:32,814 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:09:32,816 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:09:33,227 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:09:33,229 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:09:33,405 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:09:33,405 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:09:33,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:09:33 BoogieIcfgContainer [2024-06-27 23:09:33,406 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:09:33,409 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:09:33,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:09:33,411 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:09:33,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:09:30" (1/4) ... [2024-06-27 23:09:33,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479598f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:09:33, skipping insertion in model container [2024-06-27 23:09:33,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:09:31" (2/4) ... [2024-06-27 23:09:33,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479598f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:09:33, skipping insertion in model container [2024-06-27 23:09:33,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:09:32" (3/4) ... [2024-06-27 23:09:33,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479598f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:09:33, skipping insertion in model container [2024-06-27 23:09:33,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:09:33" (4/4) ... [2024-06-27 23:09:33,417 INFO L112 eAbstractionObserver]: Analyzing ICFG mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-27 23:09:33,430 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:09:33,430 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:09:33,430 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:09:33,473 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:09:33,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:09:33,549 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 23:09:33,550 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:09:33,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:09:33,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:09:33,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 23:09:33,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:09:33,565 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;@289e5c57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:09:33,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:09:33,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:09:33,568 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:09:33,568 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:09:33,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:33,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:09:33,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:33,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:33,573 INFO L85 PathProgramCache]: Analyzing trace with hash 402799615, now seen corresponding path program 1 times [2024-06-27 23:09:33,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:33,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993927346] [2024-06-27 23:09:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:33,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:35,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:35,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993927346] [2024-06-27 23:09:35,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993927346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:35,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:35,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:09:35,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178620332] [2024-06-27 23:09:35,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:35,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:09:35,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:09:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:09:35,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-27 23:09:35,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:35,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:35,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-27 23:09:35,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:35,396 INFO L124 PetriNetUnfolderBase]: 869/1405 cut-off events. [2024-06-27 23:09:35,396 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 23:09:35,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 1405 events. 869/1405 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7205 event pairs, 566 based on Foata normal form. 1/1355 useless extension candidates. Maximal degree in co-relation 2771. Up to 1315 conditions per place. [2024-06-27 23:09:35,408 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 23:09:35,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-27 23:09:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:09:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:09:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 23:09:35,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 23:09:35,419 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 82 transitions. [2024-06-27 23:09:35,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-27 23:09:35,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:09:35,424 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 23:09:35,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 23:09:35,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 23:09:35,431 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 23:09:35,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:35,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:35,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:09:35,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:35,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash 543408094, now seen corresponding path program 1 times [2024-06-27 23:09:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:35,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581522491] [2024-06-27 23:09:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:35,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:36,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581522491] [2024-06-27 23:09:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581522491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:36,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:09:36,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143746002] [2024-06-27 23:09:36,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:36,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:09:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:09:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:09:36,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 23:09:36,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:36,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:36,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 23:09:36,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:36,630 INFO L124 PetriNetUnfolderBase]: 996/1571 cut-off events. [2024-06-27 23:09:36,631 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-06-27 23:09:36,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3586 conditions, 1571 events. 996/1571 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7909 event pairs, 519 based on Foata normal form. 3/1570 useless extension candidates. Maximal degree in co-relation 3574. Up to 1484 conditions per place. [2024-06-27 23:09:36,639 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 23:09:36,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-27 23:09:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:09:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:09:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-27 23:09:36,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 23:09:36,641 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 104 transitions. [2024-06-27 23:09:36,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-27 23:09:36,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:09:36,644 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 23:09:36,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 23:09:36,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 23:09:36,645 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 23:09:36,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:36,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:36,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:36,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:09:36,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:36,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash 939928731, now seen corresponding path program 1 times [2024-06-27 23:09:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:36,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913961445] [2024-06-27 23:09:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:36,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:37,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:37,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913961445] [2024-06-27 23:09:37,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913961445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:37,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:37,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:09:37,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909794826] [2024-06-27 23:09:37,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:37,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:09:37,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:09:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:09:37,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:09:37,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:37,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:37,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:09:37,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:38,340 INFO L124 PetriNetUnfolderBase]: 1265/1958 cut-off events. [2024-06-27 23:09:38,340 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2024-06-27 23:09:38,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 1958 events. 1265/1958 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9644 event pairs, 445 based on Foata normal form. 6/1957 useless extension candidates. Maximal degree in co-relation 4941. Up to 1828 conditions per place. [2024-06-27 23:09:38,349 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-27 23:09:38,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 350 flow [2024-06-27 23:09:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:09:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:09:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 23:09:38,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-27 23:09:38,351 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 143 transitions. [2024-06-27 23:09:38,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 350 flow [2024-06-27 23:09:38,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 330 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:09:38,354 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 23:09:38,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 23:09:38,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 23:09:38,355 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 23:09:38,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:38,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:38,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:09:38,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:38,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 328322472, now seen corresponding path program 1 times [2024-06-27 23:09:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207008176] [2024-06-27 23:09:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:38,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:39,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:39,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207008176] [2024-06-27 23:09:39,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207008176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:39,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:39,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:09:39,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708377544] [2024-06-27 23:09:39,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:09:39,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:09:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:09:39,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:09:39,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 23:09:39,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:39,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:09:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:39,714 INFO L124 PetriNetUnfolderBase]: 1333/2084 cut-off events. [2024-06-27 23:09:39,715 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-27 23:09:39,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5738 conditions, 2084 events. 1333/2084 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10313 event pairs, 592 based on Foata normal form. 2/2054 useless extension candidates. Maximal degree in co-relation 5721. Up to 1980 conditions per place. [2024-06-27 23:09:39,726 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 42 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2024-06-27 23:09:39,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 336 flow [2024-06-27 23:09:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:09:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:09:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 23:09:39,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-27 23:09:39,728 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 101 transitions. [2024-06-27 23:09:39,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 336 flow [2024-06-27 23:09:39,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 307 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:09:39,730 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 218 flow [2024-06-27 23:09:39,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 23:09:39,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-27 23:09:39,731 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 218 flow [2024-06-27 23:09:39,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 23:09:39,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:39,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:39,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:09:39,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:39,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1588063522, now seen corresponding path program 1 times [2024-06-27 23:09:39,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:39,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040935083] [2024-06-27 23:09:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:39,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:40,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:40,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040935083] [2024-06-27 23:09:40,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040935083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:40,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:40,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:09:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304502006] [2024-06-27 23:09:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:40,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:09:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:09:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:09:40,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:09:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:40,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:40,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:09:40,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:41,486 INFO L124 PetriNetUnfolderBase]: 1323/2106 cut-off events. [2024-06-27 23:09:41,486 INFO L125 PetriNetUnfolderBase]: For 3098/3098 co-relation queries the response was YES. [2024-06-27 23:09:41,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6185 conditions, 2106 events. 1323/2106 cut-off events. For 3098/3098 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10640 event pairs, 556 based on Foata normal form. 4/2100 useless extension candidates. Maximal degree in co-relation 6164. Up to 1948 conditions per place. [2024-06-27 23:09:41,494 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 47 selfloop transitions, 13 changer transitions 0/66 dead transitions. [2024-06-27 23:09:41,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 394 flow [2024-06-27 23:09:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:09:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:09:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 23:09:41,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:09:41,496 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 218 flow. Second operand 6 states and 120 transitions. [2024-06-27 23:09:41,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 394 flow [2024-06-27 23:09:41,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:09:41,499 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 262 flow [2024-06-27 23:09:41,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-27 23:09:41,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 23:09:41,500 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 262 flow [2024-06-27 23:09:41,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:41,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:41,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:41,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:09:41,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:41,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1972022243, now seen corresponding path program 1 times [2024-06-27 23:09:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:41,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137433839] [2024-06-27 23:09:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:41,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:42,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:42,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137433839] [2024-06-27 23:09:42,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137433839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:42,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:42,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:09:42,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300274692] [2024-06-27 23:09:42,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:42,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:09:42,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:09:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:09:42,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:42,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:42,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:42,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:42,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:43,272 INFO L124 PetriNetUnfolderBase]: 1569/2378 cut-off events. [2024-06-27 23:09:43,273 INFO L125 PetriNetUnfolderBase]: For 5295/5299 co-relation queries the response was YES. [2024-06-27 23:09:43,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7729 conditions, 2378 events. 1569/2378 cut-off events. For 5295/5299 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11415 event pairs, 661 based on Foata normal form. 6/2381 useless extension candidates. Maximal degree in co-relation 7705. Up to 2269 conditions per place. [2024-06-27 23:09:43,290 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2024-06-27 23:09:43,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 592 flow [2024-06-27 23:09:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:09:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:09:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 23:09:43,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 23:09:43,293 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 262 flow. Second operand 6 states and 123 transitions. [2024-06-27 23:09:43,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 592 flow [2024-06-27 23:09:43,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 562 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:43,300 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 396 flow [2024-06-27 23:09:43,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-06-27 23:09:43,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 23:09:43,303 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 396 flow [2024-06-27 23:09:43,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:43,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:43,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:43,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:09:43,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:43,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1965385763, now seen corresponding path program 2 times [2024-06-27 23:09:43,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:43,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368222721] [2024-06-27 23:09:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:43,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:44,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:44,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368222721] [2024-06-27 23:09:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368222721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:44,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:09:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559195611] [2024-06-27 23:09:44,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:44,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:09:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:09:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:09:44,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:44,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:44,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:44,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:44,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:45,076 INFO L124 PetriNetUnfolderBase]: 1564/2371 cut-off events. [2024-06-27 23:09:45,077 INFO L125 PetriNetUnfolderBase]: For 7140/7142 co-relation queries the response was YES. [2024-06-27 23:09:45,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8312 conditions, 2371 events. 1564/2371 cut-off events. For 7140/7142 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11364 event pairs, 658 based on Foata normal form. 4/2371 useless extension candidates. Maximal degree in co-relation 8284. Up to 2264 conditions per place. [2024-06-27 23:09:45,111 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 51 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-06-27 23:09:45,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 612 flow [2024-06-27 23:09:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:09:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:09:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 23:09:45,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 23:09:45,113 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 396 flow. Second operand 6 states and 119 transitions. [2024-06-27 23:09:45,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 612 flow [2024-06-27 23:09:45,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 592 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 23:09:45,119 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 436 flow [2024-06-27 23:09:45,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 23:09:45,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-27 23:09:45,121 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 436 flow [2024-06-27 23:09:45,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:45,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:45,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:45,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:09:45,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:45,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1258465479, now seen corresponding path program 3 times [2024-06-27 23:09:45,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:45,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638943408] [2024-06-27 23:09:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:45,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:45,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638943408] [2024-06-27 23:09:45,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638943408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:45,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:45,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:09:45,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665275598] [2024-06-27 23:09:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:45,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:09:45,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:09:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:09:45,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:45,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 436 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:45,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:45,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:45,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:46,418 INFO L124 PetriNetUnfolderBase]: 1587/2406 cut-off events. [2024-06-27 23:09:46,419 INFO L125 PetriNetUnfolderBase]: For 8566/8572 co-relation queries the response was YES. [2024-06-27 23:09:46,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8668 conditions, 2406 events. 1587/2406 cut-off events. For 8566/8572 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11545 event pairs, 656 based on Foata normal form. 8/2412 useless extension candidates. Maximal degree in co-relation 8635. Up to 2288 conditions per place. [2024-06-27 23:09:46,430 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 36 changer transitions 0/98 dead transitions. [2024-06-27 23:09:46,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 795 flow [2024-06-27 23:09:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:09:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:09:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 23:09:46,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-27 23:09:46,432 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 436 flow. Second operand 6 states and 127 transitions. [2024-06-27 23:09:46,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 795 flow [2024-06-27 23:09:46,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 720 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:09:46,442 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 596 flow [2024-06-27 23:09:46,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=596, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-27 23:09:46,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-27 23:09:46,444 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 596 flow [2024-06-27 23:09:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:46,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:46,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:46,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:09:46,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:46,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1314914589, now seen corresponding path program 1 times [2024-06-27 23:09:46,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:46,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89150170] [2024-06-27 23:09:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:46,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:47,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:47,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89150170] [2024-06-27 23:09:47,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89150170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:47,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:47,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:09:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433948949] [2024-06-27 23:09:47,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:47,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:09:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:47,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:09:47,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:09:47,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:47,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:47,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:47,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:47,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:48,424 INFO L124 PetriNetUnfolderBase]: 1610/2436 cut-off events. [2024-06-27 23:09:48,424 INFO L125 PetriNetUnfolderBase]: For 10509/10509 co-relation queries the response was YES. [2024-06-27 23:09:48,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9092 conditions, 2436 events. 1610/2436 cut-off events. For 10509/10509 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11697 event pairs, 678 based on Foata normal form. 2/2434 useless extension candidates. Maximal degree in co-relation 9057. Up to 2329 conditions per place. [2024-06-27 23:09:48,438 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-27 23:09:48,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 910 flow [2024-06-27 23:09:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:09:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:09:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 23:09:48,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 23:09:48,440 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 596 flow. Second operand 7 states and 137 transitions. [2024-06-27 23:09:48,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 910 flow [2024-06-27 23:09:48,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 853 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 23:09:48,451 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 660 flow [2024-06-27 23:09:48,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2024-06-27 23:09:48,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 23:09:48,452 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 660 flow [2024-06-27 23:09:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:48,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:48,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:09:48,453 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:48,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash 526497659, now seen corresponding path program 2 times [2024-06-27 23:09:48,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:48,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001110541] [2024-06-27 23:09:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:49,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001110541] [2024-06-27 23:09:49,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001110541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:49,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:49,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:09:49,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688854871] [2024-06-27 23:09:49,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:49,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:09:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:09:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:09:49,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:49,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 660 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:49,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:49,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:50,392 INFO L124 PetriNetUnfolderBase]: 1637/2483 cut-off events. [2024-06-27 23:09:50,393 INFO L125 PetriNetUnfolderBase]: For 13440/13444 co-relation queries the response was YES. [2024-06-27 23:09:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9821 conditions, 2483 events. 1637/2483 cut-off events. For 13440/13444 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12012 event pairs, 690 based on Foata normal form. 6/2485 useless extension candidates. Maximal degree in co-relation 9784. Up to 2278 conditions per place. [2024-06-27 23:09:50,408 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 48 changer transitions 0/119 dead transitions. [2024-06-27 23:09:50,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 1122 flow [2024-06-27 23:09:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:09:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:09:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 23:09:50,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 23:09:50,410 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 660 flow. Second operand 7 states and 144 transitions. [2024-06-27 23:09:50,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 1122 flow [2024-06-27 23:09:50,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1068 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 23:09:50,421 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 808 flow [2024-06-27 23:09:50,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=808, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2024-06-27 23:09:50,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 23:09:50,422 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 808 flow [2024-06-27 23:09:50,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:50,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:50,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:50,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:09:50,423 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:50,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1003145907, now seen corresponding path program 1 times [2024-06-27 23:09:50,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:50,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332168590] [2024-06-27 23:09:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:50,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:51,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332168590] [2024-06-27 23:09:51,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332168590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:51,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:51,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:09:51,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339345817] [2024-06-27 23:09:51,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:51,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:09:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:09:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:09:51,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:51,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 808 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:51,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:51,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:51,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:52,312 INFO L124 PetriNetUnfolderBase]: 1691/2582 cut-off events. [2024-06-27 23:09:52,313 INFO L125 PetriNetUnfolderBase]: For 17400/17408 co-relation queries the response was YES. [2024-06-27 23:09:52,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10733 conditions, 2582 events. 1691/2582 cut-off events. For 17400/17408 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12572 event pairs, 593 based on Foata normal form. 8/2587 useless extension candidates. Maximal degree in co-relation 10694. Up to 2336 conditions per place. [2024-06-27 23:09:52,329 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 44 changer transitions 0/130 dead transitions. [2024-06-27 23:09:52,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1290 flow [2024-06-27 23:09:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:09:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:09:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 23:09:52,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-27 23:09:52,331 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 808 flow. Second operand 7 states and 145 transitions. [2024-06-27 23:09:52,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1290 flow [2024-06-27 23:09:52,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 1261 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 23:09:52,388 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 961 flow [2024-06-27 23:09:52,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=961, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-06-27 23:09:52,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-27 23:09:52,389 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 961 flow [2024-06-27 23:09:52,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:52,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:52,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:52,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:09:52,390 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:52,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash -802540257, now seen corresponding path program 2 times [2024-06-27 23:09:52,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:52,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648594930] [2024-06-27 23:09:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648594930] [2024-06-27 23:09:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648594930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:09:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165231458] [2024-06-27 23:09:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:09:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:09:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:09:53,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:53,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 961 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:53,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:53,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:53,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:54,265 INFO L124 PetriNetUnfolderBase]: 1713/2618 cut-off events. [2024-06-27 23:09:54,265 INFO L125 PetriNetUnfolderBase]: For 21012/21016 co-relation queries the response was YES. [2024-06-27 23:09:54,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 2618 events. 1713/2618 cut-off events. For 21012/21016 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12790 event pairs, 575 based on Foata normal form. 8/2623 useless extension candidates. Maximal degree in co-relation 11516. Up to 2355 conditions per place. [2024-06-27 23:09:54,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 51 changer transitions 0/130 dead transitions. [2024-06-27 23:09:54,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 1355 flow [2024-06-27 23:09:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:09:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:09:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:09:54,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-27 23:09:54,293 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 961 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:09:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 1355 flow [2024-06-27 23:09:54,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1284 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:54,311 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 1032 flow [2024-06-27 23:09:54,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1032, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-27 23:09:54,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 23:09:54,312 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 1032 flow [2024-06-27 23:09:54,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:54,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:54,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:09:54,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:54,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1415456931, now seen corresponding path program 3 times [2024-06-27 23:09:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306286354] [2024-06-27 23:09:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:55,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306286354] [2024-06-27 23:09:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306286354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:55,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:55,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:09:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475395151] [2024-06-27 23:09:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:55,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:09:55,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:09:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:09:55,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:55,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 1032 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:55,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:55,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:55,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:56,171 INFO L124 PetriNetUnfolderBase]: 1703/2604 cut-off events. [2024-06-27 23:09:56,172 INFO L125 PetriNetUnfolderBase]: For 23871/23875 co-relation queries the response was YES. [2024-06-27 23:09:56,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11830 conditions, 2604 events. 1703/2604 cut-off events. For 23871/23875 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12684 event pairs, 573 based on Foata normal form. 8/2609 useless extension candidates. Maximal degree in co-relation 11786. Up to 2347 conditions per place. [2024-06-27 23:09:56,187 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 47 changer transitions 0/132 dead transitions. [2024-06-27 23:09:56,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 132 transitions, 1410 flow [2024-06-27 23:09:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:09:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:09:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 23:09:56,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-27 23:09:56,188 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 1032 flow. Second operand 7 states and 141 transitions. [2024-06-27 23:09:56,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 132 transitions, 1410 flow [2024-06-27 23:09:56,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 132 transitions, 1325 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 23:09:56,207 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 1050 flow [2024-06-27 23:09:56,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1050, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-27 23:09:56,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 23:09:56,208 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 1050 flow [2024-06-27 23:09:56,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:56,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:56,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:56,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:09:56,209 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:56,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1415456745, now seen corresponding path program 3 times [2024-06-27 23:09:56,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:56,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772034653] [2024-06-27 23:09:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:56,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:57,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772034653] [2024-06-27 23:09:57,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772034653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:57,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:57,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:09:57,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052384315] [2024-06-27 23:09:57,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:57,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:09:57,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:57,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:09:57,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:09:57,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:57,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 1050 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:57,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:57,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:57,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:57,936 INFO L124 PetriNetUnfolderBase]: 1698/2592 cut-off events. [2024-06-27 23:09:57,954 INFO L125 PetriNetUnfolderBase]: For 26568/26568 co-relation queries the response was YES. [2024-06-27 23:09:57,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11977 conditions, 2592 events. 1698/2592 cut-off events. For 26568/26568 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12628 event pairs, 620 based on Foata normal form. 2/2590 useless extension candidates. Maximal degree in co-relation 11931. Up to 2369 conditions per place. [2024-06-27 23:09:57,990 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 49 changer transitions 0/128 dead transitions. [2024-06-27 23:09:57,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 128 transitions, 1414 flow [2024-06-27 23:09:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:09:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:09:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:09:57,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-27 23:09:57,992 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 1050 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:09:57,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 128 transitions, 1414 flow [2024-06-27 23:09:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 1318 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:58,016 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 1061 flow [2024-06-27 23:09:58,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1061, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-06-27 23:09:58,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 23:09:58,017 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 1061 flow [2024-06-27 23:09:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:58,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:58,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:58,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:09:58,018 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:58,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:58,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1023499379, now seen corresponding path program 4 times [2024-06-27 23:09:58,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:58,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472668855] [2024-06-27 23:09:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:58,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:58,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:58,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472668855] [2024-06-27 23:09:58,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472668855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:58,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:58,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:09:58,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159103419] [2024-06-27 23:09:58,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:58,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:09:58,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:09:58,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:09:58,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:09:58,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 1061 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:58,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:58,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:09:58,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:59,576 INFO L124 PetriNetUnfolderBase]: 1768/2694 cut-off events. [2024-06-27 23:09:59,576 INFO L125 PetriNetUnfolderBase]: For 30083/30085 co-relation queries the response was YES. [2024-06-27 23:09:59,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 2694 events. 1768/2694 cut-off events. For 30083/30085 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13095 event pairs, 659 based on Foata normal form. 4/2696 useless extension candidates. Maximal degree in co-relation 12700. Up to 2521 conditions per place. [2024-06-27 23:09:59,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 49 changer transitions 0/165 dead transitions. [2024-06-27 23:09:59,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1802 flow [2024-06-27 23:09:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:09:59,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 23:09:59,593 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 1061 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:09:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1802 flow [2024-06-27 23:09:59,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 165 transitions, 1657 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:09:59,615 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1291 flow [2024-06-27 23:09:59,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1291, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-27 23:09:59,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 23:09:59,616 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1291 flow [2024-06-27 23:09:59,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:09:59,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:59,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:59,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:09:59,617 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 23:09:59,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1087965083, now seen corresponding path program 5 times [2024-06-27 23:09:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:59,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902344068] [2024-06-27 23:09:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:00,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902344068] [2024-06-27 23:10:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902344068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:00,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:00,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:10:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122077958] [2024-06-27 23:10:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:00,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:10:00,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:10:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:10:00,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:00,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1291 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:10:00,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:00,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:00,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:01,346 INFO L124 PetriNetUnfolderBase]: 1788/2727 cut-off events. [2024-06-27 23:10:01,346 INFO L125 PetriNetUnfolderBase]: For 33721/33723 co-relation queries the response was YES. [2024-06-27 23:10:01,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13185 conditions, 2727 events. 1788/2727 cut-off events. For 33721/33723 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13321 event pairs, 659 based on Foata normal form. 5/2730 useless extension candidates. Maximal degree in co-relation 13135. Up to 2564 conditions per place. [2024-06-27 23:10:01,361 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 48 changer transitions 0/168 dead transitions. [2024-06-27 23:10:01,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 168 transitions, 1855 flow [2024-06-27 23:10:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:10:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:10:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 23:10:01,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 23:10:01,368 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1291 flow. Second operand 7 states and 144 transitions. [2024-06-27 23:10:01,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 168 transitions, 1855 flow [2024-06-27 23:10:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 168 transitions, 1729 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 23:10:01,409 INFO L231 Difference]: Finished difference. Result has 106 places, 144 transitions, 1465 flow [2024-06-27 23:10:01,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1465, PETRI_PLACES=106, PETRI_TRANSITIONS=144} [2024-06-27 23:10:01,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 23:10:01,410 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 144 transitions, 1465 flow [2024-06-27 23:10:01,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:10:01,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:01,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:01,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:10:01,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:01,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1087845113, now seen corresponding path program 6 times [2024-06-27 23:10:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:01,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598954335] [2024-06-27 23:10:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:02,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:02,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598954335] [2024-06-27 23:10:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598954335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:02,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:02,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:10:02,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380403248] [2024-06-27 23:10:02,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:02,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:10:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:10:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:10:02,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:02,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 144 transitions, 1465 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:10:02,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:02,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:02,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:03,002 INFO L124 PetriNetUnfolderBase]: 1804/2767 cut-off events. [2024-06-27 23:10:03,002 INFO L125 PetriNetUnfolderBase]: For 36968/36974 co-relation queries the response was YES. [2024-06-27 23:10:03,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13574 conditions, 2767 events. 1804/2767 cut-off events. For 36968/36974 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13658 event pairs, 619 based on Foata normal form. 8/2773 useless extension candidates. Maximal degree in co-relation 13522. Up to 2475 conditions per place. [2024-06-27 23:10:03,036 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 93 changer transitions 0/179 dead transitions. [2024-06-27 23:10:03,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 179 transitions, 1965 flow [2024-06-27 23:10:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:10:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:10:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 23:10:03,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:10:03,042 INFO L175 Difference]: Start difference. First operand has 106 places, 144 transitions, 1465 flow. Second operand 7 states and 147 transitions. [2024-06-27 23:10:03,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 179 transitions, 1965 flow [2024-06-27 23:10:03,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 179 transitions, 1856 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 23:10:03,079 INFO L231 Difference]: Finished difference. Result has 111 places, 155 transitions, 1649 flow [2024-06-27 23:10:03,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1649, PETRI_PLACES=111, PETRI_TRANSITIONS=155} [2024-06-27 23:10:03,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-27 23:10:03,086 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 155 transitions, 1649 flow [2024-06-27 23:10:03,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:10:03,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:03,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:03,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:10:03,087 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:03,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1087844927, now seen corresponding path program 4 times [2024-06-27 23:10:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117502121] [2024-06-27 23:10:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:03,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:04,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:04,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117502121] [2024-06-27 23:10:04,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117502121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:04,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:04,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:10:04,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220619098] [2024-06-27 23:10:04,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:04,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:10:04,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:04,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:10:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:10:04,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:04,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 155 transitions, 1649 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:10:04,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:04,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:04,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:04,793 INFO L124 PetriNetUnfolderBase]: 1850/2844 cut-off events. [2024-06-27 23:10:04,793 INFO L125 PetriNetUnfolderBase]: For 40712/40718 co-relation queries the response was YES. [2024-06-27 23:10:04,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14190 conditions, 2844 events. 1850/2844 cut-off events. For 40712/40718 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14161 event pairs, 636 based on Foata normal form. 7/2849 useless extension candidates. Maximal degree in co-relation 14136. Up to 2537 conditions per place. [2024-06-27 23:10:04,809 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 60 changer transitions 0/196 dead transitions. [2024-06-27 23:10:04,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 196 transitions, 2220 flow [2024-06-27 23:10:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:10:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:10:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 23:10:04,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2024-06-27 23:10:04,811 INFO L175 Difference]: Start difference. First operand has 111 places, 155 transitions, 1649 flow. Second operand 7 states and 151 transitions. [2024-06-27 23:10:04,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 196 transitions, 2220 flow [2024-06-27 23:10:04,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 196 transitions, 1946 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:04,837 INFO L231 Difference]: Finished difference. Result has 113 places, 168 transitions, 1626 flow [2024-06-27 23:10:04,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1626, PETRI_PLACES=113, PETRI_TRANSITIONS=168} [2024-06-27 23:10:04,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-27 23:10:04,838 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 168 transitions, 1626 flow [2024-06-27 23:10:04,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:10:04,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:04,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:04,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:10:04,839 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:04,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash 487670256, now seen corresponding path program 1 times [2024-06-27 23:10:04,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:04,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048948969] [2024-06-27 23:10:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:04,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:05,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:05,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048948969] [2024-06-27 23:10:05,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048948969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:05,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:05,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:10:05,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983390044] [2024-06-27 23:10:05,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:05,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:10:05,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:05,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:10:05,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:10:05,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:10:05,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 168 transitions, 1626 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 23:10:05,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:05,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:10:05,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:06,319 INFO L124 PetriNetUnfolderBase]: 1557/2514 cut-off events. [2024-06-27 23:10:06,319 INFO L125 PetriNetUnfolderBase]: For 42449/42458 co-relation queries the response was YES. [2024-06-27 23:10:06,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12549 conditions, 2514 events. 1557/2514 cut-off events. For 42449/42458 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13464 event pairs, 690 based on Foata normal form. 7/2508 useless extension candidates. Maximal degree in co-relation 12496. Up to 2273 conditions per place. [2024-06-27 23:10:06,336 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 122 selfloop transitions, 10 changer transitions 0/178 dead transitions. [2024-06-27 23:10:06,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 178 transitions, 1934 flow [2024-06-27 23:10:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:10:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:10:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 23:10:06,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-27 23:10:06,338 INFO L175 Difference]: Start difference. First operand has 113 places, 168 transitions, 1626 flow. Second operand 6 states and 113 transitions. [2024-06-27 23:10:06,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 178 transitions, 1934 flow [2024-06-27 23:10:06,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 178 transitions, 1790 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:06,369 INFO L231 Difference]: Finished difference. Result has 114 places, 171 transitions, 1532 flow [2024-06-27 23:10:06,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1532, PETRI_PLACES=114, PETRI_TRANSITIONS=171} [2024-06-27 23:10:06,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 23:10:06,370 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 171 transitions, 1532 flow [2024-06-27 23:10:06,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 23:10:06,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:06,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:06,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:10:06,371 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:06,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash -270341277, now seen corresponding path program 1 times [2024-06-27 23:10:06,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:06,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573839949] [2024-06-27 23:10:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:06,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:07,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:07,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573839949] [2024-06-27 23:10:07,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573839949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:07,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:07,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886249882] [2024-06-27 23:10:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:07,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:07,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 171 transitions, 1532 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:07,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:07,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:07,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:08,578 INFO L124 PetriNetUnfolderBase]: 1869/2879 cut-off events. [2024-06-27 23:10:08,579 INFO L125 PetriNetUnfolderBase]: For 47453/47453 co-relation queries the response was YES. [2024-06-27 23:10:08,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14583 conditions, 2879 events. 1869/2879 cut-off events. For 47453/47453 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 14322 event pairs, 564 based on Foata normal form. 4/2879 useless extension candidates. Maximal degree in co-relation 14530. Up to 2654 conditions per place. [2024-06-27 23:10:08,597 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 141 selfloop transitions, 50 changer transitions 0/196 dead transitions. [2024-06-27 23:10:08,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 196 transitions, 2024 flow [2024-06-27 23:10:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:10:08,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:10:08,599 INFO L175 Difference]: Start difference. First operand has 114 places, 171 transitions, 1532 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:10:08,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 196 transitions, 2024 flow [2024-06-27 23:10:08,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 196 transitions, 1996 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:10:08,633 INFO L231 Difference]: Finished difference. Result has 119 places, 174 transitions, 1655 flow [2024-06-27 23:10:08,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=119, PETRI_TRANSITIONS=174} [2024-06-27 23:10:08,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-27 23:10:08,634 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 174 transitions, 1655 flow [2024-06-27 23:10:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:08,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:08,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:08,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:10:08,635 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:08,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash -266622207, now seen corresponding path program 2 times [2024-06-27 23:10:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:08,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065176839] [2024-06-27 23:10:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:08,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:09,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:09,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065176839] [2024-06-27 23:10:09,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065176839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:09,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:09,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685049525] [2024-06-27 23:10:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:09,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:09,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:09,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 174 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:09,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:09,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:09,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:10,727 INFO L124 PetriNetUnfolderBase]: 1955/3027 cut-off events. [2024-06-27 23:10:10,728 INFO L125 PetriNetUnfolderBase]: For 55102/55104 co-relation queries the response was YES. [2024-06-27 23:10:10,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16084 conditions, 3027 events. 1955/3027 cut-off events. For 55102/55104 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15431 event pairs, 584 based on Foata normal form. 4/3027 useless extension candidates. Maximal degree in co-relation 16030. Up to 2360 conditions per place. [2024-06-27 23:10:10,744 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 107 changer transitions 0/223 dead transitions. [2024-06-27 23:10:10,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 223 transitions, 2638 flow [2024-06-27 23:10:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 23:10:10,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 23:10:10,746 INFO L175 Difference]: Start difference. First operand has 119 places, 174 transitions, 1655 flow. Second operand 8 states and 172 transitions. [2024-06-27 23:10:10,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 223 transitions, 2638 flow [2024-06-27 23:10:10,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 223 transitions, 2515 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:10,791 INFO L231 Difference]: Finished difference. Result has 120 places, 186 transitions, 1924 flow [2024-06-27 23:10:10,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1924, PETRI_PLACES=120, PETRI_TRANSITIONS=186} [2024-06-27 23:10:10,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 23:10:10,792 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 186 transitions, 1924 flow [2024-06-27 23:10:10,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:10,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:10,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:10,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:10:10,793 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:10,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash -266616627, now seen corresponding path program 3 times [2024-06-27 23:10:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145228092] [2024-06-27 23:10:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145228092] [2024-06-27 23:10:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145228092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:12,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:12,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:12,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307591933] [2024-06-27 23:10:12,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:12,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:12,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:12,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 186 transitions, 1924 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:12,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:12,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:12,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:13,072 INFO L124 PetriNetUnfolderBase]: 1945/2999 cut-off events. [2024-06-27 23:10:13,072 INFO L125 PetriNetUnfolderBase]: For 60776/60778 co-relation queries the response was YES. [2024-06-27 23:10:13,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16625 conditions, 2999 events. 1945/2999 cut-off events. For 60776/60778 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15120 event pairs, 494 based on Foata normal form. 4/2999 useless extension candidates. Maximal degree in co-relation 16570. Up to 2352 conditions per place. [2024-06-27 23:10:13,092 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 103 selfloop transitions, 111 changer transitions 0/219 dead transitions. [2024-06-27 23:10:13,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 219 transitions, 2653 flow [2024-06-27 23:10:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:10:13,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:10:13,093 INFO L175 Difference]: Start difference. First operand has 120 places, 186 transitions, 1924 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:10:13,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 219 transitions, 2653 flow [2024-06-27 23:10:13,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 219 transitions, 2571 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 23:10:13,140 INFO L231 Difference]: Finished difference. Result has 126 places, 186 transitions, 2076 flow [2024-06-27 23:10:13,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=126, PETRI_TRANSITIONS=186} [2024-06-27 23:10:13,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 23:10:13,140 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 186 transitions, 2076 flow [2024-06-27 23:10:13,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:13,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:13,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:10:13,141 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:13,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash 891057105, now seen corresponding path program 4 times [2024-06-27 23:10:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:13,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406964172] [2024-06-27 23:10:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:14,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:14,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406964172] [2024-06-27 23:10:14,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406964172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:14,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:14,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858938159] [2024-06-27 23:10:14,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:14,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:14,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:14,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:14,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 186 transitions, 2076 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:14,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:14,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:14,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:15,433 INFO L124 PetriNetUnfolderBase]: 1967/3040 cut-off events. [2024-06-27 23:10:15,434 INFO L125 PetriNetUnfolderBase]: For 67009/67009 co-relation queries the response was YES. [2024-06-27 23:10:15,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17364 conditions, 3040 events. 1967/3040 cut-off events. For 67009/67009 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15370 event pairs, 469 based on Foata normal form. 4/3039 useless extension candidates. Maximal degree in co-relation 17305. Up to 2371 conditions per place. [2024-06-27 23:10:15,453 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 84 selfloop transitions, 127 changer transitions 0/216 dead transitions. [2024-06-27 23:10:15,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 216 transitions, 2739 flow [2024-06-27 23:10:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:10:15,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 23:10:15,455 INFO L175 Difference]: Start difference. First operand has 126 places, 186 transitions, 2076 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:10:15,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 216 transitions, 2739 flow [2024-06-27 23:10:15,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 216 transitions, 2530 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:15,507 INFO L231 Difference]: Finished difference. Result has 129 places, 189 transitions, 2184 flow [2024-06-27 23:10:15,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2184, PETRI_PLACES=129, PETRI_TRANSITIONS=189} [2024-06-27 23:10:15,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 23:10:15,508 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 189 transitions, 2184 flow [2024-06-27 23:10:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:15,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:15,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:15,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:10:15,509 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 23:10:15,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1691728843, now seen corresponding path program 5 times [2024-06-27 23:10:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947659907] [2024-06-27 23:10:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:16,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:16,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947659907] [2024-06-27 23:10:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947659907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:16,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742701656] [2024-06-27 23:10:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:16,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:16,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 189 transitions, 2184 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:16,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:16,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:16,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:17,638 INFO L124 PetriNetUnfolderBase]: 1989/3077 cut-off events. [2024-06-27 23:10:17,639 INFO L125 PetriNetUnfolderBase]: For 72472/72472 co-relation queries the response was YES. [2024-06-27 23:10:17,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17895 conditions, 3077 events. 1989/3077 cut-off events. For 72472/72472 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15591 event pairs, 464 based on Foata normal form. 4/3076 useless extension candidates. Maximal degree in co-relation 17833. Up to 2390 conditions per place. [2024-06-27 23:10:17,662 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 107 selfloop transitions, 114 changer transitions 0/226 dead transitions. [2024-06-27 23:10:17,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 226 transitions, 3008 flow [2024-06-27 23:10:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 23:10:17,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-27 23:10:17,663 INFO L175 Difference]: Start difference. First operand has 129 places, 189 transitions, 2184 flow. Second operand 8 states and 166 transitions. [2024-06-27 23:10:17,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 226 transitions, 3008 flow [2024-06-27 23:10:17,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 226 transitions, 2771 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:17,729 INFO L231 Difference]: Finished difference. Result has 132 places, 192 transitions, 2238 flow [2024-06-27 23:10:17,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2238, PETRI_PLACES=132, PETRI_TRANSITIONS=192} [2024-06-27 23:10:17,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 23:10:17,730 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 192 transitions, 2238 flow [2024-06-27 23:10:17,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:17,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:17,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:10:17,730 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:17,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 929487617, now seen corresponding path program 6 times [2024-06-27 23:10:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:17,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001583621] [2024-06-27 23:10:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:18,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:18,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001583621] [2024-06-27 23:10:18,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001583621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:18,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:18,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:18,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156185463] [2024-06-27 23:10:18,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:18,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:18,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:18,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:18,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:19,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:19,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 192 transitions, 2238 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:19,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:19,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:19,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:19,856 INFO L124 PetriNetUnfolderBase]: 1979/3063 cut-off events. [2024-06-27 23:10:19,856 INFO L125 PetriNetUnfolderBase]: For 76630/76630 co-relation queries the response was YES. [2024-06-27 23:10:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17866 conditions, 3063 events. 1979/3063 cut-off events. For 76630/76630 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15493 event pairs, 462 based on Foata normal form. 4/3062 useless extension candidates. Maximal degree in co-relation 17801. Up to 2382 conditions per place. [2024-06-27 23:10:19,877 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 116 changer transitions 0/222 dead transitions. [2024-06-27 23:10:19,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 222 transitions, 2895 flow [2024-06-27 23:10:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:10:19,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 23:10:19,879 INFO L175 Difference]: Start difference. First operand has 132 places, 192 transitions, 2238 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:10:19,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 222 transitions, 2895 flow [2024-06-27 23:10:19,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 222 transitions, 2713 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 23:10:19,946 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 2299 flow [2024-06-27 23:10:19,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2299, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-06-27 23:10:19,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 23:10:19,947 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 2299 flow [2024-06-27 23:10:19,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:19,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:19,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:19,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:10:19,948 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:19,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:19,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1663708195, now seen corresponding path program 7 times [2024-06-27 23:10:19,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:19,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513039561] [2024-06-27 23:10:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:19,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:20,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:20,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513039561] [2024-06-27 23:10:20,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513039561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:20,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:20,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:20,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029643427] [2024-06-27 23:10:20,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:20,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:20,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:20,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:20,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:20,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 2299 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:20,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:20,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:20,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:21,824 INFO L124 PetriNetUnfolderBase]: 2081/3243 cut-off events. [2024-06-27 23:10:21,825 INFO L125 PetriNetUnfolderBase]: For 86565/86567 co-relation queries the response was YES. [2024-06-27 23:10:21,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19043 conditions, 3243 events. 2081/3243 cut-off events. For 86565/86567 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16793 event pairs, 580 based on Foata normal form. 6/3247 useless extension candidates. Maximal degree in co-relation 18975. Up to 2863 conditions per place. [2024-06-27 23:10:21,847 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 77 changer transitions 0/249 dead transitions. [2024-06-27 23:10:21,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 249 transitions, 3307 flow [2024-06-27 23:10:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 23:10:21,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 23:10:21,850 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 2299 flow. Second operand 10 states and 201 transitions. [2024-06-27 23:10:21,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 249 transitions, 3307 flow [2024-06-27 23:10:21,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 249 transitions, 3021 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:21,944 INFO L231 Difference]: Finished difference. Result has 142 places, 208 transitions, 2432 flow [2024-06-27 23:10:21,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2432, PETRI_PLACES=142, PETRI_TRANSITIONS=208} [2024-06-27 23:10:21,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 23:10:21,946 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 208 transitions, 2432 flow [2024-06-27 23:10:21,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:21,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:21,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:21,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:10:21,946 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:21,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash 632822277, now seen corresponding path program 8 times [2024-06-27 23:10:21,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:21,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288408470] [2024-06-27 23:10:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:21,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:23,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:23,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288408470] [2024-06-27 23:10:23,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288408470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:23,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:23,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:23,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101003925] [2024-06-27 23:10:23,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:23,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:23,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:23,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:23,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:23,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:23,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 208 transitions, 2432 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:23,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:23,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:23,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:23,930 INFO L124 PetriNetUnfolderBase]: 2093/3260 cut-off events. [2024-06-27 23:10:23,930 INFO L125 PetriNetUnfolderBase]: For 89935/89937 co-relation queries the response was YES. [2024-06-27 23:10:23,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19124 conditions, 3260 events. 2093/3260 cut-off events. For 89935/89937 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16889 event pairs, 579 based on Foata normal form. 8/3266 useless extension candidates. Maximal degree in co-relation 19054. Up to 2957 conditions per place. [2024-06-27 23:10:23,951 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 177 selfloop transitions, 60 changer transitions 0/242 dead transitions. [2024-06-27 23:10:23,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 242 transitions, 3101 flow [2024-06-27 23:10:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:10:23,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 23:10:23,953 INFO L175 Difference]: Start difference. First operand has 142 places, 208 transitions, 2432 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:10:23,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 242 transitions, 3101 flow [2024-06-27 23:10:24,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 242 transitions, 2955 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:24,038 INFO L231 Difference]: Finished difference. Result has 145 places, 214 transitions, 2530 flow [2024-06-27 23:10:24,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2312, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=145, PETRI_TRANSITIONS=214} [2024-06-27 23:10:24,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 23:10:24,039 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 214 transitions, 2530 flow [2024-06-27 23:10:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:24,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:24,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:24,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:10:24,039 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:24,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:24,040 INFO L85 PathProgramCache]: Analyzing trace with hash 636546927, now seen corresponding path program 9 times [2024-06-27 23:10:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:24,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478907883] [2024-06-27 23:10:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:25,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:25,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478907883] [2024-06-27 23:10:25,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478907883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:25,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:25,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:25,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545225569] [2024-06-27 23:10:25,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:25,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:25,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:25,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:25,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:25,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 214 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:25,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:25,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:25,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:26,075 INFO L124 PetriNetUnfolderBase]: 2213/3449 cut-off events. [2024-06-27 23:10:26,075 INFO L125 PetriNetUnfolderBase]: For 95653/95655 co-relation queries the response was YES. [2024-06-27 23:10:26,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20143 conditions, 3449 events. 2213/3449 cut-off events. For 95653/95655 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18118 event pairs, 466 based on Foata normal form. 4/3451 useless extension candidates. Maximal degree in co-relation 20071. Up to 2595 conditions per place. [2024-06-27 23:10:26,102 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 170 changer transitions 0/275 dead transitions. [2024-06-27 23:10:26,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 275 transitions, 3562 flow [2024-06-27 23:10:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 23:10:26,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 23:10:26,104 INFO L175 Difference]: Start difference. First operand has 145 places, 214 transitions, 2530 flow. Second operand 8 states and 175 transitions. [2024-06-27 23:10:26,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 275 transitions, 3562 flow [2024-06-27 23:10:26,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 275 transitions, 3450 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:26,205 INFO L231 Difference]: Finished difference. Result has 148 places, 240 transitions, 3072 flow [2024-06-27 23:10:26,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3072, PETRI_PLACES=148, PETRI_TRANSITIONS=240} [2024-06-27 23:10:26,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-27 23:10:26,206 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 240 transitions, 3072 flow [2024-06-27 23:10:26,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:26,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:26,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:26,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:10:26,206 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:26,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash 636541347, now seen corresponding path program 10 times [2024-06-27 23:10:26,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:26,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831885575] [2024-06-27 23:10:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:26,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:27,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831885575] [2024-06-27 23:10:27,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831885575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:27,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:27,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836302870] [2024-06-27 23:10:27,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:27,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:27,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:27,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:27,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 240 transitions, 3072 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:27,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:27,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:27,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:28,096 INFO L124 PetriNetUnfolderBase]: 2203/3435 cut-off events. [2024-06-27 23:10:28,097 INFO L125 PetriNetUnfolderBase]: For 102523/102525 co-relation queries the response was YES. [2024-06-27 23:10:28,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20925 conditions, 3435 events. 2203/3435 cut-off events. For 102523/102525 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18072 event pairs, 464 based on Foata normal form. 4/3437 useless extension candidates. Maximal degree in co-relation 20851. Up to 2587 conditions per place. [2024-06-27 23:10:28,121 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 105 selfloop transitions, 164 changer transitions 0/274 dead transitions. [2024-06-27 23:10:28,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 274 transitions, 3756 flow [2024-06-27 23:10:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 23:10:28,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 23:10:28,123 INFO L175 Difference]: Start difference. First operand has 148 places, 240 transitions, 3072 flow. Second operand 8 states and 175 transitions. [2024-06-27 23:10:28,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 274 transitions, 3756 flow [2024-06-27 23:10:28,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 274 transitions, 3467 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 23:10:28,229 INFO L231 Difference]: Finished difference. Result has 153 places, 240 transitions, 3133 flow [2024-06-27 23:10:28,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3133, PETRI_PLACES=153, PETRI_TRANSITIONS=240} [2024-06-27 23:10:28,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 23:10:28,230 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 240 transitions, 3133 flow [2024-06-27 23:10:28,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:28,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:28,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:28,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:10:28,231 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:28,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash 891334152, now seen corresponding path program 1 times [2024-06-27 23:10:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:28,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242767635] [2024-06-27 23:10:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242767635] [2024-06-27 23:10:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242767635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:30,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:30,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:30,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914313960] [2024-06-27 23:10:30,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:30,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:30,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:30,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:30,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 240 transitions, 3133 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:30,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:30,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:30,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:30,896 INFO L124 PetriNetUnfolderBase]: 2195/3429 cut-off events. [2024-06-27 23:10:30,897 INFO L125 PetriNetUnfolderBase]: For 108656/108656 co-relation queries the response was YES. [2024-06-27 23:10:30,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20771 conditions, 3429 events. 2195/3429 cut-off events. For 108656/108656 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18103 event pairs, 643 based on Foata normal form. 4/3431 useless extension candidates. Maximal degree in co-relation 20696. Up to 3189 conditions per place. [2024-06-27 23:10:30,922 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 245 selfloop transitions, 18 changer transitions 0/268 dead transitions. [2024-06-27 23:10:30,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 268 transitions, 3832 flow [2024-06-27 23:10:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:10:30,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:10:30,923 INFO L175 Difference]: Start difference. First operand has 153 places, 240 transitions, 3133 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:10:30,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 268 transitions, 3832 flow [2024-06-27 23:10:31,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 268 transitions, 3392 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 23:10:31,024 INFO L231 Difference]: Finished difference. Result has 155 places, 245 transitions, 2811 flow [2024-06-27 23:10:31,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2811, PETRI_PLACES=155, PETRI_TRANSITIONS=245} [2024-06-27 23:10:31,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 23:10:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 245 transitions, 2811 flow [2024-06-27 23:10:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:31,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:10:31,025 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:31,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2062090089, now seen corresponding path program 1 times [2024-06-27 23:10:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312294373] [2024-06-27 23:10:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:32,418 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 23:10:32,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:32,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312294373] [2024-06-27 23:10:32,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312294373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:32,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:32,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:10:32,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43698638] [2024-06-27 23:10:32,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:32,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:10:32,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:10:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:10:32,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:10:32,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 245 transitions, 2811 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:32,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:32,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:10:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:33,193 INFO L124 PetriNetUnfolderBase]: 2059/3265 cut-off events. [2024-06-27 23:10:33,193 INFO L125 PetriNetUnfolderBase]: For 109917/109925 co-relation queries the response was YES. [2024-06-27 23:10:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19541 conditions, 3265 events. 2059/3265 cut-off events. For 109917/109925 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17581 event pairs, 635 based on Foata normal form. 4/3249 useless extension candidates. Maximal degree in co-relation 19464. Up to 2993 conditions per place. [2024-06-27 23:10:33,214 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 13 changer transitions 0/256 dead transitions. [2024-06-27 23:10:33,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 256 transitions, 3323 flow [2024-06-27 23:10:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:10:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:10:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 23:10:33,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 23:10:33,215 INFO L175 Difference]: Start difference. First operand has 155 places, 245 transitions, 2811 flow. Second operand 7 states and 123 transitions. [2024-06-27 23:10:33,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 256 transitions, 3323 flow [2024-06-27 23:10:33,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 256 transitions, 3159 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:33,329 INFO L231 Difference]: Finished difference. Result has 155 places, 248 transitions, 2709 flow [2024-06-27 23:10:33,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2709, PETRI_PLACES=155, PETRI_TRANSITIONS=248} [2024-06-27 23:10:33,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 23:10:33,330 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 248 transitions, 2709 flow [2024-06-27 23:10:33,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:33,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:33,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:33,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:10:33,330 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:33,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1502947444, now seen corresponding path program 1 times [2024-06-27 23:10:33,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:33,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956101309] [2024-06-27 23:10:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:33,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:34,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:34,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956101309] [2024-06-27 23:10:34,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956101309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:34,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:34,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:34,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873494342] [2024-06-27 23:10:34,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:34,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:34,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:34,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:34,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:34,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 248 transitions, 2709 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:34,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:34,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:34,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:35,726 INFO L124 PetriNetUnfolderBase]: 2209/3452 cut-off events. [2024-06-27 23:10:35,727 INFO L125 PetriNetUnfolderBase]: For 115472/115472 co-relation queries the response was YES. [2024-06-27 23:10:35,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20894 conditions, 3452 events. 2209/3452 cut-off events. For 115472/115472 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18153 event pairs, 576 based on Foata normal form. 4/3452 useless extension candidates. Maximal degree in co-relation 20817. Up to 3147 conditions per place. [2024-06-27 23:10:35,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 49 changer transitions 0/272 dead transitions. [2024-06-27 23:10:35,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 272 transitions, 3359 flow [2024-06-27 23:10:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:10:35,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:10:35,756 INFO L175 Difference]: Start difference. First operand has 155 places, 248 transitions, 2709 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:10:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 272 transitions, 3359 flow [2024-06-27 23:10:35,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 272 transitions, 3319 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:35,863 INFO L231 Difference]: Finished difference. Result has 159 places, 250 transitions, 2817 flow [2024-06-27 23:10:35,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2817, PETRI_PLACES=159, PETRI_TRANSITIONS=250} [2024-06-27 23:10:35,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 23:10:35,865 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 250 transitions, 2817 flow [2024-06-27 23:10:35,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:35,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:35,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:10:35,865 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:35,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash 206494598, now seen corresponding path program 2 times [2024-06-27 23:10:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:35,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130994942] [2024-06-27 23:10:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:35,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130994942] [2024-06-27 23:10:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130994942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:37,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:37,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478864186] [2024-06-27 23:10:37,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:37,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:37,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 250 transitions, 2817 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:37,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:37,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:37,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:38,203 INFO L124 PetriNetUnfolderBase]: 2244/3519 cut-off events. [2024-06-27 23:10:38,203 INFO L125 PetriNetUnfolderBase]: For 123358/123358 co-relation queries the response was YES. [2024-06-27 23:10:38,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 3519 events. 2244/3519 cut-off events. For 123358/123358 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18783 event pairs, 564 based on Foata normal form. 4/3519 useless extension candidates. Maximal degree in co-relation 21570. Up to 3153 conditions per place. [2024-06-27 23:10:38,236 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 53 changer transitions 0/282 dead transitions. [2024-06-27 23:10:38,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 282 transitions, 3525 flow [2024-06-27 23:10:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 23:10:38,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 23:10:38,238 INFO L175 Difference]: Start difference. First operand has 159 places, 250 transitions, 2817 flow. Second operand 10 states and 183 transitions. [2024-06-27 23:10:38,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 282 transitions, 3525 flow [2024-06-27 23:10:38,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 282 transitions, 3418 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:38,372 INFO L231 Difference]: Finished difference. Result has 164 places, 254 transitions, 2890 flow [2024-06-27 23:10:38,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2890, PETRI_PLACES=164, PETRI_TRANSITIONS=254} [2024-06-27 23:10:38,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 23:10:38,372 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 254 transitions, 2890 flow [2024-06-27 23:10:38,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:38,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:38,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:38,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:10:38,373 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:38,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash 324642728, now seen corresponding path program 3 times [2024-06-27 23:10:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40185707] [2024-06-27 23:10:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:39,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:39,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40185707] [2024-06-27 23:10:39,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40185707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:39,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:39,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88939614] [2024-06-27 23:10:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:39,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:39,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 254 transitions, 2890 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:39,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:39,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:39,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:40,691 INFO L124 PetriNetUnfolderBase]: 2261/3540 cut-off events. [2024-06-27 23:10:40,691 INFO L125 PetriNetUnfolderBase]: For 132133/132135 co-relation queries the response was YES. [2024-06-27 23:10:40,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22193 conditions, 3540 events. 2261/3540 cut-off events. For 132133/132135 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18842 event pairs, 593 based on Foata normal form. 6/3542 useless extension candidates. Maximal degree in co-relation 22113. Up to 3122 conditions per place. [2024-06-27 23:10:40,720 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 90 changer transitions 0/279 dead transitions. [2024-06-27 23:10:40,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 279 transitions, 3588 flow [2024-06-27 23:10:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:10:40,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 23:10:40,722 INFO L175 Difference]: Start difference. First operand has 164 places, 254 transitions, 2890 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:10:40,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 279 transitions, 3588 flow [2024-06-27 23:10:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 279 transitions, 3460 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:40,909 INFO L231 Difference]: Finished difference. Result has 166 places, 256 transitions, 2999 flow [2024-06-27 23:10:40,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2999, PETRI_PLACES=166, PETRI_TRANSITIONS=256} [2024-06-27 23:10:40,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 23:10:40,910 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 256 transitions, 2999 flow [2024-06-27 23:10:40,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:40,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:40,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:40,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:10:40,911 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:40,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash -870253039, now seen corresponding path program 1 times [2024-06-27 23:10:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:40,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025850805] [2024-06-27 23:10:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:41,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:41,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025850805] [2024-06-27 23:10:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025850805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:10:41,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654376761] [2024-06-27 23:10:41,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:10:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:10:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:10:41,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:10:41,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 256 transitions, 2999 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:41,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:41,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:10:41,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:42,476 INFO L124 PetriNetUnfolderBase]: 1934/3163 cut-off events. [2024-06-27 23:10:42,476 INFO L125 PetriNetUnfolderBase]: For 137087/137094 co-relation queries the response was YES. [2024-06-27 23:10:42,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20605 conditions, 3163 events. 1934/3163 cut-off events. For 137087/137094 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17879 event pairs, 541 based on Foata normal form. 2/3103 useless extension candidates. Maximal degree in co-relation 20524. Up to 2731 conditions per place. [2024-06-27 23:10:42,501 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 36 changer transitions 0/270 dead transitions. [2024-06-27 23:10:42,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 270 transitions, 3509 flow [2024-06-27 23:10:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:10:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:10:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 23:10:42,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 23:10:42,502 INFO L175 Difference]: Start difference. First operand has 166 places, 256 transitions, 2999 flow. Second operand 7 states and 135 transitions. [2024-06-27 23:10:42,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 270 transitions, 3509 flow [2024-06-27 23:10:42,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 270 transitions, 3292 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:42,615 INFO L231 Difference]: Finished difference. Result has 166 places, 259 transitions, 2898 flow [2024-06-27 23:10:42,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2782, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2898, PETRI_PLACES=166, PETRI_TRANSITIONS=259} [2024-06-27 23:10:42,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 23:10:42,615 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 259 transitions, 2898 flow [2024-06-27 23:10:42,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:42,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:42,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:42,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:10:42,616 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:42,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -904163008, now seen corresponding path program 4 times [2024-06-27 23:10:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:42,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103766306] [2024-06-27 23:10:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:43,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:43,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103766306] [2024-06-27 23:10:43,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103766306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:43,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:43,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:43,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434167567] [2024-06-27 23:10:43,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:43,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:43,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:44,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:44,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 259 transitions, 2898 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:44,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:44,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:44,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:44,915 INFO L124 PetriNetUnfolderBase]: 2288/3579 cut-off events. [2024-06-27 23:10:44,915 INFO L125 PetriNetUnfolderBase]: For 145502/145502 co-relation queries the response was YES. [2024-06-27 23:10:44,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23069 conditions, 3579 events. 2288/3579 cut-off events. For 145502/145502 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19027 event pairs, 584 based on Foata normal form. 4/3579 useless extension candidates. Maximal degree in co-relation 22988. Up to 3166 conditions per place. [2024-06-27 23:10:44,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 93 changer transitions 0/284 dead transitions. [2024-06-27 23:10:44,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 284 transitions, 3618 flow [2024-06-27 23:10:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:10:44,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:10:44,948 INFO L175 Difference]: Start difference. First operand has 166 places, 259 transitions, 2898 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:10:44,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 284 transitions, 3618 flow [2024-06-27 23:10:45,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 284 transitions, 3515 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:45,067 INFO L231 Difference]: Finished difference. Result has 169 places, 261 transitions, 3041 flow [2024-06-27 23:10:45,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3041, PETRI_PLACES=169, PETRI_TRANSITIONS=261} [2024-06-27 23:10:45,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 23:10:45,068 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 261 transitions, 3041 flow [2024-06-27 23:10:45,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:45,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:45,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:45,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:10:45,069 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:45,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash 499702991, now seen corresponding path program 2 times [2024-06-27 23:10:45,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:45,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108510657] [2024-06-27 23:10:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:45,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:46,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108510657] [2024-06-27 23:10:46,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108510657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:46,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:46,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:10:46,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468244339] [2024-06-27 23:10:46,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:46,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:10:46,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:10:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:10:46,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:10:46,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 261 transitions, 3041 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:46,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:46,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:10:46,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:46,631 INFO L124 PetriNetUnfolderBase]: 1967/3201 cut-off events. [2024-06-27 23:10:46,632 INFO L125 PetriNetUnfolderBase]: For 149000/149002 co-relation queries the response was YES. [2024-06-27 23:10:46,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21511 conditions, 3201 events. 1967/3201 cut-off events. For 149000/149002 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17996 event pairs, 555 based on Foata normal form. 1/3152 useless extension candidates. Maximal degree in co-relation 21429. Up to 2749 conditions per place. [2024-06-27 23:10:46,665 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 44 changer transitions 0/276 dead transitions. [2024-06-27 23:10:46,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 276 transitions, 3665 flow [2024-06-27 23:10:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:10:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:10:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 23:10:46,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:10:46,667 INFO L175 Difference]: Start difference. First operand has 169 places, 261 transitions, 3041 flow. Second operand 7 states and 133 transitions. [2024-06-27 23:10:46,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 276 transitions, 3665 flow [2024-06-27 23:10:46,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 276 transitions, 3439 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:46,777 INFO L231 Difference]: Finished difference. Result has 169 places, 267 transitions, 2983 flow [2024-06-27 23:10:46,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2983, PETRI_PLACES=169, PETRI_TRANSITIONS=267} [2024-06-27 23:10:46,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 23:10:46,779 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 267 transitions, 2983 flow [2024-06-27 23:10:46,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:46,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:46,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:46,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:10:46,779 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:46,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:46,780 INFO L85 PathProgramCache]: Analyzing trace with hash -38206900, now seen corresponding path program 5 times [2024-06-27 23:10:46,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:46,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086156017] [2024-06-27 23:10:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:47,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:47,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086156017] [2024-06-27 23:10:47,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086156017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:47,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:47,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376619469] [2024-06-27 23:10:47,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:47,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:47,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:47,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 267 transitions, 2983 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:47,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:47,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:47,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:48,731 INFO L124 PetriNetUnfolderBase]: 2391/3747 cut-off events. [2024-06-27 23:10:48,731 INFO L125 PetriNetUnfolderBase]: For 164673/164675 co-relation queries the response was YES. [2024-06-27 23:10:48,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24804 conditions, 3747 events. 2391/3747 cut-off events. For 164673/164675 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20314 event pairs, 597 based on Foata normal form. 6/3751 useless extension candidates. Maximal degree in co-relation 24721. Up to 3321 conditions per place. [2024-06-27 23:10:48,763 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 240 selfloop transitions, 76 changer transitions 0/321 dead transitions. [2024-06-27 23:10:48,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 321 transitions, 4075 flow [2024-06-27 23:10:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 23:10:48,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:10:48,766 INFO L175 Difference]: Start difference. First operand has 169 places, 267 transitions, 2983 flow. Second operand 11 states and 209 transitions. [2024-06-27 23:10:48,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 321 transitions, 4075 flow [2024-06-27 23:10:48,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 321 transitions, 4007 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 23:10:48,934 INFO L231 Difference]: Finished difference. Result has 178 places, 279 transitions, 3263 flow [2024-06-27 23:10:48,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3263, PETRI_PLACES=178, PETRI_TRANSITIONS=279} [2024-06-27 23:10:48,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 23:10:48,935 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 279 transitions, 3263 flow [2024-06-27 23:10:48,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:48,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:48,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:48,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:10:48,936 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:48,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1954254166, now seen corresponding path program 6 times [2024-06-27 23:10:48,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013478007] [2024-06-27 23:10:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:49,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:49,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013478007] [2024-06-27 23:10:49,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013478007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:49,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:49,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429828831] [2024-06-27 23:10:49,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:49,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:49,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:49,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 279 transitions, 3263 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:49,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:49,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:49,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:50,994 INFO L124 PetriNetUnfolderBase]: 2410/3794 cut-off events. [2024-06-27 23:10:50,995 INFO L125 PetriNetUnfolderBase]: For 173799/173801 co-relation queries the response was YES. [2024-06-27 23:10:51,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25687 conditions, 3794 events. 2410/3794 cut-off events. For 173799/173801 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20790 event pairs, 626 based on Foata normal form. 6/3798 useless extension candidates. Maximal degree in co-relation 25601. Up to 3433 conditions per place. [2024-06-27 23:10:51,025 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 68 changer transitions 0/319 dead transitions. [2024-06-27 23:10:51,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 319 transitions, 4113 flow [2024-06-27 23:10:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 23:10:51,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 23:10:51,027 INFO L175 Difference]: Start difference. First operand has 178 places, 279 transitions, 3263 flow. Second operand 11 states and 203 transitions. [2024-06-27 23:10:51,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 319 transitions, 4113 flow [2024-06-27 23:10:51,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 319 transitions, 3963 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:51,195 INFO L231 Difference]: Finished difference. Result has 182 places, 283 transitions, 3344 flow [2024-06-27 23:10:51,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3344, PETRI_PLACES=182, PETRI_TRANSITIONS=283} [2024-06-27 23:10:51,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 23:10:51,195 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 283 transitions, 3344 flow [2024-06-27 23:10:51,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:51,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:51,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:51,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:10:51,196 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:51,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 314397998, now seen corresponding path program 7 times [2024-06-27 23:10:51,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:51,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352112757] [2024-06-27 23:10:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:51,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:51,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352112757] [2024-06-27 23:10:51,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352112757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:51,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:51,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:10:51,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694126797] [2024-06-27 23:10:51,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:51,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:10:51,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:51,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:10:51,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:10:51,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:10:51,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 283 transitions, 3344 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:51,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:51,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:10:51,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:52,861 INFO L124 PetriNetUnfolderBase]: 2067/3486 cut-off events. [2024-06-27 23:10:52,861 INFO L125 PetriNetUnfolderBase]: For 168669/168753 co-relation queries the response was YES. [2024-06-27 23:10:52,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23481 conditions, 3486 events. 2067/3486 cut-off events. For 168669/168753 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20770 event pairs, 360 based on Foata normal form. 47/3478 useless extension candidates. Maximal degree in co-relation 23393. Up to 2461 conditions per place. [2024-06-27 23:10:52,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 92 changer transitions 0/338 dead transitions. [2024-06-27 23:10:52,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 338 transitions, 4476 flow [2024-06-27 23:10:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 23:10:52,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-27 23:10:52,896 INFO L175 Difference]: Start difference. First operand has 182 places, 283 transitions, 3344 flow. Second operand 10 states and 213 transitions. [2024-06-27 23:10:52,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 338 transitions, 4476 flow [2024-06-27 23:10:53,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 338 transitions, 4315 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 23:10:53,043 INFO L231 Difference]: Finished difference. Result has 185 places, 301 transitions, 3709 flow [2024-06-27 23:10:53,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3183, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3709, PETRI_PLACES=185, PETRI_TRANSITIONS=301} [2024-06-27 23:10:53,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 23:10:53,043 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 301 transitions, 3709 flow [2024-06-27 23:10:53,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:53,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:53,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:53,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:10:53,044 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:53,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:53,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1746644930, now seen corresponding path program 8 times [2024-06-27 23:10:53,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:53,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879897003] [2024-06-27 23:10:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:53,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:54,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:54,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879897003] [2024-06-27 23:10:54,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879897003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:54,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:54,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:54,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741384093] [2024-06-27 23:10:54,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:54,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:54,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:54,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:54,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:54,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 301 transitions, 3709 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:54,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:54,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:54,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:55,074 INFO L124 PetriNetUnfolderBase]: 2646/4156 cut-off events. [2024-06-27 23:10:55,075 INFO L125 PetriNetUnfolderBase]: For 203874/203876 co-relation queries the response was YES. [2024-06-27 23:10:55,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29273 conditions, 4156 events. 2646/4156 cut-off events. For 203874/203876 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23132 event pairs, 627 based on Foata normal form. 8/4162 useless extension candidates. Maximal degree in co-relation 29182. Up to 3672 conditions per place. [2024-06-27 23:10:55,113 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 276 selfloop transitions, 77 changer transitions 0/358 dead transitions. [2024-06-27 23:10:55,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 358 transitions, 5070 flow [2024-06-27 23:10:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:10:55,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 23:10:55,114 INFO L175 Difference]: Start difference. First operand has 185 places, 301 transitions, 3709 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:10:55,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 358 transitions, 5070 flow [2024-06-27 23:10:55,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 358 transitions, 4909 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 23:10:55,353 INFO L231 Difference]: Finished difference. Result has 192 places, 321 transitions, 4127 flow [2024-06-27 23:10:55,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4127, PETRI_PLACES=192, PETRI_TRANSITIONS=321} [2024-06-27 23:10:55,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-27 23:10:55,354 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 321 transitions, 4127 flow [2024-06-27 23:10:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:55,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:55,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:55,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:10:55,355 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:55,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1857349340, now seen corresponding path program 9 times [2024-06-27 23:10:55,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:55,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784182694] [2024-06-27 23:10:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:55,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:56,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784182694] [2024-06-27 23:10:56,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784182694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:56,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:56,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:56,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855833380] [2024-06-27 23:10:56,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:56,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:56,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:56,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:56,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 321 transitions, 4127 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:56,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:56,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:56,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:57,589 INFO L124 PetriNetUnfolderBase]: 2628/4132 cut-off events. [2024-06-27 23:10:57,589 INFO L125 PetriNetUnfolderBase]: For 197075/197077 co-relation queries the response was YES. [2024-06-27 23:10:57,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28811 conditions, 4132 events. 2628/4132 cut-off events. For 197075/197077 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23024 event pairs, 650 based on Foata normal form. 10/4140 useless extension candidates. Maximal degree in co-relation 28718. Up to 3776 conditions per place. [2024-06-27 23:10:57,630 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 285 selfloop transitions, 59 changer transitions 0/349 dead transitions. [2024-06-27 23:10:57,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 349 transitions, 4930 flow [2024-06-27 23:10:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:10:57,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:10:57,632 INFO L175 Difference]: Start difference. First operand has 192 places, 321 transitions, 4127 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:10:57,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 349 transitions, 4930 flow [2024-06-27 23:10:57,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 349 transitions, 4597 flow, removed 109 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:57,848 INFO L231 Difference]: Finished difference. Result has 194 places, 321 transitions, 3930 flow [2024-06-27 23:10:57,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3930, PETRI_PLACES=194, PETRI_TRANSITIONS=321} [2024-06-27 23:10:57,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 23:10:57,849 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 321 transitions, 3930 flow [2024-06-27 23:10:57,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:57,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:57,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:10:57,850 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:57,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1742058170, now seen corresponding path program 10 times [2024-06-27 23:10:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477080058] [2024-06-27 23:10:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:58,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:58,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477080058] [2024-06-27 23:10:58,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477080058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:58,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:58,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:10:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40693386] [2024-06-27 23:10:58,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:10:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:58,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:10:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:10:59,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:10:59,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 321 transitions, 3930 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:59,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:59,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:10:59,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:59,993 INFO L124 PetriNetUnfolderBase]: 2631/4139 cut-off events. [2024-06-27 23:10:59,993 INFO L125 PetriNetUnfolderBase]: For 195338/195340 co-relation queries the response was YES. [2024-06-27 23:11:00,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28266 conditions, 4139 events. 2631/4139 cut-off events. For 195338/195340 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23059 event pairs, 638 based on Foata normal form. 6/4143 useless extension candidates. Maximal degree in co-relation 28172. Up to 3696 conditions per place. [2024-06-27 23:11:00,034 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 251 selfloop transitions, 98 changer transitions 0/354 dead transitions. [2024-06-27 23:11:00,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 354 transitions, 4838 flow [2024-06-27 23:11:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:11:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:11:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:11:00,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 23:11:00,035 INFO L175 Difference]: Start difference. First operand has 194 places, 321 transitions, 3930 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:11:00,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 354 transitions, 4838 flow [2024-06-27 23:11:00,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 354 transitions, 4717 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:11:00,203 INFO L231 Difference]: Finished difference. Result has 195 places, 325 transitions, 4087 flow [2024-06-27 23:11:00,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4087, PETRI_PLACES=195, PETRI_TRANSITIONS=325} [2024-06-27 23:11:00,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 23:11:00,204 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 325 transitions, 4087 flow [2024-06-27 23:11:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:00,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:00,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:11:00,204 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 23:11:00,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash 603826017, now seen corresponding path program 3 times [2024-06-27 23:11:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414502544] [2024-06-27 23:11:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:00,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:00,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414502544] [2024-06-27 23:11:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414502544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:00,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:00,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:11:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162821755] [2024-06-27 23:11:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:11:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:11:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:11:01,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:11:01,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 325 transitions, 4087 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:01,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:01,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:11:01,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:01,712 INFO L124 PetriNetUnfolderBase]: 2247/3703 cut-off events. [2024-06-27 23:11:01,712 INFO L125 PetriNetUnfolderBase]: For 183054/183055 co-relation queries the response was YES. [2024-06-27 23:11:01,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25581 conditions, 3703 events. 2247/3703 cut-off events. For 183054/183055 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22047 event pairs, 616 based on Foata normal form. 3/3649 useless extension candidates. Maximal degree in co-relation 25487. Up to 3152 conditions per place. [2024-06-27 23:11:01,748 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 41 changer transitions 0/345 dead transitions. [2024-06-27 23:11:01,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 345 transitions, 4727 flow [2024-06-27 23:11:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:11:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:11:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 23:11:01,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 23:11:01,749 INFO L175 Difference]: Start difference. First operand has 195 places, 325 transitions, 4087 flow. Second operand 7 states and 142 transitions. [2024-06-27 23:11:01,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 345 transitions, 4727 flow [2024-06-27 23:11:01,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 345 transitions, 4475 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:01,922 INFO L231 Difference]: Finished difference. Result has 195 places, 328 transitions, 3956 flow [2024-06-27 23:11:01,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3835, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3956, PETRI_PLACES=195, PETRI_TRANSITIONS=328} [2024-06-27 23:11:01,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 23:11:01,922 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 328 transitions, 3956 flow [2024-06-27 23:11:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:01,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:01,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:01,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:11:01,923 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:01,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash -858104077, now seen corresponding path program 1 times [2024-06-27 23:11:01,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:01,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621558521] [2024-06-27 23:11:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:02,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:02,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621558521] [2024-06-27 23:11:02,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621558521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:02,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:02,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:11:02,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415759973] [2024-06-27 23:11:02,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:02,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:11:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:11:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:11:02,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:11:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 328 transitions, 3956 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 23:11:02,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:02,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:11:02,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:03,512 INFO L124 PetriNetUnfolderBase]: 2518/4039 cut-off events. [2024-06-27 23:11:03,512 INFO L125 PetriNetUnfolderBase]: For 191344/191344 co-relation queries the response was YES. [2024-06-27 23:11:03,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27561 conditions, 4039 events. 2518/4039 cut-off events. For 191344/191344 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23159 event pairs, 788 based on Foata normal form. 1/4038 useless extension candidates. Maximal degree in co-relation 27466. Up to 3709 conditions per place. [2024-06-27 23:11:03,547 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 13 changer transitions 0/342 dead transitions. [2024-06-27 23:11:03,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 342 transitions, 4726 flow [2024-06-27 23:11:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:11:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:11:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 23:11:03,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 23:11:03,548 INFO L175 Difference]: Start difference. First operand has 195 places, 328 transitions, 3956 flow. Second operand 6 states and 115 transitions. [2024-06-27 23:11:03,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 342 transitions, 4726 flow [2024-06-27 23:11:03,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 342 transitions, 4631 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:11:03,728 INFO L231 Difference]: Finished difference. Result has 195 places, 331 transitions, 3943 flow [2024-06-27 23:11:03,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3943, PETRI_PLACES=195, PETRI_TRANSITIONS=331} [2024-06-27 23:11:03,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 23:11:03,729 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 331 transitions, 3943 flow [2024-06-27 23:11:03,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 23:11:03,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:03,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:03,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:11:03,729 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:03,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash -857866927, now seen corresponding path program 2 times [2024-06-27 23:11:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:03,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79322042] [2024-06-27 23:11:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:04,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:04,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79322042] [2024-06-27 23:11:04,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79322042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:04,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:04,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:11:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331933069] [2024-06-27 23:11:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:04,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:11:04,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:11:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:11:04,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:11:04,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 331 transitions, 3943 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 23:11:04,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:04,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:11:04,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:05,479 INFO L124 PetriNetUnfolderBase]: 2515/4036 cut-off events. [2024-06-27 23:11:05,480 INFO L125 PetriNetUnfolderBase]: For 197736/197738 co-relation queries the response was YES. [2024-06-27 23:11:05,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27845 conditions, 4036 events. 2515/4036 cut-off events. For 197736/197738 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23243 event pairs, 792 based on Foata normal form. 3/4037 useless extension candidates. Maximal degree in co-relation 27749. Up to 3699 conditions per place. [2024-06-27 23:11:05,520 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 317 selfloop transitions, 18 changer transitions 0/342 dead transitions. [2024-06-27 23:11:05,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 342 transitions, 4697 flow [2024-06-27 23:11:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:11:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:11:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 23:11:05,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:11:05,522 INFO L175 Difference]: Start difference. First operand has 195 places, 331 transitions, 3943 flow. Second operand 6 states and 114 transitions. [2024-06-27 23:11:05,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 342 transitions, 4697 flow [2024-06-27 23:11:05,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 342 transitions, 4637 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 23:11:05,704 INFO L231 Difference]: Finished difference. Result has 197 places, 334 transitions, 3981 flow [2024-06-27 23:11:05,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3883, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3981, PETRI_PLACES=197, PETRI_TRANSITIONS=334} [2024-06-27 23:11:05,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 23:11:05,705 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 334 transitions, 3981 flow [2024-06-27 23:11:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 23:11:05,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:05,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:11:05,706 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:05,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -857857999, now seen corresponding path program 1 times [2024-06-27 23:11:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846584462] [2024-06-27 23:11:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:07,658 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 23:11:07,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:07,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846584462] [2024-06-27 23:11:07,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846584462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:07,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:07,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:07,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673101917] [2024-06-27 23:11:07,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:07,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:07,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:07,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:11:07,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 334 transitions, 3981 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:07,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:07,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:11:07,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:08,567 INFO L124 PetriNetUnfolderBase]: 2238/3654 cut-off events. [2024-06-27 23:11:08,568 INFO L125 PetriNetUnfolderBase]: For 206626/206660 co-relation queries the response was YES. [2024-06-27 23:11:08,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25852 conditions, 3654 events. 2238/3654 cut-off events. For 206626/206660 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21588 event pairs, 755 based on Foata normal form. 10/3578 useless extension candidates. Maximal degree in co-relation 25755. Up to 3186 conditions per place. [2024-06-27 23:11:08,605 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 16 changer transitions 0/347 dead transitions. [2024-06-27 23:11:08,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 347 transitions, 4603 flow [2024-06-27 23:11:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:11:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:11:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 23:11:08,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 23:11:08,607 INFO L175 Difference]: Start difference. First operand has 197 places, 334 transitions, 3981 flow. Second operand 8 states and 146 transitions. [2024-06-27 23:11:08,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 347 transitions, 4603 flow [2024-06-27 23:11:08,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 347 transitions, 4527 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 23:11:08,851 INFO L231 Difference]: Finished difference. Result has 201 places, 337 transitions, 3985 flow [2024-06-27 23:11:08,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3905, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3985, PETRI_PLACES=201, PETRI_TRANSITIONS=337} [2024-06-27 23:11:08,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-27 23:11:08,852 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 337 transitions, 3985 flow [2024-06-27 23:11:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:08,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:08,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:11:08,854 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:08,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:08,854 INFO L85 PathProgramCache]: Analyzing trace with hash 860652087, now seen corresponding path program 1 times [2024-06-27 23:11:08,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351413122] [2024-06-27 23:11:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:10,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:10,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351413122] [2024-06-27 23:11:10,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351413122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:10,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:10,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145636488] [2024-06-27 23:11:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:10,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:10,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 337 transitions, 3985 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:10,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:10,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:10,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:11,591 INFO L124 PetriNetUnfolderBase]: 2800/4440 cut-off events. [2024-06-27 23:11:11,592 INFO L125 PetriNetUnfolderBase]: For 249451/249451 co-relation queries the response was YES. [2024-06-27 23:11:11,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31751 conditions, 4440 events. 2800/4440 cut-off events. For 249451/249451 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25413 event pairs, 648 based on Foata normal form. 16/4452 useless extension candidates. Maximal degree in co-relation 31653. Up to 3552 conditions per place. [2024-06-27 23:11:11,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 299 selfloop transitions, 80 changer transitions 0/384 dead transitions. [2024-06-27 23:11:11,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 384 transitions, 5200 flow [2024-06-27 23:11:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 23:11:11,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:11:11,643 INFO L175 Difference]: Start difference. First operand has 201 places, 337 transitions, 3985 flow. Second operand 11 states and 210 transitions. [2024-06-27 23:11:11,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 384 transitions, 5200 flow [2024-06-27 23:11:11,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 384 transitions, 5142 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:11:11,887 INFO L231 Difference]: Finished difference. Result has 206 places, 339 transitions, 4175 flow [2024-06-27 23:11:11,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4175, PETRI_PLACES=206, PETRI_TRANSITIONS=339} [2024-06-27 23:11:11,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 23:11:11,888 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 339 transitions, 4175 flow [2024-06-27 23:11:11,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:11,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:11,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:11,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:11:11,889 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:11,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash 393454130, now seen corresponding path program 1 times [2024-06-27 23:11:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:11,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989370413] [2024-06-27 23:11:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:11,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989370413] [2024-06-27 23:11:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989370413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:13,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:13,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841338259] [2024-06-27 23:11:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:13,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:13,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:13,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 339 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:13,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:13,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:13,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:14,834 INFO L124 PetriNetUnfolderBase]: 2858/4540 cut-off events. [2024-06-27 23:11:14,835 INFO L125 PetriNetUnfolderBase]: For 264511/264511 co-relation queries the response was YES. [2024-06-27 23:11:14,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32902 conditions, 4540 events. 2858/4540 cut-off events. For 264511/264511 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26073 event pairs, 683 based on Foata normal form. 16/4552 useless extension candidates. Maximal degree in co-relation 32803. Up to 3802 conditions per place. [2024-06-27 23:11:14,872 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 306 selfloop transitions, 67 changer transitions 0/378 dead transitions. [2024-06-27 23:11:14,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 378 transitions, 5308 flow [2024-06-27 23:11:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 23:11:14,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-27 23:11:14,874 INFO L175 Difference]: Start difference. First operand has 206 places, 339 transitions, 4175 flow. Second operand 10 states and 191 transitions. [2024-06-27 23:11:14,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 378 transitions, 5308 flow [2024-06-27 23:11:15,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 378 transitions, 5197 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:15,075 INFO L231 Difference]: Finished difference. Result has 209 places, 340 transitions, 4248 flow [2024-06-27 23:11:15,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4248, PETRI_PLACES=209, PETRI_TRANSITIONS=340} [2024-06-27 23:11:15,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-27 23:11:15,076 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 340 transitions, 4248 flow [2024-06-27 23:11:15,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:15,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:15,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:15,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:11:15,076 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:15,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 393602000, now seen corresponding path program 2 times [2024-06-27 23:11:15,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:15,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179481623] [2024-06-27 23:11:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:16,452 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 23:11:16,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:16,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179481623] [2024-06-27 23:11:16,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179481623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:16,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:16,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479915545] [2024-06-27 23:11:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:16,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:16,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:16,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 340 transitions, 4248 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:16,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:16,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:16,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:17,661 INFO L124 PetriNetUnfolderBase]: 2822/4484 cut-off events. [2024-06-27 23:11:17,661 INFO L125 PetriNetUnfolderBase]: For 254375/254375 co-relation queries the response was YES. [2024-06-27 23:11:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31909 conditions, 4484 events. 2822/4484 cut-off events. For 254375/254375 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25740 event pairs, 705 based on Foata normal form. 20/4500 useless extension candidates. Maximal degree in co-relation 31808. Up to 3963 conditions per place. [2024-06-27 23:11:17,702 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 60 changer transitions 0/370 dead transitions. [2024-06-27 23:11:17,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 370 transitions, 5110 flow [2024-06-27 23:11:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 23:11:17,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:11:17,712 INFO L175 Difference]: Start difference. First operand has 209 places, 340 transitions, 4248 flow. Second operand 10 states and 185 transitions. [2024-06-27 23:11:17,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 370 transitions, 5110 flow [2024-06-27 23:11:18,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 370 transitions, 4933 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 23:11:18,055 INFO L231 Difference]: Finished difference. Result has 211 places, 340 transitions, 4204 flow [2024-06-27 23:11:18,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4204, PETRI_PLACES=211, PETRI_TRANSITIONS=340} [2024-06-27 23:11:18,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 23:11:18,056 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 340 transitions, 4204 flow [2024-06-27 23:11:18,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:18,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:18,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:18,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:11:18,056 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:18,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash -327339026, now seen corresponding path program 3 times [2024-06-27 23:11:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11148931] [2024-06-27 23:11:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:18,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:19,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:19,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11148931] [2024-06-27 23:11:19,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11148931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:19,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:19,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:19,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574613158] [2024-06-27 23:11:19,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:19,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:19,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:19,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 340 transitions, 4204 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:19,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:19,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:19,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:20,811 INFO L124 PetriNetUnfolderBase]: 2897/4613 cut-off events. [2024-06-27 23:11:20,811 INFO L125 PetriNetUnfolderBase]: For 264599/264601 co-relation queries the response was YES. [2024-06-27 23:11:20,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32569 conditions, 4613 events. 2897/4613 cut-off events. For 264599/264601 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 26735 event pairs, 680 based on Foata normal form. 20/4629 useless extension candidates. Maximal degree in co-relation 32467. Up to 3569 conditions per place. [2024-06-27 23:11:20,859 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 213 selfloop transitions, 161 changer transitions 0/379 dead transitions. [2024-06-27 23:11:20,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 379 transitions, 5206 flow [2024-06-27 23:11:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:11:20,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 23:11:20,861 INFO L175 Difference]: Start difference. First operand has 211 places, 340 transitions, 4204 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:11:20,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 379 transitions, 5206 flow [2024-06-27 23:11:21,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 379 transitions, 5068 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:21,217 INFO L231 Difference]: Finished difference. Result has 212 places, 341 transitions, 4441 flow [2024-06-27 23:11:21,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4441, PETRI_PLACES=212, PETRI_TRANSITIONS=341} [2024-06-27 23:11:21,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 23:11:21,218 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 341 transitions, 4441 flow [2024-06-27 23:11:21,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:21,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:21,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:21,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:11:21,219 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:21,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -327486896, now seen corresponding path program 4 times [2024-06-27 23:11:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667446908] [2024-06-27 23:11:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:22,725 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 23:11:22,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:22,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667446908] [2024-06-27 23:11:22,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667446908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:22,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:22,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:22,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180809516] [2024-06-27 23:11:22,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:22,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:22,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:22,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:22,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 341 transitions, 4441 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:22,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:22,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:22,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:24,098 INFO L124 PetriNetUnfolderBase]: 3066/4897 cut-off events. [2024-06-27 23:11:24,098 INFO L125 PetriNetUnfolderBase]: For 300020/300022 co-relation queries the response was YES. [2024-06-27 23:11:24,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35960 conditions, 4897 events. 3066/4897 cut-off events. For 300020/300022 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28901 event pairs, 692 based on Foata normal form. 16/4909 useless extension candidates. Maximal degree in co-relation 35857. Up to 3535 conditions per place. [2024-06-27 23:11:24,144 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 217 selfloop transitions, 164 changer transitions 0/386 dead transitions. [2024-06-27 23:11:24,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 386 transitions, 5696 flow [2024-06-27 23:11:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 23:11:24,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:11:24,146 INFO L175 Difference]: Start difference. First operand has 212 places, 341 transitions, 4441 flow. Second operand 10 states and 200 transitions. [2024-06-27 23:11:24,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 386 transitions, 5696 flow [2024-06-27 23:11:24,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 386 transitions, 5307 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:24,577 INFO L231 Difference]: Finished difference. Result has 213 places, 343 transitions, 4473 flow [2024-06-27 23:11:24,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4473, PETRI_PLACES=213, PETRI_TRANSITIONS=343} [2024-06-27 23:11:24,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 23:11:24,578 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 343 transitions, 4473 flow [2024-06-27 23:11:24,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:24,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:24,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:11:24,579 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:24,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1479501708, now seen corresponding path program 5 times [2024-06-27 23:11:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:24,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342406839] [2024-06-27 23:11:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:25,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:25,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342406839] [2024-06-27 23:11:25,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342406839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:25,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:25,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397494255] [2024-06-27 23:11:25,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:25,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:26,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:26,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 343 transitions, 4473 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:26,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:26,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:26,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:27,386 INFO L124 PetriNetUnfolderBase]: 3030/4841 cut-off events. [2024-06-27 23:11:27,386 INFO L125 PetriNetUnfolderBase]: For 292684/292686 co-relation queries the response was YES. [2024-06-27 23:11:27,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34759 conditions, 4841 events. 3030/4841 cut-off events. For 292684/292686 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28487 event pairs, 730 based on Foata normal form. 20/4857 useless extension candidates. Maximal degree in co-relation 34656. Up to 3792 conditions per place. [2024-06-27 23:11:27,440 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 210 selfloop transitions, 165 changer transitions 0/380 dead transitions. [2024-06-27 23:11:27,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 380 transitions, 5433 flow [2024-06-27 23:11:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 23:11:27,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 23:11:27,456 INFO L175 Difference]: Start difference. First operand has 213 places, 343 transitions, 4473 flow. Second operand 10 states and 194 transitions. [2024-06-27 23:11:27,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 380 transitions, 5433 flow [2024-06-27 23:11:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 380 transitions, 5205 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 23:11:27,871 INFO L231 Difference]: Finished difference. Result has 217 places, 343 transitions, 4586 flow [2024-06-27 23:11:27,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4586, PETRI_PLACES=217, PETRI_TRANSITIONS=343} [2024-06-27 23:11:27,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-27 23:11:27,872 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 343 transitions, 4586 flow [2024-06-27 23:11:27,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:27,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:27,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:27,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:11:27,877 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:27,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash -321761165, now seen corresponding path program 1 times [2024-06-27 23:11:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:27,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523402277] [2024-06-27 23:11:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:27,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:29,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:29,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523402277] [2024-06-27 23:11:29,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523402277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:29,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:29,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:29,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043207734] [2024-06-27 23:11:29,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:29,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:29,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:29,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:29,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:29,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 343 transitions, 4586 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:30,731 INFO L124 PetriNetUnfolderBase]: 3047/4875 cut-off events. [2024-06-27 23:11:30,732 INFO L125 PetriNetUnfolderBase]: For 282487/282491 co-relation queries the response was YES. [2024-06-27 23:11:30,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35314 conditions, 4875 events. 3047/4875 cut-off events. For 282487/282491 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28858 event pairs, 779 based on Foata normal form. 6/4878 useless extension candidates. Maximal degree in co-relation 35209. Up to 4393 conditions per place. [2024-06-27 23:11:30,780 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 306 selfloop transitions, 70 changer transitions 0/381 dead transitions. [2024-06-27 23:11:30,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 381 transitions, 5603 flow [2024-06-27 23:11:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 23:11:30,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 23:11:30,782 INFO L175 Difference]: Start difference. First operand has 217 places, 343 transitions, 4586 flow. Second operand 10 states and 184 transitions. [2024-06-27 23:11:30,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 381 transitions, 5603 flow [2024-06-27 23:11:31,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 381 transitions, 5212 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 23:11:31,211 INFO L231 Difference]: Finished difference. Result has 218 places, 352 transitions, 4489 flow [2024-06-27 23:11:31,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4210, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4489, PETRI_PLACES=218, PETRI_TRANSITIONS=352} [2024-06-27 23:11:31,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 23:11:31,212 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 352 transitions, 4489 flow [2024-06-27 23:11:31,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:31,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:31,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:31,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:11:31,213 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:31,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -261157136, now seen corresponding path program 1 times [2024-06-27 23:11:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053099176] [2024-06-27 23:11:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053099176] [2024-06-27 23:11:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053099176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:33,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:33,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:11:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766695679] [2024-06-27 23:11:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:33,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:11:33,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:11:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:11:33,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:11:33,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 352 transitions, 4489 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:33,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:33,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:11:33,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:34,106 INFO L124 PetriNetUnfolderBase]: 2681/4463 cut-off events. [2024-06-27 23:11:34,106 INFO L125 PetriNetUnfolderBase]: For 283304/283310 co-relation queries the response was YES. [2024-06-27 23:11:34,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32720 conditions, 4463 events. 2681/4463 cut-off events. For 283304/283310 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27859 event pairs, 693 based on Foata normal form. 3/4397 useless extension candidates. Maximal degree in co-relation 32614. Up to 3810 conditions per place. [2024-06-27 23:11:34,152 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 248 selfloop transitions, 42 changer transitions 0/367 dead transitions. [2024-06-27 23:11:34,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 367 transitions, 5153 flow [2024-06-27 23:11:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:11:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:11:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:11:34,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:11:34,153 INFO L175 Difference]: Start difference. First operand has 218 places, 352 transitions, 4489 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:11:34,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 367 transitions, 5153 flow [2024-06-27 23:11:34,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 367 transitions, 4970 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:34,457 INFO L231 Difference]: Finished difference. Result has 219 places, 355 transitions, 4441 flow [2024-06-27 23:11:34,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4441, PETRI_PLACES=219, PETRI_TRANSITIONS=355} [2024-06-27 23:11:34,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 23:11:34,457 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 355 transitions, 4441 flow [2024-06-27 23:11:34,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:34,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:34,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:34,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:11:34,458 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:34,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1635191698, now seen corresponding path program 6 times [2024-06-27 23:11:34,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:34,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143211199] [2024-06-27 23:11:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:35,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:35,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143211199] [2024-06-27 23:11:35,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143211199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:35,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:35,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005948732] [2024-06-27 23:11:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:35,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:36,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:36,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 355 transitions, 4441 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:36,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:36,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:36,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:37,356 INFO L124 PetriNetUnfolderBase]: 3132/5005 cut-off events. [2024-06-27 23:11:37,357 INFO L125 PetriNetUnfolderBase]: For 321981/321981 co-relation queries the response was YES. [2024-06-27 23:11:37,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36701 conditions, 5005 events. 3132/5005 cut-off events. For 321981/321981 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29596 event pairs, 666 based on Foata normal form. 20/5021 useless extension candidates. Maximal degree in co-relation 36595. Up to 3967 conditions per place. [2024-06-27 23:11:37,410 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 204 selfloop transitions, 181 changer transitions 0/390 dead transitions. [2024-06-27 23:11:37,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 390 transitions, 5456 flow [2024-06-27 23:11:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 23:11:37,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 23:11:37,412 INFO L175 Difference]: Start difference. First operand has 219 places, 355 transitions, 4441 flow. Second operand 10 states and 189 transitions. [2024-06-27 23:11:37,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 390 transitions, 5456 flow [2024-06-27 23:11:37,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 390 transitions, 5362 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:11:37,721 INFO L231 Difference]: Finished difference. Result has 224 places, 356 transitions, 4766 flow [2024-06-27 23:11:37,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4766, PETRI_PLACES=224, PETRI_TRANSITIONS=356} [2024-06-27 23:11:37,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 23:11:37,722 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 356 transitions, 4766 flow [2024-06-27 23:11:37,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:37,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:37,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:37,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:11:37,723 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:37,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:37,723 INFO L85 PathProgramCache]: Analyzing trace with hash 512506832, now seen corresponding path program 7 times [2024-06-27 23:11:37,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:37,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460966718] [2024-06-27 23:11:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:37,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:39,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:39,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460966718] [2024-06-27 23:11:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460966718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:39,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:39,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:39,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946428147] [2024-06-27 23:11:39,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:39,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:39,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 356 transitions, 4766 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:39,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:39,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:39,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:40,712 INFO L124 PetriNetUnfolderBase]: 3207/5140 cut-off events. [2024-06-27 23:11:40,713 INFO L125 PetriNetUnfolderBase]: For 342359/342359 co-relation queries the response was YES. [2024-06-27 23:11:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38474 conditions, 5140 events. 3207/5140 cut-off events. For 342359/342359 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30792 event pairs, 690 based on Foata normal form. 20/5156 useless extension candidates. Maximal degree in co-relation 38367. Up to 4092 conditions per place. [2024-06-27 23:11:40,761 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 167 changer transitions 0/394 dead transitions. [2024-06-27 23:11:40,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 394 transitions, 5826 flow [2024-06-27 23:11:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 23:11:40,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-27 23:11:40,762 INFO L175 Difference]: Start difference. First operand has 224 places, 356 transitions, 4766 flow. Second operand 10 states and 191 transitions. [2024-06-27 23:11:40,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 394 transitions, 5826 flow [2024-06-27 23:11:41,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 394 transitions, 5406 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:41,112 INFO L231 Difference]: Finished difference. Result has 225 places, 357 transitions, 4739 flow [2024-06-27 23:11:41,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4739, PETRI_PLACES=225, PETRI_TRANSITIONS=357} [2024-06-27 23:11:41,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 23:11:41,112 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 357 transitions, 4739 flow [2024-06-27 23:11:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:41,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:11:41,113 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:41,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:41,113 INFO L85 PathProgramCache]: Analyzing trace with hash 512358962, now seen corresponding path program 8 times [2024-06-27 23:11:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:41,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16784015] [2024-06-27 23:11:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:41,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16784015] [2024-06-27 23:11:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16784015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:42,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:42,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:42,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643912420] [2024-06-27 23:11:42,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:42,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:42,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:42,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:42,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 357 transitions, 4739 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:42,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:42,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:42,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:44,157 INFO L124 PetriNetUnfolderBase]: 3376/5434 cut-off events. [2024-06-27 23:11:44,158 INFO L125 PetriNetUnfolderBase]: For 379549/379549 co-relation queries the response was YES. [2024-06-27 23:11:44,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41451 conditions, 5434 events. 3376/5434 cut-off events. For 379549/379549 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33216 event pairs, 685 based on Foata normal form. 16/5446 useless extension candidates. Maximal degree in co-relation 41344. Up to 3954 conditions per place. [2024-06-27 23:11:44,217 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 226 selfloop transitions, 170 changer transitions 0/401 dead transitions. [2024-06-27 23:11:44,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 401 transitions, 6082 flow [2024-06-27 23:11:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:11:44,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:11:44,218 INFO L175 Difference]: Start difference. First operand has 225 places, 357 transitions, 4739 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:11:44,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 401 transitions, 6082 flow [2024-06-27 23:11:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 401 transitions, 5695 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:44,706 INFO L231 Difference]: Finished difference. Result has 226 places, 359 transitions, 4800 flow [2024-06-27 23:11:44,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4800, PETRI_PLACES=226, PETRI_TRANSITIONS=359} [2024-06-27 23:11:44,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 23:11:44,706 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 359 transitions, 4800 flow [2024-06-27 23:11:44,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:44,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:44,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:44,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:11:44,707 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:44,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash -110192756, now seen corresponding path program 9 times [2024-06-27 23:11:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:44,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003964881] [2024-06-27 23:11:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:46,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:46,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003964881] [2024-06-27 23:11:46,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003964881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:46,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:46,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:46,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450577967] [2024-06-27 23:11:46,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:46,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:46,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:46,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:46,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 359 transitions, 4800 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:46,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:46,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:46,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:47,821 INFO L124 PetriNetUnfolderBase]: 3340/5378 cut-off events. [2024-06-27 23:11:47,821 INFO L125 PetriNetUnfolderBase]: For 367504/367504 co-relation queries the response was YES. [2024-06-27 23:11:47,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40036 conditions, 5378 events. 3340/5378 cut-off events. For 367504/367504 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 32864 event pairs, 695 based on Foata normal form. 20/5394 useless extension candidates. Maximal degree in co-relation 39929. Up to 4315 conditions per place. [2024-06-27 23:11:47,874 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 228 selfloop transitions, 165 changer transitions 0/398 dead transitions. [2024-06-27 23:11:47,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 398 transitions, 5845 flow [2024-06-27 23:11:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:11:47,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 23:11:47,876 INFO L175 Difference]: Start difference. First operand has 226 places, 359 transitions, 4800 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:11:47,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 398 transitions, 5845 flow [2024-06-27 23:11:48,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 398 transitions, 5590 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 23:11:48,274 INFO L231 Difference]: Finished difference. Result has 230 places, 359 transitions, 4884 flow [2024-06-27 23:11:48,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4884, PETRI_PLACES=230, PETRI_TRANSITIONS=359} [2024-06-27 23:11:48,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 23:11:48,274 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 359 transitions, 4884 flow [2024-06-27 23:11:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:48,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:48,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:48,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:11:48,275 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:48,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash -109977275, now seen corresponding path program 2 times [2024-06-27 23:11:48,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:48,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590667787] [2024-06-27 23:11:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:48,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:49,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:49,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590667787] [2024-06-27 23:11:49,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590667787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:49,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:49,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:49,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056901037] [2024-06-27 23:11:49,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:49,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:49,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:50,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:50,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 359 transitions, 4884 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:50,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:50,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:50,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:51,445 INFO L124 PetriNetUnfolderBase]: 3357/5430 cut-off events. [2024-06-27 23:11:51,445 INFO L125 PetriNetUnfolderBase]: For 350771/350775 co-relation queries the response was YES. [2024-06-27 23:11:51,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40458 conditions, 5430 events. 3357/5430 cut-off events. For 350771/350775 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33490 event pairs, 840 based on Foata normal form. 8/5435 useless extension candidates. Maximal degree in co-relation 40349. Up to 4910 conditions per place. [2024-06-27 23:11:51,499 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 74 changer transitions 0/396 dead transitions. [2024-06-27 23:11:51,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 396 transitions, 5945 flow [2024-06-27 23:11:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 23:11:51,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 23:11:51,501 INFO L175 Difference]: Start difference. First operand has 230 places, 359 transitions, 4884 flow. Second operand 10 states and 182 transitions. [2024-06-27 23:11:51,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 396 transitions, 5945 flow [2024-06-27 23:11:51,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 396 transitions, 5456 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 23:11:51,987 INFO L231 Difference]: Finished difference. Result has 230 places, 366 transitions, 4681 flow [2024-06-27 23:11:51,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4681, PETRI_PLACES=230, PETRI_TRANSITIONS=366} [2024-06-27 23:11:51,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 23:11:51,988 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 366 transitions, 4681 flow [2024-06-27 23:11:51,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:51,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:51,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:51,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:11:51,988 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:51,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1369278937, now seen corresponding path program 3 times [2024-06-27 23:11:51,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:51,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562568784] [2024-06-27 23:11:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:51,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:53,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562568784] [2024-06-27 23:11:53,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562568784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:53,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:53,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889553904] [2024-06-27 23:11:53,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:53,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:53,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:53,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:53,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:53,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 366 transitions, 4681 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:53,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:53,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:53,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:55,298 INFO L124 PetriNetUnfolderBase]: 3392/5501 cut-off events. [2024-06-27 23:11:55,299 INFO L125 PetriNetUnfolderBase]: For 360901/360905 co-relation queries the response was YES. [2024-06-27 23:11:55,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40926 conditions, 5501 events. 3392/5501 cut-off events. For 360901/360905 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34169 event pairs, 852 based on Foata normal form. 8/5506 useless extension candidates. Maximal degree in co-relation 40816. Up to 4957 conditions per place. [2024-06-27 23:11:55,356 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 92 changer transitions 0/409 dead transitions. [2024-06-27 23:11:55,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 409 transitions, 5859 flow [2024-06-27 23:11:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 23:11:55,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:11:55,358 INFO L175 Difference]: Start difference. First operand has 230 places, 366 transitions, 4681 flow. Second operand 10 states and 180 transitions. [2024-06-27 23:11:55,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 409 transitions, 5859 flow [2024-06-27 23:11:55,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 409 transitions, 5633 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:55,846 INFO L231 Difference]: Finished difference. Result has 234 places, 381 transitions, 4895 flow [2024-06-27 23:11:55,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4895, PETRI_PLACES=234, PETRI_TRANSITIONS=381} [2024-06-27 23:11:55,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-27 23:11:55,847 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 381 transitions, 4895 flow [2024-06-27 23:11:55,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:55,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:55,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:55,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:11:55,848 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:55,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash 712024103, now seen corresponding path program 4 times [2024-06-27 23:11:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:55,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460121983] [2024-06-27 23:11:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:55,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:57,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460121983] [2024-06-27 23:11:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460121983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:57,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:57,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:57,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877976699] [2024-06-27 23:11:57,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:57,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:57,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:11:57,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 381 transitions, 4895 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:57,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:57,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:11:57,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:59,139 INFO L124 PetriNetUnfolderBase]: 3409/5505 cut-off events. [2024-06-27 23:11:59,140 INFO L125 PetriNetUnfolderBase]: For 374304/374308 co-relation queries the response was YES. [2024-06-27 23:11:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41798 conditions, 5505 events. 3409/5505 cut-off events. For 374304/374308 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33950 event pairs, 850 based on Foata normal form. 8/5510 useless extension candidates. Maximal degree in co-relation 41686. Up to 4984 conditions per place. [2024-06-27 23:11:59,205 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 316 selfloop transitions, 90 changer transitions 0/411 dead transitions. [2024-06-27 23:11:59,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 411 transitions, 5926 flow [2024-06-27 23:11:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 23:11:59,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 23:11:59,207 INFO L175 Difference]: Start difference. First operand has 234 places, 381 transitions, 4895 flow. Second operand 10 states and 181 transitions. [2024-06-27 23:11:59,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 411 transitions, 5926 flow [2024-06-27 23:11:59,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 411 transitions, 5759 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 23:11:59,750 INFO L231 Difference]: Finished difference. Result has 241 places, 384 transitions, 5014 flow [2024-06-27 23:11:59,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4728, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5014, PETRI_PLACES=241, PETRI_TRANSITIONS=384} [2024-06-27 23:11:59,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 23:11:59,751 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 384 transitions, 5014 flow [2024-06-27 23:11:59,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:59,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:59,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:59,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:11:59,751 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:59,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1368952507, now seen corresponding path program 5 times [2024-06-27 23:11:59,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:59,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784583528] [2024-06-27 23:11:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:01,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784583528] [2024-06-27 23:12:01,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784583528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:01,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:01,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411951588] [2024-06-27 23:12:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:01,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:01,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:01,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 384 transitions, 5014 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:01,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:01,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:01,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:02,756 INFO L124 PetriNetUnfolderBase]: 3426/5545 cut-off events. [2024-06-27 23:12:02,756 INFO L125 PetriNetUnfolderBase]: For 386147/386151 co-relation queries the response was YES. [2024-06-27 23:12:02,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41521 conditions, 5545 events. 3426/5545 cut-off events. For 386147/386151 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34419 event pairs, 795 based on Foata normal form. 8/5550 useless extension candidates. Maximal degree in co-relation 41407. Up to 4880 conditions per place. [2024-06-27 23:12:02,817 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 310 selfloop transitions, 104 changer transitions 0/419 dead transitions. [2024-06-27 23:12:02,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 419 transitions, 6372 flow [2024-06-27 23:12:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 23:12:02,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 23:12:02,819 INFO L175 Difference]: Start difference. First operand has 241 places, 384 transitions, 5014 flow. Second operand 10 states and 183 transitions. [2024-06-27 23:12:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 419 transitions, 6372 flow [2024-06-27 23:12:03,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 419 transitions, 6128 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 23:12:03,507 INFO L231 Difference]: Finished difference. Result has 244 places, 388 transitions, 5133 flow [2024-06-27 23:12:03,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5133, PETRI_PLACES=244, PETRI_TRANSITIONS=388} [2024-06-27 23:12:03,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-27 23:12:03,508 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 388 transitions, 5133 flow [2024-06-27 23:12:03,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:03,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:03,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:03,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:12:03,508 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:03,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1689075304, now seen corresponding path program 2 times [2024-06-27 23:12:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:03,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512761369] [2024-06-27 23:12:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:03,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:05,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:05,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512761369] [2024-06-27 23:12:05,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512761369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:05,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:05,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:12:05,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078118983] [2024-06-27 23:12:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:05,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:12:05,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:12:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:12:05,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:12:05,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 388 transitions, 5133 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:05,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:05,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:12:05,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:06,225 INFO L124 PetriNetUnfolderBase]: 3044/5097 cut-off events. [2024-06-27 23:12:06,226 INFO L125 PetriNetUnfolderBase]: For 394114/394130 co-relation queries the response was YES. [2024-06-27 23:12:06,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38918 conditions, 5097 events. 3044/5097 cut-off events. For 394114/394130 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33152 event pairs, 736 based on Foata normal form. 9/5040 useless extension candidates. Maximal degree in co-relation 38803. Up to 4371 conditions per place. [2024-06-27 23:12:06,283 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 50 changer transitions 0/400 dead transitions. [2024-06-27 23:12:06,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 400 transitions, 5835 flow [2024-06-27 23:12:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:12:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:12:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:12:06,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:12:06,285 INFO L175 Difference]: Start difference. First operand has 244 places, 388 transitions, 5133 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:12:06,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 400 transitions, 5835 flow [2024-06-27 23:12:06,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 400 transitions, 5638 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 23:12:06,732 INFO L231 Difference]: Finished difference. Result has 246 places, 391 transitions, 5092 flow [2024-06-27 23:12:06,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5092, PETRI_PLACES=246, PETRI_TRANSITIONS=391} [2024-06-27 23:12:06,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-27 23:12:06,734 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 391 transitions, 5092 flow [2024-06-27 23:12:06,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:06,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:06,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:06,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:12:06,735 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:06,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1688629834, now seen corresponding path program 3 times [2024-06-27 23:12:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:06,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854580673] [2024-06-27 23:12:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:08,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:08,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854580673] [2024-06-27 23:12:08,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854580673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:08,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:08,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:12:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711386540] [2024-06-27 23:12:08,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:08,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:12:08,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:12:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:12:08,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:12:08,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 391 transitions, 5092 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:08,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:08,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:12:08,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:09,718 INFO L124 PetriNetUnfolderBase]: 3054/5119 cut-off events. [2024-06-27 23:12:09,718 INFO L125 PetriNetUnfolderBase]: For 403316/403329 co-relation queries the response was YES. [2024-06-27 23:12:09,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39368 conditions, 5119 events. 3054/5119 cut-off events. For 403316/403329 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33370 event pairs, 747 based on Foata normal form. 13/5068 useless extension candidates. Maximal degree in co-relation 39251. Up to 4361 conditions per place. [2024-06-27 23:12:09,772 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 61 changer transitions 0/407 dead transitions. [2024-06-27 23:12:09,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 407 transitions, 5988 flow [2024-06-27 23:12:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:12:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:12:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 23:12:09,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 23:12:09,773 INFO L175 Difference]: Start difference. First operand has 246 places, 391 transitions, 5092 flow. Second operand 7 states and 138 transitions. [2024-06-27 23:12:09,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 407 transitions, 5988 flow [2024-06-27 23:12:10,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 407 transitions, 5854 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:12:10,264 INFO L231 Difference]: Finished difference. Result has 247 places, 397 transitions, 5192 flow [2024-06-27 23:12:10,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5192, PETRI_PLACES=247, PETRI_TRANSITIONS=397} [2024-06-27 23:12:10,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 23:12:10,265 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 397 transitions, 5192 flow [2024-06-27 23:12:10,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:10,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:10,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:12:10,266 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:10,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash -260126828, now seen corresponding path program 10 times [2024-06-27 23:12:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:10,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508868128] [2024-06-27 23:12:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:10,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:11,394 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 23:12:11,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508868128] [2024-06-27 23:12:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508868128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:11,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052542246] [2024-06-27 23:12:11,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:11,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:11,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:11,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:11,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 397 transitions, 5192 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:11,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:11,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:11,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:13,113 INFO L124 PetriNetUnfolderBase]: 3740/6072 cut-off events. [2024-06-27 23:12:13,114 INFO L125 PetriNetUnfolderBase]: For 485871/485873 co-relation queries the response was YES. [2024-06-27 23:12:13,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47329 conditions, 6072 events. 3740/6072 cut-off events. For 485871/485873 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 38423 event pairs, 764 based on Foata normal form. 18/6088 useless extension candidates. Maximal degree in co-relation 47211. Up to 4895 conditions per place. [2024-06-27 23:12:13,185 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 349 selfloop transitions, 104 changer transitions 0/458 dead transitions. [2024-06-27 23:12:13,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 458 transitions, 6771 flow [2024-06-27 23:12:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:12:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:12:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-27 23:12:13,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 23:12:13,186 INFO L175 Difference]: Start difference. First operand has 247 places, 397 transitions, 5192 flow. Second operand 12 states and 236 transitions. [2024-06-27 23:12:13,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 458 transitions, 6771 flow [2024-06-27 23:12:13,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 458 transitions, 6659 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 23:12:13,952 INFO L231 Difference]: Finished difference. Result has 257 places, 402 transitions, 5502 flow [2024-06-27 23:12:13,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5080, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5502, PETRI_PLACES=257, PETRI_TRANSITIONS=402} [2024-06-27 23:12:13,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 23:12:13,962 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 402 transitions, 5502 flow [2024-06-27 23:12:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:13,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:13,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:13,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:12:13,963 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:13,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -452335520, now seen corresponding path program 11 times [2024-06-27 23:12:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:13,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40928598] [2024-06-27 23:12:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40928598] [2024-06-27 23:12:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40928598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:15,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:15,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725731599] [2024-06-27 23:12:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:15,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:15,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 402 transitions, 5502 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:15,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:15,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:15,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:16,847 INFO L124 PetriNetUnfolderBase]: 3957/6449 cut-off events. [2024-06-27 23:12:16,847 INFO L125 PetriNetUnfolderBase]: For 542072/542074 co-relation queries the response was YES. [2024-06-27 23:12:16,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51704 conditions, 6449 events. 3957/6449 cut-off events. For 542072/542074 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41552 event pairs, 970 based on Foata normal form. 18/6465 useless extension candidates. Maximal degree in co-relation 51583. Up to 5455 conditions per place. [2024-06-27 23:12:16,919 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 362 selfloop transitions, 92 changer transitions 0/459 dead transitions. [2024-06-27 23:12:16,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 459 transitions, 7066 flow [2024-06-27 23:12:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:12:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:12:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-27 23:12:16,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:12:16,921 INFO L175 Difference]: Start difference. First operand has 257 places, 402 transitions, 5502 flow. Second operand 12 states and 234 transitions. [2024-06-27 23:12:16,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 459 transitions, 7066 flow [2024-06-27 23:12:17,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 459 transitions, 6883 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:17,569 INFO L231 Difference]: Finished difference. Result has 262 places, 406 transitions, 5699 flow [2024-06-27 23:12:17,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5699, PETRI_PLACES=262, PETRI_TRANSITIONS=406} [2024-06-27 23:12:17,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 23:12:17,570 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 406 transitions, 5699 flow [2024-06-27 23:12:17,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:17,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:17,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:17,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:12:17,571 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:17,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash -452187650, now seen corresponding path program 12 times [2024-06-27 23:12:17,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:17,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442335787] [2024-06-27 23:12:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:17,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:18,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442335787] [2024-06-27 23:12:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442335787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:18,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:18,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:18,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553127661] [2024-06-27 23:12:18,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:18,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:18,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:18,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:18,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:18,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 406 transitions, 5699 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:18,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:18,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:18,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:20,430 INFO L124 PetriNetUnfolderBase]: 3921/6399 cut-off events. [2024-06-27 23:12:20,430 INFO L125 PetriNetUnfolderBase]: For 519129/519131 co-relation queries the response was YES. [2024-06-27 23:12:20,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50131 conditions, 6399 events. 3921/6399 cut-off events. For 519129/519131 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41240 event pairs, 1040 based on Foata normal form. 22/6419 useless extension candidates. Maximal degree in co-relation 50007. Up to 5633 conditions per place. [2024-06-27 23:12:20,506 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 361 selfloop transitions, 87 changer transitions 0/453 dead transitions. [2024-06-27 23:12:20,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 453 transitions, 6835 flow [2024-06-27 23:12:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:12:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:12:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-27 23:12:20,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:12:20,507 INFO L175 Difference]: Start difference. First operand has 262 places, 406 transitions, 5699 flow. Second operand 12 states and 228 transitions. [2024-06-27 23:12:20,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 453 transitions, 6835 flow [2024-06-27 23:12:21,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 453 transitions, 6663 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:21,398 INFO L231 Difference]: Finished difference. Result has 266 places, 406 transitions, 5713 flow [2024-06-27 23:12:21,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5527, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5713, PETRI_PLACES=266, PETRI_TRANSITIONS=406} [2024-06-27 23:12:21,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 23:12:21,399 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 406 transitions, 5713 flow [2024-06-27 23:12:21,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:21,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:21,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:21,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:12:21,399 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:21,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1156404828, now seen corresponding path program 13 times [2024-06-27 23:12:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:21,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261447505] [2024-06-27 23:12:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:22,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:22,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261447505] [2024-06-27 23:12:22,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261447505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:22,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:22,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:12:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860807260] [2024-06-27 23:12:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:12:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:12:22,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:12:22,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:12:22,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 406 transitions, 5713 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:22,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:22,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:12:22,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:24,010 INFO L124 PetriNetUnfolderBase]: 3523/6225 cut-off events. [2024-06-27 23:12:24,011 INFO L125 PetriNetUnfolderBase]: For 613811/614049 co-relation queries the response was YES. [2024-06-27 23:12:24,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51638 conditions, 6225 events. 3523/6225 cut-off events. For 613811/614049 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44715 event pairs, 488 based on Foata normal form. 65/6158 useless extension candidates. Maximal degree in co-relation 51512. Up to 3460 conditions per place. [2024-06-27 23:12:24,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 125 changer transitions 0/462 dead transitions. [2024-06-27 23:12:24,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 462 transitions, 7281 flow [2024-06-27 23:12:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:12:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:12:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-27 23:12:24,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-06-27 23:12:24,101 INFO L175 Difference]: Start difference. First operand has 266 places, 406 transitions, 5713 flow. Second operand 11 states and 238 transitions. [2024-06-27 23:12:24,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 462 transitions, 7281 flow [2024-06-27 23:12:25,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 462 transitions, 7094 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 23:12:25,131 INFO L231 Difference]: Finished difference. Result has 267 places, 414 transitions, 6103 flow [2024-06-27 23:12:25,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6103, PETRI_PLACES=267, PETRI_TRANSITIONS=414} [2024-06-27 23:12:25,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 23:12:25,132 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 414 transitions, 6103 flow [2024-06-27 23:12:25,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:25,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:25,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:25,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:12:25,132 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:25,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 913425494, now seen corresponding path program 14 times [2024-06-27 23:12:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82749719] [2024-06-27 23:12:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:26,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:26,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82749719] [2024-06-27 23:12:26,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82749719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:26,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:26,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:26,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282356845] [2024-06-27 23:12:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:26,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:26,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:26,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:26,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 414 transitions, 6103 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:26,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:26,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:26,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:28,392 INFO L124 PetriNetUnfolderBase]: 4709/7758 cut-off events. [2024-06-27 23:12:28,393 INFO L125 PetriNetUnfolderBase]: For 668438/668440 co-relation queries the response was YES. [2024-06-27 23:12:28,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62637 conditions, 7758 events. 4709/7758 cut-off events. For 668438/668440 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 52612 event pairs, 1235 based on Foata normal form. 26/7782 useless extension candidates. Maximal degree in co-relation 62509. Up to 6121 conditions per place. [2024-06-27 23:12:28,480 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 377 selfloop transitions, 92 changer transitions 0/474 dead transitions. [2024-06-27 23:12:28,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 474 transitions, 7879 flow [2024-06-27 23:12:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:12:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:12:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 23:12:28,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 23:12:28,489 INFO L175 Difference]: Start difference. First operand has 267 places, 414 transitions, 6103 flow. Second operand 11 states and 217 transitions. [2024-06-27 23:12:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 474 transitions, 7879 flow [2024-06-27 23:12:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 474 transitions, 7614 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:29,423 INFO L231 Difference]: Finished difference. Result has 271 places, 423 transitions, 6428 flow [2024-06-27 23:12:29,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6428, PETRI_PLACES=271, PETRI_TRANSITIONS=423} [2024-06-27 23:12:29,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-27 23:12:29,424 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 423 transitions, 6428 flow [2024-06-27 23:12:29,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:29,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:29,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:29,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:12:29,425 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:29,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash -928977130, now seen corresponding path program 15 times [2024-06-27 23:12:29,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:29,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429256220] [2024-06-27 23:12:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:29,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:30,730 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 23:12:30,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:30,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429256220] [2024-06-27 23:12:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429256220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:30,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:30,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:30,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024213334] [2024-06-27 23:12:30,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:30,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:30,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:30,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:30,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:30,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:30,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 423 transitions, 6428 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:30,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:30,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:30,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:32,932 INFO L124 PetriNetUnfolderBase]: 4843/7994 cut-off events. [2024-06-27 23:12:32,933 INFO L125 PetriNetUnfolderBase]: For 673192/673194 co-relation queries the response was YES. [2024-06-27 23:12:32,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64085 conditions, 7994 events. 4843/7994 cut-off events. For 673192/673194 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54557 event pairs, 1334 based on Foata normal form. 34/8026 useless extension candidates. Maximal degree in co-relation 63957. Up to 6587 conditions per place. [2024-06-27 23:12:33,030 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 388 selfloop transitions, 77 changer transitions 0/470 dead transitions. [2024-06-27 23:12:33,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 470 transitions, 8005 flow [2024-06-27 23:12:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:12:33,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 23:12:33,032 INFO L175 Difference]: Start difference. First operand has 271 places, 423 transitions, 6428 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:12:33,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 470 transitions, 8005 flow [2024-06-27 23:12:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 470 transitions, 7748 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:34,253 INFO L231 Difference]: Finished difference. Result has 273 places, 426 transitions, 6528 flow [2024-06-27 23:12:34,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6528, PETRI_PLACES=273, PETRI_TRANSITIONS=426} [2024-06-27 23:12:34,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 23:12:34,255 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 426 transitions, 6528 flow [2024-06-27 23:12:34,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:34,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:34,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:34,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:12:34,256 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:34,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1692392780, now seen corresponding path program 16 times [2024-06-27 23:12:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:34,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234200112] [2024-06-27 23:12:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:34,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234200112] [2024-06-27 23:12:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234200112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:35,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:35,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:35,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599804593] [2024-06-27 23:12:35,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:35,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:35,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:35,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 426 transitions, 6528 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:35,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:37,482 INFO L124 PetriNetUnfolderBase]: 4761/7883 cut-off events. [2024-06-27 23:12:37,483 INFO L125 PetriNetUnfolderBase]: For 611072/611074 co-relation queries the response was YES. [2024-06-27 23:12:37,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59616 conditions, 7883 events. 4761/7883 cut-off events. For 611072/611074 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 53911 event pairs, 1402 based on Foata normal form. 42/7923 useless extension candidates. Maximal degree in co-relation 59487. Up to 6912 conditions per place. [2024-06-27 23:12:37,581 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 391 selfloop transitions, 66 changer transitions 0/462 dead transitions. [2024-06-27 23:12:37,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 462 transitions, 7609 flow [2024-06-27 23:12:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:12:37,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 23:12:37,583 INFO L175 Difference]: Start difference. First operand has 273 places, 426 transitions, 6528 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:12:37,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 462 transitions, 7609 flow [2024-06-27 23:12:38,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 462 transitions, 7236 flow, removed 109 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:38,818 INFO L231 Difference]: Finished difference. Result has 275 places, 426 transitions, 6304 flow [2024-06-27 23:12:38,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6304, PETRI_PLACES=275, PETRI_TRANSITIONS=426} [2024-06-27 23:12:38,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 23:12:38,819 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 426 transitions, 6304 flow [2024-06-27 23:12:38,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:38,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:38,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:12:38,819 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:38,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1836283310, now seen corresponding path program 17 times [2024-06-27 23:12:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:38,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069801472] [2024-06-27 23:12:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:40,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:40,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069801472] [2024-06-27 23:12:40,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069801472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:40,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:40,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:40,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026213314] [2024-06-27 23:12:40,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:40,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:40,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:40,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:40,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:40,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 426 transitions, 6304 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:40,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:40,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:40,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:42,248 INFO L124 PetriNetUnfolderBase]: 4885/8055 cut-off events. [2024-06-27 23:12:42,248 INFO L125 PetriNetUnfolderBase]: For 553392/553394 co-relation queries the response was YES. [2024-06-27 23:12:42,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59378 conditions, 8055 events. 4885/8055 cut-off events. For 553392/553394 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 55134 event pairs, 1233 based on Foata normal form. 20/8073 useless extension candidates. Maximal degree in co-relation 59248. Up to 6769 conditions per place. [2024-06-27 23:12:42,329 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 279 selfloop transitions, 189 changer transitions 0/473 dead transitions. [2024-06-27 23:12:42,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 473 transitions, 7575 flow [2024-06-27 23:12:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 23:12:42,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-27 23:12:42,331 INFO L175 Difference]: Start difference. First operand has 275 places, 426 transitions, 6304 flow. Second operand 10 states and 203 transitions. [2024-06-27 23:12:42,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 473 transitions, 7575 flow [2024-06-27 23:12:43,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 473 transitions, 7403 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 23:12:43,233 INFO L231 Difference]: Finished difference. Result has 275 places, 428 transitions, 6603 flow [2024-06-27 23:12:43,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6603, PETRI_PLACES=275, PETRI_TRANSITIONS=428} [2024-06-27 23:12:43,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 23:12:43,233 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 428 transitions, 6603 flow [2024-06-27 23:12:43,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:43,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:43,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:43,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:12:43,234 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:43,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1830920930, now seen corresponding path program 18 times [2024-06-27 23:12:43,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:43,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392245922] [2024-06-27 23:12:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:43,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:44,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:44,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392245922] [2024-06-27 23:12:44,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392245922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:44,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:44,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:44,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152176585] [2024-06-27 23:12:44,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:44,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:44,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:44,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 428 transitions, 6603 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:44,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:44,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:44,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:46,709 INFO L124 PetriNetUnfolderBase]: 5009/8269 cut-off events. [2024-06-27 23:12:46,709 INFO L125 PetriNetUnfolderBase]: For 549622/549624 co-relation queries the response was YES. [2024-06-27 23:12:46,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61079 conditions, 8269 events. 5009/8269 cut-off events. For 549622/549624 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56943 event pairs, 1263 based on Foata normal form. 20/8287 useless extension candidates. Maximal degree in co-relation 60949. Up to 6973 conditions per place. [2024-06-27 23:12:46,804 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 288 selfloop transitions, 183 changer transitions 0/476 dead transitions. [2024-06-27 23:12:46,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 476 transitions, 7886 flow [2024-06-27 23:12:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 23:12:46,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 23:12:46,806 INFO L175 Difference]: Start difference. First operand has 275 places, 428 transitions, 6603 flow. Second operand 10 states and 205 transitions. [2024-06-27 23:12:46,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 476 transitions, 7886 flow [2024-06-27 23:12:47,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 476 transitions, 7472 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:47,943 INFO L231 Difference]: Finished difference. Result has 277 places, 430 transitions, 6650 flow [2024-06-27 23:12:47,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6650, PETRI_PLACES=277, PETRI_TRANSITIONS=430} [2024-06-27 23:12:47,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 23:12:47,944 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 430 transitions, 6650 flow [2024-06-27 23:12:47,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:47,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:47,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:47,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:12:47,944 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:47,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1830773060, now seen corresponding path program 19 times [2024-06-27 23:12:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006533964] [2024-06-27 23:12:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:49,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:49,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006533964] [2024-06-27 23:12:49,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006533964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:49,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:49,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:49,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278243083] [2024-06-27 23:12:49,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:49,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:49,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:49,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:49,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 430 transitions, 6650 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:49,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:49,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:49,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:51,225 INFO L124 PetriNetUnfolderBase]: 5055/8357 cut-off events. [2024-06-27 23:12:51,225 INFO L125 PetriNetUnfolderBase]: For 537266/537268 co-relation queries the response was YES. [2024-06-27 23:12:51,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60909 conditions, 8357 events. 5055/8357 cut-off events. For 537266/537268 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 57700 event pairs, 1209 based on Foata normal form. 16/8371 useless extension candidates. Maximal degree in co-relation 60778. Up to 6695 conditions per place. [2024-06-27 23:12:51,376 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 287 selfloop transitions, 189 changer transitions 0/481 dead transitions. [2024-06-27 23:12:51,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 481 transitions, 7953 flow [2024-06-27 23:12:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-27 23:12:51,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-27 23:12:51,378 INFO L175 Difference]: Start difference. First operand has 277 places, 430 transitions, 6650 flow. Second operand 10 states and 207 transitions. [2024-06-27 23:12:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 481 transitions, 7953 flow [2024-06-27 23:12:52,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 481 transitions, 7551 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:52,971 INFO L231 Difference]: Finished difference. Result has 279 places, 432 transitions, 6715 flow [2024-06-27 23:12:52,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6715, PETRI_PLACES=279, PETRI_TRANSITIONS=432} [2024-06-27 23:12:52,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 23:12:52,972 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 432 transitions, 6715 flow [2024-06-27 23:12:52,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:52,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:52,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:52,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:12:52,972 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:52,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1836498791, now seen corresponding path program 6 times [2024-06-27 23:12:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:52,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670075311] [2024-06-27 23:12:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670075311] [2024-06-27 23:12:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670075311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:54,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:54,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639140323] [2024-06-27 23:12:54,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:54,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:54,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:54,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:12:54,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 432 transitions, 6715 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:54,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:54,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:12:54,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:56,716 INFO L124 PetriNetUnfolderBase]: 5058/8390 cut-off events. [2024-06-27 23:12:56,716 INFO L125 PetriNetUnfolderBase]: For 514376/514380 co-relation queries the response was YES. [2024-06-27 23:12:56,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60607 conditions, 8390 events. 5058/8390 cut-off events. For 514376/514380 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 58276 event pairs, 1762 based on Foata normal form. 6/8394 useless extension candidates. Maximal degree in co-relation 60475. Up to 7688 conditions per place. [2024-06-27 23:12:56,803 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 375 selfloop transitions, 91 changer transitions 0/471 dead transitions. [2024-06-27 23:12:56,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 471 transitions, 7861 flow [2024-06-27 23:12:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 23:12:56,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 23:12:56,805 INFO L175 Difference]: Start difference. First operand has 279 places, 432 transitions, 6715 flow. Second operand 10 states and 194 transitions. [2024-06-27 23:12:56,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 471 transitions, 7861 flow [2024-06-27 23:12:57,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 471 transitions, 7405 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:57,779 INFO L231 Difference]: Finished difference. Result has 282 places, 435 transitions, 6485 flow [2024-06-27 23:12:57,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6485, PETRI_PLACES=282, PETRI_TRANSITIONS=435} [2024-06-27 23:12:57,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 23:12:57,780 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 435 transitions, 6485 flow [2024-06-27 23:12:57,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:57,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:57,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:57,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:12:57,780 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:57,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1162713192, now seen corresponding path program 4 times [2024-06-27 23:12:57,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663278392] [2024-06-27 23:12:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:57,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:59,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:59,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663278392] [2024-06-27 23:12:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663278392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:59,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:59,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:12:59,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972300176] [2024-06-27 23:12:59,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:59,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:12:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:12:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:12:59,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:12:59,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 435 transitions, 6485 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:59,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:59,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:12:59,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:01,054 INFO L124 PetriNetUnfolderBase]: 4564/7784 cut-off events. [2024-06-27 23:13:01,054 INFO L125 PetriNetUnfolderBase]: For 512328/512376 co-relation queries the response was YES. [2024-06-27 23:13:01,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56259 conditions, 7784 events. 4564/7784 cut-off events. For 512328/512376 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 56342 event pairs, 1390 based on Foata normal form. 8/7649 useless extension candidates. Maximal degree in co-relation 56125. Up to 6902 conditions per place. [2024-06-27 23:13:01,165 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 47 changer transitions 0/456 dead transitions. [2024-06-27 23:13:01,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 456 transitions, 7311 flow [2024-06-27 23:13:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:13:01,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:13:01,166 INFO L175 Difference]: Start difference. First operand has 282 places, 435 transitions, 6485 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:13:01,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 456 transitions, 7311 flow [2024-06-27 23:13:02,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 456 transitions, 7017 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-27 23:13:02,404 INFO L231 Difference]: Finished difference. Result has 278 places, 438 transitions, 6319 flow [2024-06-27 23:13:02,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6319, PETRI_PLACES=278, PETRI_TRANSITIONS=438} [2024-06-27 23:13:02,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 23:13:02,405 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 438 transitions, 6319 flow [2024-06-27 23:13:02,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:02,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:02,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:02,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:13:02,406 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:02,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1727004865, now seen corresponding path program 1 times [2024-06-27 23:13:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:02,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585136261] [2024-06-27 23:13:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:03,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:03,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585136261] [2024-06-27 23:13:03,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585136261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:03,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:03,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153842829] [2024-06-27 23:13:03,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:03,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:03,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:03,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:03,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 438 transitions, 6319 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:03,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:03,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:03,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:05,069 INFO L124 PetriNetUnfolderBase]: 5067/8396 cut-off events. [2024-06-27 23:13:05,070 INFO L125 PetriNetUnfolderBase]: For 517272/517272 co-relation queries the response was YES. [2024-06-27 23:13:05,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59606 conditions, 8396 events. 5067/8396 cut-off events. For 517272/517272 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 58323 event pairs, 2196 based on Foata normal form. 1/8395 useless extension candidates. Maximal degree in co-relation 59474. Up to 7913 conditions per place. [2024-06-27 23:13:05,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 435 selfloop transitions, 16 changer transitions 0/456 dead transitions. [2024-06-27 23:13:05,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 456 transitions, 7337 flow [2024-06-27 23:13:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 23:13:05,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 23:13:05,181 INFO L175 Difference]: Start difference. First operand has 278 places, 438 transitions, 6319 flow. Second operand 8 states and 137 transitions. [2024-06-27 23:13:05,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 456 transitions, 7337 flow [2024-06-27 23:13:06,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 456 transitions, 7221 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:13:06,296 INFO L231 Difference]: Finished difference. Result has 279 places, 441 transitions, 6283 flow [2024-06-27 23:13:06,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6283, PETRI_PLACES=279, PETRI_TRANSITIONS=441} [2024-06-27 23:13:06,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 23:13:06,297 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 441 transitions, 6283 flow [2024-06-27 23:13:06,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:06,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:06,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:06,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:13:06,297 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:06,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:06,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1726855135, now seen corresponding path program 2 times [2024-06-27 23:13:06,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:06,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638773939] [2024-06-27 23:13:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:06,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:07,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638773939] [2024-06-27 23:13:07,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638773939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:07,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:07,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985734887] [2024-06-27 23:13:07,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:07,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:07,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:07,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:07,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 441 transitions, 6283 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:07,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:07,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:07,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:09,004 INFO L124 PetriNetUnfolderBase]: 5072/8417 cut-off events. [2024-06-27 23:13:09,004 INFO L125 PetriNetUnfolderBase]: For 529010/529010 co-relation queries the response was YES. [2024-06-27 23:13:09,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60420 conditions, 8417 events. 5072/8417 cut-off events. For 529010/529010 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 58571 event pairs, 2196 based on Foata normal form. 1/8416 useless extension candidates. Maximal degree in co-relation 60287. Up to 7914 conditions per place. [2024-06-27 23:13:09,098 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 21 changer transitions 0/456 dead transitions. [2024-06-27 23:13:09,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 456 transitions, 7285 flow [2024-06-27 23:13:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:13:09,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:13:09,100 INFO L175 Difference]: Start difference. First operand has 279 places, 441 transitions, 6283 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:13:09,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 456 transitions, 7285 flow [2024-06-27 23:13:10,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 456 transitions, 7227 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:10,175 INFO L231 Difference]: Finished difference. Result has 281 places, 444 transitions, 6321 flow [2024-06-27 23:13:10,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6321, PETRI_PLACES=281, PETRI_TRANSITIONS=444} [2024-06-27 23:13:10,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 23:13:10,175 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 444 transitions, 6321 flow [2024-06-27 23:13:10,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:10,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:10,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:10,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:13:10,176 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:10,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1726854918, now seen corresponding path program 1 times [2024-06-27 23:13:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:10,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425282259] [2024-06-27 23:13:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:10,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:11,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:11,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425282259] [2024-06-27 23:13:11,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425282259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:11,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:11,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:13:11,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670765858] [2024-06-27 23:13:11,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:11,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:13:11,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:11,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:13:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:13:11,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:13:11,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 444 transitions, 6321 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:11,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:11,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:13:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:13,570 INFO L124 PetriNetUnfolderBase]: 4988/8339 cut-off events. [2024-06-27 23:13:13,570 INFO L125 PetriNetUnfolderBase]: For 549057/549057 co-relation queries the response was YES. [2024-06-27 23:13:13,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60861 conditions, 8339 events. 4988/8339 cut-off events. For 549057/549057 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 58578 event pairs, 2163 based on Foata normal form. 3/8340 useless extension candidates. Maximal degree in co-relation 60727. Up to 7742 conditions per place. [2024-06-27 23:13:13,701 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 16 changer transitions 0/460 dead transitions. [2024-06-27 23:13:13,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 460 transitions, 7331 flow [2024-06-27 23:13:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:13:13,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 23:13:13,703 INFO L175 Difference]: Start difference. First operand has 281 places, 444 transitions, 6321 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:13:13,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 460 transitions, 7331 flow [2024-06-27 23:13:14,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 460 transitions, 7257 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:14,873 INFO L231 Difference]: Finished difference. Result has 283 places, 447 transitions, 6345 flow [2024-06-27 23:13:14,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6345, PETRI_PLACES=283, PETRI_TRANSITIONS=447} [2024-06-27 23:13:14,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 23:13:14,874 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 447 transitions, 6345 flow [2024-06-27 23:13:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:14,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:14,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:14,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:13:14,874 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:14,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash -824070019, now seen corresponding path program 3 times [2024-06-27 23:13:14,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:14,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857536645] [2024-06-27 23:13:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:14,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:16,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:16,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857536645] [2024-06-27 23:13:16,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857536645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:16,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:16,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:16,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728248205] [2024-06-27 23:13:16,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:16,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:16,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:16,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 447 transitions, 6345 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:16,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:16,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:16,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:17,863 INFO L124 PetriNetUnfolderBase]: 5084/8435 cut-off events. [2024-06-27 23:13:17,864 INFO L125 PetriNetUnfolderBase]: For 552442/552444 co-relation queries the response was YES. [2024-06-27 23:13:17,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61782 conditions, 8435 events. 5084/8435 cut-off events. For 552442/552444 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 58760 event pairs, 2203 based on Foata normal form. 1/8434 useless extension candidates. Maximal degree in co-relation 61647. Up to 7922 conditions per place. [2024-06-27 23:13:17,974 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 28 changer transitions 0/459 dead transitions. [2024-06-27 23:13:17,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 459 transitions, 7339 flow [2024-06-27 23:13:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 23:13:17,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 23:13:17,975 INFO L175 Difference]: Start difference. First operand has 283 places, 447 transitions, 6345 flow. Second operand 8 states and 135 transitions. [2024-06-27 23:13:17,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 459 transitions, 7339 flow [2024-06-27 23:13:19,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 459 transitions, 7265 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:19,043 INFO L231 Difference]: Finished difference. Result has 285 places, 450 transitions, 6389 flow [2024-06-27 23:13:19,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6389, PETRI_PLACES=285, PETRI_TRANSITIONS=450} [2024-06-27 23:13:19,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 23:13:19,044 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 450 transitions, 6389 flow [2024-06-27 23:13:19,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:19,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:19,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:19,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:13:19,044 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:19,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash -824069802, now seen corresponding path program 2 times [2024-06-27 23:13:19,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:19,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005383403] [2024-06-27 23:13:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:19,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:20,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:20,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005383403] [2024-06-27 23:13:20,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005383403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:20,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:20,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:13:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673927754] [2024-06-27 23:13:20,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:20,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:13:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:13:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:13:20,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:20,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 450 transitions, 6389 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:20,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:20,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:20,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:22,376 INFO L124 PetriNetUnfolderBase]: 5089/8442 cut-off events. [2024-06-27 23:13:22,376 INFO L125 PetriNetUnfolderBase]: For 565841/565843 co-relation queries the response was YES. [2024-06-27 23:13:22,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62605 conditions, 8442 events. 5089/8442 cut-off events. For 565841/565843 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 58768 event pairs, 2200 based on Foata normal form. 3/8443 useless extension candidates. Maximal degree in co-relation 62469. Up to 7944 conditions per place. [2024-06-27 23:13:22,489 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 21 changer transitions 0/462 dead transitions. [2024-06-27 23:13:22,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 462 transitions, 7405 flow [2024-06-27 23:13:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:13:22,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 23:13:22,490 INFO L175 Difference]: Start difference. First operand has 285 places, 450 transitions, 6389 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:13:22,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 462 transitions, 7405 flow [2024-06-27 23:13:23,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 462 transitions, 7309 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:23,718 INFO L231 Difference]: Finished difference. Result has 287 places, 453 transitions, 6413 flow [2024-06-27 23:13:23,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6413, PETRI_PLACES=287, PETRI_TRANSITIONS=453} [2024-06-27 23:13:23,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 23:13:23,719 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 453 transitions, 6413 flow [2024-06-27 23:13:23,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:23,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:23,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:23,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:13:23,720 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:23,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash -823802892, now seen corresponding path program 3 times [2024-06-27 23:13:23,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:23,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222115163] [2024-06-27 23:13:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:23,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:25,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:25,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222115163] [2024-06-27 23:13:25,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222115163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:25,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:25,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:25,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108955918] [2024-06-27 23:13:25,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:25,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:25,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 453 transitions, 6413 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:25,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:25,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:25,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:27,277 INFO L124 PetriNetUnfolderBase]: 5086/8438 cut-off events. [2024-06-27 23:13:27,277 INFO L125 PetriNetUnfolderBase]: For 575293/575295 co-relation queries the response was YES. [2024-06-27 23:13:27,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62873 conditions, 8438 events. 5086/8438 cut-off events. For 575293/575295 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 58817 event pairs, 2200 based on Foata normal form. 3/8439 useless extension candidates. Maximal degree in co-relation 62736. Up to 7931 conditions per place. [2024-06-27 23:13:27,712 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 29 changer transitions 0/468 dead transitions. [2024-06-27 23:13:27,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 468 transitions, 7469 flow [2024-06-27 23:13:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:13:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:13:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 23:13:27,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 23:13:27,713 INFO L175 Difference]: Start difference. First operand has 287 places, 453 transitions, 6413 flow. Second operand 7 states and 124 transitions. [2024-06-27 23:13:27,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 468 transitions, 7469 flow [2024-06-27 23:13:28,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 468 transitions, 7371 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:28,772 INFO L231 Difference]: Finished difference. Result has 289 places, 459 transitions, 6495 flow [2024-06-27 23:13:28,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6315, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6495, PETRI_PLACES=289, PETRI_TRANSITIONS=459} [2024-06-27 23:13:28,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 23:13:28,772 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 459 transitions, 6495 flow [2024-06-27 23:13:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:28,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:28,773 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 23:13:28,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:13:28,773 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:28,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1198814192, now seen corresponding path program 1 times [2024-06-27 23:13:28,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:28,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127883412] [2024-06-27 23:13:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:29,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:29,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127883412] [2024-06-27 23:13:29,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127883412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:29,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:29,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:29,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55988949] [2024-06-27 23:13:29,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:29,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:29,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:29,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:29,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 459 transitions, 6495 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:29,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:29,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:29,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:31,794 INFO L124 PetriNetUnfolderBase]: 5091/8449 cut-off events. [2024-06-27 23:13:31,795 INFO L125 PetriNetUnfolderBase]: For 590059/590063 co-relation queries the response was YES. [2024-06-27 23:13:31,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63367 conditions, 8449 events. 5091/8449 cut-off events. For 590059/590063 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 58835 event pairs, 1767 based on Foata normal form. 5/8451 useless extension candidates. Maximal degree in co-relation 63228. Up to 7894 conditions per place. [2024-06-27 23:13:31,889 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 39 changer transitions 0/477 dead transitions. [2024-06-27 23:13:31,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 477 transitions, 7573 flow [2024-06-27 23:13:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:13:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:13:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:13:31,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 23:13:31,891 INFO L175 Difference]: Start difference. First operand has 289 places, 459 transitions, 6495 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:13:31,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 477 transitions, 7573 flow [2024-06-27 23:13:33,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 477 transitions, 7482 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 23:13:33,129 INFO L231 Difference]: Finished difference. Result has 293 places, 462 transitions, 6562 flow [2024-06-27 23:13:33,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6562, PETRI_PLACES=293, PETRI_TRANSITIONS=462} [2024-06-27 23:13:33,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 23:13:33,129 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 462 transitions, 6562 flow [2024-06-27 23:13:33,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:33,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:33,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:33,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:13:33,131 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:33,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1205480432, now seen corresponding path program 2 times [2024-06-27 23:13:33,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:33,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054741400] [2024-06-27 23:13:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:33,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:34,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:34,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054741400] [2024-06-27 23:13:34,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054741400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:34,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:34,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427683200] [2024-06-27 23:13:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:34,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:34,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 462 transitions, 6562 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:34,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:34,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:34,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:36,064 INFO L124 PetriNetUnfolderBase]: 5104/8471 cut-off events. [2024-06-27 23:13:36,065 INFO L125 PetriNetUnfolderBase]: For 606897/606901 co-relation queries the response was YES. [2024-06-27 23:13:36,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64155 conditions, 8471 events. 5104/8471 cut-off events. For 606897/606901 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 58965 event pairs, 1763 based on Foata normal form. 5/8473 useless extension candidates. Maximal degree in co-relation 64014. Up to 7895 conditions per place. [2024-06-27 23:13:36,225 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 47 changer transitions 0/485 dead transitions. [2024-06-27 23:13:36,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 485 transitions, 7904 flow [2024-06-27 23:13:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:13:36,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 23:13:36,227 INFO L175 Difference]: Start difference. First operand has 293 places, 462 transitions, 6562 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:13:36,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 485 transitions, 7904 flow [2024-06-27 23:13:38,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 485 transitions, 7772 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:13:38,086 INFO L231 Difference]: Finished difference. Result has 297 places, 472 transitions, 6742 flow [2024-06-27 23:13:38,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6742, PETRI_PLACES=297, PETRI_TRANSITIONS=472} [2024-06-27 23:13:38,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 23:13:38,087 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 472 transitions, 6742 flow [2024-06-27 23:13:38,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:38,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:38,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:13:38,088 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:38,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1384660227, now seen corresponding path program 1 times [2024-06-27 23:13:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:38,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728953680] [2024-06-27 23:13:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:38,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728953680] [2024-06-27 23:13:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728953680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:39,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:13:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971674352] [2024-06-27 23:13:39,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:13:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:13:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:13:40,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:40,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 472 transitions, 6742 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:40,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:40,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:40,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:42,151 INFO L124 PetriNetUnfolderBase]: 5430/9072 cut-off events. [2024-06-27 23:13:42,152 INFO L125 PetriNetUnfolderBase]: For 659746/659748 co-relation queries the response was YES. [2024-06-27 23:13:42,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68029 conditions, 9072 events. 5430/9072 cut-off events. For 659746/659748 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 64595 event pairs, 1455 based on Foata normal form. 12/9080 useless extension candidates. Maximal degree in co-relation 67886. Up to 7167 conditions per place. [2024-06-27 23:13:42,279 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 332 selfloop transitions, 210 changer transitions 0/547 dead transitions. [2024-06-27 23:13:42,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 547 transitions, 8651 flow [2024-06-27 23:13:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:13:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:13:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 23:13:42,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-06-27 23:13:42,282 INFO L175 Difference]: Start difference. First operand has 297 places, 472 transitions, 6742 flow. Second operand 11 states and 211 transitions. [2024-06-27 23:13:42,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 547 transitions, 8651 flow [2024-06-27 23:13:43,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 547 transitions, 8534 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 23:13:43,777 INFO L231 Difference]: Finished difference. Result has 306 places, 503 transitions, 7665 flow [2024-06-27 23:13:43,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6625, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7665, PETRI_PLACES=306, PETRI_TRANSITIONS=503} [2024-06-27 23:13:43,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 23:13:43,778 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 503 transitions, 7665 flow [2024-06-27 23:13:43,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:43,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:43,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:13:43,779 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:43,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1028543346, now seen corresponding path program 1 times [2024-06-27 23:13:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84261670] [2024-06-27 23:13:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:45,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:45,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84261670] [2024-06-27 23:13:45,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84261670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:45,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:45,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:13:45,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496329386] [2024-06-27 23:13:45,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:45,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:13:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:45,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:13:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:13:46,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:13:46,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 503 transitions, 7665 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:46,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:46,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:13:46,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:48,022 INFO L124 PetriNetUnfolderBase]: 4968/8485 cut-off events. [2024-06-27 23:13:48,023 INFO L125 PetriNetUnfolderBase]: For 671662/671712 co-relation queries the response was YES. [2024-06-27 23:13:48,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66735 conditions, 8485 events. 4968/8485 cut-off events. For 671662/671712 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 62355 event pairs, 1433 based on Foata normal form. 11/8346 useless extension candidates. Maximal degree in co-relation 66588. Up to 7457 conditions per place. [2024-06-27 23:13:48,138 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 56 changer transitions 0/522 dead transitions. [2024-06-27 23:13:48,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 522 transitions, 8629 flow [2024-06-27 23:13:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:13:48,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 23:13:48,139 INFO L175 Difference]: Start difference. First operand has 306 places, 503 transitions, 7665 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:13:48,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 522 transitions, 8629 flow [2024-06-27 23:13:49,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 522 transitions, 8263 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:49,733 INFO L231 Difference]: Finished difference. Result has 308 places, 506 transitions, 7477 flow [2024-06-27 23:13:49,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7299, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7477, PETRI_PLACES=308, PETRI_TRANSITIONS=506} [2024-06-27 23:13:49,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 23:13:49,734 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 506 transitions, 7477 flow [2024-06-27 23:13:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:49,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:49,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:49,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:13:49,734 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:49,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1601347754, now seen corresponding path program 3 times [2024-06-27 23:13:49,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:49,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296890564] [2024-06-27 23:13:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:49,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296890564] [2024-06-27 23:13:50,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296890564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:50,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:50,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:50,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434199595] [2024-06-27 23:13:50,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:50,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:50,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:50,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:50,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 506 transitions, 7477 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:50,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:50,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:50,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:52,716 INFO L124 PetriNetUnfolderBase]: 5447/9102 cut-off events. [2024-06-27 23:13:52,716 INFO L125 PetriNetUnfolderBase]: For 659435/659439 co-relation queries the response was YES. [2024-06-27 23:13:52,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69702 conditions, 9102 events. 5447/9102 cut-off events. For 659435/659439 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 64814 event pairs, 1820 based on Foata normal form. 5/9103 useless extension candidates. Maximal degree in co-relation 69554. Up to 8492 conditions per place. [2024-06-27 23:13:52,839 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 477 selfloop transitions, 40 changer transitions 0/522 dead transitions. [2024-06-27 23:13:52,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 522 transitions, 8606 flow [2024-06-27 23:13:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:13:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:13:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:13:52,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 23:13:52,840 INFO L175 Difference]: Start difference. First operand has 308 places, 506 transitions, 7477 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:13:52,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 522 transitions, 8606 flow [2024-06-27 23:13:54,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 522 transitions, 8402 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:54,351 INFO L231 Difference]: Finished difference. Result has 309 places, 507 transitions, 7377 flow [2024-06-27 23:13:54,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7281, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7377, PETRI_PLACES=309, PETRI_TRANSITIONS=507} [2024-06-27 23:13:54,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 23:13:54,352 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 507 transitions, 7377 flow [2024-06-27 23:13:54,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:54,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:54,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:54,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:13:54,352 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:54,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:54,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1887663120, now seen corresponding path program 4 times [2024-06-27 23:13:54,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:54,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084942708] [2024-06-27 23:13:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:54,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:55,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:55,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084942708] [2024-06-27 23:13:55,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084942708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:55,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:55,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938043847] [2024-06-27 23:13:55,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:55,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:55,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:55,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:55,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:55,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 507 transitions, 7377 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:55,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:55,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:55,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:57,265 INFO L124 PetriNetUnfolderBase]: 5460/9119 cut-off events. [2024-06-27 23:13:57,265 INFO L125 PetriNetUnfolderBase]: For 676040/676044 co-relation queries the response was YES. [2024-06-27 23:13:57,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69948 conditions, 9119 events. 5460/9119 cut-off events. For 676040/676044 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 64929 event pairs, 1820 based on Foata normal form. 5/9121 useless extension candidates. Maximal degree in co-relation 69799. Up to 8493 conditions per place. [2024-06-27 23:13:57,389 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 51 changer transitions 0/526 dead transitions. [2024-06-27 23:13:57,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 526 transitions, 8797 flow [2024-06-27 23:13:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:13:57,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 23:13:57,391 INFO L175 Difference]: Start difference. First operand has 309 places, 507 transitions, 7377 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:13:57,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 526 transitions, 8797 flow [2024-06-27 23:13:58,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 526 transitions, 8712 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 23:13:58,777 INFO L231 Difference]: Finished difference. Result has 312 places, 513 transitions, 7562 flow [2024-06-27 23:13:58,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7292, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7562, PETRI_PLACES=312, PETRI_TRANSITIONS=513} [2024-06-27 23:13:58,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 23:13:58,778 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 513 transitions, 7562 flow [2024-06-27 23:13:58,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:58,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:58,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:58,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:13:58,779 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:58,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash 217912304, now seen corresponding path program 5 times [2024-06-27 23:13:58,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:58,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122395702] [2024-06-27 23:13:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:58,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122395702] [2024-06-27 23:13:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122395702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:59,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:59,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:13:59,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443905742] [2024-06-27 23:13:59,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:13:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:13:59,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:13:59,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:13:59,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 513 transitions, 7562 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:59,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:59,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:13:59,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:01,901 INFO L124 PetriNetUnfolderBase]: 5473/9146 cut-off events. [2024-06-27 23:14:01,901 INFO L125 PetriNetUnfolderBase]: For 697085/697091 co-relation queries the response was YES. [2024-06-27 23:14:01,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70748 conditions, 9146 events. 5473/9146 cut-off events. For 697085/697091 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 65171 event pairs, 1822 based on Foata normal form. 7/9150 useless extension candidates. Maximal degree in co-relation 70598. Up to 8477 conditions per place. [2024-06-27 23:14:02,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 462 selfloop transitions, 70 changer transitions 0/537 dead transitions. [2024-06-27 23:14:02,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 537 transitions, 9276 flow [2024-06-27 23:14:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:14:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:14:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:14:02,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 23:14:02,031 INFO L175 Difference]: Start difference. First operand has 312 places, 513 transitions, 7562 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:14:02,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 537 transitions, 9276 flow [2024-06-27 23:14:03,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 537 transitions, 9147 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 23:14:03,702 INFO L231 Difference]: Finished difference. Result has 318 places, 525 transitions, 7914 flow [2024-06-27 23:14:03,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7433, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7914, PETRI_PLACES=318, PETRI_TRANSITIONS=525} [2024-06-27 23:14:03,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 23:14:03,703 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 525 transitions, 7914 flow [2024-06-27 23:14:03,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:03,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:03,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:14:03,703 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:03,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash 223626224, now seen corresponding path program 6 times [2024-06-27 23:14:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:03,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124832037] [2024-06-27 23:14:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:04,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124832037] [2024-06-27 23:14:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124832037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:04,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:04,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:14:04,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746483383] [2024-06-27 23:14:04,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:04,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:14:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:14:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:14:04,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:14:04,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 525 transitions, 7914 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:04,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:04,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:14:04,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:07,100 INFO L124 PetriNetUnfolderBase]: 5470/9136 cut-off events. [2024-06-27 23:14:07,100 INFO L125 PetriNetUnfolderBase]: For 711102/711108 co-relation queries the response was YES. [2024-06-27 23:14:07,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71222 conditions, 9136 events. 5470/9136 cut-off events. For 711102/711108 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 65021 event pairs, 1816 based on Foata normal form. 7/9140 useless extension candidates. Maximal degree in co-relation 71068. Up to 8474 conditions per place. [2024-06-27 23:14:07,209 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 74 changer transitions 0/539 dead transitions. [2024-06-27 23:14:07,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 539 transitions, 9412 flow [2024-06-27 23:14:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:14:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:14:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:14:07,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 23:14:07,210 INFO L175 Difference]: Start difference. First operand has 318 places, 525 transitions, 7914 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:14:07,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 539 transitions, 9412 flow [2024-06-27 23:14:08,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 539 transitions, 9181 flow, removed 98 selfloop flow, removed 3 redundant places. [2024-06-27 23:14:08,824 INFO L231 Difference]: Finished difference. Result has 324 places, 528 transitions, 7935 flow [2024-06-27 23:14:08,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7707, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7935, PETRI_PLACES=324, PETRI_TRANSITIONS=528} [2024-06-27 23:14:08,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 23:14:08,824 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 528 transitions, 7935 flow [2024-06-27 23:14:08,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:08,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:08,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:08,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:14:08,825 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:08,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:08,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1953905545, now seen corresponding path program 2 times [2024-06-27 23:14:08,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:08,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285159028] [2024-06-27 23:14:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:08,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:10,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:10,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285159028] [2024-06-27 23:14:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285159028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:10,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:10,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211271381] [2024-06-27 23:14:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:10,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:14:10,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 528 transitions, 7935 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:10,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:10,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:14:10,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:13,388 INFO L124 PetriNetUnfolderBase]: 5587/9339 cut-off events. [2024-06-27 23:14:13,388 INFO L125 PetriNetUnfolderBase]: For 753761/753761 co-relation queries the response was YES. [2024-06-27 23:14:13,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72357 conditions, 9339 events. 5587/9339 cut-off events. For 753761/753761 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 66706 event pairs, 1354 based on Foata normal form. 12/9347 useless extension candidates. Maximal degree in co-relation 72200. Up to 7924 conditions per place. [2024-06-27 23:14:13,523 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 350 selfloop transitions, 248 changer transitions 0/603 dead transitions. [2024-06-27 23:14:13,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 603 transitions, 9845 flow [2024-06-27 23:14:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:14:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:14:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 23:14:13,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 23:14:13,525 INFO L175 Difference]: Start difference. First operand has 324 places, 528 transitions, 7935 flow. Second operand 11 states and 207 transitions. [2024-06-27 23:14:13,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 603 transitions, 9845 flow [2024-06-27 23:14:15,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 603 transitions, 9740 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:14:15,190 INFO L231 Difference]: Finished difference. Result has 333 places, 561 transitions, 8840 flow [2024-06-27 23:14:15,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7830, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8840, PETRI_PLACES=333, PETRI_TRANSITIONS=561} [2024-06-27 23:14:15,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 23:14:15,190 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 561 transitions, 8840 flow [2024-06-27 23:14:15,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:15,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:15,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:14:15,191 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:15,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash 512146539, now seen corresponding path program 3 times [2024-06-27 23:14:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071089767] [2024-06-27 23:14:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:15,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:17,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:17,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071089767] [2024-06-27 23:14:17,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071089767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:17,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:17,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381023371] [2024-06-27 23:14:17,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:17,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:17,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:17,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:17,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:14:17,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 561 transitions, 8840 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:17,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:17,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:14:17,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:20,166 INFO L124 PetriNetUnfolderBase]: 5996/10136 cut-off events. [2024-06-27 23:14:20,166 INFO L125 PetriNetUnfolderBase]: For 791168/791168 co-relation queries the response was YES. [2024-06-27 23:14:20,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78264 conditions, 10136 events. 5996/10136 cut-off events. For 791168/791168 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 74589 event pairs, 1384 based on Foata normal form. 12/10144 useless extension candidates. Maximal degree in co-relation 78104. Up to 6830 conditions per place. [2024-06-27 23:14:20,358 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 334 selfloop transitions, 277 changer transitions 0/616 dead transitions. [2024-06-27 23:14:20,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 616 transitions, 10852 flow [2024-06-27 23:14:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:14:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:14:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 23:14:20,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 23:14:20,360 INFO L175 Difference]: Start difference. First operand has 333 places, 561 transitions, 8840 flow. Second operand 11 states and 208 transitions. [2024-06-27 23:14:20,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 616 transitions, 10852 flow [2024-06-27 23:14:22,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 616 transitions, 10487 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 23:14:22,674 INFO L231 Difference]: Finished difference. Result has 340 places, 572 transitions, 9452 flow [2024-06-27 23:14:22,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8475, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9452, PETRI_PLACES=340, PETRI_TRANSITIONS=572} [2024-06-27 23:14:22,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-27 23:14:22,675 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 572 transitions, 9452 flow [2024-06-27 23:14:22,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:22,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:22,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:22,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:14:22,675 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:22,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1107988279, now seen corresponding path program 4 times [2024-06-27 23:14:22,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:22,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905042120] [2024-06-27 23:14:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:22,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:24,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905042120] [2024-06-27 23:14:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905042120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:24,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157426450] [2024-06-27 23:14:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:24,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:24,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:14:24,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 572 transitions, 9452 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:24,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:24,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:14:24,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:27,746 INFO L124 PetriNetUnfolderBase]: 6037/10217 cut-off events. [2024-06-27 23:14:27,746 INFO L125 PetriNetUnfolderBase]: For 811193/811193 co-relation queries the response was YES. [2024-06-27 23:14:27,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79044 conditions, 10217 events. 6037/10217 cut-off events. For 811193/811193 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 75619 event pairs, 1591 based on Foata normal form. 12/10225 useless extension candidates. Maximal degree in co-relation 78882. Up to 8600 conditions per place. [2024-06-27 23:14:27,904 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 384 selfloop transitions, 228 changer transitions 0/617 dead transitions. [2024-06-27 23:14:27,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 617 transitions, 11068 flow [2024-06-27 23:14:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:14:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:14:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 23:14:27,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:14:27,906 INFO L175 Difference]: Start difference. First operand has 340 places, 572 transitions, 9452 flow. Second operand 11 states and 209 transitions. [2024-06-27 23:14:27,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 617 transitions, 11068 flow [2024-06-27 23:14:30,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 617 transitions, 10533 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 23:14:30,168 INFO L231 Difference]: Finished difference. Result has 344 places, 574 transitions, 9485 flow [2024-06-27 23:14:30,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8926, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9485, PETRI_PLACES=344, PETRI_TRANSITIONS=574} [2024-06-27 23:14:30,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 23:14:30,169 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 574 transitions, 9485 flow [2024-06-27 23:14:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:30,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:30,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:30,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:14:30,169 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:30,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:30,170 INFO L85 PathProgramCache]: Analyzing trace with hash 609166135, now seen corresponding path program 5 times [2024-06-27 23:14:30,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:30,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60670344] [2024-06-27 23:14:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:30,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:32,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:32,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60670344] [2024-06-27 23:14:32,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60670344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:32,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:32,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16245561] [2024-06-27 23:14:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:32,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:32,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:32,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:14:32,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 574 transitions, 9485 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:32,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:32,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:14:32,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:35,108 INFO L124 PetriNetUnfolderBase]: 6078/10294 cut-off events. [2024-06-27 23:14:35,109 INFO L125 PetriNetUnfolderBase]: For 826701/826701 co-relation queries the response was YES. [2024-06-27 23:14:35,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79352 conditions, 10294 events. 6078/10294 cut-off events. For 826701/826701 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 76277 event pairs, 1566 based on Foata normal form. 12/10302 useless extension candidates. Maximal degree in co-relation 79188. Up to 8769 conditions per place. [2024-06-27 23:14:35,313 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 367 selfloop transitions, 243 changer transitions 0/615 dead transitions. [2024-06-27 23:14:35,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 615 transitions, 11044 flow [2024-06-27 23:14:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:14:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:14:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 23:14:35,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 23:14:35,314 INFO L175 Difference]: Start difference. First operand has 344 places, 574 transitions, 9485 flow. Second operand 11 states and 208 transitions. [2024-06-27 23:14:35,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 615 transitions, 11044 flow [2024-06-27 23:14:38,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 615 transitions, 10549 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 23:14:38,413 INFO L231 Difference]: Finished difference. Result has 349 places, 576 transitions, 9587 flow [2024-06-27 23:14:38,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8990, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9587, PETRI_PLACES=349, PETRI_TRANSITIONS=576} [2024-06-27 23:14:38,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 23:14:38,414 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 576 transitions, 9587 flow [2024-06-27 23:14:38,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:38,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:38,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:38,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:14:38,414 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:38,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:38,415 INFO L85 PathProgramCache]: Analyzing trace with hash 217921232, now seen corresponding path program 2 times [2024-06-27 23:14:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:38,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747434205] [2024-06-27 23:14:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:40,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:40,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747434205] [2024-06-27 23:14:40,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747434205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:40,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:40,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737182875] [2024-06-27 23:14:40,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:40,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:40,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:14:40,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 576 transitions, 9587 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:40,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:40,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:14:40,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:42,823 INFO L124 PetriNetUnfolderBase]: 5563/9590 cut-off events. [2024-06-27 23:14:42,823 INFO L125 PetriNetUnfolderBase]: For 815870/815934 co-relation queries the response was YES. [2024-06-27 23:14:42,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75315 conditions, 9590 events. 5563/9590 cut-off events. For 815870/815934 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 72983 event pairs, 1576 based on Foata normal form. 11/9410 useless extension candidates. Maximal degree in co-relation 75150. Up to 8478 conditions per place. [2024-06-27 23:14:42,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 58 changer transitions 0/589 dead transitions. [2024-06-27 23:14:42,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 589 transitions, 10629 flow [2024-06-27 23:14:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:14:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:14:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:14:42,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:14:42,973 INFO L175 Difference]: Start difference. First operand has 349 places, 576 transitions, 9587 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:14:42,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 589 transitions, 10629 flow [2024-06-27 23:14:45,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 589 transitions, 10115 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 23:14:45,192 INFO L231 Difference]: Finished difference. Result has 350 places, 579 transitions, 9253 flow [2024-06-27 23:14:45,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9073, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9253, PETRI_PLACES=350, PETRI_TRANSITIONS=579} [2024-06-27 23:14:45,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-27 23:14:45,193 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 579 transitions, 9253 flow [2024-06-27 23:14:45,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:45,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:45,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:45,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:14:45,194 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:45,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash -807440882, now seen corresponding path program 3 times [2024-06-27 23:14:45,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:45,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380904670] [2024-06-27 23:14:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:45,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380904670] [2024-06-27 23:14:47,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380904670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:47,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:47,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:47,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615778313] [2024-06-27 23:14:47,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:47,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:47,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:47,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:14:47,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 579 transitions, 9253 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:47,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:47,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:14:47,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:49,951 INFO L124 PetriNetUnfolderBase]: 5574/9572 cut-off events. [2024-06-27 23:14:49,951 INFO L125 PetriNetUnfolderBase]: For 857131/857285 co-relation queries the response was YES. [2024-06-27 23:14:50,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74888 conditions, 9572 events. 5574/9572 cut-off events. For 857131/857285 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 73076 event pairs, 2308 based on Foata normal form. 35/9393 useless extension candidates. Maximal degree in co-relation 74723. Up to 8555 conditions per place. [2024-06-27 23:14:50,127 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 19 changer transitions 0/594 dead transitions. [2024-06-27 23:14:50,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 594 transitions, 10323 flow [2024-06-27 23:14:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:14:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:14:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:14:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:14:50,129 INFO L175 Difference]: Start difference. First operand has 350 places, 579 transitions, 9253 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:14:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 594 transitions, 10323 flow [2024-06-27 23:14:52,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 594 transitions, 10165 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 23:14:52,231 INFO L231 Difference]: Finished difference. Result has 353 places, 582 transitions, 9207 flow [2024-06-27 23:14:52,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9207, PETRI_PLACES=353, PETRI_TRANSITIONS=582} [2024-06-27 23:14:52,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 23:14:52,232 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 582 transitions, 9207 flow [2024-06-27 23:14:52,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:52,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:52,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:52,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:14:52,233 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:52,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:52,234 INFO L85 PathProgramCache]: Analyzing trace with hash 231730802, now seen corresponding path program 4 times [2024-06-27 23:14:52,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:52,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937915723] [2024-06-27 23:14:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:52,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:54,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:54,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937915723] [2024-06-27 23:14:54,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937915723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:54,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:54,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:14:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481951345] [2024-06-27 23:14:54,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:54,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:14:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:14:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:14:54,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:14:54,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 582 transitions, 9207 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:54,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:54,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:14:54,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:57,084 INFO L124 PetriNetUnfolderBase]: 5572/9606 cut-off events. [2024-06-27 23:14:57,084 INFO L125 PetriNetUnfolderBase]: For 838303/838383 co-relation queries the response was YES. [2024-06-27 23:14:57,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75501 conditions, 9606 events. 5572/9606 cut-off events. For 838303/838383 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 73202 event pairs, 1539 based on Foata normal form. 15/9428 useless extension candidates. Maximal degree in co-relation 75335. Up to 8423 conditions per place. [2024-06-27 23:14:57,230 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 409 selfloop transitions, 80 changer transitions 0/602 dead transitions. [2024-06-27 23:14:57,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 602 transitions, 10553 flow [2024-06-27 23:14:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:14:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:14:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 23:14:57,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-27 23:14:57,231 INFO L175 Difference]: Start difference. First operand has 353 places, 582 transitions, 9207 flow. Second operand 7 states and 152 transitions. [2024-06-27 23:14:57,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 602 transitions, 10553 flow [2024-06-27 23:14:59,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 602 transitions, 10467 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 23:14:59,702 INFO L231 Difference]: Finished difference. Result has 353 places, 588 transitions, 9429 flow [2024-06-27 23:14:59,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9121, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9429, PETRI_PLACES=353, PETRI_TRANSITIONS=588} [2024-06-27 23:14:59,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 23:14:59,703 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 588 transitions, 9429 flow [2024-06-27 23:14:59,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:59,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:59,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:59,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:14:59,732 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:59,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1522629230, now seen corresponding path program 7 times [2024-06-27 23:14:59,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:59,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521577479] [2024-06-27 23:14:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:59,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:00,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521577479] [2024-06-27 23:15:00,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521577479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:00,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:00,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:15:00,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279142090] [2024-06-27 23:15:00,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:00,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:15:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:15:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:15:00,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:15:00,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 588 transitions, 9429 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:00,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:00,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:15:00,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:03,363 INFO L124 PetriNetUnfolderBase]: 6114/10355 cut-off events. [2024-06-27 23:15:03,364 INFO L125 PetriNetUnfolderBase]: For 839996/840000 co-relation queries the response was YES. [2024-06-27 23:15:03,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80258 conditions, 10355 events. 6114/10355 cut-off events. For 839996/840000 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 77012 event pairs, 2008 based on Foata normal form. 5/10358 useless extension candidates. Maximal degree in co-relation 80092. Up to 9614 conditions per place. [2024-06-27 23:15:03,537 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 44 changer transitions 0/612 dead transitions. [2024-06-27 23:15:03,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 612 transitions, 10783 flow [2024-06-27 23:15:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:15:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:15:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:15:03,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:15:03,538 INFO L175 Difference]: Start difference. First operand has 353 places, 588 transitions, 9429 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:15:03,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 612 transitions, 10783 flow [2024-06-27 23:15:07,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 612 transitions, 10599 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 23:15:07,168 INFO L231 Difference]: Finished difference. Result has 358 places, 591 transitions, 9391 flow [2024-06-27 23:15:07,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9245, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9391, PETRI_PLACES=358, PETRI_TRANSITIONS=591} [2024-06-27 23:15:07,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 23:15:07,178 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 591 transitions, 9391 flow [2024-06-27 23:15:07,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:07,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:07,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:07,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:15:07,179 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:07,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1096888969, now seen corresponding path program 6 times [2024-06-27 23:15:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:07,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150466579] [2024-06-27 23:15:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150466579] [2024-06-27 23:15:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150466579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:09,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:09,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:15:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346011990] [2024-06-27 23:15:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:15:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:15:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:15:09,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:15:09,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 591 transitions, 9391 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:09,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:09,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:15:09,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:12,739 INFO L124 PetriNetUnfolderBase]: 6121/10371 cut-off events. [2024-06-27 23:15:12,739 INFO L125 PetriNetUnfolderBase]: For 850245/850247 co-relation queries the response was YES. [2024-06-27 23:15:12,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79335 conditions, 10371 events. 6121/10371 cut-off events. For 850245/850247 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 77216 event pairs, 1564 based on Foata normal form. 12/10381 useless extension candidates. Maximal degree in co-relation 79166. Up to 8159 conditions per place. [2024-06-27 23:15:12,882 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 385 selfloop transitions, 253 changer transitions 0/643 dead transitions. [2024-06-27 23:15:12,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 643 transitions, 10933 flow [2024-06-27 23:15:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:15:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:15:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 23:15:12,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-06-27 23:15:12,884 INFO L175 Difference]: Start difference. First operand has 358 places, 591 transitions, 9391 flow. Second operand 10 states and 209 transitions. [2024-06-27 23:15:12,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 643 transitions, 10933 flow [2024-06-27 23:15:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 643 transitions, 10839 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:15:16,207 INFO L231 Difference]: Finished difference. Result has 363 places, 592 transitions, 9747 flow [2024-06-27 23:15:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9169, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9747, PETRI_PLACES=363, PETRI_TRANSITIONS=592} [2024-06-27 23:15:16,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 23:15:16,210 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 592 transitions, 9747 flow [2024-06-27 23:15:16,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:16,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:16,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:15:16,211 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:16,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1684378322, now seen corresponding path program 8 times [2024-06-27 23:15:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135993889] [2024-06-27 23:15:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135993889] [2024-06-27 23:15:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135993889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:17,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:17,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:15:17,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035028162] [2024-06-27 23:15:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:17,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:15:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:15:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:15:17,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:15:17,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 592 transitions, 9747 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:17,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:17,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:15:17,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:19,822 INFO L124 PetriNetUnfolderBase]: 6133/10395 cut-off events. [2024-06-27 23:15:19,822 INFO L125 PetriNetUnfolderBase]: For 832459/832463 co-relation queries the response was YES. [2024-06-27 23:15:19,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80447 conditions, 10395 events. 6133/10395 cut-off events. For 832459/832463 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 77426 event pairs, 2050 based on Foata normal form. 5/10398 useless extension candidates. Maximal degree in co-relation 80277. Up to 9626 conditions per place. [2024-06-27 23:15:19,974 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 556 selfloop transitions, 59 changer transitions 0/620 dead transitions. [2024-06-27 23:15:19,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 620 transitions, 11178 flow [2024-06-27 23:15:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:15:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:15:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 23:15:19,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 23:15:19,975 INFO L175 Difference]: Start difference. First operand has 363 places, 592 transitions, 9747 flow. Second operand 7 states and 137 transitions. [2024-06-27 23:15:19,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 620 transitions, 11178 flow [2024-06-27 23:15:23,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 620 transitions, 10362 flow, removed 45 selfloop flow, removed 10 redundant places. [2024-06-27 23:15:23,153 INFO L231 Difference]: Finished difference. Result has 361 places, 602 transitions, 9228 flow [2024-06-27 23:15:23,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8931, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9228, PETRI_PLACES=361, PETRI_TRANSITIONS=602} [2024-06-27 23:15:23,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 23:15:23,154 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 602 transitions, 9228 flow [2024-06-27 23:15:23,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:23,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:23,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:23,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:15:23,155 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:23,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1376030704, now seen corresponding path program 1 times [2024-06-27 23:15:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:23,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155524778] [2024-06-27 23:15:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:23,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:24,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:24,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155524778] [2024-06-27 23:15:24,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155524778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:24,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:24,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:15:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006592087] [2024-06-27 23:15:24,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:24,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:15:24,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:24,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:15:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:15:24,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:15:24,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 602 transitions, 9228 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:24,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:24,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:15:24,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:27,025 INFO L124 PetriNetUnfolderBase]: 6045/10303 cut-off events. [2024-06-27 23:15:27,025 INFO L125 PetriNetUnfolderBase]: For 840300/840302 co-relation queries the response was YES. [2024-06-27 23:15:27,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77930 conditions, 10303 events. 6045/10303 cut-off events. For 840300/840302 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 77293 event pairs, 2556 based on Foata normal form. 3/10296 useless extension candidates. Maximal degree in co-relation 77761. Up to 9495 conditions per place. [2024-06-27 23:15:27,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 590 selfloop transitions, 19 changer transitions 0/624 dead transitions. [2024-06-27 23:15:27,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 624 transitions, 10614 flow [2024-06-27 23:15:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:15:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:15:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 23:15:27,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 23:15:27,185 INFO L175 Difference]: Start difference. First operand has 361 places, 602 transitions, 9228 flow. Second operand 9 states and 161 transitions. [2024-06-27 23:15:27,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 624 transitions, 10614 flow [2024-06-27 23:15:29,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 624 transitions, 10452 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:15:29,694 INFO L231 Difference]: Finished difference. Result has 364 places, 605 transitions, 9180 flow [2024-06-27 23:15:29,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9066, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9180, PETRI_PLACES=364, PETRI_TRANSITIONS=605} [2024-06-27 23:15:29,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 23:15:29,694 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 605 transitions, 9180 flow [2024-06-27 23:15:29,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:29,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:29,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:29,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:15:29,695 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:29,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:29,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1997542104, now seen corresponding path program 1 times [2024-06-27 23:15:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421835353] [2024-06-27 23:15:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421835353] [2024-06-27 23:15:31,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421835353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:15:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914633717] [2024-06-27 23:15:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:15:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:15:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:15:31,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:15:31,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 605 transitions, 9180 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:31,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:31,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:15:31,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:33,614 INFO L124 PetriNetUnfolderBase]: 6148/10412 cut-off events. [2024-06-27 23:15:33,614 INFO L125 PetriNetUnfolderBase]: For 859821/859821 co-relation queries the response was YES. [2024-06-27 23:15:33,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79390 conditions, 10412 events. 6148/10412 cut-off events. For 859821/859821 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 77566 event pairs, 2584 based on Foata normal form. 2/10412 useless extension candidates. Maximal degree in co-relation 79219. Up to 9699 conditions per place. [2024-06-27 23:15:33,809 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 595 selfloop transitions, 25 changer transitions 0/625 dead transitions. [2024-06-27 23:15:33,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 625 transitions, 10572 flow [2024-06-27 23:15:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:15:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:15:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:15:33,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 23:15:33,811 INFO L175 Difference]: Start difference. First operand has 364 places, 605 transitions, 9180 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:15:33,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 625 transitions, 10572 flow [2024-06-27 23:15:36,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 625 transitions, 10480 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 23:15:36,983 INFO L231 Difference]: Finished difference. Result has 365 places, 609 transitions, 9224 flow [2024-06-27 23:15:36,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9088, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9224, PETRI_PLACES=365, PETRI_TRANSITIONS=609} [2024-06-27 23:15:36,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 23:15:36,983 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 609 transitions, 9224 flow [2024-06-27 23:15:36,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:36,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:36,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:36,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:15:36,984 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:36,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1892296814, now seen corresponding path program 2 times [2024-06-27 23:15:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:36,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119087552] [2024-06-27 23:15:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:38,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:38,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119087552] [2024-06-27 23:15:38,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119087552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:38,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:38,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:15:38,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947807715] [2024-06-27 23:15:38,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:38,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:15:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:38,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:15:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:15:38,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:15:38,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 609 transitions, 9224 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:38,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:38,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:15:38,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:40,860 INFO L124 PetriNetUnfolderBase]: 6153/10421 cut-off events. [2024-06-27 23:15:40,861 INFO L125 PetriNetUnfolderBase]: For 875630/875630 co-relation queries the response was YES. [2024-06-27 23:15:40,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80804 conditions, 10421 events. 6153/10421 cut-off events. For 875630/875630 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 77668 event pairs, 2584 based on Foata normal form. 1/10420 useless extension candidates. Maximal degree in co-relation 80632. Up to 9709 conditions per place. [2024-06-27 23:15:41,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 599 selfloop transitions, 24 changer transitions 0/628 dead transitions. [2024-06-27 23:15:41,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 628 transitions, 10626 flow [2024-06-27 23:15:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:15:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:15:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:15:41,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 23:15:41,033 INFO L175 Difference]: Start difference. First operand has 365 places, 609 transitions, 9224 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:15:41,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 628 transitions, 10626 flow [2024-06-27 23:15:43,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 628 transitions, 10520 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 23:15:43,381 INFO L231 Difference]: Finished difference. Result has 367 places, 612 transitions, 9252 flow [2024-06-27 23:15:43,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9252, PETRI_PLACES=367, PETRI_TRANSITIONS=612} [2024-06-27 23:15:43,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 23:15:43,382 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 612 transitions, 9252 flow [2024-06-27 23:15:43,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:43,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:43,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:43,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:15:43,382 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:43,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1887654998, now seen corresponding path program 2 times [2024-06-27 23:15:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:43,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206966665] [2024-06-27 23:15:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:43,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206966665] [2024-06-27 23:15:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206966665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:44,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:44,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:15:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041472314] [2024-06-27 23:15:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:15:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:15:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:15:45,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:15:45,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 612 transitions, 9252 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:45,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:45,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:15:45,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:47,512 INFO L124 PetriNetUnfolderBase]: 6094/10366 cut-off events. [2024-06-27 23:15:47,512 INFO L125 PetriNetUnfolderBase]: For 906881/906883 co-relation queries the response was YES. [2024-06-27 23:15:47,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81430 conditions, 10366 events. 6094/10366 cut-off events. For 906881/906883 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 77738 event pairs, 2558 based on Foata normal form. 5/10361 useless extension candidates. Maximal degree in co-relation 81257. Up to 9535 conditions per place. [2024-06-27 23:15:47,675 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 584 selfloop transitions, 29 changer transitions 0/629 dead transitions. [2024-06-27 23:15:47,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 629 transitions, 10604 flow [2024-06-27 23:15:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:15:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:15:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:15:47,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:15:47,676 INFO L175 Difference]: Start difference. First operand has 367 places, 612 transitions, 9252 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:15:47,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 629 transitions, 10604 flow [2024-06-27 23:15:50,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 629 transitions, 10492 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 23:15:50,691 INFO L231 Difference]: Finished difference. Result has 370 places, 615 transitions, 9272 flow [2024-06-27 23:15:50,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9140, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9272, PETRI_PLACES=370, PETRI_TRANSITIONS=615} [2024-06-27 23:15:50,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 23:15:50,692 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 615 transitions, 9272 flow [2024-06-27 23:15:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:50,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:50,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:50,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:15:50,693 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:50,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1887655184, now seen corresponding path program 3 times [2024-06-27 23:15:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:50,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606459755] [2024-06-27 23:15:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:50,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:52,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:52,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606459755] [2024-06-27 23:15:52,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606459755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:52,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:52,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:15:52,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182651723] [2024-06-27 23:15:52,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:52,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:15:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:15:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:15:52,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:15:52,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 615 transitions, 9272 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:52,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:52,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:15:52,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:15:54,971 INFO L124 PetriNetUnfolderBase]: 6099/10375 cut-off events. [2024-06-27 23:15:54,971 INFO L125 PetriNetUnfolderBase]: For 915871/915873 co-relation queries the response was YES. [2024-06-27 23:15:55,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82251 conditions, 10375 events. 6099/10375 cut-off events. For 915871/915873 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 77774 event pairs, 2558 based on Foata normal form. 3/10368 useless extension candidates. Maximal degree in co-relation 82077. Up to 9542 conditions per place. [2024-06-27 23:15:55,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 584 selfloop transitions, 31 changer transitions 0/631 dead transitions. [2024-06-27 23:15:55,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 631 transitions, 10644 flow [2024-06-27 23:15:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:15:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:15:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:15:55,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:15:55,168 INFO L175 Difference]: Start difference. First operand has 370 places, 615 transitions, 9272 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:15:55,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 631 transitions, 10644 flow [2024-06-27 23:15:58,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 631 transitions, 10542 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 23:15:58,093 INFO L231 Difference]: Finished difference. Result has 372 places, 618 transitions, 9326 flow [2024-06-27 23:15:58,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9326, PETRI_PLACES=372, PETRI_TRANSITIONS=618} [2024-06-27 23:15:58,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 23:15:58,094 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 618 transitions, 9326 flow [2024-06-27 23:15:58,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:58,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:15:58,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:15:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:15:58,094 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:15:58,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:15:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1887648488, now seen corresponding path program 3 times [2024-06-27 23:15:58,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:15:58,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455778281] [2024-06-27 23:15:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:15:58,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:15:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:15:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:15:59,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:15:59,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455778281] [2024-06-27 23:15:59,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455778281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:15:59,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:15:59,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:15:59,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810899502] [2024-06-27 23:15:59,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:15:59,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:15:59,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:15:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:15:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:15:59,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:15:59,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 618 transitions, 9326 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:15:59,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:15:59,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:15:59,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:02,420 INFO L124 PetriNetUnfolderBase]: 6144/10438 cut-off events. [2024-06-27 23:16:02,421 INFO L125 PetriNetUnfolderBase]: For 965773/965775 co-relation queries the response was YES. [2024-06-27 23:16:02,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84125 conditions, 10438 events. 6144/10438 cut-off events. For 965773/965775 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 78218 event pairs, 2560 based on Foata normal form. 5/10433 useless extension candidates. Maximal degree in co-relation 83950. Up to 9568 conditions per place. [2024-06-27 23:16:02,588 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 582 selfloop transitions, 43 changer transitions 0/641 dead transitions. [2024-06-27 23:16:02,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 641 transitions, 11002 flow [2024-06-27 23:16:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:16:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:16:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:16:02,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:16:02,589 INFO L175 Difference]: Start difference. First operand has 372 places, 618 transitions, 9326 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:16:02,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 641 transitions, 11002 flow [2024-06-27 23:16:05,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 641 transitions, 10868 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 23:16:05,370 INFO L231 Difference]: Finished difference. Result has 375 places, 625 transitions, 9470 flow [2024-06-27 23:16:05,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9192, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9470, PETRI_PLACES=375, PETRI_TRANSITIONS=625} [2024-06-27 23:16:05,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-27 23:16:05,370 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 625 transitions, 9470 flow [2024-06-27 23:16:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:05,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:05,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:05,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:16:05,371 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:05,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:05,371 INFO L85 PathProgramCache]: Analyzing trace with hash 223634160, now seen corresponding path program 4 times [2024-06-27 23:16:05,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:05,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178256318] [2024-06-27 23:16:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:05,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178256318] [2024-06-27 23:16:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178256318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:06,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:06,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:16:06,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383060017] [2024-06-27 23:16:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:06,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:16:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:06,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:16:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:16:06,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:16:06,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 625 transitions, 9470 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:06,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:06,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:16:06,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:09,599 INFO L124 PetriNetUnfolderBase]: 6141/10435 cut-off events. [2024-06-27 23:16:09,599 INFO L125 PetriNetUnfolderBase]: For 977515/977519 co-relation queries the response was YES. [2024-06-27 23:16:09,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85418 conditions, 10435 events. 6141/10435 cut-off events. For 977515/977519 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 78218 event pairs, 2576 based on Foata normal form. 3/10428 useless extension candidates. Maximal degree in co-relation 85241. Up to 9587 conditions per place. [2024-06-27 23:16:09,775 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 582 selfloop transitions, 40 changer transitions 0/638 dead transitions. [2024-06-27 23:16:09,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 638 transitions, 10844 flow [2024-06-27 23:16:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 23:16:09,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:16:09,776 INFO L175 Difference]: Start difference. First operand has 375 places, 625 transitions, 9470 flow. Second operand 8 states and 147 transitions. [2024-06-27 23:16:09,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 638 transitions, 10844 flow [2024-06-27 23:16:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 638 transitions, 10749 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:13,090 INFO L231 Difference]: Finished difference. Result has 378 places, 628 transitions, 9559 flow [2024-06-27 23:16:13,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9375, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9559, PETRI_PLACES=378, PETRI_TRANSITIONS=628} [2024-06-27 23:16:13,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 23:16:13,094 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 628 transitions, 9559 flow [2024-06-27 23:16:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:13,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:13,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:13,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:16:13,095 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:13,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash 223634346, now seen corresponding path program 4 times [2024-06-27 23:16:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:13,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012595431] [2024-06-27 23:16:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:15,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012595431] [2024-06-27 23:16:15,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012595431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:15,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:15,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:16:15,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236252391] [2024-06-27 23:16:15,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:16:15,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:16:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:16:15,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:16:15,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 628 transitions, 9559 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:15,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:15,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:16:15,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:17,693 INFO L124 PetriNetUnfolderBase]: 6222/10520 cut-off events. [2024-06-27 23:16:17,693 INFO L125 PetriNetUnfolderBase]: For 993423/993425 co-relation queries the response was YES. [2024-06-27 23:16:17,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86748 conditions, 10520 events. 6222/10520 cut-off events. For 993423/993425 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 78366 event pairs, 2605 based on Foata normal form. 1/10519 useless extension candidates. Maximal degree in co-relation 86569. Up to 9790 conditions per place. [2024-06-27 23:16:17,876 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 600 selfloop transitions, 36 changer transitions 0/641 dead transitions. [2024-06-27 23:16:17,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 641 transitions, 10947 flow [2024-06-27 23:16:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:16:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:16:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 23:16:17,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 23:16:17,877 INFO L175 Difference]: Start difference. First operand has 378 places, 628 transitions, 9559 flow. Second operand 9 states and 150 transitions. [2024-06-27 23:16:17,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 641 transitions, 10947 flow [2024-06-27 23:16:20,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 641 transitions, 10785 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 23:16:20,870 INFO L231 Difference]: Finished difference. Result has 381 places, 631 transitions, 9559 flow [2024-06-27 23:16:20,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9559, PETRI_PLACES=381, PETRI_TRANSITIONS=631} [2024-06-27 23:16:20,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 23:16:20,870 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 631 transitions, 9559 flow [2024-06-27 23:16:20,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:20,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:20,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:20,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:16:20,871 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:20,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash 223641104, now seen corresponding path program 1 times [2024-06-27 23:16:20,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:20,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898833316] [2024-06-27 23:16:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:23,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898833316] [2024-06-27 23:16:23,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898833316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:23,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:23,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:16:23,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005804318] [2024-06-27 23:16:23,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:23,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:16:23,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:23,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:16:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:16:23,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:16:23,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 631 transitions, 9559 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:23,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:23,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:16:23,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:26,367 INFO L124 PetriNetUnfolderBase]: 6227/10527 cut-off events. [2024-06-27 23:16:26,367 INFO L125 PetriNetUnfolderBase]: For 1014335/1014337 co-relation queries the response was YES. [2024-06-27 23:16:26,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87523 conditions, 10527 events. 6227/10527 cut-off events. For 1014335/1014337 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 78343 event pairs, 2592 based on Foata normal form. 3/10528 useless extension candidates. Maximal degree in co-relation 87343. Up to 9824 conditions per place. [2024-06-27 23:16:26,546 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 615 selfloop transitions, 24 changer transitions 0/644 dead transitions. [2024-06-27 23:16:26,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 644 transitions, 10961 flow [2024-06-27 23:16:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:16:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:16:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 23:16:26,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 23:16:26,548 INFO L175 Difference]: Start difference. First operand has 381 places, 631 transitions, 9559 flow. Second operand 9 states and 146 transitions. [2024-06-27 23:16:26,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 644 transitions, 10961 flow [2024-06-27 23:16:29,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 644 transitions, 10821 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 23:16:29,957 INFO L231 Difference]: Finished difference. Result has 383 places, 634 transitions, 9565 flow [2024-06-27 23:16:29,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9419, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9565, PETRI_PLACES=383, PETRI_TRANSITIONS=634} [2024-06-27 23:16:29,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 23:16:29,957 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 634 transitions, 9565 flow [2024-06-27 23:16:29,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:29,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:29,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:29,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:16:29,958 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:29,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash 223640856, now seen corresponding path program 5 times [2024-06-27 23:16:29,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:29,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632849725] [2024-06-27 23:16:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:29,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632849725] [2024-06-27 23:16:31,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632849725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:31,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:31,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:16:31,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218218939] [2024-06-27 23:16:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:31,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:16:31,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:16:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:16:31,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:16:31,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 634 transitions, 9565 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:31,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:31,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:16:31,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:34,385 INFO L124 PetriNetUnfolderBase]: 6190/10506 cut-off events. [2024-06-27 23:16:34,385 INFO L125 PetriNetUnfolderBase]: For 1060320/1060324 co-relation queries the response was YES. [2024-06-27 23:16:34,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88508 conditions, 10506 events. 6190/10506 cut-off events. For 1060320/1060324 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 78705 event pairs, 2577 based on Foata normal form. 5/10501 useless extension candidates. Maximal degree in co-relation 88327. Up to 9633 conditions per place. [2024-06-27 23:16:34,561 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 592 selfloop transitions, 45 changer transitions 0/654 dead transitions. [2024-06-27 23:16:34,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 654 transitions, 11301 flow [2024-06-27 23:16:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:16:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:16:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:16:34,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:16:34,563 INFO L175 Difference]: Start difference. First operand has 383 places, 634 transitions, 9565 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:16:34,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 654 transitions, 11301 flow [2024-06-27 23:16:38,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 654 transitions, 11177 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:16:38,345 INFO L231 Difference]: Finished difference. Result has 386 places, 641 transitions, 9763 flow [2024-06-27 23:16:38,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9441, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9763, PETRI_PLACES=386, PETRI_TRANSITIONS=641} [2024-06-27 23:16:38,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 23:16:38,346 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 641 transitions, 9763 flow [2024-06-27 23:16:38,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:38,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:38,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:16:38,346 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:38,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash 231915066, now seen corresponding path program 6 times [2024-06-27 23:16:38,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387456996] [2024-06-27 23:16:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:38,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:40,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387456996] [2024-06-27 23:16:40,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387456996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:40,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:40,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:16:40,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096122058] [2024-06-27 23:16:40,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:40,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:16:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:16:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:16:40,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:16:40,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 641 transitions, 9763 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:40,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:40,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:16:40,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:43,899 INFO L124 PetriNetUnfolderBase]: 6265/10580 cut-off events. [2024-06-27 23:16:43,899 INFO L125 PetriNetUnfolderBase]: For 1067596/1067598 co-relation queries the response was YES. [2024-06-27 23:16:44,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89669 conditions, 10580 events. 6265/10580 cut-off events. For 1067596/1067598 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 78747 event pairs, 2602 based on Foata normal form. 1/10579 useless extension candidates. Maximal degree in co-relation 89486. Up to 9820 conditions per place. [2024-06-27 23:16:44,062 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 598 selfloop transitions, 58 changer transitions 0/661 dead transitions. [2024-06-27 23:16:44,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 661 transitions, 11335 flow [2024-06-27 23:16:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:16:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:16:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 23:16:44,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:16:44,063 INFO L175 Difference]: Start difference. First operand has 386 places, 641 transitions, 9763 flow. Second operand 9 states and 153 transitions. [2024-06-27 23:16:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 661 transitions, 11335 flow [2024-06-27 23:16:46,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 661 transitions, 11166 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:46,968 INFO L231 Difference]: Finished difference. Result has 391 places, 651 transitions, 9984 flow [2024-06-27 23:16:46,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9644, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9984, PETRI_PLACES=391, PETRI_TRANSITIONS=651} [2024-06-27 23:16:46,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 23:16:46,969 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 651 transitions, 9984 flow [2024-06-27 23:16:46,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:46,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:46,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:46,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:16:46,969 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:46,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:46,970 INFO L85 PathProgramCache]: Analyzing trace with hash 231915314, now seen corresponding path program 2 times [2024-06-27 23:16:46,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:46,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036446951] [2024-06-27 23:16:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:46,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:49,448 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 23:16:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:49,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036446951] [2024-06-27 23:16:49,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036446951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:49,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:16:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352433744] [2024-06-27 23:16:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:16:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:16:49,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:16:49,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:16:49,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 651 transitions, 9984 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:49,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:49,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:16:49,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:52,274 INFO L124 PetriNetUnfolderBase]: 6275/10592 cut-off events. [2024-06-27 23:16:52,274 INFO L125 PetriNetUnfolderBase]: For 1095646/1095648 co-relation queries the response was YES. [2024-06-27 23:16:52,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90617 conditions, 10592 events. 6275/10592 cut-off events. For 1095646/1095648 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 78832 event pairs, 2587 based on Foata normal form. 4/10594 useless extension candidates. Maximal degree in co-relation 90431. Up to 9849 conditions per place. [2024-06-27 23:16:52,450 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 43 changer transitions 0/674 dead transitions. [2024-06-27 23:16:52,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 674 transitions, 12088 flow [2024-06-27 23:16:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:16:52,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:16:52,452 INFO L175 Difference]: Start difference. First operand has 391 places, 651 transitions, 9984 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:16:52,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 674 transitions, 12088 flow [2024-06-27 23:16:56,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 674 transitions, 11955 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:56,110 INFO L231 Difference]: Finished difference. Result has 395 places, 659 transitions, 10259 flow [2024-06-27 23:16:56,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9851, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10259, PETRI_PLACES=395, PETRI_TRANSITIONS=659} [2024-06-27 23:16:56,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 23:16:56,111 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 659 transitions, 10259 flow [2024-06-27 23:16:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:56,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:56,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:56,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:16:56,111 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:56,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash 232211984, now seen corresponding path program 3 times [2024-06-27 23:16:56,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:56,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660372006] [2024-06-27 23:16:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:56,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:58,209 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 23:16:58,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:58,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660372006] [2024-06-27 23:16:58,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660372006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:58,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:58,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:16:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987307442] [2024-06-27 23:16:58,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:58,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:16:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:16:58,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:16:58,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:16:58,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 659 transitions, 10259 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:58,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:58,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:16:58,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:01,531 INFO L124 PetriNetUnfolderBase]: 6269/10590 cut-off events. [2024-06-27 23:17:01,532 INFO L125 PetriNetUnfolderBase]: For 1100988/1100990 co-relation queries the response was YES. [2024-06-27 23:17:01,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90689 conditions, 10590 events. 6269/10590 cut-off events. For 1100988/1100990 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 78832 event pairs, 2589 based on Foata normal form. 4/10592 useless extension candidates. Maximal degree in co-relation 90500. Up to 9844 conditions per place. [2024-06-27 23:17:01,726 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 622 selfloop transitions, 45 changer transitions 0/672 dead transitions. [2024-06-27 23:17:01,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 672 transitions, 11857 flow [2024-06-27 23:17:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:17:01,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 23:17:01,728 INFO L175 Difference]: Start difference. First operand has 395 places, 659 transitions, 10259 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:17:01,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 672 transitions, 11857 flow [2024-06-27 23:17:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 672 transitions, 11640 flow, removed 98 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:04,677 INFO L231 Difference]: Finished difference. Result has 400 places, 659 transitions, 10138 flow [2024-06-27 23:17:04,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10042, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10138, PETRI_PLACES=400, PETRI_TRANSITIONS=659} [2024-06-27 23:17:04,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 23:17:04,678 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 659 transitions, 10138 flow [2024-06-27 23:17:04,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:04,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:04,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:04,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:17:04,679 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:04,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash 232222896, now seen corresponding path program 1 times [2024-06-27 23:17:04,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:04,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638845411] [2024-06-27 23:17:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:04,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:07,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:07,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638845411] [2024-06-27 23:17:07,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638845411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:07,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:07,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 23:17:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283112840] [2024-06-27 23:17:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:07,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 23:17:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 23:17:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 23:17:07,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:17:07,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 659 transitions, 10138 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:07,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:07,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:17:07,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:10,412 INFO L124 PetriNetUnfolderBase]: 6013/10251 cut-off events. [2024-06-27 23:17:10,413 INFO L125 PetriNetUnfolderBase]: For 1113379/1113404 co-relation queries the response was YES. [2024-06-27 23:17:10,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88358 conditions, 10251 events. 6013/10251 cut-off events. For 1113379/1113404 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 77163 event pairs, 2507 based on Foata normal form. 9/10199 useless extension candidates. Maximal degree in co-relation 88167. Up to 9380 conditions per place. [2024-06-27 23:17:10,859 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 598 selfloop transitions, 18 changer transitions 0/673 dead transitions. [2024-06-27 23:17:10,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 673 transitions, 11504 flow [2024-06-27 23:17:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 23:17:10,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:17:10,860 INFO L175 Difference]: Start difference. First operand has 400 places, 659 transitions, 10138 flow. Second operand 9 states and 153 transitions. [2024-06-27 23:17:10,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 673 transitions, 11504 flow [2024-06-27 23:17:13,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 673 transitions, 11408 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:13,562 INFO L231 Difference]: Finished difference. Result has 402 places, 661 transitions, 10175 flow [2024-06-27 23:17:13,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10042, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10175, PETRI_PLACES=402, PETRI_TRANSITIONS=661} [2024-06-27 23:17:13,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 23:17:13,563 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 661 transitions, 10175 flow [2024-06-27 23:17:13,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:13,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:13,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:13,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:17:13,564 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:13,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1497523742, now seen corresponding path program 1 times [2024-06-27 23:17:13,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:13,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130689601] [2024-06-27 23:17:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:14,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130689601] [2024-06-27 23:17:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130689601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:14,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:14,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815351785] [2024-06-27 23:17:14,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:14,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:14,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:14,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:14,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:17:14,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 661 transitions, 10175 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:14,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:14,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:17:14,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:17,512 INFO L124 PetriNetUnfolderBase]: 6269/10592 cut-off events. [2024-06-27 23:17:17,512 INFO L125 PetriNetUnfolderBase]: For 1119688/1119688 co-relation queries the response was YES. [2024-06-27 23:17:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90613 conditions, 10592 events. 6269/10592 cut-off events. For 1119688/1119688 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 78774 event pairs, 1770 based on Foata normal form. 1/10589 useless extension candidates. Maximal degree in co-relation 90422. Up to 9815 conditions per place. [2024-06-27 23:17:17,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 627 selfloop transitions, 50 changer transitions 0/682 dead transitions. [2024-06-27 23:17:17,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 682 transitions, 11693 flow [2024-06-27 23:17:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:17:17,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:17:17,690 INFO L175 Difference]: Start difference. First operand has 402 places, 661 transitions, 10175 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:17:17,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 682 transitions, 11693 flow [2024-06-27 23:17:21,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 682 transitions, 11576 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:21,369 INFO L231 Difference]: Finished difference. Result has 404 places, 664 transitions, 10273 flow [2024-06-27 23:17:21,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10058, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10273, PETRI_PLACES=404, PETRI_TRANSITIONS=664} [2024-06-27 23:17:21,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-27 23:17:21,370 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 664 transitions, 10273 flow [2024-06-27 23:17:21,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:21,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:21,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:21,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:17:21,371 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:21,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:21,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2115216986, now seen corresponding path program 2 times [2024-06-27 23:17:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:21,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730379980] [2024-06-27 23:17:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:22,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:22,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730379980] [2024-06-27 23:17:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730379980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:22,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:22,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880878231] [2024-06-27 23:17:22,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:22,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:22,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:22,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:22,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:17:22,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 664 transitions, 10273 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:22,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:22,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:17:22,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:25,452 INFO L124 PetriNetUnfolderBase]: 6284/10617 cut-off events. [2024-06-27 23:17:25,452 INFO L125 PetriNetUnfolderBase]: For 1142284/1142284 co-relation queries the response was YES. [2024-06-27 23:17:25,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91412 conditions, 10617 events. 6284/10617 cut-off events. For 1142284/1142284 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 78932 event pairs, 1805 based on Foata normal form. 1/10614 useless extension candidates. Maximal degree in co-relation 91220. Up to 9823 conditions per place. [2024-06-27 23:17:25,659 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 628 selfloop transitions, 59 changer transitions 0/692 dead transitions. [2024-06-27 23:17:25,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 692 transitions, 11885 flow [2024-06-27 23:17:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 23:17:25,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 23:17:25,676 INFO L175 Difference]: Start difference. First operand has 404 places, 664 transitions, 10273 flow. Second operand 9 states and 164 transitions. [2024-06-27 23:17:25,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 692 transitions, 11885 flow [2024-06-27 23:17:30,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 692 transitions, 11698 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:30,045 INFO L231 Difference]: Finished difference. Result has 407 places, 673 transitions, 10417 flow [2024-06-27 23:17:30,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10086, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10417, PETRI_PLACES=407, PETRI_TRANSITIONS=673} [2024-06-27 23:17:30,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 23:17:30,047 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 673 transitions, 10417 flow [2024-06-27 23:17:30,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:30,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:30,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:30,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:17:30,048 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:30,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2071125380, now seen corresponding path program 3 times [2024-06-27 23:17:30,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:30,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97598198] [2024-06-27 23:17:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:30,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:31,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:31,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97598198] [2024-06-27 23:17:31,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97598198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:31,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:31,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650398348] [2024-06-27 23:17:31,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:31,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:17:31,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 673 transitions, 10417 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:31,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:31,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:17:31,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:33,946 INFO L124 PetriNetUnfolderBase]: 6289/10625 cut-off events. [2024-06-27 23:17:33,947 INFO L125 PetriNetUnfolderBase]: For 1165871/1165873 co-relation queries the response was YES. [2024-06-27 23:17:34,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92140 conditions, 10625 events. 6289/10625 cut-off events. For 1165871/1165873 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 78965 event pairs, 1692 based on Foata normal form. 3/10624 useless extension candidates. Maximal degree in co-relation 91946. Up to 9733 conditions per place. [2024-06-27 23:17:34,146 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 599 selfloop transitions, 91 changer transitions 0/695 dead transitions. [2024-06-27 23:17:34,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 695 transitions, 12001 flow [2024-06-27 23:17:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:17:34,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:17:34,148 INFO L175 Difference]: Start difference. First operand has 407 places, 673 transitions, 10417 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:17:34,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 695 transitions, 12001 flow [2024-06-27 23:17:38,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 695 transitions, 11796 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 23:17:38,957 INFO L231 Difference]: Finished difference. Result has 410 places, 676 transitions, 10520 flow [2024-06-27 23:17:38,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10212, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10520, PETRI_PLACES=410, PETRI_TRANSITIONS=676} [2024-06-27 23:17:38,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 23:17:38,958 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 676 transitions, 10520 flow [2024-06-27 23:17:38,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:38,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:38,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:38,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:17:38,958 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:38,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1612993658, now seen corresponding path program 1 times [2024-06-27 23:17:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:38,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355766132] [2024-06-27 23:17:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:38,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:39,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:39,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355766132] [2024-06-27 23:17:39,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355766132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:39,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:39,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:39,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575846999] [2024-06-27 23:17:39,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:39,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:39,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:39,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:39,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:39,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:17:39,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 676 transitions, 10520 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:39,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:39,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:17:39,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:42,909 INFO L124 PetriNetUnfolderBase]: 6294/10639 cut-off events. [2024-06-27 23:17:42,909 INFO L125 PetriNetUnfolderBase]: For 1187147/1187151 co-relation queries the response was YES. [2024-06-27 23:17:43,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92894 conditions, 10639 events. 6294/10639 cut-off events. For 1187147/1187151 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 79168 event pairs, 2020 based on Foata normal form. 3/10639 useless extension candidates. Maximal degree in co-relation 92699. Up to 9806 conditions per place. [2024-06-27 23:17:43,097 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 59 changer transitions 0/699 dead transitions. [2024-06-27 23:17:43,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 699 transitions, 12082 flow [2024-06-27 23:17:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:17:43,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:17:43,098 INFO L175 Difference]: Start difference. First operand has 410 places, 676 transitions, 10520 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:17:43,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 699 transitions, 12082 flow [2024-06-27 23:17:47,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 699 transitions, 11800 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 23:17:47,310 INFO L231 Difference]: Finished difference. Result has 411 places, 679 transitions, 10446 flow [2024-06-27 23:17:47,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10238, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10446, PETRI_PLACES=411, PETRI_TRANSITIONS=679} [2024-06-27 23:17:47,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-27 23:17:47,310 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 679 transitions, 10446 flow [2024-06-27 23:17:47,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:47,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:47,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:47,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:17:47,311 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:47,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2070797090, now seen corresponding path program 4 times [2024-06-27 23:17:47,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:47,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337324883] [2024-06-27 23:17:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:47,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:48,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:48,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337324883] [2024-06-27 23:17:48,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337324883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:48,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:48,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:48,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766106654] [2024-06-27 23:17:48,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:48,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:17:48,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 679 transitions, 10446 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:48,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:48,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:17:48,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:51,147 INFO L124 PetriNetUnfolderBase]: 6299/10640 cut-off events. [2024-06-27 23:17:51,148 INFO L125 PetriNetUnfolderBase]: For 1207676/1207678 co-relation queries the response was YES. [2024-06-27 23:17:51,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93622 conditions, 10640 events. 6299/10640 cut-off events. For 1207676/1207678 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 79010 event pairs, 1655 based on Foata normal form. 3/10639 useless extension candidates. Maximal degree in co-relation 93426. Up to 9722 conditions per place. [2024-06-27 23:17:51,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 591 selfloop transitions, 103 changer transitions 0/699 dead transitions. [2024-06-27 23:17:51,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 699 transitions, 12040 flow [2024-06-27 23:17:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:17:51,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:17:51,341 INFO L175 Difference]: Start difference. First operand has 411 places, 679 transitions, 10446 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:17:51,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 699 transitions, 12040 flow [2024-06-27 23:17:56,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 699 transitions, 11886 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:56,113 INFO L231 Difference]: Finished difference. Result has 414 places, 682 transitions, 10632 flow [2024-06-27 23:17:56,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10292, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10632, PETRI_PLACES=414, PETRI_TRANSITIONS=682} [2024-06-27 23:17:56,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-27 23:17:56,114 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 682 transitions, 10632 flow [2024-06-27 23:17:56,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:56,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:56,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:56,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:17:56,115 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:56,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1613143605, now seen corresponding path program 1 times [2024-06-27 23:17:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:56,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142061191] [2024-06-27 23:17:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:57,504 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 23:17:57,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142061191] [2024-06-27 23:17:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142061191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:57,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:57,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:57,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18926898] [2024-06-27 23:17:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:57,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:57,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:57,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:57,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:57,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:17:57,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 682 transitions, 10632 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:57,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:57,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:17:57,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:00,443 INFO L124 PetriNetUnfolderBase]: 6304/10650 cut-off events. [2024-06-27 23:18:00,443 INFO L125 PetriNetUnfolderBase]: For 1236308/1236312 co-relation queries the response was YES. [2024-06-27 23:18:00,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94388 conditions, 10650 events. 6304/10650 cut-off events. For 1236308/1236312 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 79237 event pairs, 2058 based on Foata normal form. 5/10652 useless extension candidates. Maximal degree in co-relation 94191. Up to 9873 conditions per place. [2024-06-27 23:18:00,628 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 648 selfloop transitions, 48 changer transitions 0/701 dead transitions. [2024-06-27 23:18:00,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 701 transitions, 12182 flow [2024-06-27 23:18:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 23:18:00,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 23:18:00,630 INFO L175 Difference]: Start difference. First operand has 414 places, 682 transitions, 10632 flow. Second operand 8 states and 145 transitions. [2024-06-27 23:18:00,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 701 transitions, 12182 flow [2024-06-27 23:18:04,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 701 transitions, 11868 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:04,802 INFO L231 Difference]: Finished difference. Result has 416 places, 685 transitions, 10514 flow [2024-06-27 23:18:04,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10318, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10514, PETRI_PLACES=416, PETRI_TRANSITIONS=685} [2024-06-27 23:18:04,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-27 23:18:04,803 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 685 transitions, 10514 flow [2024-06-27 23:18:04,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:04,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:04,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:18:04,804 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:04,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash -801213668, now seen corresponding path program 2 times [2024-06-27 23:18:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:04,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467787701] [2024-06-27 23:18:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467787701] [2024-06-27 23:18:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467787701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088234744] [2024-06-27 23:18:05,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:05,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:05,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:05,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:05,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:06,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:18:06,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 685 transitions, 10514 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:06,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:06,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:18:06,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:08,875 INFO L124 PetriNetUnfolderBase]: 6309/10662 cut-off events. [2024-06-27 23:18:08,875 INFO L125 PetriNetUnfolderBase]: For 1251362/1251366 co-relation queries the response was YES. [2024-06-27 23:18:09,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94663 conditions, 10662 events. 6309/10662 cut-off events. For 1251362/1251366 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 79304 event pairs, 2019 based on Foata normal form. 3/10662 useless extension candidates. Maximal degree in co-relation 94465. Up to 9811 conditions per place. [2024-06-27 23:18:09,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 633 selfloop transitions, 68 changer transitions 0/706 dead transitions. [2024-06-27 23:18:09,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 706 transitions, 12094 flow [2024-06-27 23:18:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:18:09,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:18:09,072 INFO L175 Difference]: Start difference. First operand has 416 places, 685 transitions, 10514 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:18:09,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 706 transitions, 12094 flow [2024-06-27 23:18:13,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 706 transitions, 11935 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 23:18:13,761 INFO L231 Difference]: Finished difference. Result has 420 places, 688 transitions, 10591 flow [2024-06-27 23:18:13,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10355, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10591, PETRI_PLACES=420, PETRI_TRANSITIONS=688} [2024-06-27 23:18:13,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-27 23:18:13,762 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 688 transitions, 10591 flow [2024-06-27 23:18:13,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:13,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:13,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:13,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:18:13,763 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:13,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1863876337, now seen corresponding path program 2 times [2024-06-27 23:18:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:13,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792316614] [2024-06-27 23:18:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:15,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:15,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792316614] [2024-06-27 23:18:15,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792316614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:15,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:15,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:15,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90193924] [2024-06-27 23:18:15,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:15,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:15,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:15,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:18:15,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 688 transitions, 10591 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:15,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:15,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:18:15,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:18,373 INFO L124 PetriNetUnfolderBase]: 6322/10680 cut-off events. [2024-06-27 23:18:18,373 INFO L125 PetriNetUnfolderBase]: For 1282379/1282383 co-relation queries the response was YES. [2024-06-27 23:18:18,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95828 conditions, 10680 events. 6322/10680 cut-off events. For 1282379/1282383 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 79497 event pairs, 2019 based on Foata normal form. 5/10682 useless extension candidates. Maximal degree in co-relation 95629. Up to 9859 conditions per place. [2024-06-27 23:18:18,556 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 72 changer transitions 0/712 dead transitions. [2024-06-27 23:18:18,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 712 transitions, 12509 flow [2024-06-27 23:18:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 23:18:18,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 23:18:18,558 INFO L175 Difference]: Start difference. First operand has 420 places, 688 transitions, 10591 flow. Second operand 9 states and 155 transitions. [2024-06-27 23:18:18,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 712 transitions, 12509 flow [2024-06-27 23:18:23,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 712 transitions, 12297 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:18:23,844 INFO L231 Difference]: Finished difference. Result has 423 places, 698 transitions, 10787 flow [2024-06-27 23:18:23,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10379, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10787, PETRI_PLACES=423, PETRI_TRANSITIONS=698} [2024-06-27 23:18:23,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-27 23:18:23,844 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 698 transitions, 10787 flow [2024-06-27 23:18:23,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:23,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:23,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:23,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:18:23,845 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:23,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1819796642, now seen corresponding path program 5 times [2024-06-27 23:18:23,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:23,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075742862] [2024-06-27 23:18:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:25,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:25,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075742862] [2024-06-27 23:18:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075742862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:25,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:25,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043751395] [2024-06-27 23:18:25,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:25,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:25,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:18:25,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 698 transitions, 10787 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:25,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:25,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:18:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:28,320 INFO L124 PetriNetUnfolderBase]: 6343/10705 cut-off events. [2024-06-27 23:18:28,320 INFO L125 PetriNetUnfolderBase]: For 1320256/1320258 co-relation queries the response was YES. [2024-06-27 23:18:28,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97002 conditions, 10705 events. 6343/10705 cut-off events. For 1320256/1320258 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 79432 event pairs, 1605 based on Foata normal form. 3/10704 useless extension candidates. Maximal degree in co-relation 96802. Up to 9725 conditions per place. [2024-06-27 23:18:28,801 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 584 selfloop transitions, 133 changer transitions 0/722 dead transitions. [2024-06-27 23:18:28,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 722 transitions, 13133 flow [2024-06-27 23:18:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:18:28,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:18:28,802 INFO L175 Difference]: Start difference. First operand has 423 places, 698 transitions, 10787 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:18:28,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 722 transitions, 13133 flow [2024-06-27 23:18:34,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 722 transitions, 12968 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:34,213 INFO L231 Difference]: Finished difference. Result has 428 places, 707 transitions, 11297 flow [2024-06-27 23:18:34,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10622, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11297, PETRI_PLACES=428, PETRI_TRANSITIONS=707} [2024-06-27 23:18:34,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 23:18:34,214 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 707 transitions, 11297 flow [2024-06-27 23:18:34,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:34,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:34,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:34,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:18:34,215 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:34,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1284931486, now seen corresponding path program 6 times [2024-06-27 23:18:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146772262] [2024-06-27 23:18:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:35,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:35,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146772262] [2024-06-27 23:18:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146772262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:35,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716921616] [2024-06-27 23:18:35,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:35,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:35,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:35,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:35,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:18:35,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 707 transitions, 11297 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:35,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:35,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:18:35,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:39,131 INFO L124 PetriNetUnfolderBase]: 6340/10695 cut-off events. [2024-06-27 23:18:39,132 INFO L125 PetriNetUnfolderBase]: For 1341200/1341200 co-relation queries the response was YES. [2024-06-27 23:18:39,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97655 conditions, 10695 events. 6340/10695 cut-off events. For 1341200/1341200 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 79507 event pairs, 1698 based on Foata normal form. 1/10692 useless extension candidates. Maximal degree in co-relation 97453. Up to 9919 conditions per place. [2024-06-27 23:18:39,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 661 selfloop transitions, 54 changer transitions 0/720 dead transitions. [2024-06-27 23:18:39,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 720 transitions, 12775 flow [2024-06-27 23:18:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 23:18:39,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 23:18:39,296 INFO L175 Difference]: Start difference. First operand has 428 places, 707 transitions, 11297 flow. Second operand 9 states and 154 transitions. [2024-06-27 23:18:39,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 720 transitions, 12775 flow [2024-06-27 23:18:43,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 720 transitions, 12437 flow, removed 126 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:44,000 INFO L231 Difference]: Finished difference. Result has 433 places, 707 transitions, 11074 flow [2024-06-27 23:18:44,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10959, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11074, PETRI_PLACES=433, PETRI_TRANSITIONS=707} [2024-06-27 23:18:44,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 23:18:44,011 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 707 transitions, 11074 flow [2024-06-27 23:18:44,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:44,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:44,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:44,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:18:44,012 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:44,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 796517303, now seen corresponding path program 3 times [2024-06-27 23:18:44,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:44,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043242948] [2024-06-27 23:18:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:44,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:45,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:45,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043242948] [2024-06-27 23:18:45,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043242948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:45,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601854313] [2024-06-27 23:18:45,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:45,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:45,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:45,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:18:45,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 707 transitions, 11074 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:45,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:45,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:18:45,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:49,233 INFO L124 PetriNetUnfolderBase]: 6345/10714 cut-off events. [2024-06-27 23:18:49,234 INFO L125 PetriNetUnfolderBase]: For 1357876/1357880 co-relation queries the response was YES. [2024-06-27 23:18:49,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97810 conditions, 10714 events. 6345/10714 cut-off events. For 1357876/1357880 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 79681 event pairs, 2019 based on Foata normal form. 5/10716 useless extension candidates. Maximal degree in co-relation 97606. Up to 9914 conditions per place. [2024-06-27 23:18:49,560 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 654 selfloop transitions, 64 changer transitions 0/723 dead transitions. [2024-06-27 23:18:49,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 723 transitions, 12643 flow [2024-06-27 23:18:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 23:18:49,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:18:49,561 INFO L175 Difference]: Start difference. First operand has 433 places, 707 transitions, 11074 flow. Second operand 9 states and 153 transitions. [2024-06-27 23:18:49,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 723 transitions, 12643 flow [2024-06-27 23:18:54,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 723 transitions, 12442 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 23:18:54,500 INFO L231 Difference]: Finished difference. Result has 433 places, 710 transitions, 11099 flow [2024-06-27 23:18:54,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10873, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11099, PETRI_PLACES=433, PETRI_TRANSITIONS=710} [2024-06-27 23:18:54,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 23:18:54,500 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 710 transitions, 11099 flow [2024-06-27 23:18:54,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:54,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:54,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:54,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:18:54,501 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:54,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:54,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1819796828, now seen corresponding path program 3 times [2024-06-27 23:18:54,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:54,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435583159] [2024-06-27 23:18:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:54,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:55,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:55,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435583159] [2024-06-27 23:18:55,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435583159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:55,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:55,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:55,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108593303] [2024-06-27 23:18:55,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:55,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:55,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:55,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:55,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:18:55,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 710 transitions, 11099 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:55,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:55,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:18:55,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:59,131 INFO L124 PetriNetUnfolderBase]: 6358/10738 cut-off events. [2024-06-27 23:18:59,132 INFO L125 PetriNetUnfolderBase]: For 1385557/1385561 co-relation queries the response was YES. [2024-06-27 23:18:59,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98302 conditions, 10738 events. 6358/10738 cut-off events. For 1385557/1385561 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 79973 event pairs, 2020 based on Foata normal form. 3/10738 useless extension candidates. Maximal degree in co-relation 98099. Up to 9842 conditions per place. [2024-06-27 23:18:59,304 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 641 selfloop transitions, 85 changer transitions 0/731 dead transitions. [2024-06-27 23:18:59,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 731 transitions, 13041 flow [2024-06-27 23:18:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:18:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:18:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:18:59,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:18:59,305 INFO L175 Difference]: Start difference. First operand has 433 places, 710 transitions, 11099 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:18:59,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 731 transitions, 13041 flow [2024-06-27 23:19:04,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 731 transitions, 12836 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 23:19:04,929 INFO L231 Difference]: Finished difference. Result has 434 places, 716 transitions, 11269 flow [2024-06-27 23:19:04,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10894, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11269, PETRI_PLACES=434, PETRI_TRANSITIONS=716} [2024-06-27 23:19:04,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-27 23:19:04,930 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 716 transitions, 11269 flow [2024-06-27 23:19:04,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:04,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:04,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:04,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 23:19:04,933 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:04,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1609944352, now seen corresponding path program 1 times [2024-06-27 23:19:04,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:04,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818791582] [2024-06-27 23:19:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818791582] [2024-06-27 23:19:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818791582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:06,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:06,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:19:06,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392866405] [2024-06-27 23:19:06,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:06,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:19:06,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:06,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:19:06,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:19:06,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:19:06,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 716 transitions, 11269 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:06,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:06,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:19:06,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:09,668 INFO L124 PetriNetUnfolderBase]: 6065/10297 cut-off events. [2024-06-27 23:19:09,668 INFO L125 PetriNetUnfolderBase]: For 1428057/1428127 co-relation queries the response was YES. [2024-06-27 23:19:09,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96855 conditions, 10297 events. 6065/10297 cut-off events. For 1428057/1428127 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 77535 event pairs, 1631 based on Foata normal form. 32/10163 useless extension candidates. Maximal degree in co-relation 96651. Up to 9232 conditions per place. [2024-06-27 23:19:09,829 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 610 selfloop transitions, 45 changer transitions 0/740 dead transitions. [2024-06-27 23:19:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 740 transitions, 12742 flow [2024-06-27 23:19:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:19:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:19:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:19:09,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:19:09,832 INFO L175 Difference]: Start difference. First operand has 434 places, 716 transitions, 11269 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:19:09,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 740 transitions, 12742 flow