./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:48:41,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:48:41,221 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:48:41,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:48:41,227 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:48:41,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:48:41,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:48:41,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:48:41,252 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:48:41,255 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:48:41,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:48:41,256 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:48:41,256 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:48:41,257 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:48:41,258 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:48:41,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:48:41,258 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:48:41,258 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:48:41,258 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:48:41,259 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:48:41,259 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:48:41,259 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:48:41,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:48:41,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:48:41,260 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:48:41,260 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:48:41,260 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:48:41,261 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:48:41,261 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:48:41,261 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:48:41,262 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:48:41,262 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:48:41,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:48:41,263 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:48:41,263 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:48:41,263 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:48:41,263 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:48:41,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:48:41,263 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:48:41,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:48:41,264 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:48:41,264 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:48:41,264 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:48:41,264 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:48:41,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:48:41,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:48:41,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:48:41,531 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:48:41,532 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:48:41,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 18:48:41,619 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:48:41,623 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:48:41,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:48:42,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:48:42,857 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:48:42,857 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:48:42,874 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e66f84b/c99c6ac149ed40a3bd291f84e3ce592a/FLAG7ccdf1bc9 [2024-06-21 18:48:42,884 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e66f84b/c99c6ac149ed40a3bd291f84e3ce592a [2024-06-21 18:48:42,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:48:42,885 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:48:42,886 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:48:42,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:48:42,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:48:42,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:41" (1/2) ... [2024-06-21 18:48:42,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528f41e2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:48:42, skipping insertion in model container [2024-06-21 18:48:42,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:41" (1/2) ... [2024-06-21 18:48:42,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b3adcfe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:48:42, skipping insertion in model container [2024-06-21 18:48:42,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:48:42" (2/2) ... [2024-06-21 18:48:42,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528f41e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:42, skipping insertion in model container [2024-06-21 18:48:42,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:48:42" (2/2) ... [2024-06-21 18:48:42,893 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:48:42,915 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:48:42,916 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 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_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:48:42,917 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 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_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:48:42,917 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 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_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:48:42,917 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p3_EBX) + (long long )a >= 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_p3_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )__unbuffered_p3_EBX >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:48:42,917 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:48:42,918 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-21 18:48:42,947 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:48:43,213 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:48:43,221 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:48:43,403 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:48:43,437 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:48:43,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43 WrapperNode [2024-06-21 18:48:43,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:48:43,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:48:43,440 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:48:43,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:48:43,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,507 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-21 18:48:43,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:48:43,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:48:43,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:48:43,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:48:43,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,522 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,540 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]. [2024-06-21 18:48:43,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,557 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,561 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:48:43,562 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:48:43,562 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:48:43,562 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:48:43,563 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (1/1) ... [2024-06-21 18:48:43,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:48:43,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:48:43,587 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) [2024-06-21 18:48:43,605 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 [2024-06-21 18:48:43,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:48:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:48:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:48:43,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:48:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:48:43,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:48:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:48:43,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:48:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 18:48:43,619 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 18:48:43,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:48:43,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:48:43,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:48:43,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:48:43,620 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:48:43,761 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:48:43,763 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:48:44,350 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:48:44,350 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:48:44,550 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:48:44,550 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:48:44,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:48:44 BoogieIcfgContainer [2024-06-21 18:48:44,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:48:44,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:48:44,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:48:44,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:48:44,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:41" (1/4) ... [2024-06-21 18:48:44,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3817286e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:48:44, skipping insertion in model container [2024-06-21 18:48:44,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:48:42" (2/4) ... [2024-06-21 18:48:44,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3817286e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:48:44, skipping insertion in model container [2024-06-21 18:48:44,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:43" (3/4) ... [2024-06-21 18:48:44,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3817286e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:48:44, skipping insertion in model container [2024-06-21 18:48:44,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:48:44" (4/4) ... [2024-06-21 18:48:44,575 INFO L112 eAbstractionObserver]: Analyzing ICFG mix029_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:48:44,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:48:44,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 18:48:44,589 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:48:44,645 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:48:44,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 18:48:44,712 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 18:48:44,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:48:44,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:48:44,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 18:48:44,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 18:48:44,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:48:44,739 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;@2c5eed15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:48:44,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 18:48:44,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:48:44,745 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:48:44,745 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:48:44,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:44,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:48:44,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:48:44,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:44,750 INFO L85 PathProgramCache]: Analyzing trace with hash 389440905, now seen corresponding path program 1 times [2024-06-21 18:48:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:44,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449211881] [2024-06-21 18:48:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:45,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449211881] [2024-06-21 18:48:45,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449211881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:45,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:45,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:48:45,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445447936] [2024-06-21 18:48:45,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:48:45,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:48:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:48:46,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 18:48:46,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 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) [2024-06-21 18:48:46,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:46,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 18:48:46,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:47,434 INFO L124 PetriNetUnfolderBase]: 7775/11127 cut-off events. [2024-06-21 18:48:47,434 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-06-21 18:48:47,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22099 conditions, 11127 events. 7775/11127 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 63774 event pairs, 5733 based on Foata normal form. 1/10783 useless extension candidates. Maximal degree in co-relation 22086. Up to 10609 conditions per place. [2024-06-21 18:48:47,495 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 18:48:47,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-21 18:48:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:48:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:48:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-21 18:48:47,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:48:47,507 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-21 18:48:47,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-21 18:48:47,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:47,515 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 18:48:47,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 18:48:47,519 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 18:48:47,519 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 18:48:47,520 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) [2024-06-21 18:48:47,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:47,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:47,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:48:47,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:48:47,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash 590575656, now seen corresponding path program 1 times [2024-06-21 18:48:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:47,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204469062] [2024-06-21 18:48:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204469062] [2024-06-21 18:48:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204469062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:48,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:48:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952952989] [2024-06-21 18:48:48,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:48:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:48:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:48:48,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 18:48:48,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 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) [2024-06-21 18:48:48,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:48,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 18:48:48,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:49,632 INFO L124 PetriNetUnfolderBase]: 9097/12637 cut-off events. [2024-06-21 18:48:49,633 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2024-06-21 18:48:49,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28720 conditions, 12637 events. 9097/12637 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 69920 event pairs, 5837 based on Foata normal form. 4/12637 useless extension candidates. Maximal degree in co-relation 28708. Up to 12338 conditions per place. [2024-06-21 18:48:49,707 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 18:48:49,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-21 18:48:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:48:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:48:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 18:48:49,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-21 18:48:49,711 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 122 transitions. [2024-06-21 18:48:49,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-21 18:48:49,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:48:49,715 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 18:48:49,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 18:48:49,716 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 18:48:49,717 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 18:48:49,719 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) [2024-06-21 18:48:49,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:49,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:49,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:48:49,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:48:49,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1654027547, now seen corresponding path program 1 times [2024-06-21 18:48:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:49,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376331847] [2024-06-21 18:48:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:49,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:50,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376331847] [2024-06-21 18:48:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376331847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:50,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:50,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505452058] [2024-06-21 18:48:50,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:50,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 18:48:50,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 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) [2024-06-21 18:48:50,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:50,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 18:48:50,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:52,479 INFO L124 PetriNetUnfolderBase]: 11555/15928 cut-off events. [2024-06-21 18:48:52,480 INFO L125 PetriNetUnfolderBase]: For 8202/8202 co-relation queries the response was YES. [2024-06-21 18:48:52,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39937 conditions, 15928 events. 11555/15928 cut-off events. For 8202/8202 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86326 event pairs, 5920 based on Foata normal form. 8/15932 useless extension candidates. Maximal degree in co-relation 39923. Up to 15541 conditions per place. [2024-06-21 18:48:52,567 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 71 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 18:48:52,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 486 flow [2024-06-21 18:48:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-21 18:48:52,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 18:48:52,570 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 169 transitions. [2024-06-21 18:48:52,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 486 flow [2024-06-21 18:48:52,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:52,573 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 18:48:52,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 18:48:52,574 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 18:48:52,574 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 18:48:52,574 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) [2024-06-21 18:48:52,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:52,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:52,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:48:52,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:48:52,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:52,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1482349763, now seen corresponding path program 1 times [2024-06-21 18:48:52,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:52,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994819237] [2024-06-21 18:48:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:52,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:53,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994819237] [2024-06-21 18:48:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994819237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:53,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:53,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:48:53,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315857298] [2024-06-21 18:48:53,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:53,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:48:53,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:48:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:48:53,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:48:53,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:53,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:53,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:48:53,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:55,196 INFO L124 PetriNetUnfolderBase]: 9854/13976 cut-off events. [2024-06-21 18:48:55,196 INFO L125 PetriNetUnfolderBase]: For 13385/13385 co-relation queries the response was YES. [2024-06-21 18:48:55,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38252 conditions, 13976 events. 9854/13976 cut-off events. For 13385/13385 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78931 event pairs, 5511 based on Foata normal form. 3/13773 useless extension candidates. Maximal degree in co-relation 38235. Up to 13366 conditions per place. [2024-06-21 18:48:55,271 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 59 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-21 18:48:55,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 458 flow [2024-06-21 18:48:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:48:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:48:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 18:48:55,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-21 18:48:55,274 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 123 transitions. [2024-06-21 18:48:55,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 458 flow [2024-06-21 18:48:55,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 418 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:55,281 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 284 flow [2024-06-21 18:48:55,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-21 18:48:55,283 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-21 18:48:55,283 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 284 flow [2024-06-21 18:48:55,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:55,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:55,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:55,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:48:55,284 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:48:55,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1315032729, now seen corresponding path program 1 times [2024-06-21 18:48:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:55,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635782661] [2024-06-21 18:48:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:56,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:56,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635782661] [2024-06-21 18:48:56,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635782661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:56,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:56,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568137456] [2024-06-21 18:48:56,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:56,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:56,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:48:56,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:56,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:56,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:48:56,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:58,246 INFO L124 PetriNetUnfolderBase]: 9836/13952 cut-off events. [2024-06-21 18:48:58,246 INFO L125 PetriNetUnfolderBase]: For 20719/20719 co-relation queries the response was YES. [2024-06-21 18:48:58,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41489 conditions, 13952 events. 9836/13952 cut-off events. For 20719/20719 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78672 event pairs, 5261 based on Foata normal form. 6/13752 useless extension candidates. Maximal degree in co-relation 41468. Up to 13312 conditions per place. [2024-06-21 18:48:58,308 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 67 selfloop transitions, 16 changer transitions 0/90 dead transitions. [2024-06-21 18:48:58,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 540 flow [2024-06-21 18:48:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 18:48:58,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 18:48:58,310 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 284 flow. Second operand 6 states and 147 transitions. [2024-06-21 18:48:58,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 540 flow [2024-06-21 18:48:58,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 517 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:58,315 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 342 flow [2024-06-21 18:48:58,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-21 18:48:58,315 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-21 18:48:58,315 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 342 flow [2024-06-21 18:48:58,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:58,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:58,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:58,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:48:58,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:48:58,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1373301396, now seen corresponding path program 1 times [2024-06-21 18:48:58,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:58,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197451602] [2024-06-21 18:48:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:58,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:59,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:59,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197451602] [2024-06-21 18:48:59,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197451602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:59,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:59,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:59,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282739383] [2024-06-21 18:48:59,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:59,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:59,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:59,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:59,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:48:59,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 342 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) [2024-06-21 18:48:59,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:59,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:48:59,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:01,240 INFO L124 PetriNetUnfolderBase]: 11604/16011 cut-off events. [2024-06-21 18:49:01,241 INFO L125 PetriNetUnfolderBase]: For 35875/35887 co-relation queries the response was YES. [2024-06-21 18:49:01,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51857 conditions, 16011 events. 11604/16011 cut-off events. For 35875/35887 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 86561 event pairs, 6281 based on Foata normal form. 11/16011 useless extension candidates. Maximal degree in co-relation 51833. Up to 15598 conditions per place. [2024-06-21 18:49:01,325 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 77 selfloop transitions, 31 changer transitions 0/114 dead transitions. [2024-06-21 18:49:01,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 819 flow [2024-06-21 18:49:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 18:49:01,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 18:49:01,326 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 342 flow. Second operand 6 states and 152 transitions. [2024-06-21 18:49:01,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 819 flow [2024-06-21 18:49:01,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 114 transitions, 778 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:01,333 INFO L231 Difference]: Finished difference. Result has 72 places, 84 transitions, 527 flow [2024-06-21 18:49:01,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=527, PETRI_PLACES=72, PETRI_TRANSITIONS=84} [2024-06-21 18:49:01,336 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-21 18:49:01,336 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 84 transitions, 527 flow [2024-06-21 18:49:01,337 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) [2024-06-21 18:49:01,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:01,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:01,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:49:01,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:01,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash -816050590, now seen corresponding path program 2 times [2024-06-21 18:49:01,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:01,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690157950] [2024-06-21 18:49:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:01,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690157950] [2024-06-21 18:49:02,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690157950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:02,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:02,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:02,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022737844] [2024-06-21 18:49:02,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:02,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:02,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 84 transitions, 527 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) [2024-06-21 18:49:02,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:02,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:02,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:04,787 INFO L124 PetriNetUnfolderBase]: 11595/15998 cut-off events. [2024-06-21 18:49:04,787 INFO L125 PetriNetUnfolderBase]: For 49400/49406 co-relation queries the response was YES. [2024-06-21 18:49:04,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55751 conditions, 15998 events. 11595/15998 cut-off events. For 49400/49406 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 86405 event pairs, 6275 based on Foata normal form. 7/15995 useless extension candidates. Maximal degree in co-relation 55723. Up to 15589 conditions per place. [2024-06-21 18:49:04,954 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 32 changer transitions 0/110 dead transitions. [2024-06-21 18:49:04,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 837 flow [2024-06-21 18:49:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 18:49:04,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 18:49:04,956 INFO L175 Difference]: Start difference. First operand has 72 places, 84 transitions, 527 flow. Second operand 6 states and 147 transitions. [2024-06-21 18:49:04,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 837 flow [2024-06-21 18:49:04,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 110 transitions, 805 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-21 18:49:04,985 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 572 flow [2024-06-21 18:49:04,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=572, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-21 18:49:04,986 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-21 18:49:04,987 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 572 flow [2024-06-21 18:49:04,987 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) [2024-06-21 18:49:04,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:04,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:04,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:49:04,988 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:04,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1688646954, now seen corresponding path program 3 times [2024-06-21 18:49:04,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:04,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867572967] [2024-06-21 18:49:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:04,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:05,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867572967] [2024-06-21 18:49:05,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867572967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:05,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:05,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:05,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622029646] [2024-06-21 18:49:05,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:05,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:05,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:05,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:05,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 572 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) [2024-06-21 18:49:05,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:05,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:07,691 INFO L124 PetriNetUnfolderBase]: 11658/16087 cut-off events. [2024-06-21 18:49:07,692 INFO L125 PetriNetUnfolderBase]: For 56350/56368 co-relation queries the response was YES. [2024-06-21 18:49:07,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56839 conditions, 16087 events. 11658/16087 cut-off events. For 56350/56368 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 86762 event pairs, 6273 based on Foata normal form. 15/16096 useless extension candidates. Maximal degree in co-relation 56806. Up to 15650 conditions per place. [2024-06-21 18:49:07,799 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 78 selfloop transitions, 49 changer transitions 0/133 dead transitions. [2024-06-21 18:49:07,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 133 transitions, 1077 flow [2024-06-21 18:49:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 18:49:07,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 18:49:07,801 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 572 flow. Second operand 7 states and 169 transitions. [2024-06-21 18:49:07,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 133 transitions, 1077 flow [2024-06-21 18:49:07,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 133 transitions, 964 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:07,833 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 783 flow [2024-06-21 18:49:07,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2024-06-21 18:49:07,835 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-21 18:49:07,836 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 783 flow [2024-06-21 18:49:07,836 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) [2024-06-21 18:49:07,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:07,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:07,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:49:07,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:07,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:07,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1032687198, now seen corresponding path program 1 times [2024-06-21 18:49:07,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348651977] [2024-06-21 18:49:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:09,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:09,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348651977] [2024-06-21 18:49:09,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348651977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:09,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:09,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:09,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410590436] [2024-06-21 18:49:09,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:09,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:09,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:09,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:09,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:09,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:09,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 783 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:09,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:09,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:09,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:11,625 INFO L124 PetriNetUnfolderBase]: 11703/16158 cut-off events. [2024-06-21 18:49:11,625 INFO L125 PetriNetUnfolderBase]: For 66227/66227 co-relation queries the response was YES. [2024-06-21 18:49:11,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58632 conditions, 16158 events. 11703/16158 cut-off events. For 66227/66227 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 87022 event pairs, 6386 based on Foata normal form. 3/16151 useless extension candidates. Maximal degree in co-relation 58596. Up to 15734 conditions per place. [2024-06-21 18:49:11,738 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 106 selfloop transitions, 33 changer transitions 0/145 dead transitions. [2024-06-21 18:49:11,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 145 transitions, 1237 flow [2024-06-21 18:49:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 18:49:11,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-21 18:49:11,741 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 783 flow. Second operand 8 states and 180 transitions. [2024-06-21 18:49:11,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 145 transitions, 1237 flow [2024-06-21 18:49:11,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 145 transitions, 1157 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:11,794 INFO L231 Difference]: Finished difference. Result has 89 places, 112 transitions, 861 flow [2024-06-21 18:49:11,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=89, PETRI_TRANSITIONS=112} [2024-06-21 18:49:11,795 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-21 18:49:11,795 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 112 transitions, 861 flow [2024-06-21 18:49:11,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:11,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:11,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:11,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:49:11,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:11,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -276881566, now seen corresponding path program 2 times [2024-06-21 18:49:11,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:11,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204197283] [2024-06-21 18:49:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:11,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:13,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:13,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204197283] [2024-06-21 18:49:13,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204197283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:13,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:13,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:13,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473585917] [2024-06-21 18:49:13,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:13,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:13,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:13,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:13,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 112 transitions, 861 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:13,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:13,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:13,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:15,222 INFO L124 PetriNetUnfolderBase]: 11756/16244 cut-off events. [2024-06-21 18:49:15,222 INFO L125 PetriNetUnfolderBase]: For 84502/84514 co-relation queries the response was YES. [2024-06-21 18:49:15,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62813 conditions, 16244 events. 11756/16244 cut-off events. For 84502/84514 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 87633 event pairs, 6407 based on Foata normal form. 11/16239 useless extension candidates. Maximal degree in co-relation 62776. Up to 15648 conditions per place. [2024-06-21 18:49:15,387 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 92 selfloop transitions, 65 changer transitions 0/163 dead transitions. [2024-06-21 18:49:15,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 163 transitions, 1543 flow [2024-06-21 18:49:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:49:15,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-21 18:49:15,389 INFO L175 Difference]: Start difference. First operand has 89 places, 112 transitions, 861 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:49:15,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 163 transitions, 1543 flow [2024-06-21 18:49:15,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 163 transitions, 1464 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:15,437 INFO L231 Difference]: Finished difference. Result has 93 places, 124 transitions, 1073 flow [2024-06-21 18:49:15,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1073, PETRI_PLACES=93, PETRI_TRANSITIONS=124} [2024-06-21 18:49:15,438 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-21 18:49:15,438 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 124 transitions, 1073 flow [2024-06-21 18:49:15,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:15,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:15,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:15,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:49:15,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:15,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash -276881380, now seen corresponding path program 1 times [2024-06-21 18:49:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:15,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480644499] [2024-06-21 18:49:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:16,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:16,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480644499] [2024-06-21 18:49:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480644499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:16,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:16,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:16,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106287716] [2024-06-21 18:49:16,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:16,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:16,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:16,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:16,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:16,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:16,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 124 transitions, 1073 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:16,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:16,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:16,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:19,205 INFO L124 PetriNetUnfolderBase]: 11862/16411 cut-off events. [2024-06-21 18:49:19,205 INFO L125 PetriNetUnfolderBase]: For 107924/107942 co-relation queries the response was YES. [2024-06-21 18:49:19,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67418 conditions, 16411 events. 11862/16411 cut-off events. For 107924/107942 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 88617 event pairs, 5741 based on Foata normal form. 14/16410 useless extension candidates. Maximal degree in co-relation 67379. Up to 15756 conditions per place. [2024-06-21 18:49:19,301 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 112 selfloop transitions, 59 changer transitions 0/177 dead transitions. [2024-06-21 18:49:19,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 177 transitions, 1791 flow [2024-06-21 18:49:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 18:49:19,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2024-06-21 18:49:19,304 INFO L175 Difference]: Start difference. First operand has 93 places, 124 transitions, 1073 flow. Second operand 7 states and 179 transitions. [2024-06-21 18:49:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 177 transitions, 1791 flow [2024-06-21 18:49:19,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 177 transitions, 1768 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 18:49:19,355 INFO L231 Difference]: Finished difference. Result has 99 places, 136 transitions, 1323 flow [2024-06-21 18:49:19,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1323, PETRI_PLACES=99, PETRI_TRANSITIONS=136} [2024-06-21 18:49:19,355 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 18:49:19,355 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 136 transitions, 1323 flow [2024-06-21 18:49:19,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:19,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:19,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:49:19,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:19,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash 577937188, now seen corresponding path program 2 times [2024-06-21 18:49:19,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:19,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786634477] [2024-06-21 18:49:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:20,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:20,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786634477] [2024-06-21 18:49:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786634477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:20,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440688768] [2024-06-21 18:49:20,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:20,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:20,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:20,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 136 transitions, 1323 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:20,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:20,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:20,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:22,900 INFO L124 PetriNetUnfolderBase]: 11906/16465 cut-off events. [2024-06-21 18:49:22,900 INFO L125 PetriNetUnfolderBase]: For 131259/131271 co-relation queries the response was YES. [2024-06-21 18:49:22,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71877 conditions, 16465 events. 11906/16465 cut-off events. For 131259/131271 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 88842 event pairs, 5708 based on Foata normal form. 14/16468 useless extension candidates. Maximal degree in co-relation 71834. Up to 15794 conditions per place. [2024-06-21 18:49:23,005 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 67 changer transitions 0/177 dead transitions. [2024-06-21 18:49:23,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 177 transitions, 1899 flow [2024-06-21 18:49:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 18:49:23,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 18:49:23,024 INFO L175 Difference]: Start difference. First operand has 99 places, 136 transitions, 1323 flow. Second operand 7 states and 172 transitions. [2024-06-21 18:49:23,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 177 transitions, 1899 flow [2024-06-21 18:49:23,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 177 transitions, 1824 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:23,162 INFO L231 Difference]: Finished difference. Result has 102 places, 140 transitions, 1447 flow [2024-06-21 18:49:23,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1447, PETRI_PLACES=102, PETRI_TRANSITIONS=140} [2024-06-21 18:49:23,163 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-21 18:49:23,163 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 140 transitions, 1447 flow [2024-06-21 18:49:23,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:23,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:23,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:23,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:49:23,164 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:23,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash -170352158, now seen corresponding path program 3 times [2024-06-21 18:49:23,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:23,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206538045] [2024-06-21 18:49:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:23,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:24,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:24,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206538045] [2024-06-21 18:49:24,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206538045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:24,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:24,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841856198] [2024-06-21 18:49:24,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:24,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:24,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 140 transitions, 1447 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:24,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:24,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:24,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:26,740 INFO L124 PetriNetUnfolderBase]: 11897/16444 cut-off events. [2024-06-21 18:49:26,740 INFO L125 PetriNetUnfolderBase]: For 146494/146494 co-relation queries the response was YES. [2024-06-21 18:49:26,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73415 conditions, 16444 events. 11897/16444 cut-off events. For 146494/146494 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 88666 event pairs, 5975 based on Foata normal form. 3/16431 useless extension candidates. Maximal degree in co-relation 73369. Up to 15843 conditions per place. [2024-06-21 18:49:26,892 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 66 changer transitions 0/176 dead transitions. [2024-06-21 18:49:26,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 176 transitions, 1979 flow [2024-06-21 18:49:26,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 18:49:26,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 18:49:26,893 INFO L175 Difference]: Start difference. First operand has 102 places, 140 transitions, 1447 flow. Second operand 7 states and 172 transitions. [2024-06-21 18:49:26,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 176 transitions, 1979 flow [2024-06-21 18:49:27,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 176 transitions, 1838 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:27,017 INFO L231 Difference]: Finished difference. Result has 106 places, 140 transitions, 1452 flow [2024-06-21 18:49:27,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1452, PETRI_PLACES=106, PETRI_TRANSITIONS=140} [2024-06-21 18:49:27,017 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-21 18:49:27,018 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 140 transitions, 1452 flow [2024-06-21 18:49:27,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:27,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:27,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:49:27,018 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:27,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:27,019 INFO L85 PathProgramCache]: Analyzing trace with hash -272239750, now seen corresponding path program 3 times [2024-06-21 18:49:27,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:27,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953974693] [2024-06-21 18:49:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:28,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953974693] [2024-06-21 18:49:28,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953974693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:28,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:28,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:28,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7547938] [2024-06-21 18:49:28,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:28,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:28,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:28,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:28,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 140 transitions, 1452 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:28,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:28,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:28,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:30,404 INFO L124 PetriNetUnfolderBase]: 11879/16429 cut-off events. [2024-06-21 18:49:30,404 INFO L125 PetriNetUnfolderBase]: For 160646/160658 co-relation queries the response was YES. [2024-06-21 18:49:30,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74252 conditions, 16429 events. 11879/16429 cut-off events. For 160646/160658 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 88700 event pairs, 5705 based on Foata normal form. 14/16432 useless extension candidates. Maximal degree in co-relation 74203. Up to 15767 conditions per place. [2024-06-21 18:49:30,525 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 111 selfloop transitions, 63 changer transitions 0/180 dead transitions. [2024-06-21 18:49:30,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 180 transitions, 2008 flow [2024-06-21 18:49:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:49:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:49:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 18:49:30,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 18:49:30,528 INFO L175 Difference]: Start difference. First operand has 106 places, 140 transitions, 1452 flow. Second operand 7 states and 174 transitions. [2024-06-21 18:49:30,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 180 transitions, 2008 flow [2024-06-21 18:49:30,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 180 transitions, 1825 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:30,683 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1409 flow [2024-06-21 18:49:30,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1409, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2024-06-21 18:49:30,683 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 18:49:30,683 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1409 flow [2024-06-21 18:49:30,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:30,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:30,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:30,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:49:30,685 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:30,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:30,685 INFO L85 PathProgramCache]: Analyzing trace with hash -808566324, now seen corresponding path program 4 times [2024-06-21 18:49:30,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:30,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707480794] [2024-06-21 18:49:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:30,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:31,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:31,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707480794] [2024-06-21 18:49:31,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707480794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:31,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:31,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:31,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268513739] [2024-06-21 18:49:31,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:31,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:31,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:31,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:31,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1409 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:31,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:31,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:31,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:34,026 INFO L124 PetriNetUnfolderBase]: 11978/16573 cut-off events. [2024-06-21 18:49:34,027 INFO L125 PetriNetUnfolderBase]: For 176816/176822 co-relation queries the response was YES. [2024-06-21 18:49:34,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76110 conditions, 16573 events. 11978/16573 cut-off events. For 176816/176822 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 89421 event pairs, 5956 based on Foata normal form. 9/16578 useless extension candidates. Maximal degree in co-relation 76059. Up to 16079 conditions per place. [2024-06-21 18:49:34,196 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 144 selfloop transitions, 53 changer transitions 0/203 dead transitions. [2024-06-21 18:49:34,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 203 transitions, 2120 flow [2024-06-21 18:49:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 18:49:34,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-21 18:49:34,198 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1409 flow. Second operand 8 states and 191 transitions. [2024-06-21 18:49:34,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 203 transitions, 2120 flow [2024-06-21 18:49:34,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 203 transitions, 2043 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:34,376 INFO L231 Difference]: Finished difference. Result has 113 places, 164 transitions, 1689 flow [2024-06-21 18:49:34,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1689, PETRI_PLACES=113, PETRI_TRANSITIONS=164} [2024-06-21 18:49:34,377 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-21 18:49:34,377 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 164 transitions, 1689 flow [2024-06-21 18:49:34,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:34,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:34,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:49:34,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:34,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1284766064, now seen corresponding path program 5 times [2024-06-21 18:49:34,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148763654] [2024-06-21 18:49:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:35,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:35,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148763654] [2024-06-21 18:49:35,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148763654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:35,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:35,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48575847] [2024-06-21 18:49:35,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:35,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:35,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:35,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 164 transitions, 1689 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:35,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:35,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:35,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:37,395 INFO L124 PetriNetUnfolderBase]: 12120/16778 cut-off events. [2024-06-21 18:49:37,395 INFO L125 PetriNetUnfolderBase]: For 197475/197487 co-relation queries the response was YES. [2024-06-21 18:49:37,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78806 conditions, 16778 events. 12120/16778 cut-off events. For 197475/197487 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 90448 event pairs, 5956 based on Foata normal form. 15/16789 useless extension candidates. Maximal degree in co-relation 78752. Up to 16192 conditions per place. [2024-06-21 18:49:37,546 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 152 selfloop transitions, 96 changer transitions 0/254 dead transitions. [2024-06-21 18:49:37,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 254 transitions, 2802 flow [2024-06-21 18:49:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-21 18:49:37,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480769230769231 [2024-06-21 18:49:37,564 INFO L175 Difference]: Start difference. First operand has 113 places, 164 transitions, 1689 flow. Second operand 10 states and 233 transitions. [2024-06-21 18:49:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 254 transitions, 2802 flow [2024-06-21 18:49:37,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 254 transitions, 2640 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:37,781 INFO L231 Difference]: Finished difference. Result has 122 places, 204 transitions, 2245 flow [2024-06-21 18:49:37,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2245, PETRI_PLACES=122, PETRI_TRANSITIONS=204} [2024-06-21 18:49:37,782 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-21 18:49:37,782 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 204 transitions, 2245 flow [2024-06-21 18:49:37,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:37,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:37,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:37,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:49:37,783 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:37,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 386175174, now seen corresponding path program 4 times [2024-06-21 18:49:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:37,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228359040] [2024-06-21 18:49:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:38,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228359040] [2024-06-21 18:49:38,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228359040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:38,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:38,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:38,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489978778] [2024-06-21 18:49:38,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:38,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:38,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:38,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 204 transitions, 2245 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:38,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:38,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:38,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:41,447 INFO L124 PetriNetUnfolderBase]: 12246/16966 cut-off events. [2024-06-21 18:49:41,447 INFO L125 PetriNetUnfolderBase]: For 220863/220884 co-relation queries the response was YES. [2024-06-21 18:49:41,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81420 conditions, 16966 events. 12246/16966 cut-off events. For 220863/220884 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 91694 event pairs, 5733 based on Foata normal form. 18/16976 useless extension candidates. Maximal degree in co-relation 81363. Up to 16203 conditions per place. [2024-06-21 18:49:41,567 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 174 selfloop transitions, 84 changer transitions 0/264 dead transitions. [2024-06-21 18:49:41,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 264 transitions, 3105 flow [2024-06-21 18:49:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 18:49:41,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-21 18:49:41,569 INFO L175 Difference]: Start difference. First operand has 122 places, 204 transitions, 2245 flow. Second operand 8 states and 198 transitions. [2024-06-21 18:49:41,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 264 transitions, 3105 flow [2024-06-21 18:49:41,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 264 transitions, 2845 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:41,728 INFO L231 Difference]: Finished difference. Result has 124 places, 222 transitions, 2376 flow [2024-06-21 18:49:41,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2001, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2376, PETRI_PLACES=124, PETRI_TRANSITIONS=222} [2024-06-21 18:49:41,729 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-21 18:49:41,729 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 222 transitions, 2376 flow [2024-06-21 18:49:41,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:41,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:41,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:41,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:49:41,730 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:41,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash 409411968, now seen corresponding path program 6 times [2024-06-21 18:49:41,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:41,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120730060] [2024-06-21 18:49:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:41,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:42,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:42,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120730060] [2024-06-21 18:49:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120730060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:42,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:42,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:42,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367533890] [2024-06-21 18:49:42,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:42,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:42,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:42,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:42,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:42,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:42,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 222 transitions, 2376 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:42,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:42,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:42,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:45,162 INFO L124 PetriNetUnfolderBase]: 12291/17021 cut-off events. [2024-06-21 18:49:45,162 INFO L125 PetriNetUnfolderBase]: For 241096/241108 co-relation queries the response was YES. [2024-06-21 18:49:45,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83167 conditions, 17021 events. 12291/17021 cut-off events. For 241096/241108 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 91804 event pairs, 5984 based on Foata normal form. 11/17026 useless extension candidates. Maximal degree in co-relation 83110. Up to 16261 conditions per place. [2024-06-21 18:49:45,300 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 128 selfloop transitions, 142 changer transitions 0/276 dead transitions. [2024-06-21 18:49:45,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 276 transitions, 3250 flow [2024-06-21 18:49:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 18:49:45,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-21 18:49:45,316 INFO L175 Difference]: Start difference. First operand has 124 places, 222 transitions, 2376 flow. Second operand 8 states and 194 transitions. [2024-06-21 18:49:45,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 276 transitions, 3250 flow [2024-06-21 18:49:45,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 276 transitions, 3032 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:45,543 INFO L231 Difference]: Finished difference. Result has 130 places, 238 transitions, 2673 flow [2024-06-21 18:49:45,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2673, PETRI_PLACES=130, PETRI_TRANSITIONS=238} [2024-06-21 18:49:45,544 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 18:49:45,544 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 238 transitions, 2673 flow [2024-06-21 18:49:45,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:45,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:45,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:49:45,545 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:45,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash 577946116, now seen corresponding path program 1 times [2024-06-21 18:49:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795409025] [2024-06-21 18:49:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:45,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:47,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:47,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795409025] [2024-06-21 18:49:47,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795409025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:47,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:47,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:47,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186156570] [2024-06-21 18:49:47,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:47,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:47,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:47,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:49:47,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 238 transitions, 2673 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:47,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:47,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:49:47,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:49,965 INFO L124 PetriNetUnfolderBase]: 10584/14824 cut-off events. [2024-06-21 18:49:49,966 INFO L125 PetriNetUnfolderBase]: For 229769/229769 co-relation queries the response was YES. [2024-06-21 18:49:50,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74133 conditions, 14824 events. 10584/14824 cut-off events. For 229769/229769 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 81282 event pairs, 5054 based on Foata normal form. 6/14680 useless extension candidates. Maximal degree in co-relation 74073. Up to 14290 conditions per place. [2024-06-21 18:49:50,103 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 247 selfloop transitions, 19 changer transitions 0/273 dead transitions. [2024-06-21 18:49:50,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 273 transitions, 3415 flow [2024-06-21 18:49:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 18:49:50,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 18:49:50,105 INFO L175 Difference]: Start difference. First operand has 130 places, 238 transitions, 2673 flow. Second operand 8 states and 182 transitions. [2024-06-21 18:49:50,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 273 transitions, 3415 flow [2024-06-21 18:49:50,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 273 transitions, 3172 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:50,305 INFO L231 Difference]: Finished difference. Result has 134 places, 241 transitions, 2532 flow [2024-06-21 18:49:50,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2532, PETRI_PLACES=134, PETRI_TRANSITIONS=241} [2024-06-21 18:49:50,306 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-21 18:49:50,306 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 241 transitions, 2532 flow [2024-06-21 18:49:50,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:50,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:50,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:50,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:49:50,307 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:50,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2000730435, now seen corresponding path program 1 times [2024-06-21 18:49:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146927279] [2024-06-21 18:49:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146927279] [2024-06-21 18:49:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146927279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:51,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:51,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:49:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013114777] [2024-06-21 18:49:51,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:49:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:51,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:49:51,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:49:51,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 18:49:51,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 241 transitions, 2532 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) [2024-06-21 18:49:51,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:51,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 18:49:51,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:53,202 INFO L124 PetriNetUnfolderBase]: 11494/16258 cut-off events. [2024-06-21 18:49:53,202 INFO L125 PetriNetUnfolderBase]: For 285523/285526 co-relation queries the response was YES. [2024-06-21 18:49:53,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83236 conditions, 16258 events. 11494/16258 cut-off events. For 285523/285526 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 91315 event pairs, 5974 based on Foata normal form. 5/16247 useless extension candidates. Maximal degree in co-relation 83175. Up to 15588 conditions per place. [2024-06-21 18:49:53,351 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 221 selfloop transitions, 12 changer transitions 0/258 dead transitions. [2024-06-21 18:49:53,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 258 transitions, 3104 flow [2024-06-21 18:49:53,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:49:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:49:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 18:49:53,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576923076923077 [2024-06-21 18:49:53,352 INFO L175 Difference]: Start difference. First operand has 134 places, 241 transitions, 2532 flow. Second operand 5 states and 119 transitions. [2024-06-21 18:49:53,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 258 transitions, 3104 flow [2024-06-21 18:49:53,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 258 transitions, 3019 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:53,618 INFO L231 Difference]: Finished difference. Result has 133 places, 245 transitions, 2530 flow [2024-06-21 18:49:53,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2530, PETRI_PLACES=133, PETRI_TRANSITIONS=245} [2024-06-21 18:49:53,618 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-21 18:49:53,618 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 245 transitions, 2530 flow [2024-06-21 18:49:53,619 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) [2024-06-21 18:49:53,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:53,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:53,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:49:53,619 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:53,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:53,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1349629050, now seen corresponding path program 1 times [2024-06-21 18:49:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:53,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028638965] [2024-06-21 18:49:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028638965] [2024-06-21 18:49:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028638965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:55,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:55,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924115161] [2024-06-21 18:49:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:55,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:55,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 245 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:55,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:55,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:55,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:57,747 INFO L124 PetriNetUnfolderBase]: 12313/17070 cut-off events. [2024-06-21 18:49:57,748 INFO L125 PetriNetUnfolderBase]: For 319062/319064 co-relation queries the response was YES. [2024-06-21 18:49:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90524 conditions, 17070 events. 12313/17070 cut-off events. For 319062/319064 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 92203 event pairs, 5826 based on Foata normal form. 8/17062 useless extension candidates. Maximal degree in co-relation 90464. Up to 16442 conditions per place. [2024-06-21 18:49:57,900 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 205 selfloop transitions, 77 changer transitions 0/288 dead transitions. [2024-06-21 18:49:57,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 288 transitions, 3338 flow [2024-06-21 18:49:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 18:49:57,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337606837606838 [2024-06-21 18:49:57,902 INFO L175 Difference]: Start difference. First operand has 133 places, 245 transitions, 2530 flow. Second operand 9 states and 203 transitions. [2024-06-21 18:49:57,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 288 transitions, 3338 flow [2024-06-21 18:49:58,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 288 transitions, 3285 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:58,189 INFO L231 Difference]: Finished difference. Result has 139 places, 249 transitions, 2715 flow [2024-06-21 18:49:58,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2477, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2715, PETRI_PLACES=139, PETRI_TRANSITIONS=249} [2024-06-21 18:49:58,197 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-21 18:49:58,197 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 249 transitions, 2715 flow [2024-06-21 18:49:58,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:58,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:58,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:49:58,198 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:49:58,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1349773200, now seen corresponding path program 2 times [2024-06-21 18:49:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:58,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851979577] [2024-06-21 18:49:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:58,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:59,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:59,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851979577] [2024-06-21 18:49:59,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851979577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:59,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:59,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:59,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201993110] [2024-06-21 18:49:59,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:59,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:59,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:49:59,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 249 transitions, 2715 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:59,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:59,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:49:59,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:02,408 INFO L124 PetriNetUnfolderBase]: 12481/17366 cut-off events. [2024-06-21 18:50:02,408 INFO L125 PetriNetUnfolderBase]: For 359208/359217 co-relation queries the response was YES. [2024-06-21 18:50:02,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96387 conditions, 17366 events. 12481/17366 cut-off events. For 359208/359217 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 94482 event pairs, 5452 based on Foata normal form. 10/17345 useless extension candidates. Maximal degree in co-relation 96326. Up to 15928 conditions per place. [2024-06-21 18:50:02,589 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 157 selfloop transitions, 162 changer transitions 0/325 dead transitions. [2024-06-21 18:50:02,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 325 transitions, 4309 flow [2024-06-21 18:50:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 18:50:02,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 18:50:02,591 INFO L175 Difference]: Start difference. First operand has 139 places, 249 transitions, 2715 flow. Second operand 8 states and 212 transitions. [2024-06-21 18:50:02,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 325 transitions, 4309 flow [2024-06-21 18:50:02,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 325 transitions, 4113 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:02,996 INFO L231 Difference]: Finished difference. Result has 140 places, 265 transitions, 3138 flow [2024-06-21 18:50:02,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3138, PETRI_PLACES=140, PETRI_TRANSITIONS=265} [2024-06-21 18:50:02,997 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-21 18:50:02,997 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 265 transitions, 3138 flow [2024-06-21 18:50:02,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:02,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:02,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:02,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:50:02,997 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:02,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1349778780, now seen corresponding path program 3 times [2024-06-21 18:50:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:02,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150516888] [2024-06-21 18:50:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:04,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:04,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150516888] [2024-06-21 18:50:04,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150516888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:04,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:04,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945867128] [2024-06-21 18:50:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:04,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:04,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 265 transitions, 3138 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:04,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:04,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:04,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:07,073 INFO L124 PetriNetUnfolderBase]: 12463/17342 cut-off events. [2024-06-21 18:50:07,073 INFO L125 PetriNetUnfolderBase]: For 401159/401171 co-relation queries the response was YES. [2024-06-21 18:50:07,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100266 conditions, 17342 events. 12463/17342 cut-off events. For 401159/401171 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 94154 event pairs, 4924 based on Foata normal form. 12/17323 useless extension candidates. Maximal degree in co-relation 100203. Up to 15913 conditions per place. [2024-06-21 18:50:07,298 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 146 selfloop transitions, 168 changer transitions 0/320 dead transitions. [2024-06-21 18:50:07,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 320 transitions, 4318 flow [2024-06-21 18:50:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 18:50:07,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-21 18:50:07,300 INFO L175 Difference]: Start difference. First operand has 140 places, 265 transitions, 3138 flow. Second operand 8 states and 207 transitions. [2024-06-21 18:50:07,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 320 transitions, 4318 flow [2024-06-21 18:50:07,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 320 transitions, 4217 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-06-21 18:50:07,770 INFO L231 Difference]: Finished difference. Result has 147 places, 265 transitions, 3388 flow [2024-06-21 18:50:07,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3388, PETRI_PLACES=147, PETRI_TRANSITIONS=265} [2024-06-21 18:50:07,771 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-21 18:50:07,771 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 265 transitions, 3388 flow [2024-06-21 18:50:07,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:07,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:07,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:07,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:50:07,772 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:07,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 736185312, now seen corresponding path program 4 times [2024-06-21 18:50:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:07,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47183911] [2024-06-21 18:50:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:07,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47183911] [2024-06-21 18:50:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47183911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707307933] [2024-06-21 18:50:09,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:09,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:09,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:09,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 265 transitions, 3388 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:09,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:09,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:09,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:12,386 INFO L124 PetriNetUnfolderBase]: 12507/17392 cut-off events. [2024-06-21 18:50:12,386 INFO L125 PetriNetUnfolderBase]: For 432269/432269 co-relation queries the response was YES. [2024-06-21 18:50:12,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102625 conditions, 17392 events. 12507/17392 cut-off events. For 432269/432269 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 94354 event pairs, 4868 based on Foata normal form. 6/17373 useless extension candidates. Maximal degree in co-relation 102558. Up to 15951 conditions per place. [2024-06-21 18:50:12,534 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 122 selfloop transitions, 185 changer transitions 0/313 dead transitions. [2024-06-21 18:50:12,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 313 transitions, 4436 flow [2024-06-21 18:50:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 18:50:12,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 18:50:12,536 INFO L175 Difference]: Start difference. First operand has 147 places, 265 transitions, 3388 flow. Second operand 8 states and 199 transitions. [2024-06-21 18:50:12,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 313 transitions, 4436 flow [2024-06-21 18:50:12,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 313 transitions, 4077 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:12,884 INFO L231 Difference]: Finished difference. Result has 150 places, 269 transitions, 3497 flow [2024-06-21 18:50:12,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3497, PETRI_PLACES=150, PETRI_TRANSITIONS=269} [2024-06-21 18:50:12,885 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-21 18:50:12,885 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 269 transitions, 3497 flow [2024-06-21 18:50:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:12,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:12,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:12,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:50:12,887 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:12,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1493663730, now seen corresponding path program 5 times [2024-06-21 18:50:12,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:12,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692485699] [2024-06-21 18:50:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:12,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:14,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:14,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692485699] [2024-06-21 18:50:14,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692485699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:14,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:14,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170428443] [2024-06-21 18:50:14,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:14,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:14,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 269 transitions, 3497 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:14,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:14,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:14,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:17,655 INFO L124 PetriNetUnfolderBase]: 12551/17467 cut-off events. [2024-06-21 18:50:17,655 INFO L125 PetriNetUnfolderBase]: For 461890/461890 co-relation queries the response was YES. [2024-06-21 18:50:17,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104472 conditions, 17467 events. 12551/17467 cut-off events. For 461890/461890 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 94846 event pairs, 4865 based on Foata normal form. 6/17449 useless extension candidates. Maximal degree in co-relation 104402. Up to 15989 conditions per place. [2024-06-21 18:50:17,853 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 146 selfloop transitions, 173 changer transitions 0/325 dead transitions. [2024-06-21 18:50:17,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 325 transitions, 4777 flow [2024-06-21 18:50:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 18:50:17,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 18:50:17,855 INFO L175 Difference]: Start difference. First operand has 150 places, 269 transitions, 3497 flow. Second operand 8 states and 204 transitions. [2024-06-21 18:50:17,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 325 transitions, 4777 flow [2024-06-21 18:50:18,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 325 transitions, 4466 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:18,342 INFO L231 Difference]: Finished difference. Result has 153 places, 273 transitions, 3630 flow [2024-06-21 18:50:18,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3630, PETRI_PLACES=153, PETRI_TRANSITIONS=273} [2024-06-21 18:50:18,343 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-21 18:50:18,343 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 273 transitions, 3630 flow [2024-06-21 18:50:18,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:18,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:18,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:18,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:50:18,344 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:18,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash -985942168, now seen corresponding path program 6 times [2024-06-21 18:50:18,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:18,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821836059] [2024-06-21 18:50:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:19,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:19,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821836059] [2024-06-21 18:50:19,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821836059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:19,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:19,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:19,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944505652] [2024-06-21 18:50:19,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:19,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:19,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:19,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 273 transitions, 3630 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:19,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:19,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:19,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:22,797 INFO L124 PetriNetUnfolderBase]: 12533/17443 cut-off events. [2024-06-21 18:50:22,797 INFO L125 PetriNetUnfolderBase]: For 489475/489475 co-relation queries the response was YES. [2024-06-21 18:50:22,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105186 conditions, 17443 events. 12533/17443 cut-off events. For 489475/489475 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 94792 event pairs, 5129 based on Foata normal form. 6/17425 useless extension candidates. Maximal degree in co-relation 105114. Up to 15974 conditions per place. [2024-06-21 18:50:22,980 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 148 selfloop transitions, 171 changer transitions 0/325 dead transitions. [2024-06-21 18:50:22,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 325 transitions, 4714 flow [2024-06-21 18:50:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 18:50:22,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 18:50:22,982 INFO L175 Difference]: Start difference. First operand has 153 places, 273 transitions, 3630 flow. Second operand 8 states and 202 transitions. [2024-06-21 18:50:22,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 325 transitions, 4714 flow [2024-06-21 18:50:23,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 325 transitions, 4355 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:23,422 INFO L231 Difference]: Finished difference. Result has 157 places, 273 transitions, 3627 flow [2024-06-21 18:50:23,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3627, PETRI_PLACES=157, PETRI_TRANSITIONS=273} [2024-06-21 18:50:23,422 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2024-06-21 18:50:23,422 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 273 transitions, 3627 flow [2024-06-21 18:50:23,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:23,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:23,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:23,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:50:23,423 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:23,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash 448403596, now seen corresponding path program 7 times [2024-06-21 18:50:23,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:23,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761575093] [2024-06-21 18:50:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:24,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:24,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761575093] [2024-06-21 18:50:24,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761575093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:24,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:24,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16683276] [2024-06-21 18:50:24,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:24,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:24,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:24,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:24,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 273 transitions, 3627 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:24,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:24,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:24,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:27,739 INFO L124 PetriNetUnfolderBase]: 12761/17734 cut-off events. [2024-06-21 18:50:27,739 INFO L125 PetriNetUnfolderBase]: For 533265/533271 co-relation queries the response was YES. [2024-06-21 18:50:27,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108271 conditions, 17734 events. 12761/17734 cut-off events. For 533265/533271 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 96472 event pairs, 5581 based on Foata normal form. 12/17740 useless extension candidates. Maximal degree in co-relation 108196. Up to 16867 conditions per place. [2024-06-21 18:50:27,930 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 236 selfloop transitions, 118 changer transitions 0/360 dead transitions. [2024-06-21 18:50:27,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 360 transitions, 5231 flow [2024-06-21 18:50:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:50:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:50:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-06-21 18:50:27,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632867132867133 [2024-06-21 18:50:27,932 INFO L175 Difference]: Start difference. First operand has 157 places, 273 transitions, 3627 flow. Second operand 11 states and 265 transitions. [2024-06-21 18:50:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 360 transitions, 5231 flow [2024-06-21 18:50:28,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 360 transitions, 4840 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:28,643 INFO L231 Difference]: Finished difference. Result has 164 places, 295 transitions, 3886 flow [2024-06-21 18:50:28,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3886, PETRI_PLACES=164, PETRI_TRANSITIONS=295} [2024-06-21 18:50:28,643 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-21 18:50:28,643 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 295 transitions, 3886 flow [2024-06-21 18:50:28,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:28,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:28,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:50:28,644 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:28,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash -917194476, now seen corresponding path program 8 times [2024-06-21 18:50:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:28,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337168710] [2024-06-21 18:50:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:30,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:30,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337168710] [2024-06-21 18:50:30,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337168710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:30,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:30,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:30,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764691887] [2024-06-21 18:50:30,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:30,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:30,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:30,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:30,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:30,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 295 transitions, 3886 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:30,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:30,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:30,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:33,409 INFO L124 PetriNetUnfolderBase]: 12841/17868 cut-off events. [2024-06-21 18:50:33,410 INFO L125 PetriNetUnfolderBase]: For 561313/561319 co-relation queries the response was YES. [2024-06-21 18:50:33,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109877 conditions, 17868 events. 12841/17868 cut-off events. For 561313/561319 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 97023 event pairs, 5533 based on Foata normal form. 16/17880 useless extension candidates. Maximal degree in co-relation 109799. Up to 17092 conditions per place. [2024-06-21 18:50:33,588 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 250 selfloop transitions, 101 changer transitions 0/357 dead transitions. [2024-06-21 18:50:33,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 357 transitions, 5048 flow [2024-06-21 18:50:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 18:50:33,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45726495726495725 [2024-06-21 18:50:33,590 INFO L175 Difference]: Start difference. First operand has 164 places, 295 transitions, 3886 flow. Second operand 9 states and 214 transitions. [2024-06-21 18:50:33,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 357 transitions, 5048 flow [2024-06-21 18:50:34,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 357 transitions, 4797 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:34,467 INFO L231 Difference]: Finished difference. Result has 168 places, 311 transitions, 4143 flow [2024-06-21 18:50:34,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4143, PETRI_PLACES=168, PETRI_TRANSITIONS=311} [2024-06-21 18:50:34,467 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-21 18:50:34,468 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 311 transitions, 4143 flow [2024-06-21 18:50:34,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:34,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:34,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:34,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:50:34,468 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:34,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1781054036, now seen corresponding path program 9 times [2024-06-21 18:50:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:34,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280250173] [2024-06-21 18:50:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:35,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:35,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280250173] [2024-06-21 18:50:35,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280250173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:35,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:35,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:35,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147364150] [2024-06-21 18:50:35,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:35,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:35,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:35,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:35,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:35,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 311 transitions, 4143 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:35,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:35,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:39,050 INFO L124 PetriNetUnfolderBase]: 13137/18303 cut-off events. [2024-06-21 18:50:39,050 INFO L125 PetriNetUnfolderBase]: For 595121/595133 co-relation queries the response was YES. [2024-06-21 18:50:39,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113097 conditions, 18303 events. 13137/18303 cut-off events. For 595121/595133 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 99755 event pairs, 4874 based on Foata normal form. 12/18307 useless extension candidates. Maximal degree in co-relation 113017. Up to 16510 conditions per place. [2024-06-21 18:50:39,445 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 142 selfloop transitions, 253 changer transitions 0/401 dead transitions. [2024-06-21 18:50:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 401 transitions, 5721 flow [2024-06-21 18:50:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 18:50:39,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2024-06-21 18:50:39,447 INFO L175 Difference]: Start difference. First operand has 168 places, 311 transitions, 4143 flow. Second operand 9 states and 230 transitions. [2024-06-21 18:50:39,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 401 transitions, 5721 flow [2024-06-21 18:50:40,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 401 transitions, 5559 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:40,162 INFO L231 Difference]: Finished difference. Result has 172 places, 347 transitions, 4949 flow [2024-06-21 18:50:40,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3981, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4949, PETRI_PLACES=172, PETRI_TRANSITIONS=347} [2024-06-21 18:50:40,163 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-21 18:50:40,163 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 347 transitions, 4949 flow [2024-06-21 18:50:40,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:40,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:40,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:40,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:50:40,163 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:40,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash -913469826, now seen corresponding path program 10 times [2024-06-21 18:50:40,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:40,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104980652] [2024-06-21 18:50:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104980652] [2024-06-21 18:50:41,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104980652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:41,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:41,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115202127] [2024-06-21 18:50:41,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:41,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:41,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:41,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:41,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:41,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 347 transitions, 4949 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:41,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:41,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:41,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:44,798 INFO L124 PetriNetUnfolderBase]: 13119/18279 cut-off events. [2024-06-21 18:50:44,799 INFO L125 PetriNetUnfolderBase]: For 635256/635265 co-relation queries the response was YES. [2024-06-21 18:50:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115827 conditions, 18279 events. 13119/18279 cut-off events. For 635256/635265 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 99697 event pairs, 4874 based on Foata normal form. 10/18281 useless extension candidates. Maximal degree in co-relation 115745. Up to 16495 conditions per place. [2024-06-21 18:50:44,968 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 130 selfloop transitions, 261 changer transitions 0/397 dead transitions. [2024-06-21 18:50:44,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 397 transitions, 6001 flow [2024-06-21 18:50:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 18:50:44,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 18:50:44,970 INFO L175 Difference]: Start difference. First operand has 172 places, 347 transitions, 4949 flow. Second operand 9 states and 225 transitions. [2024-06-21 18:50:44,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 397 transitions, 6001 flow [2024-06-21 18:50:45,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 397 transitions, 5242 flow, removed 97 selfloop flow, removed 6 redundant places. [2024-06-21 18:50:45,596 INFO L231 Difference]: Finished difference. Result has 175 places, 347 transitions, 4748 flow [2024-06-21 18:50:45,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4210, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4748, PETRI_PLACES=175, PETRI_TRANSITIONS=347} [2024-06-21 18:50:45,596 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-21 18:50:45,597 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 347 transitions, 4748 flow [2024-06-21 18:50:45,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:45,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:45,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:45,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:50:45,709 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:45,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:45,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1893102841, now seen corresponding path program 1 times [2024-06-21 18:50:45,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:45,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760066028] [2024-06-21 18:50:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:45,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:46,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:46,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760066028] [2024-06-21 18:50:46,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760066028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:46,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:46,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:50:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543328733] [2024-06-21 18:50:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:46,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:50:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:50:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:50:46,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:46,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 347 transitions, 4748 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) [2024-06-21 18:50:46,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:46,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:49,740 INFO L124 PetriNetUnfolderBase]: 13883/19154 cut-off events. [2024-06-21 18:50:49,741 INFO L125 PetriNetUnfolderBase]: For 756020/756061 co-relation queries the response was YES. [2024-06-21 18:50:50,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124362 conditions, 19154 events. 13883/19154 cut-off events. For 756020/756061 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 103635 event pairs, 6545 based on Foata normal form. 11/19083 useless extension candidates. Maximal degree in co-relation 124280. Up to 18740 conditions per place. [2024-06-21 18:50:50,100 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 332 selfloop transitions, 24 changer transitions 0/380 dead transitions. [2024-06-21 18:50:50,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 380 transitions, 5810 flow [2024-06-21 18:50:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:50:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:50:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 18:50:50,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 18:50:50,112 INFO L175 Difference]: Start difference. First operand has 175 places, 347 transitions, 4748 flow. Second operand 6 states and 140 transitions. [2024-06-21 18:50:50,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 380 transitions, 5810 flow [2024-06-21 18:50:51,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 380 transitions, 5278 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 18:50:51,050 INFO L231 Difference]: Finished difference. Result has 175 places, 361 transitions, 4444 flow [2024-06-21 18:50:51,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4444, PETRI_PLACES=175, PETRI_TRANSITIONS=361} [2024-06-21 18:50:51,050 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-21 18:50:51,050 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 361 transitions, 4444 flow [2024-06-21 18:50:51,051 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) [2024-06-21 18:50:51,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:51,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:51,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:50:51,051 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:51,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:51,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1221998005, now seen corresponding path program 1 times [2024-06-21 18:50:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:51,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079083462] [2024-06-21 18:50:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:51,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:52,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079083462] [2024-06-21 18:50:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079083462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:52,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:52,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110102193] [2024-06-21 18:50:52,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:52,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:52,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:52,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:52,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 361 transitions, 4444 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:52,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:52,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:52,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:56,519 INFO L124 PetriNetUnfolderBase]: 13582/18972 cut-off events. [2024-06-21 18:50:56,519 INFO L125 PetriNetUnfolderBase]: For 724473/724595 co-relation queries the response was YES. [2024-06-21 18:50:56,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123081 conditions, 18972 events. 13582/18972 cut-off events. For 724473/724595 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 104463 event pairs, 5648 based on Foata normal form. 8/18919 useless extension candidates. Maximal degree in co-relation 122995. Up to 18048 conditions per place. [2024-06-21 18:50:56,690 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 318 selfloop transitions, 76 changer transitions 0/403 dead transitions. [2024-06-21 18:50:56,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 403 transitions, 5501 flow [2024-06-21 18:50:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 18:50:56,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-06-21 18:50:56,692 INFO L175 Difference]: Start difference. First operand has 175 places, 361 transitions, 4444 flow. Second operand 9 states and 202 transitions. [2024-06-21 18:50:56,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 403 transitions, 5501 flow [2024-06-21 18:50:57,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 403 transitions, 5454 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 18:50:57,467 INFO L231 Difference]: Finished difference. Result has 183 places, 364 transitions, 4638 flow [2024-06-21 18:50:57,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4638, PETRI_PLACES=183, PETRI_TRANSITIONS=364} [2024-06-21 18:50:57,468 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 128 predicate places. [2024-06-21 18:50:57,468 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 364 transitions, 4638 flow [2024-06-21 18:50:57,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:57,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:57,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:57,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:50:57,469 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:50:57,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1907380151, now seen corresponding path program 2 times [2024-06-21 18:50:57,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:57,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785908210] [2024-06-21 18:50:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:57,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:59,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:59,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785908210] [2024-06-21 18:50:59,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785908210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:59,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:59,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:50:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174738211] [2024-06-21 18:50:59,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:59,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:50:59,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:59,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:50:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:50:59,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 18:50:59,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 364 transitions, 4638 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:59,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:59,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 18:50:59,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:02,912 INFO L124 PetriNetUnfolderBase]: 13655/19077 cut-off events. [2024-06-21 18:51:02,912 INFO L125 PetriNetUnfolderBase]: For 776377/776495 co-relation queries the response was YES. [2024-06-21 18:51:02,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126941 conditions, 19077 events. 13655/19077 cut-off events. For 776377/776495 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 105116 event pairs, 5633 based on Foata normal form. 8/19021 useless extension candidates. Maximal degree in co-relation 126852. Up to 18068 conditions per place. [2024-06-21 18:51:03,086 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 327 selfloop transitions, 82 changer transitions 0/418 dead transitions. [2024-06-21 18:51:03,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 418 transitions, 5791 flow [2024-06-21 18:51:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:51:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:51:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 18:51:03,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-06-21 18:51:03,088 INFO L175 Difference]: Start difference. First operand has 183 places, 364 transitions, 4638 flow. Second operand 10 states and 226 transitions. [2024-06-21 18:51:03,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 418 transitions, 5791 flow [2024-06-21 18:51:03,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 418 transitions, 5586 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 18:51:03,904 INFO L231 Difference]: Finished difference. Result has 187 places, 370 transitions, 4721 flow [2024-06-21 18:51:03,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4721, PETRI_PLACES=187, PETRI_TRANSITIONS=370} [2024-06-21 18:51:03,905 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-21 18:51:03,905 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 370 transitions, 4721 flow [2024-06-21 18:51:03,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:03,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:03,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:03,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:51:03,906 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 18:51:03,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1106706835, now seen corresponding path program 3 times [2024-06-21 18:51:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:03,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008382027] [2024-06-21 18:51:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat