./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix002.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/mix002.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix002.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:07:05,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:07:05,471 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:07:05,480 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:07:05,481 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:07:05,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:07:05,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:07:05,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:07:05,506 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:07:05,509 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:07:05,509 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:07:05,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:07:05,510 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:07:05,511 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:07:05,511 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:07:05,512 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:07:05,512 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:07:05,512 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:07:05,512 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:07:05,513 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:07:05,513 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:07:05,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:07:05,513 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:07:05,513 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:07:05,514 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:07:05,514 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:07:05,514 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:07:05,514 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:07:05,515 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:07:05,515 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:07:05,516 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:07:05,516 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:07:05,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:07:05,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:07:05,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:07:05,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:07:05,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:07:05,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:07:05,517 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:07:05,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:07:05,517 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:07:05,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:07:05,518 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:07:05,518 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:07:05,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:07:05,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:07:05,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:07:05,784 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:07:05,784 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:07:05,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 23:07:06,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:07:07,178 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:07:07,179 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 23:07:07,195 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a497e24f/2e208ea7717044738b9e72c809e5f651/FLAG3a3065d8a [2024-06-27 23:07:07,207 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a497e24f/2e208ea7717044738b9e72c809e5f651 [2024-06-27 23:07:07,209 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:07:07,209 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:07:07,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix002.opt.yml/witness.yml [2024-06-27 23:07:07,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:07:07,264 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:07:07,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:07:07,266 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:07:07,270 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:07:07,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:07:07" (1/2) ... [2024-06-27 23:07:07,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7022e843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:07:07, skipping insertion in model container [2024-06-27 23:07:07,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:07:07" (1/2) ... [2024-06-27 23:07:07,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4aae09c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:07:07, skipping insertion in model container [2024-06-27 23:07:07,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:07:07" (2/2) ... [2024-06-27 23:07:07,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7022e843 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07, skipping insertion in model container [2024-06-27 23:07:07,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:07:07" (2/2) ... [2024-06-27 23:07:07,275 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:07:07,296 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:07:07,297 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:07:07,297 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:07:07,297 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:07:07,298 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:07:07,298 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-27 23:07:07,331 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:07:07,619 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:07:07,635 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:07:07,858 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:07:07,897 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:07:07,897 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07 WrapperNode [2024-06-27 23:07:07,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:07:07,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:07:07,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:07:07,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:07:07,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,958 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-27 23:07:07,962 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:07:07,963 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:07:07,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:07:07,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:07:07,971 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,975 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,989 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:07:07,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:07,999 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:08,001 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:08,003 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:08,020 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:07:08,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:07:08,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:07:08,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:07:08,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (1/1) ... [2024-06-27 23:07:08,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:07:08,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:07:08,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:07:08,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:07:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:07:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:07:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:07:08,100 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:07:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:07:08,101 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:07:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:07:08,101 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:07:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:07:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:07:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:07:08,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:07:08,103 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:07:08,234 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:07:08,235 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:07:08,558 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:07:08,558 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:07:08,699 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:07:08,699 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:07:08,699 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:07:08 BoogieIcfgContainer [2024-06-27 23:07:08,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:07:08,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:07:08,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:07:08,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:07:08,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:07:07" (1/4) ... [2024-06-27 23:07:08,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c01181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:07:08, skipping insertion in model container [2024-06-27 23:07:08,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:07:07" (2/4) ... [2024-06-27 23:07:08,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c01181 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:07:08, skipping insertion in model container [2024-06-27 23:07:08,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:07:07" (3/4) ... [2024-06-27 23:07:08,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c01181 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:07:08, skipping insertion in model container [2024-06-27 23:07:08,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:07:08" (4/4) ... [2024-06-27 23:07:08,705 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.opt.i [2024-06-27 23:07:08,717 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:07:08,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:07:08,717 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:07:08,763 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:07:08,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 23:07:08,823 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 23:07:08,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:07:08,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:07:08,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 23:07:08,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 23:07:08,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:07:08,846 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;@80622e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:07:08,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:07:08,850 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:07:08,851 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:07:08,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:07:08,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:08,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:07:08,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:08,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash 406084588, now seen corresponding path program 1 times [2024-06-27 23:07:08,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:08,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732288478] [2024-06-27 23:07:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:08,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:10,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732288478] [2024-06-27 23:07:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732288478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:10,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:10,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:07:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981161405] [2024-06-27 23:07:10,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:10,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:07:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:07:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:07:10,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 23:07:10,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:10,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:10,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 23:07:10,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:10,818 INFO L124 PetriNetUnfolderBase]: 1363/2148 cut-off events. [2024-06-27 23:07:10,818 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 23:07:10,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4272 conditions, 2148 events. 1363/2148 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11181 event pairs, 967 based on Foata normal form. 1/2080 useless extension candidates. Maximal degree in co-relation 4260. Up to 2037 conditions per place. [2024-06-27 23:07:10,831 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 23:07:10,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 177 flow [2024-06-27 23:07:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:07:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:07:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-27 23:07:10,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-27 23:07:10,841 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 84 transitions. [2024-06-27 23:07:10,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 177 flow [2024-06-27 23:07:10,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:10,845 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 23:07:10,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 23:07:10,849 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 23:07:10,849 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 23:07:10,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:10,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:10,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:10,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:07:10,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:10,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash -594026213, now seen corresponding path program 1 times [2024-06-27 23:07:10,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:10,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080805969] [2024-06-27 23:07:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:11,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:11,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080805969] [2024-06-27 23:07:11,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080805969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:11,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:11,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:07:11,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758681739] [2024-06-27 23:07:11,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:11,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:07:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:07:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:07:11,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 23:07:11,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:11,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:11,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 23:07:11,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:12,163 INFO L124 PetriNetUnfolderBase]: 1564/2379 cut-off events. [2024-06-27 23:07:12,164 INFO L125 PetriNetUnfolderBase]: For 470/474 co-relation queries the response was YES. [2024-06-27 23:07:12,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 2379 events. 1564/2379 cut-off events. For 470/474 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11965 event pairs, 981 based on Foata normal form. 5/2370 useless extension candidates. Maximal degree in co-relation 5394. Up to 2310 conditions per place. [2024-06-27 23:07:12,174 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 23:07:12,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 246 flow [2024-06-27 23:07:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:07:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:07:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-27 23:07:12,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-27 23:07:12,176 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 106 transitions. [2024-06-27 23:07:12,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 246 flow [2024-06-27 23:07:12,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:07:12,178 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 23:07:12,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 23:07:12,179 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 23:07:12,179 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 23:07:12,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:12,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:12,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:12,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:07:12,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:12,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1234942835, now seen corresponding path program 1 times [2024-06-27 23:07:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367505766] [2024-06-27 23:07:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367505766] [2024-06-27 23:07:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367505766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:13,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:13,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:07:13,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018913863] [2024-06-27 23:07:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:13,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:07:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:07:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:07:13,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:07:13,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:13,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:13,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:07:13,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:13,845 INFO L124 PetriNetUnfolderBase]: 1842/2780 cut-off events. [2024-06-27 23:07:13,845 INFO L125 PetriNetUnfolderBase]: For 1517/1525 co-relation queries the response was YES. [2024-06-27 23:07:13,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6983 conditions, 2780 events. 1842/2780 cut-off events. For 1517/1525 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13917 event pairs, 1070 based on Foata normal form. 7/2772 useless extension candidates. Maximal degree in co-relation 6969. Up to 2699 conditions per place. [2024-06-27 23:07:13,857 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 23:07:13,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 326 flow [2024-06-27 23:07:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:07:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:07:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 23:07:13,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2024-06-27 23:07:13,858 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 126 transitions. [2024-06-27 23:07:13,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 326 flow [2024-06-27 23:07:13,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:07:13,861 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-27 23:07:13,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 23:07:13,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-27 23:07:13,862 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-27 23:07:13,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:13,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:13,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:13,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:07:13,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:13,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:13,863 INFO L85 PathProgramCache]: Analyzing trace with hash -293456726, now seen corresponding path program 1 times [2024-06-27 23:07:13,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:13,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677855272] [2024-06-27 23:07:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:13,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:15,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677855272] [2024-06-27 23:07:15,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677855272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:15,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:15,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:07:15,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370603616] [2024-06-27 23:07:15,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:15,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:07:15,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:07:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:07:15,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:07:15,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:15,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:15,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:07:15,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:15,834 INFO L124 PetriNetUnfolderBase]: 1836/2779 cut-off events. [2024-06-27 23:07:15,835 INFO L125 PetriNetUnfolderBase]: For 2833/2841 co-relation queries the response was YES. [2024-06-27 23:07:15,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7633 conditions, 2779 events. 1836/2779 cut-off events. For 2833/2841 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13912 event pairs, 928 based on Foata normal form. 7/2779 useless extension candidates. Maximal degree in co-relation 7618. Up to 2675 conditions per place. [2024-06-27 23:07:15,850 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-27 23:07:15,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 404 flow [2024-06-27 23:07:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:07:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:07:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 23:07:15,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-27 23:07:15,852 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 149 transitions. [2024-06-27 23:07:15,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 404 flow [2024-06-27 23:07:15,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 380 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:15,855 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-27 23:07:15,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-27 23:07:15,855 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-27 23:07:15,856 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-27 23:07:15,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:15,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:15,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:07:15,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:15,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash -507223268, now seen corresponding path program 1 times [2024-06-27 23:07:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:15,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798054376] [2024-06-27 23:07:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:17,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:17,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798054376] [2024-06-27 23:07:17,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798054376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:17,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:17,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:07:17,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363430358] [2024-06-27 23:07:17,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:17,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:07:17,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:17,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:07:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:07:17,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:07:17,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:17,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:17,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:07:17,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:18,098 INFO L124 PetriNetUnfolderBase]: 2223/3359 cut-off events. [2024-06-27 23:07:18,098 INFO L125 PetriNetUnfolderBase]: For 5234/5237 co-relation queries the response was YES. [2024-06-27 23:07:18,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9827 conditions, 3359 events. 2223/3359 cut-off events. For 5234/5237 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16951 event pairs, 847 based on Foata normal form. 7/3358 useless extension candidates. Maximal degree in co-relation 9811. Up to 3145 conditions per place. [2024-06-27 23:07:18,113 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 69 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-27 23:07:18,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 556 flow [2024-06-27 23:07:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:07:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:07:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 23:07:18,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-27 23:07:18,115 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 7 states and 174 transitions. [2024-06-27 23:07:18,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 556 flow [2024-06-27 23:07:18,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 95 transitions, 522 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:07:18,119 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 285 flow [2024-06-27 23:07:18,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=285, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-27 23:07:18,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-27 23:07:18,120 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 285 flow [2024-06-27 23:07:18,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:18,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:18,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:18,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:07:18,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:18,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -456527796, now seen corresponding path program 1 times [2024-06-27 23:07:18,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:18,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137643758] [2024-06-27 23:07:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:19,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:19,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137643758] [2024-06-27 23:07:19,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137643758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:19,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:19,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:07:19,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889894833] [2024-06-27 23:07:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:19,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:07:19,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:19,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:07:19,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:07:19,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:07:19,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 285 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) [2024-06-27 23:07:19,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:19,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:07:19,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:20,046 INFO L124 PetriNetUnfolderBase]: 1812/2888 cut-off events. [2024-06-27 23:07:20,047 INFO L125 PetriNetUnfolderBase]: For 6989/7012 co-relation queries the response was YES. [2024-06-27 23:07:20,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9091 conditions, 2888 events. 1812/2888 cut-off events. For 6989/7012 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15527 event pairs, 1111 based on Foata normal form. 27/2891 useless extension candidates. Maximal degree in co-relation 9073. Up to 2665 conditions per place. [2024-06-27 23:07:20,069 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-27 23:07:20,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 507 flow [2024-06-27 23:07:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:07:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:07:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 23:07:20,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 23:07:20,070 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 285 flow. Second operand 6 states and 128 transitions. [2024-06-27 23:07:20,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 507 flow [2024-06-27 23:07:20,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 474 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:20,075 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 351 flow [2024-06-27 23:07:20,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-27 23:07:20,077 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 17 predicate places. [2024-06-27 23:07:20,078 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 351 flow [2024-06-27 23:07:20,078 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) [2024-06-27 23:07:20,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:20,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:20,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:07:20,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:20,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:20,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1417243637, now seen corresponding path program 1 times [2024-06-27 23:07:20,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:20,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96634078] [2024-06-27 23:07:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:20,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:22,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:22,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96634078] [2024-06-27 23:07:22,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96634078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:22,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:22,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:22,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298476964] [2024-06-27 23:07:22,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:22,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:22,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:22,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:22,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:22,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:07:22,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:22,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:22,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:07:22,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:22,600 INFO L124 PetriNetUnfolderBase]: 2221/3356 cut-off events. [2024-06-27 23:07:22,601 INFO L125 PetriNetUnfolderBase]: For 10405/10413 co-relation queries the response was YES. [2024-06-27 23:07:22,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11603 conditions, 3356 events. 2221/3356 cut-off events. For 10405/10413 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16880 event pairs, 654 based on Foata normal form. 16/3369 useless extension candidates. Maximal degree in co-relation 11580. Up to 3095 conditions per place. [2024-06-27 23:07:22,618 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 76 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-06-27 23:07:22,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 108 transitions, 729 flow [2024-06-27 23:07:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 23:07:22,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-27 23:07:22,620 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 351 flow. Second operand 8 states and 193 transitions. [2024-06-27 23:07:22,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 108 transitions, 729 flow [2024-06-27 23:07:22,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 108 transitions, 705 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:07:22,626 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 413 flow [2024-06-27 23:07:22,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=413, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-27 23:07:22,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-27 23:07:22,627 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 413 flow [2024-06-27 23:07:22,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:22,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:22,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:22,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:07:22,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:22,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -436562373, now seen corresponding path program 1 times [2024-06-27 23:07:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:22,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663333014] [2024-06-27 23:07:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:22,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:23,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663333014] [2024-06-27 23:07:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663333014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:07:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212377478] [2024-06-27 23:07:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:07:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:07:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:07:23,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:07:23,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 413 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) [2024-06-27 23:07:23,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:23,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:07:23,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:24,544 INFO L124 PetriNetUnfolderBase]: 2164/3341 cut-off events. [2024-06-27 23:07:24,545 INFO L125 PetriNetUnfolderBase]: For 14954/14984 co-relation queries the response was YES. [2024-06-27 23:07:24,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12386 conditions, 3341 events. 2164/3341 cut-off events. For 14954/14984 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17441 event pairs, 1139 based on Foata normal form. 29/3366 useless extension candidates. Maximal degree in co-relation 12361. Up to 3076 conditions per place. [2024-06-27 23:07:24,559 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 78 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-27 23:07:24,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 114 transitions, 885 flow [2024-06-27 23:07:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:24,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:24,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 23:07:24,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-27 23:07:24,562 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 413 flow. Second operand 8 states and 173 transitions. [2024-06-27 23:07:24,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 114 transitions, 885 flow [2024-06-27 23:07:24,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 114 transitions, 799 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 23:07:24,568 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 555 flow [2024-06-27 23:07:24,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=555, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2024-06-27 23:07:24,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2024-06-27 23:07:24,570 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 555 flow [2024-06-27 23:07:24,571 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) [2024-06-27 23:07:24,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:24,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:24,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:07:24,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:24,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2137191351, now seen corresponding path program 2 times [2024-06-27 23:07:24,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:24,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499321428] [2024-06-27 23:07:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:24,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:25,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:25,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499321428] [2024-06-27 23:07:25,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499321428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:25,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:25,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:07:25,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990167216] [2024-06-27 23:07:25,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:25,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:07:25,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:25,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:07:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:07:25,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:07:25,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 555 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) [2024-06-27 23:07:25,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:25,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:07:25,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:26,751 INFO L124 PetriNetUnfolderBase]: 2246/3468 cut-off events. [2024-06-27 23:07:26,751 INFO L125 PetriNetUnfolderBase]: For 18971/18998 co-relation queries the response was YES. [2024-06-27 23:07:26,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13858 conditions, 3468 events. 2246/3468 cut-off events. For 18971/18998 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18120 event pairs, 1150 based on Foata normal form. 30/3491 useless extension candidates. Maximal degree in co-relation 13828. Up to 3143 conditions per place. [2024-06-27 23:07:26,768 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 71 selfloop transitions, 48 changer transitions 0/126 dead transitions. [2024-06-27 23:07:26,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 126 transitions, 1107 flow [2024-06-27 23:07:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:07:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:07:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 23:07:26,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902597402597403 [2024-06-27 23:07:26,770 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 555 flow. Second operand 7 states and 151 transitions. [2024-06-27 23:07:26,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 126 transitions, 1107 flow [2024-06-27 23:07:26,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 126 transitions, 1063 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 23:07:26,781 INFO L231 Difference]: Finished difference. Result has 80 places, 103 transitions, 869 flow [2024-06-27 23:07:26,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=869, PETRI_PLACES=80, PETRI_TRANSITIONS=103} [2024-06-27 23:07:26,781 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-27 23:07:26,781 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 103 transitions, 869 flow [2024-06-27 23:07:26,782 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) [2024-06-27 23:07:26,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:26,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:26,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:07:26,782 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:26,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -636517589, now seen corresponding path program 3 times [2024-06-27 23:07:26,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:26,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925302155] [2024-06-27 23:07:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:26,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:28,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:28,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925302155] [2024-06-27 23:07:28,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925302155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:28,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:28,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:07:28,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121913026] [2024-06-27 23:07:28,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:28,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:07:28,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:07:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:07:28,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:07:28,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 103 transitions, 869 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) [2024-06-27 23:07:28,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:28,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:07:28,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:28,963 INFO L124 PetriNetUnfolderBase]: 2282/3527 cut-off events. [2024-06-27 23:07:28,963 INFO L125 PetriNetUnfolderBase]: For 23221/23245 co-relation queries the response was YES. [2024-06-27 23:07:28,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14940 conditions, 3527 events. 2282/3527 cut-off events. For 23221/23245 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18452 event pairs, 1133 based on Foata normal form. 30/3550 useless extension candidates. Maximal degree in co-relation 14905. Up to 3175 conditions per place. [2024-06-27 23:07:28,983 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 69 selfloop transitions, 61 changer transitions 0/137 dead transitions. [2024-06-27 23:07:28,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1371 flow [2024-06-27 23:07:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:07:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:07:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 23:07:28,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:07:28,985 INFO L175 Difference]: Start difference. First operand has 80 places, 103 transitions, 869 flow. Second operand 7 states and 147 transitions. [2024-06-27 23:07:28,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1371 flow [2024-06-27 23:07:28,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 1285 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-27 23:07:29,000 INFO L231 Difference]: Finished difference. Result has 86 places, 113 transitions, 1046 flow [2024-06-27 23:07:29,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1046, PETRI_PLACES=86, PETRI_TRANSITIONS=113} [2024-06-27 23:07:29,001 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-27 23:07:29,001 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 113 transitions, 1046 flow [2024-06-27 23:07:29,001 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) [2024-06-27 23:07:29,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:29,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:29,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:07:29,001 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:29,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1157274769, now seen corresponding path program 4 times [2024-06-27 23:07:29,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:29,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145387456] [2024-06-27 23:07:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:29,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145387456] [2024-06-27 23:07:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145387456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:30,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:07:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9149403] [2024-06-27 23:07:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:07:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:07:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:07:30,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:07:30,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 113 transitions, 1046 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) [2024-06-27 23:07:30,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:30,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:07:30,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:31,101 INFO L124 PetriNetUnfolderBase]: 2266/3504 cut-off events. [2024-06-27 23:07:31,101 INFO L125 PetriNetUnfolderBase]: For 26378/26402 co-relation queries the response was YES. [2024-06-27 23:07:31,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15067 conditions, 3504 events. 2266/3504 cut-off events. For 26378/26402 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18313 event pairs, 1136 based on Foata normal form. 30/3527 useless extension candidates. Maximal degree in co-relation 15029. Up to 3162 conditions per place. [2024-06-27 23:07:31,120 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 70 selfloop transitions, 58 changer transitions 0/135 dead transitions. [2024-06-27 23:07:31,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 135 transitions, 1372 flow [2024-06-27 23:07:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:07:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:07:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 23:07:31,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:07:31,122 INFO L175 Difference]: Start difference. First operand has 86 places, 113 transitions, 1046 flow. Second operand 7 states and 147 transitions. [2024-06-27 23:07:31,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 135 transitions, 1372 flow [2024-06-27 23:07:31,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 135 transitions, 1240 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 23:07:31,144 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 1041 flow [2024-06-27 23:07:31,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1041, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-06-27 23:07:31,145 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-27 23:07:31,145 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 1041 flow [2024-06-27 23:07:31,145 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) [2024-06-27 23:07:31,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:31,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:31,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:07:31,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:31,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1858660447, now seen corresponding path program 1 times [2024-06-27 23:07:31,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:31,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927134242] [2024-06-27 23:07:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:31,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:32,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927134242] [2024-06-27 23:07:32,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927134242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:32,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:32,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:07:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894256170] [2024-06-27 23:07:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:32,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:07:32,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:07:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:07:32,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:07:32,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 1041 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:32,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:32,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:07:32,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:32,594 INFO L124 PetriNetUnfolderBase]: 1957/3119 cut-off events. [2024-06-27 23:07:32,594 INFO L125 PetriNetUnfolderBase]: For 28638/28785 co-relation queries the response was YES. [2024-06-27 23:07:32,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13793 conditions, 3119 events. 1957/3119 cut-off events. For 28638/28785 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17076 event pairs, 998 based on Foata normal form. 41/3099 useless extension candidates. Maximal degree in co-relation 13753. Up to 2860 conditions per place. [2024-06-27 23:07:32,642 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 96 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2024-06-27 23:07:32,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 1299 flow [2024-06-27 23:07:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:07:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:07:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-27 23:07:32,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 23:07:32,657 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 1041 flow. Second operand 5 states and 107 transitions. [2024-06-27 23:07:32,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 1299 flow [2024-06-27 23:07:32,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 123 transitions, 1167 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:07:32,682 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 968 flow [2024-06-27 23:07:32,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=968, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-27 23:07:32,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-27 23:07:32,683 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 968 flow [2024-06-27 23:07:32,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:32,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:32,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:32,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:07:32,684 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:32,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash -835201677, now seen corresponding path program 1 times [2024-06-27 23:07:32,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:32,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481426093] [2024-06-27 23:07:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:32,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:33,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481426093] [2024-06-27 23:07:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481426093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:33,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717582197] [2024-06-27 23:07:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:33,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:33,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:33,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 968 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:33,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:33,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:33,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:34,765 INFO L124 PetriNetUnfolderBase]: 2461/3749 cut-off events. [2024-06-27 23:07:34,765 INFO L125 PetriNetUnfolderBase]: For 32493/32498 co-relation queries the response was YES. [2024-06-27 23:07:34,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16597 conditions, 3749 events. 2461/3749 cut-off events. For 32493/32498 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19227 event pairs, 1088 based on Foata normal form. 6/3751 useless extension candidates. Maximal degree in co-relation 16557. Up to 3231 conditions per place. [2024-06-27 23:07:34,785 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 96 selfloop transitions, 72 changer transitions 0/173 dead transitions. [2024-06-27 23:07:34,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 173 transitions, 1632 flow [2024-06-27 23:07:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:07:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:07:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 23:07:34,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:07:34,787 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 968 flow. Second operand 9 states and 189 transitions. [2024-06-27 23:07:34,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 173 transitions, 1632 flow [2024-06-27 23:07:34,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 173 transitions, 1599 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:34,810 INFO L231 Difference]: Finished difference. Result has 100 places, 133 transitions, 1273 flow [2024-06-27 23:07:34,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1273, PETRI_PLACES=100, PETRI_TRANSITIONS=133} [2024-06-27 23:07:34,811 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-27 23:07:34,811 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 133 transitions, 1273 flow [2024-06-27 23:07:34,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:34,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:34,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:07:34,812 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:34,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2056364671, now seen corresponding path program 2 times [2024-06-27 23:07:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:34,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311067225] [2024-06-27 23:07:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:36,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311067225] [2024-06-27 23:07:36,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311067225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:36,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:36,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:36,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586810597] [2024-06-27 23:07:36,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:36,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:36,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:36,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:36,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 133 transitions, 1273 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:36,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:36,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:36,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:37,172 INFO L124 PetriNetUnfolderBase]: 2625/4010 cut-off events. [2024-06-27 23:07:37,172 INFO L125 PetriNetUnfolderBase]: For 41318/41323 co-relation queries the response was YES. [2024-06-27 23:07:37,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19252 conditions, 4010 events. 2625/4010 cut-off events. For 41318/41323 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20757 event pairs, 1071 based on Foata normal form. 8/4014 useless extension candidates. Maximal degree in co-relation 19208. Up to 3363 conditions per place. [2024-06-27 23:07:37,198 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 107 selfloop transitions, 94 changer transitions 0/206 dead transitions. [2024-06-27 23:07:37,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 206 transitions, 2295 flow [2024-06-27 23:07:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:07:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:07:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:07:37,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 23:07:37,200 INFO L175 Difference]: Start difference. First operand has 100 places, 133 transitions, 1273 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:07:37,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 206 transitions, 2295 flow [2024-06-27 23:07:37,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 206 transitions, 2145 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:37,233 INFO L231 Difference]: Finished difference. Result has 109 places, 163 transitions, 1724 flow [2024-06-27 23:07:37,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=109, PETRI_TRANSITIONS=163} [2024-06-27 23:07:37,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-27 23:07:37,234 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 163 transitions, 1724 flow [2024-06-27 23:07:37,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:37,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:37,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:37,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:07:37,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:37,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:37,235 INFO L85 PathProgramCache]: Analyzing trace with hash -648538111, now seen corresponding path program 3 times [2024-06-27 23:07:37,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:37,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455509598] [2024-06-27 23:07:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:37,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:38,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455509598] [2024-06-27 23:07:38,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455509598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:38,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:38,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070573256] [2024-06-27 23:07:38,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:38,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:38,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 163 transitions, 1724 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:38,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:38,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:38,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:39,595 INFO L124 PetriNetUnfolderBase]: 2688/4099 cut-off events. [2024-06-27 23:07:39,595 INFO L125 PetriNetUnfolderBase]: For 47493/47502 co-relation queries the response was YES. [2024-06-27 23:07:39,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20810 conditions, 4099 events. 2688/4099 cut-off events. For 47493/47502 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21221 event pairs, 1041 based on Foata normal form. 12/4107 useless extension candidates. Maximal degree in co-relation 20761. Up to 3418 conditions per place. [2024-06-27 23:07:39,619 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 114 selfloop transitions, 102 changer transitions 0/221 dead transitions. [2024-06-27 23:07:39,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 221 transitions, 2649 flow [2024-06-27 23:07:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:07:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:07:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 23:07:39,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 23:07:39,624 INFO L175 Difference]: Start difference. First operand has 109 places, 163 transitions, 1724 flow. Second operand 9 states and 192 transitions. [2024-06-27 23:07:39,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 221 transitions, 2649 flow [2024-06-27 23:07:39,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 221 transitions, 2513 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:39,734 INFO L231 Difference]: Finished difference. Result has 116 places, 177 transitions, 2003 flow [2024-06-27 23:07:39,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2003, PETRI_PLACES=116, PETRI_TRANSITIONS=177} [2024-06-27 23:07:39,736 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-27 23:07:39,736 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 177 transitions, 2003 flow [2024-06-27 23:07:39,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:39,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:39,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:39,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:07:39,737 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:39,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -693217171, now seen corresponding path program 4 times [2024-06-27 23:07:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:39,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269774823] [2024-06-27 23:07:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:41,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:41,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269774823] [2024-06-27 23:07:41,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269774823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:41,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186951452] [2024-06-27 23:07:41,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:41,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:41,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 177 transitions, 2003 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:41,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:41,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:41,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:42,086 INFO L124 PetriNetUnfolderBase]: 2672/4078 cut-off events. [2024-06-27 23:07:42,086 INFO L125 PetriNetUnfolderBase]: For 52477/52486 co-relation queries the response was YES. [2024-06-27 23:07:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20997 conditions, 4078 events. 2672/4078 cut-off events. For 52477/52486 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21152 event pairs, 1035 based on Foata normal form. 12/4086 useless extension candidates. Maximal degree in co-relation 20946. Up to 3405 conditions per place. [2024-06-27 23:07:42,109 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 109 selfloop transitions, 105 changer transitions 0/219 dead transitions. [2024-06-27 23:07:42,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 219 transitions, 2695 flow [2024-06-27 23:07:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:07:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:07:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 23:07:42,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-27 23:07:42,126 INFO L175 Difference]: Start difference. First operand has 116 places, 177 transitions, 2003 flow. Second operand 9 states and 188 transitions. [2024-06-27 23:07:42,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 219 transitions, 2695 flow [2024-06-27 23:07:42,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 2480 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 23:07:42,220 INFO L231 Difference]: Finished difference. Result has 120 places, 177 transitions, 2010 flow [2024-06-27 23:07:42,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2010, PETRI_PLACES=120, PETRI_TRANSITIONS=177} [2024-06-27 23:07:42,221 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-27 23:07:42,221 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 177 transitions, 2010 flow [2024-06-27 23:07:42,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:42,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:42,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:42,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:07:42,222 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:42,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1822851815, now seen corresponding path program 5 times [2024-06-27 23:07:42,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:42,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016388388] [2024-06-27 23:07:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:42,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:43,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:43,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016388388] [2024-06-27 23:07:43,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016388388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:43,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:43,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:43,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588227671] [2024-06-27 23:07:43,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:43,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:43,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:43,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 177 transitions, 2010 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:43,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:43,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:43,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:44,761 INFO L124 PetriNetUnfolderBase]: 2817/4301 cut-off events. [2024-06-27 23:07:44,761 INFO L125 PetriNetUnfolderBase]: For 58383/58392 co-relation queries the response was YES. [2024-06-27 23:07:44,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 4301 events. 2817/4301 cut-off events. For 58383/58392 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22388 event pairs, 879 based on Foata normal form. 10/4295 useless extension candidates. Maximal degree in co-relation 22497. Up to 3526 conditions per place. [2024-06-27 23:07:44,784 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 97 selfloop transitions, 143 changer transitions 0/245 dead transitions. [2024-06-27 23:07:44,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 245 transitions, 3158 flow [2024-06-27 23:07:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:07:44,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:07:44,786 INFO L175 Difference]: Start difference. First operand has 120 places, 177 transitions, 2010 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:07:44,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 245 transitions, 3158 flow [2024-06-27 23:07:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 245 transitions, 2897 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 23:07:44,843 INFO L231 Difference]: Finished difference. Result has 124 places, 216 transitions, 2626 flow [2024-06-27 23:07:44,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2626, PETRI_PLACES=124, PETRI_TRANSITIONS=216} [2024-06-27 23:07:44,844 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-27 23:07:44,844 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 216 transitions, 2626 flow [2024-06-27 23:07:44,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:44,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:44,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:44,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:07:44,845 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:44,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:44,845 INFO L85 PathProgramCache]: Analyzing trace with hash -247287475, now seen corresponding path program 6 times [2024-06-27 23:07:44,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:44,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992986461] [2024-06-27 23:07:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:44,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:46,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992986461] [2024-06-27 23:07:46,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992986461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:46,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:46,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331466381] [2024-06-27 23:07:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:46,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:46,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:46,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:46,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 216 transitions, 2626 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:46,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:46,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:46,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:47,362 INFO L124 PetriNetUnfolderBase]: 2964/4518 cut-off events. [2024-06-27 23:07:47,362 INFO L125 PetriNetUnfolderBase]: For 68671/68680 co-relation queries the response was YES. [2024-06-27 23:07:47,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24866 conditions, 4518 events. 2964/4518 cut-off events. For 68671/68680 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23613 event pairs, 878 based on Foata normal form. 12/4514 useless extension candidates. Maximal degree in co-relation 24810. Up to 3651 conditions per place. [2024-06-27 23:07:47,392 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 109 selfloop transitions, 160 changer transitions 0/274 dead transitions. [2024-06-27 23:07:47,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 274 transitions, 3813 flow [2024-06-27 23:07:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 23:07:47,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 23:07:47,394 INFO L175 Difference]: Start difference. First operand has 124 places, 216 transitions, 2626 flow. Second operand 8 states and 172 transitions. [2024-06-27 23:07:47,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 274 transitions, 3813 flow [2024-06-27 23:07:47,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 274 transitions, 3607 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 23:07:47,470 INFO L231 Difference]: Finished difference. Result has 131 places, 242 transitions, 3195 flow [2024-06-27 23:07:47,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3195, PETRI_PLACES=131, PETRI_TRANSITIONS=242} [2024-06-27 23:07:47,470 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-27 23:07:47,470 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 242 transitions, 3195 flow [2024-06-27 23:07:47,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:47,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:47,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:47,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:07:47,471 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:47,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash -247280035, now seen corresponding path program 7 times [2024-06-27 23:07:47,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:47,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836841524] [2024-06-27 23:07:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:47,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:48,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836841524] [2024-06-27 23:07:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836841524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:48,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:48,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:48,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006578861] [2024-06-27 23:07:48,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:48,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:48,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:49,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:49,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 242 transitions, 3195 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:49,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:49,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:49,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:50,090 INFO L124 PetriNetUnfolderBase]: 2942/4489 cut-off events. [2024-06-27 23:07:50,090 INFO L125 PetriNetUnfolderBase]: For 74848/74857 co-relation queries the response was YES. [2024-06-27 23:07:50,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25016 conditions, 4489 events. 2942/4489 cut-off events. For 74848/74857 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23543 event pairs, 868 based on Foata normal form. 12/4485 useless extension candidates. Maximal degree in co-relation 24955. Up to 3633 conditions per place. [2024-06-27 23:07:50,136 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 105 selfloop transitions, 162 changer transitions 0/272 dead transitions. [2024-06-27 23:07:50,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 272 transitions, 3917 flow [2024-06-27 23:07:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:07:50,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:07:50,146 INFO L175 Difference]: Start difference. First operand has 131 places, 242 transitions, 3195 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:07:50,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 272 transitions, 3917 flow [2024-06-27 23:07:50,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 272 transitions, 3632 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:50,238 INFO L231 Difference]: Finished difference. Result has 136 places, 242 transitions, 3255 flow [2024-06-27 23:07:50,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3255, PETRI_PLACES=136, PETRI_TRANSITIONS=242} [2024-06-27 23:07:50,239 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-27 23:07:50,239 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 242 transitions, 3255 flow [2024-06-27 23:07:50,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:50,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:50,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:50,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:07:50,240 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:50,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:50,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1742792225, now seen corresponding path program 8 times [2024-06-27 23:07:50,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:50,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057294386] [2024-06-27 23:07:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:51,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057294386] [2024-06-27 23:07:51,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057294386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:51,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:51,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:51,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165060785] [2024-06-27 23:07:51,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:51,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:51,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:51,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:51,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:51,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 242 transitions, 3255 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:51,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:51,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:51,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:52,782 INFO L124 PetriNetUnfolderBase]: 2992/4562 cut-off events. [2024-06-27 23:07:52,783 INFO L125 PetriNetUnfolderBase]: For 82108/82114 co-relation queries the response was YES. [2024-06-27 23:07:52,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25784 conditions, 4562 events. 2992/4562 cut-off events. For 82108/82114 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23895 event pairs, 817 based on Foata normal form. 12/4561 useless extension candidates. Maximal degree in co-relation 25720. Up to 3678 conditions per place. [2024-06-27 23:07:52,815 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 98 selfloop transitions, 187 changer transitions 0/290 dead transitions. [2024-06-27 23:07:52,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 290 transitions, 4312 flow [2024-06-27 23:07:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:07:52,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 23:07:52,817 INFO L175 Difference]: Start difference. First operand has 136 places, 242 transitions, 3255 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:07:52,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 290 transitions, 4312 flow [2024-06-27 23:07:52,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 290 transitions, 4006 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 23:07:52,904 INFO L231 Difference]: Finished difference. Result has 140 places, 257 transitions, 3603 flow [2024-06-27 23:07:52,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3603, PETRI_PLACES=140, PETRI_TRANSITIONS=257} [2024-06-27 23:07:52,904 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-27 23:07:52,904 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 257 transitions, 3603 flow [2024-06-27 23:07:52,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:52,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:52,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:52,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:07:52,905 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:52,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1946744451, now seen corresponding path program 9 times [2024-06-27 23:07:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:52,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98373980] [2024-06-27 23:07:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:52,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:54,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98373980] [2024-06-27 23:07:54,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98373980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:54,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:54,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:54,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035325028] [2024-06-27 23:07:54,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:54,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:54,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:54,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 257 transitions, 3603 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:54,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:54,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:54,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:55,358 INFO L124 PetriNetUnfolderBase]: 3042/4641 cut-off events. [2024-06-27 23:07:55,359 INFO L125 PetriNetUnfolderBase]: For 90489/90495 co-relation queries the response was YES. [2024-06-27 23:07:55,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26692 conditions, 4641 events. 3042/4641 cut-off events. For 90489/90495 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24420 event pairs, 848 based on Foata normal form. 12/4639 useless extension candidates. Maximal degree in co-relation 26625. Up to 3723 conditions per place. [2024-06-27 23:07:55,388 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 110 selfloop transitions, 184 changer transitions 0/299 dead transitions. [2024-06-27 23:07:55,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 299 transitions, 4582 flow [2024-06-27 23:07:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 23:07:55,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 23:07:55,390 INFO L175 Difference]: Start difference. First operand has 140 places, 257 transitions, 3603 flow. Second operand 8 states and 166 transitions. [2024-06-27 23:07:55,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 299 transitions, 4582 flow [2024-06-27 23:07:55,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 299 transitions, 4332 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:55,495 INFO L231 Difference]: Finished difference. Result has 145 places, 266 transitions, 3903 flow [2024-06-27 23:07:55,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3903, PETRI_PLACES=145, PETRI_TRANSITIONS=266} [2024-06-27 23:07:55,496 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-27 23:07:55,496 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 266 transitions, 3903 flow [2024-06-27 23:07:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:55,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:55,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:55,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:07:55,498 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:55,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2029505255, now seen corresponding path program 10 times [2024-06-27 23:07:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:55,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940044069] [2024-06-27 23:07:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:55,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:56,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940044069] [2024-06-27 23:07:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940044069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:56,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:56,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:56,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031106139] [2024-06-27 23:07:56,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:07:56,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:07:56,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 266 transitions, 3903 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:56,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:56,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:07:56,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:57,797 INFO L124 PetriNetUnfolderBase]: 3020/4611 cut-off events. [2024-06-27 23:07:57,798 INFO L125 PetriNetUnfolderBase]: For 97439/97445 co-relation queries the response was YES. [2024-06-27 23:07:57,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26610 conditions, 4611 events. 3020/4611 cut-off events. For 97439/97445 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24230 event pairs, 844 based on Foata normal form. 12/4609 useless extension candidates. Maximal degree in co-relation 26540. Up to 3705 conditions per place. [2024-06-27 23:07:57,832 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 103 selfloop transitions, 187 changer transitions 0/295 dead transitions. [2024-06-27 23:07:57,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 295 transitions, 4607 flow [2024-06-27 23:07:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:07:57,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 23:07:57,834 INFO L175 Difference]: Start difference. First operand has 145 places, 266 transitions, 3903 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:07:57,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 295 transitions, 4607 flow [2024-06-27 23:07:57,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 295 transitions, 4281 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-27 23:07:57,982 INFO L231 Difference]: Finished difference. Result has 150 places, 266 transitions, 3967 flow [2024-06-27 23:07:57,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3967, PETRI_PLACES=150, PETRI_TRANSITIONS=266} [2024-06-27 23:07:57,982 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-27 23:07:57,983 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 266 transitions, 3967 flow [2024-06-27 23:07:57,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:07:57,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:57,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:07:57,983 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:57,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1506243084, now seen corresponding path program 1 times [2024-06-27 23:07:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:57,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419295092] [2024-06-27 23:07:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419295092] [2024-06-27 23:07:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419295092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:59,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:59,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:07:59,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333880874] [2024-06-27 23:07:59,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:59,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:07:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:07:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:08:00,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:08:00,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 266 transitions, 3967 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) [2024-06-27 23:08:00,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:00,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:08:00,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:00,915 INFO L124 PetriNetUnfolderBase]: 2794/4395 cut-off events. [2024-06-27 23:08:00,916 INFO L125 PetriNetUnfolderBase]: For 101268/101268 co-relation queries the response was YES. [2024-06-27 23:08:00,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25098 conditions, 4395 events. 2794/4395 cut-off events. For 101268/101268 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24286 event pairs, 1314 based on Foata normal form. 4/4395 useless extension candidates. Maximal degree in co-relation 25025. Up to 3942 conditions per place. [2024-06-27 23:08:00,951 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 217 selfloop transitions, 18 changer transitions 0/294 dead transitions. [2024-06-27 23:08:00,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 294 transitions, 4580 flow [2024-06-27 23:08:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:08:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:08:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 23:08:00,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 23:08:00,953 INFO L175 Difference]: Start difference. First operand has 150 places, 266 transitions, 3967 flow. Second operand 8 states and 157 transitions. [2024-06-27 23:08:00,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 294 transitions, 4580 flow [2024-06-27 23:08:01,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 294 transitions, 4245 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:01,084 INFO L231 Difference]: Finished difference. Result has 154 places, 271 transitions, 3750 flow [2024-06-27 23:08:01,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3750, PETRI_PLACES=154, PETRI_TRANSITIONS=271} [2024-06-27 23:08:01,085 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 23:08:01,085 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 271 transitions, 3750 flow [2024-06-27 23:08:01,085 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) [2024-06-27 23:08:01,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:01,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:01,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:08:01,085 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:01,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:01,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1783897120, now seen corresponding path program 1 times [2024-06-27 23:08:01,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:01,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184488637] [2024-06-27 23:08:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:01,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184488637] [2024-06-27 23:08:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184488637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:08:02,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555441865] [2024-06-27 23:08:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:02,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:08:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:08:02,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:08:03,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:08:03,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 271 transitions, 3750 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:03,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:03,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:08:03,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:03,695 INFO L124 PetriNetUnfolderBase]: 2440/3951 cut-off events. [2024-06-27 23:08:03,696 INFO L125 PetriNetUnfolderBase]: For 98807/98938 co-relation queries the response was YES. [2024-06-27 23:08:03,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22965 conditions, 3951 events. 2440/3951 cut-off events. For 98807/98938 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22565 event pairs, 1059 based on Foata normal form. 25/3901 useless extension candidates. Maximal degree in co-relation 22889. Up to 3433 conditions per place. [2024-06-27 23:08:03,725 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 194 selfloop transitions, 15 changer transitions 0/282 dead transitions. [2024-06-27 23:08:03,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 282 transitions, 4220 flow [2024-06-27 23:08:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:08:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:08:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 23:08:03,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-27 23:08:03,727 INFO L175 Difference]: Start difference. First operand has 154 places, 271 transitions, 3750 flow. Second operand 7 states and 137 transitions. [2024-06-27 23:08:03,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 282 transitions, 4220 flow [2024-06-27 23:08:03,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 282 transitions, 4035 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 23:08:03,955 INFO L231 Difference]: Finished difference. Result has 154 places, 274 transitions, 3635 flow [2024-06-27 23:08:03,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3635, PETRI_PLACES=154, PETRI_TRANSITIONS=274} [2024-06-27 23:08:03,956 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 23:08:03,956 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 274 transitions, 3635 flow [2024-06-27 23:08:03,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:03,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:03,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:03,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:08:03,957 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:03,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1785545416, now seen corresponding path program 1 times [2024-06-27 23:08:03,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:03,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449853500] [2024-06-27 23:08:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:03,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:04,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:04,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449853500] [2024-06-27 23:08:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449853500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:04,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738286301] [2024-06-27 23:08:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:04,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:04,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:05,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:05,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 274 transitions, 3635 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:05,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:05,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:05,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:06,169 INFO L124 PetriNetUnfolderBase]: 3056/4674 cut-off events. [2024-06-27 23:08:06,169 INFO L125 PetriNetUnfolderBase]: For 111919/111929 co-relation queries the response was YES. [2024-06-27 23:08:06,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27484 conditions, 4674 events. 3056/4674 cut-off events. For 111919/111929 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24804 event pairs, 1140 based on Foata normal form. 12/4684 useless extension candidates. Maximal degree in co-relation 27409. Up to 4321 conditions per place. [2024-06-27 23:08:06,204 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 286 selfloop transitions, 68 changer transitions 0/359 dead transitions. [2024-06-27 23:08:06,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 359 transitions, 4911 flow [2024-06-27 23:08:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 23:08:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 23:08:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 267 transitions. [2024-06-27 23:08:06,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43344155844155846 [2024-06-27 23:08:06,208 INFO L175 Difference]: Start difference. First operand has 154 places, 274 transitions, 3635 flow. Second operand 14 states and 267 transitions. [2024-06-27 23:08:06,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 359 transitions, 4911 flow [2024-06-27 23:08:06,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 359 transitions, 4865 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:06,348 INFO L231 Difference]: Finished difference. Result has 168 places, 303 transitions, 4066 flow [2024-06-27 23:08:06,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4066, PETRI_PLACES=168, PETRI_TRANSITIONS=303} [2024-06-27 23:08:06,348 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-27 23:08:06,349 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 303 transitions, 4066 flow [2024-06-27 23:08:06,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:06,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:06,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:08:06,349 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:06,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:06,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1433221792, now seen corresponding path program 1 times [2024-06-27 23:08:06,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:06,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531689136] [2024-06-27 23:08:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:06,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:07,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:07,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531689136] [2024-06-27 23:08:07,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531689136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:07,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:07,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:07,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465843899] [2024-06-27 23:08:07,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:07,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:07,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:07,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:07,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 303 transitions, 4066 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:07,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:07,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:07,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:08,580 INFO L124 PetriNetUnfolderBase]: 3105/4757 cut-off events. [2024-06-27 23:08:08,581 INFO L125 PetriNetUnfolderBase]: For 129334/129343 co-relation queries the response was YES. [2024-06-27 23:08:08,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28950 conditions, 4757 events. 3105/4757 cut-off events. For 129334/129343 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25394 event pairs, 1038 based on Foata normal form. 10/4764 useless extension candidates. Maximal degree in co-relation 28869. Up to 3436 conditions per place. [2024-06-27 23:08:08,618 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 142 selfloop transitions, 213 changer transitions 0/360 dead transitions. [2024-06-27 23:08:08,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 360 transitions, 5247 flow [2024-06-27 23:08:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:08:08,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 23:08:08,621 INFO L175 Difference]: Start difference. First operand has 168 places, 303 transitions, 4066 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:08:08,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 360 transitions, 5247 flow [2024-06-27 23:08:08,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 360 transitions, 5077 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-27 23:08:08,844 INFO L231 Difference]: Finished difference. Result has 175 places, 315 transitions, 4532 flow [2024-06-27 23:08:08,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4532, PETRI_PLACES=175, PETRI_TRANSITIONS=315} [2024-06-27 23:08:08,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-27 23:08:08,845 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 315 transitions, 4532 flow [2024-06-27 23:08:08,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:08,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:08,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:08,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:08:08,846 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:08,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1387819936, now seen corresponding path program 2 times [2024-06-27 23:08:08,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:08,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080416898] [2024-06-27 23:08:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:08,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:09,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080416898] [2024-06-27 23:08:09,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080416898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:09,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:09,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:09,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722566472] [2024-06-27 23:08:09,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:09,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:09,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:09,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:09,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 315 transitions, 4532 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:09,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:09,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:09,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:10,956 INFO L124 PetriNetUnfolderBase]: 3149/4831 cut-off events. [2024-06-27 23:08:10,957 INFO L125 PetriNetUnfolderBase]: For 141958/141964 co-relation queries the response was YES. [2024-06-27 23:08:10,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30639 conditions, 4831 events. 3149/4831 cut-off events. For 141958/141964 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25942 event pairs, 1142 based on Foata normal form. 9/4838 useless extension candidates. Maximal degree in co-relation 30557. Up to 4464 conditions per place. [2024-06-27 23:08:11,000 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 300 selfloop transitions, 65 changer transitions 0/370 dead transitions. [2024-06-27 23:08:11,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 370 transitions, 5575 flow [2024-06-27 23:08:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:08:11,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 23:08:11,007 INFO L175 Difference]: Start difference. First operand has 175 places, 315 transitions, 4532 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:08:11,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 370 transitions, 5575 flow [2024-06-27 23:08:11,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 370 transitions, 5296 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:11,232 INFO L231 Difference]: Finished difference. Result has 181 places, 331 transitions, 4579 flow [2024-06-27 23:08:11,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4261, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4579, PETRI_PLACES=181, PETRI_TRANSITIONS=331} [2024-06-27 23:08:11,233 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-27 23:08:11,233 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 331 transitions, 4579 flow [2024-06-27 23:08:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:11,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:11,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:11,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:08:11,233 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:11,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -269223432, now seen corresponding path program 3 times [2024-06-27 23:08:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065490973] [2024-06-27 23:08:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:12,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:12,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065490973] [2024-06-27 23:08:12,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065490973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:12,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:12,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:12,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139483504] [2024-06-27 23:08:12,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:12,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:12,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:12,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:12,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:12,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 331 transitions, 4579 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:12,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:12,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:12,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:13,884 INFO L124 PetriNetUnfolderBase]: 3226/4949 cut-off events. [2024-06-27 23:08:13,884 INFO L125 PetriNetUnfolderBase]: For 146491/146495 co-relation queries the response was YES. [2024-06-27 23:08:13,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31674 conditions, 4949 events. 3226/4949 cut-off events. For 146491/146495 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26710 event pairs, 1132 based on Foata normal form. 7/4954 useless extension candidates. Maximal degree in co-relation 31589. Up to 4546 conditions per place. [2024-06-27 23:08:13,919 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 311 selfloop transitions, 81 changer transitions 0/397 dead transitions. [2024-06-27 23:08:13,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 397 transitions, 5852 flow [2024-06-27 23:08:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:08:13,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 23:08:13,921 INFO L175 Difference]: Start difference. First operand has 181 places, 331 transitions, 4579 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:08:13,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 397 transitions, 5852 flow [2024-06-27 23:08:14,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 397 transitions, 5719 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:14,150 INFO L231 Difference]: Finished difference. Result has 188 places, 362 transitions, 5047 flow [2024-06-27 23:08:14,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5047, PETRI_PLACES=188, PETRI_TRANSITIONS=362} [2024-06-27 23:08:14,151 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-27 23:08:14,151 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 362 transitions, 5047 flow [2024-06-27 23:08:14,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:14,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:14,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:14,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:08:14,152 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:14,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash -265546026, now seen corresponding path program 2 times [2024-06-27 23:08:14,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:14,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425942647] [2024-06-27 23:08:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:14,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:15,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:15,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425942647] [2024-06-27 23:08:15,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425942647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:15,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:15,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:15,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27962078] [2024-06-27 23:08:15,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:15,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:15,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:15,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 362 transitions, 5047 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:15,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:15,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:15,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:16,641 INFO L124 PetriNetUnfolderBase]: 3371/5186 cut-off events. [2024-06-27 23:08:16,641 INFO L125 PetriNetUnfolderBase]: For 161145/161154 co-relation queries the response was YES. [2024-06-27 23:08:16,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33403 conditions, 5186 events. 3371/5186 cut-off events. For 161145/161154 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28346 event pairs, 1048 based on Foata normal form. 12/5195 useless extension candidates. Maximal degree in co-relation 33315. Up to 3716 conditions per place. [2024-06-27 23:08:16,685 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 217 selfloop transitions, 219 changer transitions 0/441 dead transitions. [2024-06-27 23:08:16,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 441 transitions, 6733 flow [2024-06-27 23:08:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 23:08:16,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 23:08:16,687 INFO L175 Difference]: Start difference. First operand has 188 places, 362 transitions, 5047 flow. Second operand 10 states and 214 transitions. [2024-06-27 23:08:16,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 441 transitions, 6733 flow [2024-06-27 23:08:16,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 441 transitions, 6645 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 23:08:16,958 INFO L231 Difference]: Finished difference. Result has 197 places, 390 transitions, 5791 flow [2024-06-27 23:08:16,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5791, PETRI_PLACES=197, PETRI_TRANSITIONS=390} [2024-06-27 23:08:16,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-27 23:08:16,960 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 390 transitions, 5791 flow [2024-06-27 23:08:16,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:16,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:16,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:16,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:08:16,961 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:16,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -122924016, now seen corresponding path program 3 times [2024-06-27 23:08:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:16,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337107117] [2024-06-27 23:08:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:18,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:18,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337107117] [2024-06-27 23:08:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337107117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:18,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:18,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834757435] [2024-06-27 23:08:18,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:18,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:18,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:18,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:18,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:18,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 390 transitions, 5791 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:18,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:18,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:18,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:19,467 INFO L124 PetriNetUnfolderBase]: 3434/5271 cut-off events. [2024-06-27 23:08:19,467 INFO L125 PetriNetUnfolderBase]: For 176069/176078 co-relation queries the response was YES. [2024-06-27 23:08:19,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35295 conditions, 5271 events. 3434/5271 cut-off events. For 176069/176078 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28801 event pairs, 1006 based on Foata normal form. 12/5280 useless extension candidates. Maximal degree in co-relation 35204. Up to 3771 conditions per place. [2024-06-27 23:08:19,519 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 232 selfloop transitions, 216 changer transitions 0/453 dead transitions. [2024-06-27 23:08:19,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 453 transitions, 7394 flow [2024-06-27 23:08:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 23:08:19,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 23:08:19,521 INFO L175 Difference]: Start difference. First operand has 197 places, 390 transitions, 5791 flow. Second operand 10 states and 215 transitions. [2024-06-27 23:08:19,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 453 transitions, 7394 flow [2024-06-27 23:08:19,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 453 transitions, 7109 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:19,843 INFO L231 Difference]: Finished difference. Result has 203 places, 402 transitions, 6125 flow [2024-06-27 23:08:19,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5517, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6125, PETRI_PLACES=203, PETRI_TRANSITIONS=402} [2024-06-27 23:08:19,844 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-27 23:08:19,844 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 402 transitions, 6125 flow [2024-06-27 23:08:19,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:19,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:19,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:19,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:08:19,845 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:19,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1525179876, now seen corresponding path program 4 times [2024-06-27 23:08:19,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:19,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545703849] [2024-06-27 23:08:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:19,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:21,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:21,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545703849] [2024-06-27 23:08:21,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545703849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:21,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:21,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:21,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725977622] [2024-06-27 23:08:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:21,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:21,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:21,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:21,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 402 transitions, 6125 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:21,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:21,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:21,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:22,532 INFO L124 PetriNetUnfolderBase]: 3418/5250 cut-off events. [2024-06-27 23:08:22,533 INFO L125 PetriNetUnfolderBase]: For 184834/184843 co-relation queries the response was YES. [2024-06-27 23:08:22,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35470 conditions, 5250 events. 3418/5250 cut-off events. For 184834/184843 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28735 event pairs, 1000 based on Foata normal form. 12/5259 useless extension candidates. Maximal degree in co-relation 35378. Up to 3758 conditions per place. [2024-06-27 23:08:22,576 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 227 selfloop transitions, 219 changer transitions 0/451 dead transitions. [2024-06-27 23:08:22,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 451 transitions, 7465 flow [2024-06-27 23:08:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 23:08:22,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 23:08:22,578 INFO L175 Difference]: Start difference. First operand has 203 places, 402 transitions, 6125 flow. Second operand 10 states and 211 transitions. [2024-06-27 23:08:22,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 451 transitions, 7465 flow [2024-06-27 23:08:22,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 451 transitions, 7033 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 23:08:22,884 INFO L231 Difference]: Finished difference. Result has 207 places, 402 transitions, 6144 flow [2024-06-27 23:08:22,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6144, PETRI_PLACES=207, PETRI_TRANSITIONS=402} [2024-06-27 23:08:22,885 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-27 23:08:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 402 transitions, 6144 flow [2024-06-27 23:08:22,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:22,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:22,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:22,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:08:22,886 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:22,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 672437378, now seen corresponding path program 4 times [2024-06-27 23:08:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843423947] [2024-06-27 23:08:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:24,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:24,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843423947] [2024-06-27 23:08:24,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843423947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:24,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129024701] [2024-06-27 23:08:24,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:24,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:24,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:24,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:24,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 402 transitions, 6144 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:24,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:24,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:24,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:25,656 INFO L124 PetriNetUnfolderBase]: 3516/5405 cut-off events. [2024-06-27 23:08:25,657 INFO L125 PetriNetUnfolderBase]: For 193437/193439 co-relation queries the response was YES. [2024-06-27 23:08:25,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36680 conditions, 5405 events. 3516/5405 cut-off events. For 193437/193439 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29638 event pairs, 903 based on Foata normal form. 5/5408 useless extension candidates. Maximal degree in co-relation 36587. Up to 4927 conditions per place. [2024-06-27 23:08:25,710 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 366 selfloop transitions, 102 changer transitions 0/473 dead transitions. [2024-06-27 23:08:25,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 473 transitions, 7703 flow [2024-06-27 23:08:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:08:25,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 23:08:25,711 INFO L175 Difference]: Start difference. First operand has 207 places, 402 transitions, 6144 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:08:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 473 transitions, 7703 flow [2024-06-27 23:08:26,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 473 transitions, 7274 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:08:26,051 INFO L231 Difference]: Finished difference. Result has 212 places, 441 transitions, 6526 flow [2024-06-27 23:08:26,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6526, PETRI_PLACES=212, PETRI_TRANSITIONS=441} [2024-06-27 23:08:26,051 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-27 23:08:26,052 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 441 transitions, 6526 flow [2024-06-27 23:08:26,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:26,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:26,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:26,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:08:26,052 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:26,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash 672557534, now seen corresponding path program 5 times [2024-06-27 23:08:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:26,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375594794] [2024-06-27 23:08:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:26,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:27,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:27,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375594794] [2024-06-27 23:08:27,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375594794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:27,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:27,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482919790] [2024-06-27 23:08:27,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:27,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:27,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:27,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:27,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 441 transitions, 6526 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:27,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:27,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:27,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:28,878 INFO L124 PetriNetUnfolderBase]: 3744/5741 cut-off events. [2024-06-27 23:08:28,878 INFO L125 PetriNetUnfolderBase]: For 210062/210071 co-relation queries the response was YES. [2024-06-27 23:08:28,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38667 conditions, 5741 events. 3744/5741 cut-off events. For 210062/210071 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31819 event pairs, 902 based on Foata normal form. 12/5750 useless extension candidates. Maximal degree in co-relation 38571. Up to 4071 conditions per place. [2024-06-27 23:08:28,926 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 256 selfloop transitions, 279 changer transitions 0/540 dead transitions. [2024-06-27 23:08:28,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 540 transitions, 8759 flow [2024-06-27 23:08:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 23:08:28,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 23:08:28,932 INFO L175 Difference]: Start difference. First operand has 212 places, 441 transitions, 6526 flow. Second operand 10 states and 214 transitions. [2024-06-27 23:08:28,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 540 transitions, 8759 flow [2024-06-27 23:08:29,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 540 transitions, 8649 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 23:08:29,276 INFO L231 Difference]: Finished difference. Result has 221 places, 488 transitions, 7615 flow [2024-06-27 23:08:29,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7615, PETRI_PLACES=221, PETRI_TRANSITIONS=488} [2024-06-27 23:08:29,277 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-27 23:08:29,277 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 488 transitions, 7615 flow [2024-06-27 23:08:29,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:29,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:29,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:29,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:08:29,278 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:29,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:29,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1697021548, now seen corresponding path program 6 times [2024-06-27 23:08:29,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:29,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846526477] [2024-06-27 23:08:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:29,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846526477] [2024-06-27 23:08:30,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846526477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:30,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:30,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:30,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116680296] [2024-06-27 23:08:30,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:30,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:30,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:30,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:30,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:30,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:30,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 488 transitions, 7615 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:30,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:30,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:30,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:32,489 INFO L124 PetriNetUnfolderBase]: 3891/5958 cut-off events. [2024-06-27 23:08:32,490 INFO L125 PetriNetUnfolderBase]: For 233841/233850 co-relation queries the response was YES. [2024-06-27 23:08:32,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41725 conditions, 5958 events. 3891/5958 cut-off events. For 233841/233850 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33186 event pairs, 901 based on Foata normal form. 14/5969 useless extension candidates. Maximal degree in co-relation 41626. Up to 4196 conditions per place. [2024-06-27 23:08:32,550 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 278 selfloop transitions, 286 changer transitions 0/569 dead transitions. [2024-06-27 23:08:32,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 569 transitions, 9912 flow [2024-06-27 23:08:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 23:08:32,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-27 23:08:32,552 INFO L175 Difference]: Start difference. First operand has 221 places, 488 transitions, 7615 flow. Second operand 10 states and 218 transitions. [2024-06-27 23:08:32,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 569 transitions, 9912 flow [2024-06-27 23:08:32,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 569 transitions, 9515 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:32,953 INFO L231 Difference]: Finished difference. Result has 227 places, 514 transitions, 8234 flow [2024-06-27 23:08:32,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7242, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8234, PETRI_PLACES=227, PETRI_TRANSITIONS=514} [2024-06-27 23:08:32,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-27 23:08:32,954 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 514 transitions, 8234 flow [2024-06-27 23:08:32,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:32,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:32,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:32,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:08:32,954 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:32,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:32,955 INFO L85 PathProgramCache]: Analyzing trace with hash 677205674, now seen corresponding path program 7 times [2024-06-27 23:08:32,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:32,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627726742] [2024-06-27 23:08:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:32,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:34,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627726742] [2024-06-27 23:08:34,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627726742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:34,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:34,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:34,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959656574] [2024-06-27 23:08:34,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:34,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:34,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 514 transitions, 8234 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:34,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:34,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:34,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:36,026 INFO L124 PetriNetUnfolderBase]: 3869/5929 cut-off events. [2024-06-27 23:08:36,026 INFO L125 PetriNetUnfolderBase]: For 244294/244303 co-relation queries the response was YES. [2024-06-27 23:08:36,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41754 conditions, 5929 events. 3869/5929 cut-off events. For 244294/244303 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33066 event pairs, 891 based on Foata normal form. 14/5940 useless extension candidates. Maximal degree in co-relation 41654. Up to 4178 conditions per place. [2024-06-27 23:08:36,094 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 274 selfloop transitions, 288 changer transitions 0/567 dead transitions. [2024-06-27 23:08:36,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 567 transitions, 10025 flow [2024-06-27 23:08:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 23:08:36,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 23:08:36,096 INFO L175 Difference]: Start difference. First operand has 227 places, 514 transitions, 8234 flow. Second operand 10 states and 214 transitions. [2024-06-27 23:08:36,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 567 transitions, 10025 flow [2024-06-27 23:08:36,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 567 transitions, 9491 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:36,606 INFO L231 Difference]: Finished difference. Result has 232 places, 514 transitions, 8296 flow [2024-06-27 23:08:36,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7700, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8296, PETRI_PLACES=232, PETRI_TRANSITIONS=514} [2024-06-27 23:08:36,607 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-27 23:08:36,607 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 514 transitions, 8296 flow [2024-06-27 23:08:36,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:36,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:36,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:36,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:08:36,607 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:36,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1370386714, now seen corresponding path program 8 times [2024-06-27 23:08:36,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:36,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097480542] [2024-06-27 23:08:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:36,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:38,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:38,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097480542] [2024-06-27 23:08:38,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097480542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:38,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:38,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:38,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343528613] [2024-06-27 23:08:38,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:38,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:38,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:38,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:38,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:38,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:38,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 514 transitions, 8296 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:38,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:38,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:38,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:39,535 INFO L124 PetriNetUnfolderBase]: 3946/6036 cut-off events. [2024-06-27 23:08:39,535 INFO L125 PetriNetUnfolderBase]: For 258342/258351 co-relation queries the response was YES. [2024-06-27 23:08:39,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42799 conditions, 6036 events. 3946/6036 cut-off events. For 258342/258351 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33656 event pairs, 837 based on Foata normal form. 14/6047 useless extension candidates. Maximal degree in co-relation 42698. Up to 4246 conditions per place. [2024-06-27 23:08:39,695 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 265 selfloop transitions, 310 changer transitions 0/580 dead transitions. [2024-06-27 23:08:39,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 580 transitions, 10356 flow [2024-06-27 23:08:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:08:39,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 23:08:39,697 INFO L175 Difference]: Start difference. First operand has 232 places, 514 transitions, 8296 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:08:39,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 580 transitions, 10356 flow [2024-06-27 23:08:40,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 580 transitions, 9866 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 23:08:40,193 INFO L231 Difference]: Finished difference. Result has 237 places, 529 transitions, 8781 flow [2024-06-27 23:08:40,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7820, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8781, PETRI_PLACES=237, PETRI_TRANSITIONS=529} [2024-06-27 23:08:40,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-27 23:08:40,194 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 529 transitions, 8781 flow [2024-06-27 23:08:40,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:40,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:40,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:40,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:08:40,195 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:40,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:40,196 INFO L85 PathProgramCache]: Analyzing trace with hash -15125426, now seen corresponding path program 9 times [2024-06-27 23:08:40,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:40,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144478858] [2024-06-27 23:08:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144478858] [2024-06-27 23:08:41,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144478858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:41,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:41,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:41,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208770945] [2024-06-27 23:08:41,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:41,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:41,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:41,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 529 transitions, 8781 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:41,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:41,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:41,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:43,223 INFO L124 PetriNetUnfolderBase]: 3996/6114 cut-off events. [2024-06-27 23:08:43,223 INFO L125 PetriNetUnfolderBase]: For 274632/274641 co-relation queries the response was YES. [2024-06-27 23:08:43,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43951 conditions, 6114 events. 3996/6114 cut-off events. For 274632/274641 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34127 event pairs, 868 based on Foata normal form. 14/6125 useless extension candidates. Maximal degree in co-relation 43848. Up to 4291 conditions per place. [2024-06-27 23:08:43,283 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 279 selfloop transitions, 305 changer transitions 0/589 dead transitions. [2024-06-27 23:08:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 589 transitions, 10772 flow [2024-06-27 23:08:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 23:08:43,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 23:08:43,285 INFO L175 Difference]: Start difference. First operand has 237 places, 529 transitions, 8781 flow. Second operand 10 states and 215 transitions. [2024-06-27 23:08:43,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 589 transitions, 10772 flow [2024-06-27 23:08:43,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 589 transitions, 10305 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 23:08:43,771 INFO L231 Difference]: Finished difference. Result has 241 places, 538 transitions, 9111 flow [2024-06-27 23:08:43,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8335, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9111, PETRI_PLACES=241, PETRI_TRANSITIONS=538} [2024-06-27 23:08:43,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-27 23:08:43,772 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 538 transitions, 9111 flow [2024-06-27 23:08:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:43,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:43,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:43,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:08:43,773 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:43,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash 849689054, now seen corresponding path program 10 times [2024-06-27 23:08:43,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:43,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737549388] [2024-06-27 23:08:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:43,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737549388] [2024-06-27 23:08:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737549388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:45,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:45,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:45,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849705656] [2024-06-27 23:08:45,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:45,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:45,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 538 transitions, 9111 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:45,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:46,756 INFO L124 PetriNetUnfolderBase]: 3974/6084 cut-off events. [2024-06-27 23:08:46,757 INFO L125 PetriNetUnfolderBase]: For 283968/283977 co-relation queries the response was YES. [2024-06-27 23:08:46,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43741 conditions, 6084 events. 3974/6084 cut-off events. For 283968/283977 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33997 event pairs, 864 based on Foata normal form. 14/6095 useless extension candidates. Maximal degree in co-relation 43637. Up to 4273 conditions per place. [2024-06-27 23:08:46,819 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 271 selfloop transitions, 309 changer transitions 0/585 dead transitions. [2024-06-27 23:08:46,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 585 transitions, 10756 flow [2024-06-27 23:08:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:08:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:08:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:08:46,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 23:08:46,821 INFO L175 Difference]: Start difference. First operand has 241 places, 538 transitions, 9111 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:08:46,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 585 transitions, 10756 flow [2024-06-27 23:08:47,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 585 transitions, 9959 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 23:08:47,422 INFO L231 Difference]: Finished difference. Result has 244 places, 538 transitions, 8946 flow [2024-06-27 23:08:47,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8946, PETRI_PLACES=244, PETRI_TRANSITIONS=538} [2024-06-27 23:08:47,422 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-27 23:08:47,423 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 538 transitions, 8946 flow [2024-06-27 23:08:47,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:47,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:47,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:47,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:08:47,423 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:47,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 148241872, now seen corresponding path program 1 times [2024-06-27 23:08:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:47,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358774981] [2024-06-27 23:08:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:48,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:48,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358774981] [2024-06-27 23:08:48,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358774981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:48,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:48,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:08:48,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900852128] [2024-06-27 23:08:48,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:08:48,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:08:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:08:48,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:08:48,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 538 transitions, 8946 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:48,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:48,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:08:48,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:49,462 INFO L124 PetriNetUnfolderBase]: 3601/5623 cut-off events. [2024-06-27 23:08:49,463 INFO L125 PetriNetUnfolderBase]: For 314054/314288 co-relation queries the response was YES. [2024-06-27 23:08:49,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41628 conditions, 5623 events. 3601/5623 cut-off events. For 314054/314288 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32455 event pairs, 1154 based on Foata normal form. 129/5607 useless extension candidates. Maximal degree in co-relation 41523. Up to 4969 conditions per place. [2024-06-27 23:08:49,522 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 433 selfloop transitions, 39 changer transitions 0/561 dead transitions. [2024-06-27 23:08:49,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 561 transitions, 10031 flow [2024-06-27 23:08:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:08:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:08:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 23:08:49,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 23:08:49,523 INFO L175 Difference]: Start difference. First operand has 244 places, 538 transitions, 8946 flow. Second operand 7 states and 144 transitions. [2024-06-27 23:08:49,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 561 transitions, 10031 flow [2024-06-27 23:08:50,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 561 transitions, 9434 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 23:08:50,029 INFO L231 Difference]: Finished difference. Result has 244 places, 544 transitions, 8536 flow [2024-06-27 23:08:50,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8351, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8536, PETRI_PLACES=244, PETRI_TRANSITIONS=544} [2024-06-27 23:08:50,029 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-27 23:08:50,029 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 544 transitions, 8536 flow [2024-06-27 23:08:50,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:50,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:50,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:50,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:08:50,030 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:50,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash 669064156, now seen corresponding path program 5 times [2024-06-27 23:08:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:50,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78363624] [2024-06-27 23:08:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:50,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:51,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:51,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78363624] [2024-06-27 23:08:51,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78363624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:51,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:51,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:51,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172952499] [2024-06-27 23:08:51,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:51,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:51,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:51,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:51,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 544 transitions, 8536 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:51,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:51,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:51,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:53,276 INFO L124 PetriNetUnfolderBase]: 4053/6228 cut-off events. [2024-06-27 23:08:53,277 INFO L125 PetriNetUnfolderBase]: For 290881/290890 co-relation queries the response was YES. [2024-06-27 23:08:53,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44085 conditions, 6228 events. 4053/6228 cut-off events. For 290881/290890 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35074 event pairs, 1005 based on Foata normal form. 3/6212 useless extension candidates. Maximal degree in co-relation 43978. Up to 5670 conditions per place. [2024-06-27 23:08:53,348 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 475 selfloop transitions, 121 changer transitions 0/601 dead transitions. [2024-06-27 23:08:53,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 601 transitions, 10303 flow [2024-06-27 23:08:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:08:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:08:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:08:53,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-27 23:08:53,350 INFO L175 Difference]: Start difference. First operand has 244 places, 544 transitions, 8536 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:08:53,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 601 transitions, 10303 flow [2024-06-27 23:08:54,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 601 transitions, 10032 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 23:08:54,085 INFO L231 Difference]: Finished difference. Result has 249 places, 575 transitions, 9068 flow [2024-06-27 23:08:54,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9068, PETRI_PLACES=249, PETRI_TRANSITIONS=575} [2024-06-27 23:08:54,086 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-27 23:08:54,086 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 575 transitions, 9068 flow [2024-06-27 23:08:54,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:54,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:54,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:54,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:08:54,086 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:54,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:54,088 INFO L85 PathProgramCache]: Analyzing trace with hash 746885872, now seen corresponding path program 11 times [2024-06-27 23:08:54,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:54,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431984957] [2024-06-27 23:08:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:54,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431984957] [2024-06-27 23:08:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431984957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:55,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:55,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833984106] [2024-06-27 23:08:55,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:55,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:55,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:55,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:55,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 575 transitions, 9068 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:55,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:55,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:55,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:57,444 INFO L124 PetriNetUnfolderBase]: 4289/6568 cut-off events. [2024-06-27 23:08:57,444 INFO L125 PetriNetUnfolderBase]: For 309116/309128 co-relation queries the response was YES. [2024-06-27 23:08:57,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46485 conditions, 6568 events. 4289/6568 cut-off events. For 309116/309128 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 37369 event pairs, 1068 based on Foata normal form. 12/6531 useless extension candidates. Maximal degree in co-relation 46376. Up to 4575 conditions per place. [2024-06-27 23:08:57,515 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 270 selfloop transitions, 392 changer transitions 0/667 dead transitions. [2024-06-27 23:08:57,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 667 transitions, 11437 flow [2024-06-27 23:08:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:08:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:08:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:08:57,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 23:08:57,517 INFO L175 Difference]: Start difference. First operand has 249 places, 575 transitions, 9068 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:08:57,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 667 transitions, 11437 flow [2024-06-27 23:08:58,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 667 transitions, 11271 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 23:08:58,258 INFO L231 Difference]: Finished difference. Result has 257 places, 631 transitions, 10453 flow [2024-06-27 23:08:58,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10453, PETRI_PLACES=257, PETRI_TRANSITIONS=631} [2024-06-27 23:08:58,259 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-27 23:08:58,259 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 631 transitions, 10453 flow [2024-06-27 23:08:58,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:58,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:58,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:08:58,260 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:58,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash 673832452, now seen corresponding path program 12 times [2024-06-27 23:08:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568391161] [2024-06-27 23:08:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:59,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:59,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568391161] [2024-06-27 23:08:59,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568391161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:59,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:59,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:59,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996842536] [2024-06-27 23:08:59,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:59,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:08:59,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 631 transitions, 10453 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:08:59,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:59,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:08:59,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:01,641 INFO L124 PetriNetUnfolderBase]: 4436/6801 cut-off events. [2024-06-27 23:09:01,641 INFO L125 PetriNetUnfolderBase]: For 340768/340780 co-relation queries the response was YES. [2024-06-27 23:09:01,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49957 conditions, 6801 events. 4436/6801 cut-off events. For 340768/340780 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 39091 event pairs, 1089 based on Foata normal form. 14/6766 useless extension candidates. Maximal degree in co-relation 49844. Up to 4700 conditions per place. [2024-06-27 23:09:01,731 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 297 selfloop transitions, 394 changer transitions 0/696 dead transitions. [2024-06-27 23:09:01,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 696 transitions, 12803 flow [2024-06-27 23:09:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 23:09:01,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-27 23:09:01,733 INFO L175 Difference]: Start difference. First operand has 257 places, 631 transitions, 10453 flow. Second operand 9 states and 193 transitions. [2024-06-27 23:09:01,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 696 transitions, 12803 flow [2024-06-27 23:09:02,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 696 transitions, 12347 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 23:09:02,386 INFO L231 Difference]: Finished difference. Result has 264 places, 658 transitions, 11305 flow [2024-06-27 23:09:02,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10021, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11305, PETRI_PLACES=264, PETRI_TRANSITIONS=658} [2024-06-27 23:09:02,387 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-27 23:09:02,387 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 658 transitions, 11305 flow [2024-06-27 23:09:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:02,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:02,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:02,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:09:02,387 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:02,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash 751527502, now seen corresponding path program 13 times [2024-06-27 23:09:02,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:02,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307275750] [2024-06-27 23:09:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:02,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:03,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:03,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307275750] [2024-06-27 23:09:03,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307275750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:03,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:03,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:03,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126910398] [2024-06-27 23:09:03,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:03,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:03,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:04,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:04,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 658 transitions, 11305 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:04,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:04,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:04,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:05,915 INFO L124 PetriNetUnfolderBase]: 4414/6770 cut-off events. [2024-06-27 23:09:05,915 INFO L125 PetriNetUnfolderBase]: For 354579/354591 co-relation queries the response was YES. [2024-06-27 23:09:05,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49978 conditions, 6770 events. 4414/6770 cut-off events. For 354579/354591 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38918 event pairs, 1095 based on Foata normal form. 14/6735 useless extension candidates. Maximal degree in co-relation 49862. Up to 4682 conditions per place. [2024-06-27 23:09:05,983 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 391 changer transitions 0/694 dead transitions. [2024-06-27 23:09:05,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 694 transitions, 13025 flow [2024-06-27 23:09:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 23:09:05,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-27 23:09:05,993 INFO L175 Difference]: Start difference. First operand has 264 places, 658 transitions, 11305 flow. Second operand 9 states and 193 transitions. [2024-06-27 23:09:05,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 694 transitions, 13025 flow [2024-06-27 23:09:06,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 694 transitions, 12510 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-27 23:09:06,712 INFO L231 Difference]: Finished difference. Result has 270 places, 658 transitions, 11594 flow [2024-06-27 23:09:06,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10790, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11594, PETRI_PLACES=270, PETRI_TRANSITIONS=658} [2024-06-27 23:09:06,714 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-27 23:09:06,714 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 658 transitions, 11594 flow [2024-06-27 23:09:06,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:06,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:06,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:06,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:09:06,716 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:06,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash 924017392, now seen corresponding path program 14 times [2024-06-27 23:09:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:06,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614617218] [2024-06-27 23:09:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:06,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:08,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:08,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614617218] [2024-06-27 23:09:08,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614617218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:08,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:08,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:08,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528432757] [2024-06-27 23:09:08,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:08,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:08,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:08,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:08,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:08,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:08,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 658 transitions, 11594 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:08,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:08,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:08,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:10,294 INFO L124 PetriNetUnfolderBase]: 4602/7051 cut-off events. [2024-06-27 23:09:10,294 INFO L125 PetriNetUnfolderBase]: For 394043/394055 co-relation queries the response was YES. [2024-06-27 23:09:10,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52530 conditions, 7051 events. 4602/7051 cut-off events. For 394043/394055 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 40696 event pairs, 1169 based on Foata normal form. 16/7018 useless extension candidates. Maximal degree in co-relation 52412. Up to 4843 conditions per place. [2024-06-27 23:09:10,381 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 306 selfloop transitions, 420 changer transitions 0/731 dead transitions. [2024-06-27 23:09:10,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 731 transitions, 14260 flow [2024-06-27 23:09:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 23:09:10,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 23:09:10,382 INFO L175 Difference]: Start difference. First operand has 270 places, 658 transitions, 11594 flow. Second operand 9 states and 195 transitions. [2024-06-27 23:09:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 731 transitions, 14260 flow [2024-06-27 23:09:11,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 731 transitions, 13506 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:09:11,257 INFO L231 Difference]: Finished difference. Result has 275 places, 692 transitions, 12401 flow [2024-06-27 23:09:11,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10904, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12401, PETRI_PLACES=275, PETRI_TRANSITIONS=692} [2024-06-27 23:09:11,258 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-27 23:09:11,258 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 692 transitions, 12401 flow [2024-06-27 23:09:11,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:11,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:11,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:11,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:09:11,259 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:11,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash 924023902, now seen corresponding path program 15 times [2024-06-27 23:09:11,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:11,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666252767] [2024-06-27 23:09:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:11,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:12,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:12,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666252767] [2024-06-27 23:09:12,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666252767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:12,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:12,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:12,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496399742] [2024-06-27 23:09:12,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:12,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:12,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:12,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 692 transitions, 12401 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:12,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:12,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:12,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:14,634 INFO L124 PetriNetUnfolderBase]: 4666/7135 cut-off events. [2024-06-27 23:09:14,634 INFO L125 PetriNetUnfolderBase]: For 410372/410384 co-relation queries the response was YES. [2024-06-27 23:09:14,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53792 conditions, 7135 events. 4666/7135 cut-off events. For 410372/410384 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 41108 event pairs, 1136 based on Foata normal form. 16/7102 useless extension candidates. Maximal degree in co-relation 53672. Up to 4901 conditions per place. [2024-06-27 23:09:14,719 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 314 selfloop transitions, 426 changer transitions 0/745 dead transitions. [2024-06-27 23:09:14,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 745 transitions, 14735 flow [2024-06-27 23:09:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 23:09:14,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-27 23:09:14,722 INFO L175 Difference]: Start difference. First operand has 275 places, 692 transitions, 12401 flow. Second operand 9 states and 196 transitions. [2024-06-27 23:09:14,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 745 transitions, 14735 flow [2024-06-27 23:09:15,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 745 transitions, 13953 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:15,615 INFO L231 Difference]: Finished difference. Result has 280 places, 704 transitions, 12745 flow [2024-06-27 23:09:15,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11631, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12745, PETRI_PLACES=280, PETRI_TRANSITIONS=704} [2024-06-27 23:09:15,617 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-27 23:09:15,617 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 704 transitions, 12745 flow [2024-06-27 23:09:15,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:15,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:15,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:15,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:09:15,618 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:15,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash 924254542, now seen corresponding path program 16 times [2024-06-27 23:09:15,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:15,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057997816] [2024-06-27 23:09:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:17,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057997816] [2024-06-27 23:09:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057997816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:17,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:17,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232682952] [2024-06-27 23:09:17,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:17,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:17,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:17,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:17,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 704 transitions, 12745 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:17,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:17,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:17,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:18,955 INFO L124 PetriNetUnfolderBase]: 4638/7101 cut-off events. [2024-06-27 23:09:18,955 INFO L125 PetriNetUnfolderBase]: For 416457/416469 co-relation queries the response was YES. [2024-06-27 23:09:19,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53319 conditions, 7101 events. 4638/7101 cut-off events. For 416457/416469 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 41020 event pairs, 1127 based on Foata normal form. 16/7068 useless extension candidates. Maximal degree in co-relation 53198. Up to 4878 conditions per place. [2024-06-27 23:09:19,038 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 300 selfloop transitions, 436 changer transitions 0/741 dead transitions. [2024-06-27 23:09:19,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 741 transitions, 14629 flow [2024-06-27 23:09:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:09:19,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 23:09:19,044 INFO L175 Difference]: Start difference. First operand has 280 places, 704 transitions, 12745 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:09:19,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 741 transitions, 14629 flow [2024-06-27 23:09:20,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 741 transitions, 13738 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-27 23:09:20,057 INFO L231 Difference]: Finished difference. Result has 284 places, 704 transitions, 12749 flow [2024-06-27 23:09:20,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11854, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12749, PETRI_PLACES=284, PETRI_TRANSITIONS=704} [2024-06-27 23:09:20,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-27 23:09:20,058 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 704 transitions, 12749 flow [2024-06-27 23:09:20,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:20,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:20,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:20,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:09:20,058 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:20,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash 519464384, now seen corresponding path program 2 times [2024-06-27 23:09:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:20,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366938876] [2024-06-27 23:09:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:21,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:21,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366938876] [2024-06-27 23:09:21,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366938876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:21,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:21,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:09:21,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509682979] [2024-06-27 23:09:21,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:21,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:09:21,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:09:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:09:21,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:09:21,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 704 transitions, 12749 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:21,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:21,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:09:21,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:22,618 INFO L124 PetriNetUnfolderBase]: 4159/6481 cut-off events. [2024-06-27 23:09:22,618 INFO L125 PetriNetUnfolderBase]: For 469133/469382 co-relation queries the response was YES. [2024-06-27 23:09:22,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50978 conditions, 6481 events. 4159/6481 cut-off events. For 469133/469382 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 38351 event pairs, 1195 based on Foata normal form. 126/6408 useless extension candidates. Maximal degree in co-relation 50856. Up to 5746 conditions per place. [2024-06-27 23:09:22,685 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 585 selfloop transitions, 40 changer transitions 0/721 dead transitions. [2024-06-27 23:09:22,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 721 transitions, 14087 flow [2024-06-27 23:09:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:09:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:09:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 23:09:22,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-27 23:09:22,687 INFO L175 Difference]: Start difference. First operand has 284 places, 704 transitions, 12749 flow. Second operand 7 states and 137 transitions. [2024-06-27 23:09:22,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 721 transitions, 14087 flow [2024-06-27 23:09:23,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 721 transitions, 13275 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:09:23,476 INFO L231 Difference]: Finished difference. Result has 285 places, 710 transitions, 12092 flow [2024-06-27 23:09:23,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11937, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12092, PETRI_PLACES=285, PETRI_TRANSITIONS=710} [2024-06-27 23:09:23,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-27 23:09:23,476 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 710 transitions, 12092 flow [2024-06-27 23:09:23,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:23,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:23,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:09:23,477 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:23,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1808014838, now seen corresponding path program 17 times [2024-06-27 23:09:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:23,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344594582] [2024-06-27 23:09:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:25,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344594582] [2024-06-27 23:09:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344594582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:25,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:25,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:25,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935320223] [2024-06-27 23:09:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:25,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:25,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 710 transitions, 12092 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:25,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:25,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:25,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:27,100 INFO L124 PetriNetUnfolderBase]: 4722/7230 cut-off events. [2024-06-27 23:09:27,100 INFO L125 PetriNetUnfolderBase]: For 433983/433995 co-relation queries the response was YES. [2024-06-27 23:09:27,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53283 conditions, 7230 events. 4722/7230 cut-off events. For 433983/433995 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41756 event pairs, 954 based on Foata normal form. 18/7228 useless extension candidates. Maximal degree in co-relation 53161. Up to 4964 conditions per place. [2024-06-27 23:09:27,180 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 279 selfloop transitions, 475 changer transitions 0/759 dead transitions. [2024-06-27 23:09:27,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 759 transitions, 14243 flow [2024-06-27 23:09:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 23:09:27,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-27 23:09:27,181 INFO L175 Difference]: Start difference. First operand has 285 places, 710 transitions, 12092 flow. Second operand 9 states and 185 transitions. [2024-06-27 23:09:27,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 759 transitions, 14243 flow [2024-06-27 23:09:28,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 759 transitions, 14176 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:28,102 INFO L231 Difference]: Finished difference. Result has 290 places, 722 transitions, 13221 flow [2024-06-27 23:09:28,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12025, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13221, PETRI_PLACES=290, PETRI_TRANSITIONS=722} [2024-06-27 23:09:28,103 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-27 23:09:28,103 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 722 transitions, 13221 flow [2024-06-27 23:09:28,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:28,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:28,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:09:28,104 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:28,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash 255508814, now seen corresponding path program 18 times [2024-06-27 23:09:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:28,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67247702] [2024-06-27 23:09:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:29,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67247702] [2024-06-27 23:09:29,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67247702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:29,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:29,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:29,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550153301] [2024-06-27 23:09:29,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:29,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:29,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:29,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:29,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 722 transitions, 13221 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:29,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:29,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:29,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:31,652 INFO L124 PetriNetUnfolderBase]: 4786/7323 cut-off events. [2024-06-27 23:09:31,653 INFO L125 PetriNetUnfolderBase]: For 464911/464923 co-relation queries the response was YES. [2024-06-27 23:09:31,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56077 conditions, 7323 events. 4786/7323 cut-off events. For 464911/464923 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 42411 event pairs, 1079 based on Foata normal form. 18/7321 useless extension candidates. Maximal degree in co-relation 55955. Up to 5022 conditions per place. [2024-06-27 23:09:31,741 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 312 selfloop transitions, 455 changer transitions 0/772 dead transitions. [2024-06-27 23:09:31,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 772 transitions, 15454 flow [2024-06-27 23:09:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 23:09:31,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:09:31,749 INFO L175 Difference]: Start difference. First operand has 290 places, 722 transitions, 13221 flow. Second operand 9 states and 189 transitions. [2024-06-27 23:09:31,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 772 transitions, 15454 flow [2024-06-27 23:09:32,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 772 transitions, 14877 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:32,862 INFO L231 Difference]: Finished difference. Result has 295 places, 734 transitions, 13824 flow [2024-06-27 23:09:32,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12656, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13824, PETRI_PLACES=295, PETRI_TRANSITIONS=734} [2024-06-27 23:09:32,863 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-27 23:09:32,863 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 734 transitions, 13824 flow [2024-06-27 23:09:32,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:32,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:32,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:32,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:09:32,863 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:32,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash 255271664, now seen corresponding path program 19 times [2024-06-27 23:09:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:32,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437466439] [2024-06-27 23:09:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:34,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:34,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437466439] [2024-06-27 23:09:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437466439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:34,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:34,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:34,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287348109] [2024-06-27 23:09:34,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:34,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:34,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:34,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:34,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:34,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 734 transitions, 13824 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:34,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:34,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:34,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:36,439 INFO L124 PetriNetUnfolderBase]: 4850/7418 cut-off events. [2024-06-27 23:09:36,440 INFO L125 PetriNetUnfolderBase]: For 494029/494041 co-relation queries the response was YES. [2024-06-27 23:09:36,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57017 conditions, 7418 events. 4850/7418 cut-off events. For 494029/494041 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42921 event pairs, 1028 based on Foata normal form. 18/7416 useless extension candidates. Maximal degree in co-relation 56894. Up to 5080 conditions per place. [2024-06-27 23:09:36,525 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 477 changer transitions 0/780 dead transitions. [2024-06-27 23:09:36,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 780 transitions, 16016 flow [2024-06-27 23:09:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:09:36,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 23:09:36,527 INFO L175 Difference]: Start difference. First operand has 295 places, 734 transitions, 13824 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:09:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 780 transitions, 16016 flow [2024-06-27 23:09:37,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 780 transitions, 14507 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-27 23:09:37,699 INFO L231 Difference]: Finished difference. Result has 296 places, 746 transitions, 13549 flow [2024-06-27 23:09:37,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12359, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13549, PETRI_PLACES=296, PETRI_TRANSITIONS=746} [2024-06-27 23:09:37,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-27 23:09:37,700 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 746 transitions, 13549 flow [2024-06-27 23:09:37,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:37,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:37,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:09:37,701 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:37,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash 255278174, now seen corresponding path program 20 times [2024-06-27 23:09:37,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:37,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46357531] [2024-06-27 23:09:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:37,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:39,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:39,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46357531] [2024-06-27 23:09:39,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46357531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:39,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:39,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64926749] [2024-06-27 23:09:39,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:39,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:39,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:39,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:39,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:39,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 746 transitions, 13549 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:39,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:39,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:39,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:41,201 INFO L124 PetriNetUnfolderBase]: 4822/7380 cut-off events. [2024-06-27 23:09:41,201 INFO L125 PetriNetUnfolderBase]: For 478536/478548 co-relation queries the response was YES. [2024-06-27 23:09:41,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56114 conditions, 7380 events. 4822/7380 cut-off events. For 478536/478548 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 42781 event pairs, 1032 based on Foata normal form. 18/7378 useless extension candidates. Maximal degree in co-relation 55992. Up to 5057 conditions per place. [2024-06-27 23:09:41,282 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 306 selfloop transitions, 469 changer transitions 0/780 dead transitions. [2024-06-27 23:09:41,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 780 transitions, 15319 flow [2024-06-27 23:09:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 23:09:41,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 23:09:41,284 INFO L175 Difference]: Start difference. First operand has 296 places, 746 transitions, 13549 flow. Second operand 9 states and 186 transitions. [2024-06-27 23:09:41,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 780 transitions, 15319 flow [2024-06-27 23:09:42,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 780 transitions, 13860 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-27 23:09:42,487 INFO L231 Difference]: Finished difference. Result has 297 places, 746 transitions, 13047 flow [2024-06-27 23:09:42,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12090, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13047, PETRI_PLACES=297, PETRI_TRANSITIONS=746} [2024-06-27 23:09:42,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-27 23:09:42,488 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 746 transitions, 13047 flow [2024-06-27 23:09:42,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:42,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:42,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:42,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:09:42,489 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:42,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash 533749184, now seen corresponding path program 3 times [2024-06-27 23:09:42,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:42,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333992428] [2024-06-27 23:09:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:43,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333992428] [2024-06-27 23:09:43,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333992428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:43,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:43,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:09:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866521433] [2024-06-27 23:09:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:09:43,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:09:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:09:43,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:09:43,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 746 transitions, 13047 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:43,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:43,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:09:43,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:45,104 INFO L124 PetriNetUnfolderBase]: 4272/6649 cut-off events. [2024-06-27 23:09:45,104 INFO L125 PetriNetUnfolderBase]: For 527766/528015 co-relation queries the response was YES. [2024-06-27 23:09:45,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52730 conditions, 6649 events. 4272/6649 cut-off events. For 527766/528015 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39594 event pairs, 1214 based on Foata normal form. 117/6535 useless extension candidates. Maximal degree in co-relation 52607. Up to 5893 conditions per place. [2024-06-27 23:09:45,186 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 614 selfloop transitions, 47 changer transitions 0/757 dead transitions. [2024-06-27 23:09:45,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 757 transitions, 14439 flow [2024-06-27 23:09:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:09:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:09:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 23:09:45,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 23:09:45,187 INFO L175 Difference]: Start difference. First operand has 297 places, 746 transitions, 13047 flow. Second operand 6 states and 122 transitions. [2024-06-27 23:09:45,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 757 transitions, 14439 flow [2024-06-27 23:09:46,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 757 transitions, 13554 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:09:46,168 INFO L231 Difference]: Finished difference. Result has 297 places, 749 transitions, 12308 flow [2024-06-27 23:09:46,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12162, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12308, PETRI_PLACES=297, PETRI_TRANSITIONS=749} [2024-06-27 23:09:46,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-27 23:09:46,169 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 749 transitions, 12308 flow [2024-06-27 23:09:46,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:46,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:46,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:46,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:09:46,174 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:46,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:46,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1388927328, now seen corresponding path program 1 times [2024-06-27 23:09:46,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:46,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124660438] [2024-06-27 23:09:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:46,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:47,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:47,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124660438] [2024-06-27 23:09:47,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124660438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:47,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:47,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:09:47,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534440259] [2024-06-27 23:09:47,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:47,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:09:47,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:09:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:09:47,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:47,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 749 transitions, 12308 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:47,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:47,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:47,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:49,362 INFO L124 PetriNetUnfolderBase]: 4890/7508 cut-off events. [2024-06-27 23:09:49,362 INFO L125 PetriNetUnfolderBase]: For 486550/486556 co-relation queries the response was YES. [2024-06-27 23:09:49,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55511 conditions, 7508 events. 4890/7508 cut-off events. For 486550/486556 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44106 event pairs, 1416 based on Foata normal form. 10/7516 useless extension candidates. Maximal degree in co-relation 55387. Up to 6621 conditions per place. [2024-06-27 23:09:49,450 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 621 selfloop transitions, 199 changer transitions 0/825 dead transitions. [2024-06-27 23:09:49,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 825 transitions, 14650 flow [2024-06-27 23:09:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 23:09:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 23:09:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 306 transitions. [2024-06-27 23:09:49,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 23:09:49,473 INFO L175 Difference]: Start difference. First operand has 297 places, 749 transitions, 12308 flow. Second operand 16 states and 306 transitions. [2024-06-27 23:09:49,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 825 transitions, 14650 flow [2024-06-27 23:09:50,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 825 transitions, 14528 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:50,500 INFO L231 Difference]: Finished difference. Result has 310 places, 759 transitions, 12765 flow [2024-06-27 23:09:50,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12186, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12765, PETRI_PLACES=310, PETRI_TRANSITIONS=759} [2024-06-27 23:09:50,501 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-27 23:09:50,501 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 759 transitions, 12765 flow [2024-06-27 23:09:50,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:50,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:50,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:50,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:09:50,502 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:50,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1480025098, now seen corresponding path program 2 times [2024-06-27 23:09:50,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:50,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812172053] [2024-06-27 23:09:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:50,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812172053] [2024-06-27 23:09:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812172053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:51,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:09:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043575753] [2024-06-27 23:09:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:09:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:09:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:09:51,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:51,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 759 transitions, 12765 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:51,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:51,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:51,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:53,704 INFO L124 PetriNetUnfolderBase]: 5034/7742 cut-off events. [2024-06-27 23:09:53,704 INFO L125 PetriNetUnfolderBase]: For 522821/522828 co-relation queries the response was YES. [2024-06-27 23:09:53,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58602 conditions, 7742 events. 5034/7742 cut-off events. For 522821/522828 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 45861 event pairs, 992 based on Foata normal form. 8/7747 useless extension candidates. Maximal degree in co-relation 58476. Up to 4287 conditions per place. [2024-06-27 23:09:53,797 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 321 selfloop transitions, 523 changer transitions 0/849 dead transitions. [2024-06-27 23:09:53,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 849 transitions, 15900 flow [2024-06-27 23:09:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:09:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:09:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-27 23:09:53,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49586776859504134 [2024-06-27 23:09:53,799 INFO L175 Difference]: Start difference. First operand has 310 places, 759 transitions, 12765 flow. Second operand 11 states and 240 transitions. [2024-06-27 23:09:53,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 849 transitions, 15900 flow [2024-06-27 23:09:55,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 849 transitions, 15579 flow, removed 57 selfloop flow, removed 11 redundant places. [2024-06-27 23:09:55,054 INFO L231 Difference]: Finished difference. Result has 312 places, 785 transitions, 14115 flow [2024-06-27 23:09:55,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14115, PETRI_PLACES=312, PETRI_TRANSITIONS=785} [2024-06-27 23:09:55,055 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 267 predicate places. [2024-06-27 23:09:55,055 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 785 transitions, 14115 flow [2024-06-27 23:09:55,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:55,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:55,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:55,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:09:55,056 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:55,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1425744806, now seen corresponding path program 3 times [2024-06-27 23:09:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:55,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073005511] [2024-06-27 23:09:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:56,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:56,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073005511] [2024-06-27 23:09:56,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073005511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:56,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:56,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:09:56,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041474509] [2024-06-27 23:09:56,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:56,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:09:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:09:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:09:56,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:09:56,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 785 transitions, 14115 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:56,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:56,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:09:56,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:58,390 INFO L124 PetriNetUnfolderBase]: 5032/7757 cut-off events. [2024-06-27 23:09:58,390 INFO L125 PetriNetUnfolderBase]: For 548972/548978 co-relation queries the response was YES. [2024-06-27 23:09:58,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61260 conditions, 7757 events. 5032/7757 cut-off events. For 548972/548978 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 46340 event pairs, 1492 based on Foata normal form. 12/7767 useless extension candidates. Maximal degree in co-relation 61130. Up to 7031 conditions per place. [2024-06-27 23:09:58,488 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 682 selfloop transitions, 140 changer transitions 0/827 dead transitions. [2024-06-27 23:09:58,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 827 transitions, 15936 flow [2024-06-27 23:09:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:09:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:09:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 23:09:58,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 23:09:58,490 INFO L175 Difference]: Start difference. First operand has 312 places, 785 transitions, 14115 flow. Second operand 11 states and 214 transitions. [2024-06-27 23:09:58,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 827 transitions, 15936 flow [2024-06-27 23:09:59,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 827 transitions, 15599 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 23:09:59,734 INFO L231 Difference]: Finished difference. Result has 319 places, 788 transitions, 14112 flow [2024-06-27 23:09:59,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13786, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14112, PETRI_PLACES=319, PETRI_TRANSITIONS=788} [2024-06-27 23:09:59,735 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-27 23:09:59,735 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 788 transitions, 14112 flow [2024-06-27 23:09:59,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:09:59,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:59,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:59,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:09:59,736 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:59,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:59,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1478733328, now seen corresponding path program 4 times [2024-06-27 23:09:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:59,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495861932] [2024-06-27 23:09:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:59,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495861932] [2024-06-27 23:10:00,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495861932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:00,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:00,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:00,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147111047] [2024-06-27 23:10:00,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:00,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:01,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:01,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 788 transitions, 14112 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:01,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:01,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:01,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:03,186 INFO L124 PetriNetUnfolderBase]: 5022/7729 cut-off events. [2024-06-27 23:10:03,187 INFO L125 PetriNetUnfolderBase]: For 546786/546793 co-relation queries the response was YES. [2024-06-27 23:10:03,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61002 conditions, 7729 events. 5022/7729 cut-off events. For 546786/546793 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 45805 event pairs, 989 based on Foata normal form. 8/7734 useless extension candidates. Maximal degree in co-relation 60870. Up to 4279 conditions per place. [2024-06-27 23:10:03,292 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 306 selfloop transitions, 536 changer transitions 0/847 dead transitions. [2024-06-27 23:10:03,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 847 transitions, 16481 flow [2024-06-27 23:10:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-27 23:10:03,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834710743801653 [2024-06-27 23:10:03,294 INFO L175 Difference]: Start difference. First operand has 319 places, 788 transitions, 14112 flow. Second operand 11 states and 234 transitions. [2024-06-27 23:10:03,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 847 transitions, 16481 flow [2024-06-27 23:10:04,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 847 transitions, 16123 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-27 23:10:04,828 INFO L231 Difference]: Finished difference. Result has 320 places, 788 transitions, 14837 flow [2024-06-27 23:10:04,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13754, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=536, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14837, PETRI_PLACES=320, PETRI_TRANSITIONS=788} [2024-06-27 23:10:04,829 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-27 23:10:04,829 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 788 transitions, 14837 flow [2024-06-27 23:10:04,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:04,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:04,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:04,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:10:04,830 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:04,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash -183751824, now seen corresponding path program 5 times [2024-06-27 23:10:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608776994] [2024-06-27 23:10:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:06,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608776994] [2024-06-27 23:10:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608776994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:06,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459042551] [2024-06-27 23:10:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:06,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:06,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:06,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 788 transitions, 14837 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:06,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:06,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:06,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:08,412 INFO L124 PetriNetUnfolderBase]: 5086/7851 cut-off events. [2024-06-27 23:10:08,413 INFO L125 PetriNetUnfolderBase]: For 579801/579805 co-relation queries the response was YES. [2024-06-27 23:10:08,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63443 conditions, 7851 events. 5086/7851 cut-off events. For 579801/579805 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 47030 event pairs, 1505 based on Foata normal form. 10/7859 useless extension candidates. Maximal degree in co-relation 63310. Up to 7102 conditions per place. [2024-06-27 23:10:08,524 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 694 selfloop transitions, 140 changer transitions 0/839 dead transitions. [2024-06-27 23:10:08,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 839 transitions, 16819 flow [2024-06-27 23:10:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 23:10:08,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 23:10:08,526 INFO L175 Difference]: Start difference. First operand has 320 places, 788 transitions, 14837 flow. Second operand 11 states and 214 transitions. [2024-06-27 23:10:08,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 839 transitions, 16819 flow [2024-06-27 23:10:09,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 839 transitions, 15891 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:09,988 INFO L231 Difference]: Finished difference. Result has 324 places, 800 transitions, 14391 flow [2024-06-27 23:10:09,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13932, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14391, PETRI_PLACES=324, PETRI_TRANSITIONS=800} [2024-06-27 23:10:09,989 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-27 23:10:09,989 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 800 transitions, 14391 flow [2024-06-27 23:10:09,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:09,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:09,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:09,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:10:09,990 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:09,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash 358008852, now seen corresponding path program 6 times [2024-06-27 23:10:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277534809] [2024-06-27 23:10:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:11,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277534809] [2024-06-27 23:10:11,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277534809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:11,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187111246] [2024-06-27 23:10:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:11,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:11,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:11,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 800 transitions, 14391 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:11,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:11,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:11,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:13,532 INFO L124 PetriNetUnfolderBase]: 5297/8215 cut-off events. [2024-06-27 23:10:13,532 INFO L125 PetriNetUnfolderBase]: For 609438/609445 co-relation queries the response was YES. [2024-06-27 23:10:13,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64790 conditions, 8215 events. 5297/8215 cut-off events. For 609438/609445 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 50005 event pairs, 1127 based on Foata normal form. 10/8222 useless extension candidates. Maximal degree in co-relation 64656. Up to 4514 conditions per place. [2024-06-27 23:10:13,647 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 358 selfloop transitions, 548 changer transitions 0/911 dead transitions. [2024-06-27 23:10:13,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 911 transitions, 17965 flow [2024-06-27 23:10:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-27 23:10:13,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493801652892562 [2024-06-27 23:10:13,649 INFO L175 Difference]: Start difference. First operand has 324 places, 800 transitions, 14391 flow. Second operand 11 states and 239 transitions. [2024-06-27 23:10:13,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 911 transitions, 17965 flow [2024-06-27 23:10:15,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 911 transitions, 17678 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 23:10:15,164 INFO L231 Difference]: Finished difference. Result has 329 places, 839 transitions, 15913 flow [2024-06-27 23:10:15,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14104, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15913, PETRI_PLACES=329, PETRI_TRANSITIONS=839} [2024-06-27 23:10:15,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-27 23:10:15,165 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 839 transitions, 15913 flow [2024-06-27 23:10:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:15,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:15,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:15,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:10:15,165 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:15,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash -180032754, now seen corresponding path program 7 times [2024-06-27 23:10:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:15,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626846172] [2024-06-27 23:10:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:15,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:16,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:16,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626846172] [2024-06-27 23:10:16,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626846172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:16,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:16,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:16,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237064111] [2024-06-27 23:10:16,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:16,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:16,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:16,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 839 transitions, 15913 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:16,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:16,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:16,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:18,742 INFO L124 PetriNetUnfolderBase]: 5281/8189 cut-off events. [2024-06-27 23:10:18,742 INFO L125 PetriNetUnfolderBase]: For 629906/629913 co-relation queries the response was YES. [2024-06-27 23:10:18,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67003 conditions, 8189 events. 5281/8189 cut-off events. For 629906/629913 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 49851 event pairs, 1138 based on Foata normal form. 10/8196 useless extension candidates. Maximal degree in co-relation 66866. Up to 4501 conditions per place. [2024-06-27 23:10:18,854 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 360 selfloop transitions, 543 changer transitions 0/908 dead transitions. [2024-06-27 23:10:18,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 908 transitions, 18787 flow [2024-06-27 23:10:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-27 23:10:18,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493801652892562 [2024-06-27 23:10:18,856 INFO L175 Difference]: Start difference. First operand has 329 places, 839 transitions, 15913 flow. Second operand 11 states and 239 transitions. [2024-06-27 23:10:18,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 908 transitions, 18787 flow [2024-06-27 23:10:20,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 908 transitions, 18152 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:20,701 INFO L231 Difference]: Finished difference. Result has 335 places, 839 transitions, 16379 flow [2024-06-27 23:10:20,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15278, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16379, PETRI_PLACES=335, PETRI_TRANSITIONS=839} [2024-06-27 23:10:20,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-27 23:10:20,702 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 839 transitions, 16379 flow [2024-06-27 23:10:20,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:20,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:20,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:20,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:10:20,703 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:20,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash 484318286, now seen corresponding path program 8 times [2024-06-27 23:10:20,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:20,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342848030] [2024-06-27 23:10:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:20,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:22,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:22,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342848030] [2024-06-27 23:10:22,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342848030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:22,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:22,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417307238] [2024-06-27 23:10:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:22,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:22,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:22,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:22,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 839 transitions, 16379 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:22,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:22,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:22,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:24,447 INFO L124 PetriNetUnfolderBase]: 5344/8277 cut-off events. [2024-06-27 23:10:24,448 INFO L125 PetriNetUnfolderBase]: For 660632/660637 co-relation queries the response was YES. [2024-06-27 23:10:24,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68245 conditions, 8277 events. 5344/8277 cut-off events. For 660632/660637 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 50365 event pairs, 1092 based on Foata normal form. 8/8282 useless extension candidates. Maximal degree in co-relation 68107. Up to 4556 conditions per place. [2024-06-27 23:10:24,823 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 358 selfloop transitions, 551 changer transitions 0/914 dead transitions. [2024-06-27 23:10:24,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 914 transitions, 19396 flow [2024-06-27 23:10:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-27 23:10:24,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896694214876033 [2024-06-27 23:10:24,824 INFO L175 Difference]: Start difference. First operand has 335 places, 839 transitions, 16379 flow. Second operand 11 states and 237 transitions. [2024-06-27 23:10:24,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 914 transitions, 19396 flow [2024-06-27 23:10:26,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 914 transitions, 18250 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 23:10:26,588 INFO L231 Difference]: Finished difference. Result has 338 places, 851 transitions, 16570 flow [2024-06-27 23:10:26,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15255, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16570, PETRI_PLACES=338, PETRI_TRANSITIONS=851} [2024-06-27 23:10:26,591 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-27 23:10:26,591 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 851 transitions, 16570 flow [2024-06-27 23:10:26,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:26,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:26,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:10:26,591 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:26,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash -35934834, now seen corresponding path program 9 times [2024-06-27 23:10:26,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:26,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679777034] [2024-06-27 23:10:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:26,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:27,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679777034] [2024-06-27 23:10:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679777034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:27,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:27,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008924864] [2024-06-27 23:10:27,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:27,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:28,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:28,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 851 transitions, 16570 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:28,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:28,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:28,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:30,469 INFO L124 PetriNetUnfolderBase]: 5380/8343 cut-off events. [2024-06-27 23:10:30,469 INFO L125 PetriNetUnfolderBase]: For 679082/679087 co-relation queries the response was YES. [2024-06-27 23:10:30,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68990 conditions, 8343 events. 5380/8343 cut-off events. For 679082/679087 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50958 event pairs, 1081 based on Foata normal form. 8/8348 useless extension candidates. Maximal degree in co-relation 68850. Up to 4588 conditions per place. [2024-06-27 23:10:30,574 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 340 selfloop transitions, 576 changer transitions 0/921 dead transitions. [2024-06-27 23:10:30,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 921 transitions, 19549 flow [2024-06-27 23:10:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-27 23:10:30,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855371900826446 [2024-06-27 23:10:30,576 INFO L175 Difference]: Start difference. First operand has 338 places, 851 transitions, 16570 flow. Second operand 11 states and 235 transitions. [2024-06-27 23:10:30,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 921 transitions, 19549 flow [2024-06-27 23:10:32,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 921 transitions, 18717 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:32,452 INFO L231 Difference]: Finished difference. Result has 343 places, 857 transitions, 17018 flow [2024-06-27 23:10:32,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15764, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17018, PETRI_PLACES=343, PETRI_TRANSITIONS=857} [2024-06-27 23:10:32,453 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-27 23:10:32,453 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 857 transitions, 17018 flow [2024-06-27 23:10:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:32,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:32,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:32,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:10:32,454 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:32,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash -36136644, now seen corresponding path program 10 times [2024-06-27 23:10:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:32,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978101081] [2024-06-27 23:10:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:32,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:33,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:33,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978101081] [2024-06-27 23:10:33,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978101081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:33,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:33,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971419669] [2024-06-27 23:10:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:33,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:33,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:33,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:33,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 857 transitions, 17018 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:33,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:33,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:33,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:36,318 INFO L124 PetriNetUnfolderBase]: 5364/8328 cut-off events. [2024-06-27 23:10:36,318 INFO L125 PetriNetUnfolderBase]: For 696109/696114 co-relation queries the response was YES. [2024-06-27 23:10:36,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68880 conditions, 8328 events. 5364/8328 cut-off events. For 696109/696114 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 50923 event pairs, 1093 based on Foata normal form. 8/8333 useless extension candidates. Maximal degree in co-relation 68739. Up to 4575 conditions per place. [2024-06-27 23:10:36,443 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 363 selfloop transitions, 552 changer transitions 0/920 dead transitions. [2024-06-27 23:10:36,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 920 transitions, 19657 flow [2024-06-27 23:10:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-27 23:10:36,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-27 23:10:36,445 INFO L175 Difference]: Start difference. First operand has 343 places, 857 transitions, 17018 flow. Second operand 11 states and 236 transitions. [2024-06-27 23:10:36,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 920 transitions, 19657 flow [2024-06-27 23:10:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 920 transitions, 18667 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:38,805 INFO L231 Difference]: Finished difference. Result has 347 places, 857 transitions, 17146 flow [2024-06-27 23:10:38,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16028, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17146, PETRI_PLACES=347, PETRI_TRANSITIONS=857} [2024-06-27 23:10:38,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-27 23:10:38,807 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 857 transitions, 17146 flow [2024-06-27 23:10:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:38,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:38,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:38,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:10:38,807 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:38,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash -736726428, now seen corresponding path program 1 times [2024-06-27 23:10:38,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:38,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788361829] [2024-06-27 23:10:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:39,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788361829] [2024-06-27 23:10:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788361829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:39,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:39,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:10:39,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157283044] [2024-06-27 23:10:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:10:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:10:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:10:40,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:10:40,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 857 transitions, 17146 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:40,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:40,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:10:40,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:41,824 INFO L124 PetriNetUnfolderBase]: 5226/8128 cut-off events. [2024-06-27 23:10:41,825 INFO L125 PetriNetUnfolderBase]: For 758068/758254 co-relation queries the response was YES. [2024-06-27 23:10:41,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69228 conditions, 8128 events. 5226/8128 cut-off events. For 758068/758254 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49959 event pairs, 1402 based on Foata normal form. 60/8110 useless extension candidates. Maximal degree in co-relation 69086. Up to 7341 conditions per place. [2024-06-27 23:10:41,943 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 745 selfloop transitions, 103 changer transitions 0/890 dead transitions. [2024-06-27 23:10:41,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 890 transitions, 19112 flow [2024-06-27 23:10:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:10:41,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 23:10:41,944 INFO L175 Difference]: Start difference. First operand has 347 places, 857 transitions, 17146 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:10:41,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 890 transitions, 19112 flow [2024-06-27 23:10:44,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 890 transitions, 17922 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 23:10:44,089 INFO L231 Difference]: Finished difference. Result has 347 places, 867 transitions, 16413 flow [2024-06-27 23:10:44,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15960, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16413, PETRI_PLACES=347, PETRI_TRANSITIONS=867} [2024-06-27 23:10:44,091 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-27 23:10:44,091 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 867 transitions, 16413 flow [2024-06-27 23:10:44,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:44,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:44,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:44,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:10:44,092 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:44,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:44,092 INFO L85 PathProgramCache]: Analyzing trace with hash 920446322, now seen corresponding path program 11 times [2024-06-27 23:10:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:44,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836747758] [2024-06-27 23:10:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:44,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:45,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:45,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836747758] [2024-06-27 23:10:45,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836747758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:45,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:45,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:45,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081069488] [2024-06-27 23:10:45,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:45,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:45,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:45,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 867 transitions, 16413 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:45,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:45,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:45,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:48,064 INFO L124 PetriNetUnfolderBase]: 5452/8471 cut-off events. [2024-06-27 23:10:48,064 INFO L125 PetriNetUnfolderBase]: For 720669/720671 co-relation queries the response was YES. [2024-06-27 23:10:48,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68949 conditions, 8471 events. 5452/8471 cut-off events. For 720669/720671 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 52049 event pairs, 1225 based on Foata normal form. 8/8477 useless extension candidates. Maximal degree in co-relation 68805. Up to 7621 conditions per place. [2024-06-27 23:10:48,174 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 774 selfloop transitions, 140 changer transitions 0/919 dead transitions. [2024-06-27 23:10:48,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 919 transitions, 18603 flow [2024-06-27 23:10:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 23:10:48,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 23:10:48,176 INFO L175 Difference]: Start difference. First operand has 347 places, 867 transitions, 16413 flow. Second operand 11 states and 214 transitions. [2024-06-27 23:10:48,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 919 transitions, 18603 flow [2024-06-27 23:10:50,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 919 transitions, 18383 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:50,513 INFO L231 Difference]: Finished difference. Result has 353 places, 882 transitions, 16736 flow [2024-06-27 23:10:50,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16193, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16736, PETRI_PLACES=353, PETRI_TRANSITIONS=882} [2024-06-27 23:10:50,513 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-27 23:10:50,514 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 882 transitions, 16736 flow [2024-06-27 23:10:50,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:50,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:50,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:50,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:10:50,514 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:50,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash -668396320, now seen corresponding path program 12 times [2024-06-27 23:10:50,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:50,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851538670] [2024-06-27 23:10:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:50,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:51,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:51,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851538670] [2024-06-27 23:10:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851538670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:51,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:51,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704948965] [2024-06-27 23:10:51,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:51,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:51,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:51,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:52,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:52,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 882 transitions, 16736 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:52,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:52,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:52,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:54,688 INFO L124 PetriNetUnfolderBase]: 5774/9049 cut-off events. [2024-06-27 23:10:54,688 INFO L125 PetriNetUnfolderBase]: For 778379/778384 co-relation queries the response was YES. [2024-06-27 23:10:54,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73219 conditions, 9049 events. 5774/9049 cut-off events. For 778379/778384 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 57041 event pairs, 1207 based on Foata normal form. 8/9054 useless extension candidates. Maximal degree in co-relation 73074. Up to 4935 conditions per place. [2024-06-27 23:10:54,800 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 371 selfloop transitions, 631 changer transitions 0/1007 dead transitions. [2024-06-27 23:10:54,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1007 transitions, 20815 flow [2024-06-27 23:10:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-27 23:10:54,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49793388429752067 [2024-06-27 23:10:54,802 INFO L175 Difference]: Start difference. First operand has 353 places, 882 transitions, 16736 flow. Second operand 11 states and 241 transitions. [2024-06-27 23:10:54,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1007 transitions, 20815 flow [2024-06-27 23:10:57,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1007 transitions, 20571 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 23:10:57,087 INFO L231 Difference]: Finished difference. Result has 358 places, 946 transitions, 18742 flow [2024-06-27 23:10:57,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16492, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18742, PETRI_PLACES=358, PETRI_TRANSITIONS=946} [2024-06-27 23:10:57,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-27 23:10:57,088 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 946 transitions, 18742 flow [2024-06-27 23:10:57,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:57,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:57,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:57,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:10:57,089 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:57,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash -625551860, now seen corresponding path program 13 times [2024-06-27 23:10:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:57,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146803260] [2024-06-27 23:10:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:57,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:58,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:58,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146803260] [2024-06-27 23:10:58,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146803260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:58,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:58,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:10:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569300381] [2024-06-27 23:10:58,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:10:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:10:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:10:58,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:10:58,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 946 transitions, 18742 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:10:58,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:58,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:10:58,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:01,295 INFO L124 PetriNetUnfolderBase]: 5758/9035 cut-off events. [2024-06-27 23:11:01,295 INFO L125 PetriNetUnfolderBase]: For 802767/802772 co-relation queries the response was YES. [2024-06-27 23:11:01,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75489 conditions, 9035 events. 5758/9035 cut-off events. For 802767/802772 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 57049 event pairs, 1220 based on Foata normal form. 8/9040 useless extension candidates. Maximal degree in co-relation 75341. Up to 4922 conditions per place. [2024-06-27 23:11:01,423 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 365 selfloop transitions, 636 changer transitions 0/1006 dead transitions. [2024-06-27 23:11:01,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1006 transitions, 21784 flow [2024-06-27 23:11:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-27 23:11:01,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896694214876033 [2024-06-27 23:11:01,425 INFO L175 Difference]: Start difference. First operand has 358 places, 946 transitions, 18742 flow. Second operand 11 states and 237 transitions. [2024-06-27 23:11:01,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1006 transitions, 21784 flow [2024-06-27 23:11:03,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1006 transitions, 20959 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 23:11:03,785 INFO L231 Difference]: Finished difference. Result has 364 places, 946 transitions, 19210 flow [2024-06-27 23:11:03,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17917, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19210, PETRI_PLACES=364, PETRI_TRANSITIONS=946} [2024-06-27 23:11:03,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-27 23:11:03,787 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 946 transitions, 19210 flow [2024-06-27 23:11:03,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:03,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:03,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:03,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:11:03,791 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:03,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:03,792 INFO L85 PathProgramCache]: Analyzing trace with hash -481666910, now seen corresponding path program 14 times [2024-06-27 23:11:03,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:03,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841675373] [2024-06-27 23:11:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:03,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:05,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841675373] [2024-06-27 23:11:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841675373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:05,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:05,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:11:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277470284] [2024-06-27 23:11:05,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:05,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:11:05,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:05,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:11:05,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:11:05,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:11:05,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 946 transitions, 19210 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:05,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:05,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:11:05,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:08,090 INFO L124 PetriNetUnfolderBase]: 5905/9290 cut-off events. [2024-06-27 23:11:08,090 INFO L125 PetriNetUnfolderBase]: For 862990/862995 co-relation queries the response was YES. [2024-06-27 23:11:08,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77991 conditions, 9290 events. 5905/9290 cut-off events. For 862990/862995 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 59263 event pairs, 1276 based on Foata normal form. 10/9297 useless extension candidates. Maximal degree in co-relation 77842. Up to 5047 conditions per place. [2024-06-27 23:11:08,227 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 387 selfloop transitions, 643 changer transitions 0/1035 dead transitions. [2024-06-27 23:11:08,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1035 transitions, 23098 flow [2024-06-27 23:11:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-27 23:11:08,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49793388429752067 [2024-06-27 23:11:08,229 INFO L175 Difference]: Start difference. First operand has 364 places, 946 transitions, 19210 flow. Second operand 11 states and 241 transitions. [2024-06-27 23:11:08,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1035 transitions, 23098 flow [2024-06-27 23:11:11,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1035 transitions, 22061 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:11:11,261 INFO L231 Difference]: Finished difference. Result has 368 places, 972 transitions, 20009 flow [2024-06-27 23:11:11,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18221, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20009, PETRI_PLACES=368, PETRI_TRANSITIONS=972} [2024-06-27 23:11:11,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-27 23:11:11,262 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 972 transitions, 20009 flow [2024-06-27 23:11:11,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:11,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:11,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:11,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:11:11,263 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:11,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash -663028360, now seen corresponding path program 15 times [2024-06-27 23:11:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:11,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154724037] [2024-06-27 23:11:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:11,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154724037] [2024-06-27 23:11:12,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154724037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:12,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:12,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:11:12,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312877099] [2024-06-27 23:11:12,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:11:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:11:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:11:12,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:11:12,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 972 transitions, 20009 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:12,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:12,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:11:12,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:15,900 INFO L124 PetriNetUnfolderBase]: 5955/9384 cut-off events. [2024-06-27 23:11:15,900 INFO L125 PetriNetUnfolderBase]: For 894863/894868 co-relation queries the response was YES. [2024-06-27 23:11:15,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79124 conditions, 9384 events. 5955/9384 cut-off events. For 894863/894868 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 60243 event pairs, 1274 based on Foata normal form. 10/9391 useless extension candidates. Maximal degree in co-relation 78973. Up to 5092 conditions per place. [2024-06-27 23:11:16,028 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 396 selfloop transitions, 645 changer transitions 0/1046 dead transitions. [2024-06-27 23:11:16,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1046 transitions, 23682 flow [2024-06-27 23:11:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-27 23:11:16,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:11:16,029 INFO L175 Difference]: Start difference. First operand has 368 places, 972 transitions, 20009 flow. Second operand 11 states and 242 transitions. [2024-06-27 23:11:16,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1046 transitions, 23682 flow [2024-06-27 23:11:18,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1046 transitions, 22117 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-27 23:11:18,915 INFO L231 Difference]: Finished difference. Result has 371 places, 981 transitions, 19947 flow [2024-06-27 23:11:18,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18483, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19947, PETRI_PLACES=371, PETRI_TRANSITIONS=981} [2024-06-27 23:11:18,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-27 23:11:18,916 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 981 transitions, 19947 flow [2024-06-27 23:11:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:18,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:18,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:11:18,916 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:18,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -481459520, now seen corresponding path program 16 times [2024-06-27 23:11:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420935699] [2024-06-27 23:11:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:20,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:20,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420935699] [2024-06-27 23:11:20,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420935699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:20,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:20,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:11:20,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430233112] [2024-06-27 23:11:20,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:20,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:11:20,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:11:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:11:20,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:11:20,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 981 transitions, 19947 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:20,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:20,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:11:20,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:23,312 INFO L124 PetriNetUnfolderBase]: 5933/9352 cut-off events. [2024-06-27 23:11:23,313 INFO L125 PetriNetUnfolderBase]: For 890746/890751 co-relation queries the response was YES. [2024-06-27 23:11:23,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78404 conditions, 9352 events. 5933/9352 cut-off events. For 890746/890751 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 59977 event pairs, 1270 based on Foata normal form. 10/9359 useless extension candidates. Maximal degree in co-relation 78252. Up to 5074 conditions per place. [2024-06-27 23:11:23,452 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 379 selfloop transitions, 658 changer transitions 0/1042 dead transitions. [2024-06-27 23:11:23,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1042 transitions, 23145 flow [2024-06-27 23:11:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:23,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-27 23:11:23,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896694214876033 [2024-06-27 23:11:23,454 INFO L175 Difference]: Start difference. First operand has 371 places, 981 transitions, 19947 flow. Second operand 11 states and 237 transitions. [2024-06-27 23:11:23,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1042 transitions, 23145 flow [2024-06-27 23:11:26,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1042 transitions, 21938 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:26,298 INFO L231 Difference]: Finished difference. Result has 375 places, 981 transitions, 20077 flow [2024-06-27 23:11:26,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18740, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=658, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20077, PETRI_PLACES=375, PETRI_TRANSITIONS=981} [2024-06-27 23:11:26,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-27 23:11:26,299 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 981 transitions, 20077 flow [2024-06-27 23:11:26,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:26,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:26,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:26,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:11:26,300 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:26,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:26,300 INFO L85 PathProgramCache]: Analyzing trace with hash -475035410, now seen corresponding path program 17 times [2024-06-27 23:11:26,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:26,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515508100] [2024-06-27 23:11:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:27,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:27,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515508100] [2024-06-27 23:11:27,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515508100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:27,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:27,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:11:27,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845594369] [2024-06-27 23:11:27,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:27,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:11:27,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:11:27,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:11:27,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:11:27,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 981 transitions, 20077 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:27,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:27,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:11:27,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:30,316 INFO L124 PetriNetUnfolderBase]: 6082/9582 cut-off events. [2024-06-27 23:11:30,316 INFO L125 PetriNetUnfolderBase]: For 943756/943759 co-relation queries the response was YES. [2024-06-27 23:11:30,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80993 conditions, 9582 events. 6082/9582 cut-off events. For 943756/943759 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 61680 event pairs, 1110 based on Foata normal form. 8/9587 useless extension candidates. Maximal degree in co-relation 80840. Up to 5205 conditions per place. [2024-06-27 23:11:30,483 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 383 selfloop transitions, 677 changer transitions 0/1065 dead transitions. [2024-06-27 23:11:30,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1065 transitions, 24073 flow [2024-06-27 23:11:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-27 23:11:30,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493801652892562 [2024-06-27 23:11:30,485 INFO L175 Difference]: Start difference. First operand has 375 places, 981 transitions, 20077 flow. Second operand 11 states and 239 transitions. [2024-06-27 23:11:30,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1065 transitions, 24073 flow [2024-06-27 23:11:33,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1065 transitions, 22811 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:33,780 INFO L231 Difference]: Finished difference. Result has 380 places, 1005 transitions, 20759 flow [2024-06-27 23:11:33,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18861, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20759, PETRI_PLACES=380, PETRI_TRANSITIONS=1005} [2024-06-27 23:11:33,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-27 23:11:33,782 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1005 transitions, 20759 flow [2024-06-27 23:11:33,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:33,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:33,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:33,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:11:33,782 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:33,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash 570552384, now seen corresponding path program 18 times [2024-06-27 23:11:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:33,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542124748] [2024-06-27 23:11:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:33,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:35,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:35,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542124748] [2024-06-27 23:11:35,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542124748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:35,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:35,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:11:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473952474] [2024-06-27 23:11:35,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:11:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:35,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:11:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:11:35,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:11:35,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1005 transitions, 20759 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:35,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:35,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:11:35,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:38,541 INFO L124 PetriNetUnfolderBase]: 6060/9553 cut-off events. [2024-06-27 23:11:38,541 INFO L125 PetriNetUnfolderBase]: For 947847/947850 co-relation queries the response was YES. [2024-06-27 23:11:38,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80832 conditions, 9553 events. 6060/9553 cut-off events. For 947847/947850 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 61484 event pairs, 1108 based on Foata normal form. 8/9558 useless extension candidates. Maximal degree in co-relation 80677. Up to 5187 conditions per place. [2024-06-27 23:11:38,656 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 369 selfloop transitions, 687 changer transitions 0/1061 dead transitions. [2024-06-27 23:11:38,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1061 transitions, 23924 flow [2024-06-27 23:11:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-27 23:11:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-27 23:11:38,658 INFO L175 Difference]: Start difference. First operand has 380 places, 1005 transitions, 20759 flow. Second operand 11 states and 236 transitions. [2024-06-27 23:11:38,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1061 transitions, 23924 flow [2024-06-27 23:11:41,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1061 transitions, 22736 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-27 23:11:41,594 INFO L231 Difference]: Finished difference. Result has 386 places, 1005 transitions, 20959 flow [2024-06-27 23:11:41,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19571, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=687, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20959, PETRI_PLACES=386, PETRI_TRANSITIONS=1005} [2024-06-27 23:11:41,595 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-27 23:11:41,595 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1005 transitions, 20959 flow [2024-06-27 23:11:41,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:41,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:41,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:41,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:11:41,596 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:41,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 570759774, now seen corresponding path program 19 times [2024-06-27 23:11:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:41,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177068738] [2024-06-27 23:11:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:41,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:43,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:43,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177068738] [2024-06-27 23:11:43,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177068738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:43,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:43,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:11:43,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662527405] [2024-06-27 23:11:43,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:43,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:11:43,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:11:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:11:43,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:11:43,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1005 transitions, 20959 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:43,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:43,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:11:43,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:46,726 INFO L124 PetriNetUnfolderBase]: 6110/9643 cut-off events. [2024-06-27 23:11:46,726 INFO L125 PetriNetUnfolderBase]: For 981057/981060 co-relation queries the response was YES. [2024-06-27 23:11:46,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81467 conditions, 9643 events. 6110/9643 cut-off events. For 981057/981060 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 62291 event pairs, 1129 based on Foata normal form. 8/9648 useless extension candidates. Maximal degree in co-relation 81311. Up to 5232 conditions per place. [2024-06-27 23:11:46,871 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 386 selfloop transitions, 683 changer transitions 0/1074 dead transitions. [2024-06-27 23:11:46,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1074 transitions, 24445 flow [2024-06-27 23:11:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-27 23:11:46,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2024-06-27 23:11:46,882 INFO L175 Difference]: Start difference. First operand has 386 places, 1005 transitions, 20959 flow. Second operand 11 states and 238 transitions. [2024-06-27 23:11:46,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1074 transitions, 24445 flow [2024-06-27 23:11:50,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1074 transitions, 23259 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 23:11:50,285 INFO L231 Difference]: Finished difference. Result has 389 places, 1014 transitions, 21357 flow [2024-06-27 23:11:50,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19794, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21357, PETRI_PLACES=389, PETRI_TRANSITIONS=1014} [2024-06-27 23:11:50,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-27 23:11:50,286 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1014 transitions, 21357 flow [2024-06-27 23:11:50,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:50,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:50,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:50,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:11:50,287 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:50,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 578186661, now seen corresponding path program 1 times [2024-06-27 23:11:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:50,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886826789] [2024-06-27 23:11:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886826789] [2024-06-27 23:11:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886826789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:52,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:52,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:52,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696276054] [2024-06-27 23:11:52,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:52,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:11:52,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1014 transitions, 21357 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:52,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:52,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:11:52,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:54,929 INFO L124 PetriNetUnfolderBase]: 5747/9195 cut-off events. [2024-06-27 23:11:54,929 INFO L125 PetriNetUnfolderBase]: For 1047943/1047981 co-relation queries the response was YES. [2024-06-27 23:11:55,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78972 conditions, 9195 events. 5747/9195 cut-off events. For 1047943/1047981 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 60910 event pairs, 1632 based on Foata normal form. 38/9097 useless extension candidates. Maximal degree in co-relation 78815. Up to 7946 conditions per place. [2024-06-27 23:11:55,062 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 926 selfloop transitions, 70 changer transitions 0/1056 dead transitions. [2024-06-27 23:11:55,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1056 transitions, 23648 flow [2024-06-27 23:11:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 23:11:55,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 23:11:55,064 INFO L175 Difference]: Start difference. First operand has 389 places, 1014 transitions, 21357 flow. Second operand 10 states and 205 transitions. [2024-06-27 23:11:55,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1056 transitions, 23648 flow [2024-06-27 23:11:58,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1056 transitions, 22191 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:58,368 INFO L231 Difference]: Finished difference. Result has 391 places, 1021 transitions, 20206 flow [2024-06-27 23:11:58,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19906, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20206, PETRI_PLACES=391, PETRI_TRANSITIONS=1021} [2024-06-27 23:11:58,369 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-27 23:11:58,369 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1021 transitions, 20206 flow [2024-06-27 23:11:58,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:11:58,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:58,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:58,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:11:58,370 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:58,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:58,370 INFO L85 PathProgramCache]: Analyzing trace with hash 577909614, now seen corresponding path program 20 times [2024-06-27 23:11:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:58,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226737702] [2024-06-27 23:11:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:59,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226737702] [2024-06-27 23:11:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226737702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:59,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:11:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755726681] [2024-06-27 23:11:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:59,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:11:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:11:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:12:00,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:12:00,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1021 transitions, 20206 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:00,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:00,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:12:00,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:03,169 INFO L124 PetriNetUnfolderBase]: 6105/9647 cut-off events. [2024-06-27 23:12:03,169 INFO L125 PetriNetUnfolderBase]: For 993838/993841 co-relation queries the response was YES. [2024-06-27 23:12:03,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80011 conditions, 9647 events. 6105/9647 cut-off events. For 993838/993841 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 62448 event pairs, 1087 based on Foata normal form. 8/9652 useless extension candidates. Maximal degree in co-relation 79852. Up to 5241 conditions per place. [2024-06-27 23:12:03,298 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 339 selfloop transitions, 733 changer transitions 0/1077 dead transitions. [2024-06-27 23:12:03,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1077 transitions, 23194 flow [2024-06-27 23:12:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:12:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:12:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-27 23:12:03,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793388429752066 [2024-06-27 23:12:03,299 INFO L175 Difference]: Start difference. First operand has 391 places, 1021 transitions, 20206 flow. Second operand 11 states and 232 transitions. [2024-06-27 23:12:03,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1077 transitions, 23194 flow [2024-06-27 23:12:06,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1077 transitions, 22976 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 23:12:06,724 INFO L231 Difference]: Finished difference. Result has 395 places, 1021 transitions, 21471 flow [2024-06-27 23:12:06,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19988, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21471, PETRI_PLACES=395, PETRI_TRANSITIONS=1021} [2024-06-27 23:12:06,725 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-27 23:12:06,725 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1021 transitions, 21471 flow [2024-06-27 23:12:06,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:06,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:06,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:06,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:12:06,726 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:06,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1227831102, now seen corresponding path program 2 times [2024-06-27 23:12:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:06,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032068473] [2024-06-27 23:12:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:07,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:07,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032068473] [2024-06-27 23:12:07,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032068473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:07,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:07,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:12:07,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441054032] [2024-06-27 23:12:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:07,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:12:07,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:12:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:12:07,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:12:07,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1021 transitions, 21471 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:07,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:07,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:12:07,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:10,241 INFO L124 PetriNetUnfolderBase]: 5975/9474 cut-off events. [2024-06-27 23:12:10,241 INFO L125 PetriNetUnfolderBase]: For 1082390/1082585 co-relation queries the response was YES. [2024-06-27 23:12:10,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83171 conditions, 9474 events. 5975/9474 cut-off events. For 1082390/1082585 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 61883 event pairs, 1480 based on Foata normal form. 57/9462 useless extension candidates. Maximal degree in co-relation 83011. Up to 8414 conditions per place. [2024-06-27 23:12:10,392 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 903 selfloop transitions, 105 changer transitions 0/1050 dead transitions. [2024-06-27 23:12:10,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1050 transitions, 23660 flow [2024-06-27 23:12:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:12:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:12:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:12:10,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 23:12:10,394 INFO L175 Difference]: Start difference. First operand has 395 places, 1021 transitions, 21471 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:12:10,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1050 transitions, 23660 flow [2024-06-27 23:12:13,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1050 transitions, 22381 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:12:13,277 INFO L231 Difference]: Finished difference. Result has 395 places, 1029 transitions, 20529 flow [2024-06-27 23:12:13,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20192, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20529, PETRI_PLACES=395, PETRI_TRANSITIONS=1029} [2024-06-27 23:12:13,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-27 23:12:13,278 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1029 transitions, 20529 flow [2024-06-27 23:12:13,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:13,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:13,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:13,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:12:13,279 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:13,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:13,279 INFO L85 PathProgramCache]: Analyzing trace with hash 300532160, now seen corresponding path program 3 times [2024-06-27 23:12:13,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:13,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255571118] [2024-06-27 23:12:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:13,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:14,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255571118] [2024-06-27 23:12:14,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255571118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:14,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:14,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:12:14,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282801215] [2024-06-27 23:12:14,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:14,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:12:14,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:12:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:12:14,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:12:14,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1029 transitions, 20529 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:14,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:14,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:12:14,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:16,728 INFO L124 PetriNetUnfolderBase]: 5985/9493 cut-off events. [2024-06-27 23:12:16,728 INFO L125 PetriNetUnfolderBase]: For 1090602/1090809 co-relation queries the response was YES. [2024-06-27 23:12:16,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81542 conditions, 9493 events. 5985/9493 cut-off events. For 1090602/1090809 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 62040 event pairs, 1438 based on Foata normal form. 56/9476 useless extension candidates. Maximal degree in co-relation 81381. Up to 8384 conditions per place. [2024-06-27 23:12:16,886 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 897 selfloop transitions, 111 changer transitions 0/1050 dead transitions. [2024-06-27 23:12:16,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1050 transitions, 22665 flow [2024-06-27 23:12:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:12:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:12:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:12:16,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 23:12:16,888 INFO L175 Difference]: Start difference. First operand has 395 places, 1029 transitions, 20529 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:12:16,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1050 transitions, 22665 flow [2024-06-27 23:12:19,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1050 transitions, 22520 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 23:12:19,973 INFO L231 Difference]: Finished difference. Result has 399 places, 1032 transitions, 20671 flow [2024-06-27 23:12:19,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20384, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20671, PETRI_PLACES=399, PETRI_TRANSITIONS=1032} [2024-06-27 23:12:19,974 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-27 23:12:19,974 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 1032 transitions, 20671 flow [2024-06-27 23:12:19,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:19,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:19,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:19,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:12:19,975 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:19,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 327344525, now seen corresponding path program 1 times [2024-06-27 23:12:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:19,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199413904] [2024-06-27 23:12:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:19,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:21,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199413904] [2024-06-27 23:12:21,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199413904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:21,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:12:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085922054] [2024-06-27 23:12:21,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:21,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:12:21,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:12:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:12:21,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:12:21,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 1032 transitions, 20671 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:21,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:21,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:12:21,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:24,036 INFO L124 PetriNetUnfolderBase]: 5612/8976 cut-off events. [2024-06-27 23:12:24,036 INFO L125 PetriNetUnfolderBase]: For 1163691/1163959 co-relation queries the response was YES. [2024-06-27 23:12:24,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78777 conditions, 8976 events. 5612/8976 cut-off events. For 1163691/1163959 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59497 event pairs, 1534 based on Foata normal form. 101/8855 useless extension candidates. Maximal degree in co-relation 78616. Up to 7772 conditions per place. [2024-06-27 23:12:24,185 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 908 selfloop transitions, 45 changer transitions 0/1053 dead transitions. [2024-06-27 23:12:24,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1053 transitions, 22691 flow [2024-06-27 23:12:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:12:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:12:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:12:24,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:12:24,395 INFO L175 Difference]: Start difference. First operand has 399 places, 1032 transitions, 20671 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:12:24,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1053 transitions, 22691 flow [2024-06-27 23:12:27,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1053 transitions, 22430 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 23:12:27,023 INFO L231 Difference]: Finished difference. Result has 401 places, 1035 transitions, 20559 flow [2024-06-27 23:12:27,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20410, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1032, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=987, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20559, PETRI_PLACES=401, PETRI_TRANSITIONS=1035} [2024-06-27 23:12:27,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-27 23:12:27,024 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1035 transitions, 20559 flow [2024-06-27 23:12:27,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:27,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:27,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:27,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:12:27,024 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:27,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:27,025 INFO L85 PathProgramCache]: Analyzing trace with hash 199948668, now seen corresponding path program 21 times [2024-06-27 23:12:27,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:27,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970510726] [2024-06-27 23:12:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:27,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:28,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970510726] [2024-06-27 23:12:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970510726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:28,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:28,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:12:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135242426] [2024-06-27 23:12:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:12:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:28,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:12:28,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:12:28,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:12:28,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1035 transitions, 20559 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:28,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:28,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:12:28,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:31,944 INFO L124 PetriNetUnfolderBase]: 6185/9776 cut-off events. [2024-06-27 23:12:31,944 INFO L125 PetriNetUnfolderBase]: For 1056343/1056352 co-relation queries the response was YES. [2024-06-27 23:12:32,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82298 conditions, 9776 events. 6185/9776 cut-off events. For 1056343/1056352 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 63501 event pairs, 1370 based on Foata normal form. 6/9763 useless extension candidates. Maximal degree in co-relation 82136. Up to 8669 conditions per place. [2024-06-27 23:12:32,097 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 932 selfloop transitions, 139 changer transitions 0/1076 dead transitions. [2024-06-27 23:12:32,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1076 transitions, 22965 flow [2024-06-27 23:12:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:12:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:12:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 23:12:32,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42768595041322316 [2024-06-27 23:12:32,105 INFO L175 Difference]: Start difference. First operand has 401 places, 1035 transitions, 20559 flow. Second operand 11 states and 207 transitions. [2024-06-27 23:12:32,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1076 transitions, 22965 flow [2024-06-27 23:12:35,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1076 transitions, 22829 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 23:12:35,839 INFO L231 Difference]: Finished difference. Result has 407 places, 1047 transitions, 20921 flow [2024-06-27 23:12:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20423, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20921, PETRI_PLACES=407, PETRI_TRANSITIONS=1047} [2024-06-27 23:12:35,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-27 23:12:35,841 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1047 transitions, 20921 flow [2024-06-27 23:12:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:35,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:35,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:35,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:12:35,842 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:35,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash -796709636, now seen corresponding path program 22 times [2024-06-27 23:12:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:35,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921254903] [2024-06-27 23:12:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:37,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:37,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921254903] [2024-06-27 23:12:37,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921254903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:37,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:37,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:12:37,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7293123] [2024-06-27 23:12:37,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:37,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:12:37,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:12:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:12:37,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:12:37,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1047 transitions, 20921 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:37,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:37,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:12:37,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:40,664 INFO L124 PetriNetUnfolderBase]: 6557/10445 cut-off events. [2024-06-27 23:12:40,665 INFO L125 PetriNetUnfolderBase]: For 1111879/1111891 co-relation queries the response was YES. [2024-06-27 23:12:40,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86690 conditions, 10445 events. 6557/10445 cut-off events. For 1111879/1111891 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 69742 event pairs, 1517 based on Foata normal form. 6/10372 useless extension candidates. Maximal degree in co-relation 86527. Up to 5663 conditions per place. [2024-06-27 23:12:40,864 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 376 selfloop transitions, 792 changer transitions 0/1173 dead transitions. [2024-06-27 23:12:40,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1173 transitions, 25272 flow [2024-06-27 23:12:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:12:40,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 23:12:40,866 INFO L175 Difference]: Start difference. First operand has 407 places, 1047 transitions, 20921 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:12:40,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1173 transitions, 25272 flow [2024-06-27 23:12:45,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 1173 transitions, 24951 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 23:12:45,036 INFO L231 Difference]: Finished difference. Result has 406 places, 1127 transitions, 23390 flow [2024-06-27 23:12:45,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20600, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=712, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23390, PETRI_PLACES=406, PETRI_TRANSITIONS=1127} [2024-06-27 23:12:45,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-27 23:12:45,038 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1127 transitions, 23390 flow [2024-06-27 23:12:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:45,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:45,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:45,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:12:45,038 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:45,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash -796715216, now seen corresponding path program 23 times [2024-06-27 23:12:45,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:45,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375240826] [2024-06-27 23:12:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:45,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:46,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:46,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375240826] [2024-06-27 23:12:46,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375240826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:46,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:46,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:12:46,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12755757] [2024-06-27 23:12:46,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:46,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:12:46,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:46,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:12:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:12:46,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:12:46,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1127 transitions, 23390 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:46,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:46,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:12:46,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:50,184 INFO L124 PetriNetUnfolderBase]: 6541/10423 cut-off events. [2024-06-27 23:12:50,184 INFO L125 PetriNetUnfolderBase]: For 1136751/1136763 co-relation queries the response was YES. [2024-06-27 23:12:50,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89252 conditions, 10423 events. 6541/10423 cut-off events. For 1136751/1136763 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 69517 event pairs, 1520 based on Foata normal form. 6/10350 useless extension candidates. Maximal degree in co-relation 89088. Up to 5650 conditions per place. [2024-06-27 23:12:50,346 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 378 selfloop transitions, 787 changer transitions 0/1170 dead transitions. [2024-06-27 23:12:50,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1170 transitions, 26270 flow [2024-06-27 23:12:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:12:50,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 23:12:50,348 INFO L175 Difference]: Start difference. First operand has 406 places, 1127 transitions, 23390 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:12:50,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1170 transitions, 26270 flow [2024-06-27 23:12:55,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 1170 transitions, 25282 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 23:12:55,056 INFO L231 Difference]: Finished difference. Result has 412 places, 1127 transitions, 23999 flow [2024-06-27 23:12:55,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=22402, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23999, PETRI_PLACES=412, PETRI_TRANSITIONS=1127} [2024-06-27 23:12:55,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-27 23:12:55,057 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1127 transitions, 23999 flow [2024-06-27 23:12:55,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:55,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:55,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:55,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:12:55,058 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:55,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1740863516, now seen corresponding path program 24 times [2024-06-27 23:12:55,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:55,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329086806] [2024-06-27 23:12:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:55,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:56,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329086806] [2024-06-27 23:12:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329086806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:56,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:12:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635988753] [2024-06-27 23:12:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:56,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:12:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:12:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:12:56,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:12:56,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1127 transitions, 23999 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:12:56,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:56,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:12:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:59,956 INFO L124 PetriNetUnfolderBase]: 6688/10669 cut-off events. [2024-06-27 23:12:59,956 INFO L125 PetriNetUnfolderBase]: For 1217958/1217970 co-relation queries the response was YES. [2024-06-27 23:13:00,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91915 conditions, 10669 events. 6688/10669 cut-off events. For 1217958/1217970 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 71639 event pairs, 1627 based on Foata normal form. 8/10598 useless extension candidates. Maximal degree in co-relation 91749. Up to 5775 conditions per place. [2024-06-27 23:13:00,142 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 397 selfloop transitions, 798 changer transitions 0/1200 dead transitions. [2024-06-27 23:13:00,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1200 transitions, 27935 flow [2024-06-27 23:13:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:13:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:13:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:13:00,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 23:13:00,144 INFO L175 Difference]: Start difference. First operand has 412 places, 1127 transitions, 23999 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:13:00,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1200 transitions, 27935 flow [2024-06-27 23:13:04,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1200 transitions, 26348 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:13:04,343 INFO L231 Difference]: Finished difference. Result has 416 places, 1154 transitions, 24695 flow [2024-06-27 23:13:04,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=22436, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=771, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24695, PETRI_PLACES=416, PETRI_TRANSITIONS=1154} [2024-06-27 23:13:04,344 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-27 23:13:04,344 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1154 transitions, 24695 flow [2024-06-27 23:13:04,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:04,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:04,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:04,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:13:04,345 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:04,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:04,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1822517148, now seen corresponding path program 25 times [2024-06-27 23:13:04,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:04,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912365119] [2024-06-27 23:13:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:04,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:06,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:06,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912365119] [2024-06-27 23:13:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912365119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:06,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:06,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:13:06,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022866189] [2024-06-27 23:13:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:06,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:13:06,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:06,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:13:06,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:13:06,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:13:06,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1154 transitions, 24695 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:06,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:06,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:13:06,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:09,366 INFO L124 PetriNetUnfolderBase]: 6738/10759 cut-off events. [2024-06-27 23:13:09,366 INFO L125 PetriNetUnfolderBase]: For 1246476/1246488 co-relation queries the response was YES. [2024-06-27 23:13:09,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93119 conditions, 10759 events. 6738/10759 cut-off events. For 1246476/1246488 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 72496 event pairs, 1628 based on Foata normal form. 8/10688 useless extension candidates. Maximal degree in co-relation 92950. Up to 5820 conditions per place. [2024-06-27 23:13:09,551 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 413 selfloop transitions, 793 changer transitions 0/1211 dead transitions. [2024-06-27 23:13:09,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1211 transitions, 28330 flow [2024-06-27 23:13:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:13:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:13:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 23:13:09,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-06-27 23:13:09,553 INFO L175 Difference]: Start difference. First operand has 416 places, 1154 transitions, 24695 flow. Second operand 10 states and 219 transitions. [2024-06-27 23:13:09,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1211 transitions, 28330 flow [2024-06-27 23:13:14,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1211 transitions, 27026 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 23:13:14,436 INFO L231 Difference]: Finished difference. Result has 421 places, 1163 transitions, 25217 flow [2024-06-27 23:13:14,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=23412, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=25217, PETRI_PLACES=421, PETRI_TRANSITIONS=1163} [2024-06-27 23:13:14,437 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-27 23:13:14,437 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1163 transitions, 25217 flow [2024-06-27 23:13:14,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:14,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:14,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:14,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:13:14,438 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:14,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1822511568, now seen corresponding path program 26 times [2024-06-27 23:13:14,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:14,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146924138] [2024-06-27 23:13:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:14,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:16,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146924138] [2024-06-27 23:13:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146924138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:16,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:16,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:13:16,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461511406] [2024-06-27 23:13:16,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:16,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:13:16,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:13:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:13:16,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:13:16,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1163 transitions, 25217 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:16,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:16,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:13:16,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:19,631 INFO L124 PetriNetUnfolderBase]: 6716/10729 cut-off events. [2024-06-27 23:13:19,631 INFO L125 PetriNetUnfolderBase]: For 1255380/1255392 co-relation queries the response was YES. [2024-06-27 23:13:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92554 conditions, 10729 events. 6716/10729 cut-off events. For 1255380/1255392 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 72279 event pairs, 1626 based on Foata normal form. 8/10658 useless extension candidates. Maximal degree in co-relation 92384. Up to 5802 conditions per place. [2024-06-27 23:13:19,788 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 402 selfloop transitions, 800 changer transitions 0/1207 dead transitions. [2024-06-27 23:13:19,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1207 transitions, 28269 flow [2024-06-27 23:13:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:13:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:13:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:13:19,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 23:13:19,790 INFO L175 Difference]: Start difference. First operand has 421 places, 1163 transitions, 25217 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:13:19,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1207 transitions, 28269 flow [2024-06-27 23:13:24,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1207 transitions, 26495 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-27 23:13:24,664 INFO L231 Difference]: Finished difference. Result has 424 places, 1163 transitions, 25065 flow [2024-06-27 23:13:24,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=23443, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=25065, PETRI_PLACES=424, PETRI_TRANSITIONS=1163} [2024-06-27 23:13:24,665 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-27 23:13:24,666 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1163 transitions, 25065 flow [2024-06-27 23:13:24,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:24,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:24,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:13:24,667 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:24,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1420236434, now seen corresponding path program 27 times [2024-06-27 23:13:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:24,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920443815] [2024-06-27 23:13:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:24,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920443815] [2024-06-27 23:13:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920443815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:26,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:26,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:13:26,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389968858] [2024-06-27 23:13:26,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:13:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:13:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:13:26,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:13:26,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1163 transitions, 25065 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:26,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:26,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:13:26,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:29,983 INFO L124 PetriNetUnfolderBase]: 6904/11044 cut-off events. [2024-06-27 23:13:29,983 INFO L125 PetriNetUnfolderBase]: For 1331462/1331474 co-relation queries the response was YES. [2024-06-27 23:13:30,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95608 conditions, 11044 events. 6904/11044 cut-off events. For 1331462/1331474 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 74931 event pairs, 1739 based on Foata normal form. 10/10975 useless extension candidates. Maximal degree in co-relation 95437. Up to 5963 conditions per place. [2024-06-27 23:13:30,161 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 406 selfloop transitions, 834 changer transitions 0/1245 dead transitions. [2024-06-27 23:13:30,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1245 transitions, 29434 flow [2024-06-27 23:13:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:13:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:13:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 23:13:30,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-27 23:13:30,163 INFO L175 Difference]: Start difference. First operand has 424 places, 1163 transitions, 25065 flow. Second operand 10 states and 218 transitions. [2024-06-27 23:13:30,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1245 transitions, 29434 flow [2024-06-27 23:13:35,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1245 transitions, 27798 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:13:35,066 INFO L231 Difference]: Finished difference. Result has 427 places, 1197 transitions, 25992 flow [2024-06-27 23:13:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=25992, PETRI_PLACES=427, PETRI_TRANSITIONS=1197} [2024-06-27 23:13:35,067 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 382 predicate places. [2024-06-27 23:13:35,067 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 1197 transitions, 25992 flow [2024-06-27 23:13:35,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:35,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:35,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:13:35,069 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:35,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1412602157, now seen corresponding path program 2 times [2024-06-27 23:13:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:35,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638414250] [2024-06-27 23:13:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:37,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638414250] [2024-06-27 23:13:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638414250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:37,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115329081] [2024-06-27 23:13:37,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:37,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:37,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:13:37,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1197 transitions, 25992 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:37,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:37,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:13:37,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:41,074 INFO L124 PetriNetUnfolderBase]: 6558/10599 cut-off events. [2024-06-27 23:13:41,074 INFO L125 PetriNetUnfolderBase]: For 1403266/1403308 co-relation queries the response was YES. [2024-06-27 23:13:41,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92922 conditions, 10599 events. 6558/10599 cut-off events. For 1403266/1403308 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 73471 event pairs, 1837 based on Foata normal form. 41/10491 useless extension candidates. Maximal degree in co-relation 92749. Up to 9082 conditions per place. [2024-06-27 23:13:41,339 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 1097 selfloop transitions, 75 changer transitions 0/1235 dead transitions. [2024-06-27 23:13:41,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1235 transitions, 28664 flow [2024-06-27 23:13:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:13:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:13:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:13:41,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 23:13:41,341 INFO L175 Difference]: Start difference. First operand has 427 places, 1197 transitions, 25992 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:13:41,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1235 transitions, 28664 flow [2024-06-27 23:13:46,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1235 transitions, 26992 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:46,847 INFO L231 Difference]: Finished difference. Result has 432 places, 1207 transitions, 24670 flow [2024-06-27 23:13:46,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=24328, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24670, PETRI_PLACES=432, PETRI_TRANSITIONS=1207} [2024-06-27 23:13:46,848 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-27 23:13:46,849 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1207 transitions, 24670 flow [2024-06-27 23:13:46,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:46,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:46,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:46,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:13:46,849 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:46,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1420230854, now seen corresponding path program 28 times [2024-06-27 23:13:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:46,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146405069] [2024-06-27 23:13:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:48,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:48,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146405069] [2024-06-27 23:13:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146405069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:48,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:48,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:13:48,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258837224] [2024-06-27 23:13:48,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:48,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:13:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:13:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:13:48,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:13:48,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1207 transitions, 24670 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:48,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:48,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:13:48,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:52,646 INFO L124 PetriNetUnfolderBase]: 6996/11213 cut-off events. [2024-06-27 23:13:52,646 INFO L125 PetriNetUnfolderBase]: For 1366895/1366907 co-relation queries the response was YES. [2024-06-27 23:13:52,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95215 conditions, 11213 events. 6996/11213 cut-off events. For 1366895/1366907 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 76567 event pairs, 1737 based on Foata normal form. 10/11144 useless extension candidates. Maximal degree in co-relation 95040. Up to 6065 conditions per place. [2024-06-27 23:13:52,844 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 426 selfloop transitions, 837 changer transitions 0/1268 dead transitions. [2024-06-27 23:13:52,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1268 transitions, 28610 flow [2024-06-27 23:13:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:13:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:13:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 23:13:52,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-06-27 23:13:52,846 INFO L175 Difference]: Start difference. First operand has 432 places, 1207 transitions, 24670 flow. Second operand 10 states and 219 transitions. [2024-06-27 23:13:52,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1268 transitions, 28610 flow [2024-06-27 23:13:58,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1268 transitions, 28435 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:58,586 INFO L231 Difference]: Finished difference. Result has 436 places, 1219 transitions, 26459 flow [2024-06-27 23:13:58,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=24495, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=825, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=26459, PETRI_PLACES=436, PETRI_TRANSITIONS=1219} [2024-06-27 23:13:58,588 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-27 23:13:58,588 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1219 transitions, 26459 flow [2024-06-27 23:13:58,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:13:58,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:58,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:58,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:13:58,589 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:58,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash 466189892, now seen corresponding path program 29 times [2024-06-27 23:13:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:58,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910530466] [2024-06-27 23:13:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:58,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:00,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:00,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910530466] [2024-06-27 23:14:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910530466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:00,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:00,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9784522] [2024-06-27 23:14:00,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:00,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:00,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:00,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:14:00,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1219 transitions, 26459 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:00,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:00,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:14:00,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:04,829 INFO L124 PetriNetUnfolderBase]: 7060/11329 cut-off events. [2024-06-27 23:14:04,829 INFO L125 PetriNetUnfolderBase]: For 1427033/1427045 co-relation queries the response was YES. [2024-06-27 23:14:04,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99269 conditions, 11329 events. 7060/11329 cut-off events. For 1427033/1427045 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 77691 event pairs, 1800 based on Foata normal form. 10/11260 useless extension candidates. Maximal degree in co-relation 99093. Up to 6123 conditions per place. [2024-06-27 23:14:05,011 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 432 selfloop transitions, 845 changer transitions 0/1282 dead transitions. [2024-06-27 23:14:05,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1282 transitions, 30520 flow [2024-06-27 23:14:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:14:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:14:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 23:14:05,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:14:05,013 INFO L175 Difference]: Start difference. First operand has 436 places, 1219 transitions, 26459 flow. Second operand 10 states and 220 transitions. [2024-06-27 23:14:05,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1282 transitions, 30520 flow [2024-06-27 23:14:10,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1282 transitions, 28963 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:14:10,439 INFO L231 Difference]: Finished difference. Result has 439 places, 1231 transitions, 26906 flow [2024-06-27 23:14:10,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=24914, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=833, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=26906, PETRI_PLACES=439, PETRI_TRANSITIONS=1231} [2024-06-27 23:14:10,440 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-27 23:14:10,440 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1231 transitions, 26906 flow [2024-06-27 23:14:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:10,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:10,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:10,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:14:10,441 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:10,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1412879204, now seen corresponding path program 30 times [2024-06-27 23:14:10,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:10,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983768180] [2024-06-27 23:14:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:12,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:12,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983768180] [2024-06-27 23:14:12,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983768180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:12,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:12,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:14:12,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747304393] [2024-06-27 23:14:12,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:12,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:14:12,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:12,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:14:12,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:14:12,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 23:14:12,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1231 transitions, 26906 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:12,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:12,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 23:14:12,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:16,456 INFO L124 PetriNetUnfolderBase]: 7032/11283 cut-off events. [2024-06-27 23:14:16,456 INFO L125 PetriNetUnfolderBase]: For 1422488/1422500 co-relation queries the response was YES. [2024-06-27 23:14:16,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98421 conditions, 11283 events. 7032/11283 cut-off events. For 1422488/1422500 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 77366 event pairs, 1752 based on Foata normal form. 10/11214 useless extension candidates. Maximal degree in co-relation 98245. Up to 6100 conditions per place. [2024-06-27 23:14:16,626 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 401 selfloop transitions, 869 changer transitions 0/1275 dead transitions. [2024-06-27 23:14:16,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1275 transitions, 30209 flow [2024-06-27 23:14:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:14:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:14:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 23:14:16,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 23:14:16,628 INFO L175 Difference]: Start difference. First operand has 439 places, 1231 transitions, 26906 flow. Second operand 10 states and 214 transitions. [2024-06-27 23:14:16,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1275 transitions, 30209 flow [2024-06-27 23:14:23,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1275 transitions, 28041 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-27 23:14:23,366 INFO L231 Difference]: Finished difference. Result has 440 places, 1231 transitions, 26500 flow [2024-06-27 23:14:23,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=24738, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=26500, PETRI_PLACES=440, PETRI_TRANSITIONS=1231} [2024-06-27 23:14:23,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-27 23:14:23,367 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 1231 transitions, 26500 flow [2024-06-27 23:14:23,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:23,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:23,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:23,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:14:23,368 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:23,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1076859666, now seen corresponding path program 4 times [2024-06-27 23:14:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:23,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574106907] [2024-06-27 23:14:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:23,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:24,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:24,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574106907] [2024-06-27 23:14:24,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574106907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:24,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:24,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:14:24,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424644791] [2024-06-27 23:14:24,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:24,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:14:24,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:24,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:14:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:14:24,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:14:24,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1231 transitions, 26500 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:24,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:24,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:14:24,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:28,055 INFO L124 PetriNetUnfolderBase]: 6882/11080 cut-off events. [2024-06-27 23:14:28,056 INFO L125 PetriNetUnfolderBase]: For 1399099/1399157 co-relation queries the response was YES. [2024-06-27 23:14:28,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96832 conditions, 11080 events. 6882/11080 cut-off events. For 1399099/1399157 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 76207 event pairs, 1463 based on Foata normal form. 47/11070 useless extension candidates. Maximal degree in co-relation 96655. Up to 9703 conditions per place. [2024-06-27 23:14:28,222 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 1108 selfloop transitions, 105 changer transitions 0/1255 dead transitions. [2024-06-27 23:14:28,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1255 transitions, 29078 flow [2024-06-27 23:14:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:14:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:14:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:14:28,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 23:14:28,224 INFO L175 Difference]: Start difference. First operand has 440 places, 1231 transitions, 26500 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:14:28,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1255 transitions, 29078 flow [2024-06-27 23:14:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1255 transitions, 27461 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 23:14:33,237 INFO L231 Difference]: Finished difference. Result has 441 places, 1240 transitions, 25236 flow [2024-06-27 23:14:33,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=24883, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25236, PETRI_PLACES=441, PETRI_TRANSITIONS=1240} [2024-06-27 23:14:33,238 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 396 predicate places. [2024-06-27 23:14:33,238 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1240 transitions, 25236 flow [2024-06-27 23:14:33,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:33,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:33,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:33,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:14:33,239 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:33,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1076471391, now seen corresponding path program 2 times [2024-06-27 23:14:33,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:33,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271979926] [2024-06-27 23:14:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:33,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:35,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271979926] [2024-06-27 23:14:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271979926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:35,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:35,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:14:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886018435] [2024-06-27 23:14:35,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:14:35,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:14:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:14:35,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:14:35,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1240 transitions, 25236 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:14:35,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:35,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:14:35,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand