./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 --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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 22:01:08,441 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 22:01:08,516 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 22:01:08,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 22:01:08,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 22:01:08,561 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 22:01:08,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 22:01:08,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 22:01:08,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 22:01:08,568 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 22:01:08,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 22:01:08,569 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 22:01:08,570 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 22:01:08,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 22:01:08,572 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 22:01:08,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 22:01:08,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 22:01:08,573 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 22:01:08,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 22:01:08,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 22:01:08,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 22:01:08,574 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 22:01:08,574 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 22:01:08,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 22:01:08,575 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 22:01:08,575 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 22:01:08,575 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 22:01:08,576 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 22:01:08,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 22:01:08,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 22:01:08,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 22:01:08,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 22:01:08,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:01:08,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 22:01:08,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 22:01:08,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 22:01:08,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 22:01:08,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 22:01:08,580 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 22:01:08,580 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 22:01:08,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 22:01:08,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 22:01:08,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 22:01:08,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 22:01:08,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 22:01:08,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 22:01:08,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 22:01:08,838 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 22:01:08,839 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 22:01:08,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 22:01:10,089 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 22:01:10,346 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 22:01:10,347 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 22:01:10,363 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb4abce65/25f4429afef047be92e52ba312d974c1/FLAGe11b20316 [2024-06-27 22:01:10,375 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb4abce65/25f4429afef047be92e52ba312d974c1 [2024-06-27 22:01:10,377 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 22:01:10,378 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 22:01:10,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix002.opt.yml/witness.yml [2024-06-27 22:01:10,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 22:01:10,473 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 22:01:10,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 22:01:10,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 22:01:10,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 22:01:10,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:01:10" (1/2) ... [2024-06-27 22:01:10,481 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b1164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:01:10, skipping insertion in model container [2024-06-27 22:01:10,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:01:10" (1/2) ... [2024-06-27 22:01:10,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6cf478a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:01:10, skipping insertion in model container [2024-06-27 22:01:10,483 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:01:10" (2/2) ... [2024-06-27 22:01:10,485 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b1164 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:01:10, skipping insertion in model container [2024-06-27 22:01:10,485 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:01:10" (2/2) ... [2024-06-27 22:01:10,485 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 22:01:10,509 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 22:01:10,510 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 22:01:10,511 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 22:01:10,511 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 22:01:10,511 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 22:01:10,511 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-27 22:01:10,566 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 22:01:10,759 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i[944,957] [2024-06-27 22:01:10,978 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:01:10,989 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 22:01:11,019 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 22:01:11,140 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:01:11,187 INFO L206 MainTranslator]: Completed translation [2024-06-27 22:01:11,188 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:01:11 WrapperNode [2024-06-27 22:01:11,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 22:01:11,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 22:01:11,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 22:01:11,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 22:01:11,196 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,230 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,262 INFO L138 Inliner]: procedures = 175, calls = 50, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 148 [2024-06-27 22:01:11,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 22:01:11,264 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 22:01:11,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 22:01:11,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 22:01:11,274 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,275 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,278 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,307 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 22:01:11,308 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,308 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,322 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,329 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,332 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,340 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 22:01:11,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 22:01:11,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 22:01:11,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 22:01:11,349 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 10:01:11" (1/1) ... [2024-06-27 22:01:11,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:01:11,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:01:11,381 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 22:01:11,387 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 22:01:11,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 22:01:11,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 22:01:11,415 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 22:01:11,416 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 22:01:11,416 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 22:01:11,416 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 22:01:11,416 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 22:01:11,417 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 22:01:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 22:01:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 22:01:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 22:01:11,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 22:01:11,419 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 22:01:11,550 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 22:01:11,552 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 22:01:11,961 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 22:01:11,961 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 22:01:12,179 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 22:01:12,179 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 22:01:12,180 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:01:12 BoogieIcfgContainer [2024-06-27 22:01:12,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 22:01:12,184 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 22:01:12,184 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 22:01:12,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 22:01:12,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 10:01:10" (1/4) ... [2024-06-27 22:01:12,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8a7e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 10:01:12, skipping insertion in model container [2024-06-27 22:01:12,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:01:10" (2/4) ... [2024-06-27 22:01:12,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8a7e74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:01:12, skipping insertion in model container [2024-06-27 22:01:12,188 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 10:01:11" (3/4) ... [2024-06-27 22:01:12,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8a7e74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:01:12, skipping insertion in model container [2024-06-27 22:01:12,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:01:12" (4/4) ... [2024-06-27 22:01:12,192 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.opt.i [2024-06-27 22:01:12,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 22:01:12,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 22:01:12,209 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 22:01:12,261 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 22:01:12,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 22:01:12,331 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-06-27 22:01:12,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:01:12,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2024-06-27 22:01:12,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 22:01:12,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-06-27 22:01:12,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 22:01:12,404 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;@3d636c6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 22:01:12,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 22:01:12,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 22:01:12,410 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 22:01:12,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:01:12,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:12,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 22:01:12,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:12,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:12,428 INFO L85 PathProgramCache]: Analyzing trace with hash 374670426, now seen corresponding path program 1 times [2024-06-27 22:01:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:12,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430925755] [2024-06-27 22:01:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430925755] [2024-06-27 22:01:14,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430925755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:14,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:14,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 22:01:14,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855701432] [2024-06-27 22:01:14,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:14,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:01:14,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:01:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:01:14,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-27 22:01:14,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:14,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:14,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-27 22:01:14,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:15,090 INFO L124 PetriNetUnfolderBase]: 3642/6097 cut-off events. [2024-06-27 22:01:15,090 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 22:01:15,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11423 conditions, 6097 events. 3642/6097 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 41495 event pairs, 3038 based on Foata normal form. 180/5800 useless extension candidates. Maximal degree in co-relation 11411. Up to 5235 conditions per place. [2024-06-27 22:01:15,145 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 41 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-06-27 22:01:15,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 225 flow [2024-06-27 22:01:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:01:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:01:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-27 22:01:15,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-06-27 22:01:15,160 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 105 transitions. [2024-06-27 22:01:15,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 225 flow [2024-06-27 22:01:15,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 22:01:15,170 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 130 flow [2024-06-27 22:01:15,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 22:01:15,177 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-06-27 22:01:15,177 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 130 flow [2024-06-27 22:01:15,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:15,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:15,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:15,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 22:01:15,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:15,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:15,179 INFO L85 PathProgramCache]: Analyzing trace with hash -718942919, now seen corresponding path program 1 times [2024-06-27 22:01:15,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:15,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932775877] [2024-06-27 22:01:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:15,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:16,640 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 22:01:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932775877] [2024-06-27 22:01:16,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932775877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:16,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:16,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:01:16,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142809388] [2024-06-27 22:01:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:16,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:01:16,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:01:16,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:01:16,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-27 22:01:16,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:16,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:16,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-27 22:01:16,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:17,602 INFO L124 PetriNetUnfolderBase]: 4139/6157 cut-off events. [2024-06-27 22:01:17,603 INFO L125 PetriNetUnfolderBase]: For 881/885 co-relation queries the response was YES. [2024-06-27 22:01:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13515 conditions, 6157 events. 4139/6157 cut-off events. For 881/885 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 36674 event pairs, 2348 based on Foata normal form. 5/5916 useless extension candidates. Maximal degree in co-relation 13503. Up to 5909 conditions per place. [2024-06-27 22:01:17,646 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-06-27 22:01:17,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 312 flow [2024-06-27 22:01:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:01:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:01:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-27 22:01:17,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-27 22:01:17,649 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 130 flow. Second operand 4 states and 132 transitions. [2024-06-27 22:01:17,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 312 flow [2024-06-27 22:01:17,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:01:17,651 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 168 flow [2024-06-27 22:01:17,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-27 22:01:17,652 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-06-27 22:01:17,653 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 168 flow [2024-06-27 22:01:17,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:17,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:17,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:17,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 22:01:17,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:17,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash -812392993, now seen corresponding path program 1 times [2024-06-27 22:01:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:17,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012520620] [2024-06-27 22:01:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:19,234 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 22:01:19,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012520620] [2024-06-27 22:01:19,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012520620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:19,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:19,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:01:19,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344609324] [2024-06-27 22:01:19,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:19,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:01:19,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:19,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:01:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:01:19,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 22:01:19,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:19,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:19,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 22:01:19,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:20,251 INFO L124 PetriNetUnfolderBase]: 4862/7741 cut-off events. [2024-06-27 22:01:20,252 INFO L125 PetriNetUnfolderBase]: For 2775/2783 co-relation queries the response was YES. [2024-06-27 22:01:20,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17760 conditions, 7741 events. 4862/7741 cut-off events. For 2775/2783 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 50364 event pairs, 2852 based on Foata normal form. 7/7274 useless extension candidates. Maximal degree in co-relation 17746. Up to 6903 conditions per place. [2024-06-27 22:01:20,310 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 65 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-06-27 22:01:20,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 410 flow [2024-06-27 22:01:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:01:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:01:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 22:01:20,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636 [2024-06-27 22:01:20,317 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 168 flow. Second operand 5 states and 159 transitions. [2024-06-27 22:01:20,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 410 flow [2024-06-27 22:01:20,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 396 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 22:01:20,323 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 206 flow [2024-06-27 22:01:20,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-06-27 22:01:20,325 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-27 22:01:20,325 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 206 flow [2024-06-27 22:01:20,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:20,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:20,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:20,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 22:01:20,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:20,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash 751855820, now seen corresponding path program 1 times [2024-06-27 22:01:20,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:20,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101694711] [2024-06-27 22:01:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:20,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:22,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101694711] [2024-06-27 22:01:22,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101694711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:22,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:22,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:01:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590858818] [2024-06-27 22:01:22,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:22,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:01:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:01:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:01:22,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 22:01:22,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 22:01:22,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:22,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 22:01:22,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:23,539 INFO L124 PetriNetUnfolderBase]: 4836/7935 cut-off events. [2024-06-27 22:01:23,540 INFO L125 PetriNetUnfolderBase]: For 5371/5379 co-relation queries the response was YES. [2024-06-27 22:01:23,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19313 conditions, 7935 events. 4836/7935 cut-off events. For 5371/5379 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 53850 event pairs, 3097 based on Foata normal form. 7/7443 useless extension candidates. Maximal degree in co-relation 19298. Up to 6844 conditions per place. [2024-06-27 22:01:23,579 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 76 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2024-06-27 22:01:23,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 102 transitions, 506 flow [2024-06-27 22:01:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:01:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:01:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 22:01:23,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-27 22:01:23,581 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 206 flow. Second operand 6 states and 189 transitions. [2024-06-27 22:01:23,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 102 transitions, 506 flow [2024-06-27 22:01:23,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 22:01:23,588 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 244 flow [2024-06-27 22:01:23,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-06-27 22:01:23,589 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-06-27 22:01:23,590 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 244 flow [2024-06-27 22:01:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 22:01:23,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:23,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:23,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 22:01:23,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:23,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash 974415134, now seen corresponding path program 1 times [2024-06-27 22:01:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:23,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959737674] [2024-06-27 22:01:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:25,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:25,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959737674] [2024-06-27 22:01:25,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959737674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:25,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:25,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:01:25,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996581592] [2024-06-27 22:01:25,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:01:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:01:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:01:25,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 22:01:25,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:25,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:25,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 22:01:25,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:27,087 INFO L124 PetriNetUnfolderBase]: 5780/8406 cut-off events. [2024-06-27 22:01:27,088 INFO L125 PetriNetUnfolderBase]: For 8816/8819 co-relation queries the response was YES. [2024-06-27 22:01:27,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23175 conditions, 8406 events. 5780/8406 cut-off events. For 8816/8819 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 49365 event pairs, 1798 based on Foata normal form. 7/8176 useless extension candidates. Maximal degree in co-relation 23159. Up to 8010 conditions per place. [2024-06-27 22:01:27,139 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 94 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-27 22:01:27,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 126 transitions, 676 flow [2024-06-27 22:01:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:01:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:01:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-27 22:01:27,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342857142857142 [2024-06-27 22:01:27,141 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 244 flow. Second operand 7 states and 222 transitions. [2024-06-27 22:01:27,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 126 transitions, 676 flow [2024-06-27 22:01:27,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 126 transitions, 642 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 22:01:27,153 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 327 flow [2024-06-27 22:01:27,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2024-06-27 22:01:27,156 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 22:01:27,160 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 327 flow [2024-06-27 22:01:27,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:27,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:27,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 22:01:27,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:27,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:27,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2011073385, now seen corresponding path program 1 times [2024-06-27 22:01:27,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:27,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145133233] [2024-06-27 22:01:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:28,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:28,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145133233] [2024-06-27 22:01:28,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145133233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:28,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:28,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:01:28,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133600088] [2024-06-27 22:01:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:28,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:01:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:01:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:01:28,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 22:01:28,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 22:01:28,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:28,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 22:01:28,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:30,057 INFO L124 PetriNetUnfolderBase]: 5486/8356 cut-off events. [2024-06-27 22:01:30,057 INFO L125 PetriNetUnfolderBase]: For 16495/16531 co-relation queries the response was YES. [2024-06-27 22:01:30,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24731 conditions, 8356 events. 5486/8356 cut-off events. For 16495/16531 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 51418 event pairs, 1909 based on Foata normal form. 42/8382 useless extension candidates. Maximal degree in co-relation 24712. Up to 7710 conditions per place. [2024-06-27 22:01:30,114 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 84 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2024-06-27 22:01:30,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 675 flow [2024-06-27 22:01:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:01:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:01:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 22:01:30,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514285714285714 [2024-06-27 22:01:30,116 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 327 flow. Second operand 7 states and 193 transitions. [2024-06-27 22:01:30,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 675 flow [2024-06-27 22:01:30,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 642 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 22:01:30,125 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 427 flow [2024-06-27 22:01:30,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-27 22:01:30,126 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-27 22:01:30,126 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 427 flow [2024-06-27 22:01:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 22:01:30,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:30,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:30,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 22:01:30,127 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:30,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash 110108765, now seen corresponding path program 1 times [2024-06-27 22:01:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:30,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399910915] [2024-06-27 22:01:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:30,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:32,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:32,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399910915] [2024-06-27 22:01:32,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399910915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:32,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:32,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:01:32,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410241359] [2024-06-27 22:01:32,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:32,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:01:32,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:01:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:01:32,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 22:01:32,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 427 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:32,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:32,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 22:01:32,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:33,676 INFO L124 PetriNetUnfolderBase]: 5759/8359 cut-off events. [2024-06-27 22:01:33,676 INFO L125 PetriNetUnfolderBase]: For 24546/24557 co-relation queries the response was YES. [2024-06-27 22:01:33,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27446 conditions, 8359 events. 5759/8359 cut-off events. For 24546/24557 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 48455 event pairs, 1317 based on Foata normal form. 41/8392 useless extension candidates. Maximal degree in co-relation 27421. Up to 7901 conditions per place. [2024-06-27 22:01:33,747 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 108 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-27 22:01:33,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 146 transitions, 919 flow [2024-06-27 22:01:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:01:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:01:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 247 transitions. [2024-06-27 22:01:33,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-27 22:01:33,750 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 427 flow. Second operand 8 states and 247 transitions. [2024-06-27 22:01:33,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 146 transitions, 919 flow [2024-06-27 22:01:33,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 892 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 22:01:33,815 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 488 flow [2024-06-27 22:01:33,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=488, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2024-06-27 22:01:33,815 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-27 22:01:33,816 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 488 flow [2024-06-27 22:01:33,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:33,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:33,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:33,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 22:01:33,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:33,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash -794929766, now seen corresponding path program 1 times [2024-06-27 22:01:33,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:33,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792354825] [2024-06-27 22:01:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:33,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792354825] [2024-06-27 22:01:35,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792354825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:01:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750336278] [2024-06-27 22:01:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:35,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:01:35,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:01:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:01:35,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 22:01:35,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:35,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:35,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 22:01:35,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:37,134 INFO L124 PetriNetUnfolderBase]: 6577/9659 cut-off events. [2024-06-27 22:01:37,135 INFO L125 PetriNetUnfolderBase]: For 35832/35879 co-relation queries the response was YES. [2024-06-27 22:01:37,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33376 conditions, 9659 events. 6577/9659 cut-off events. For 35832/35879 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 57213 event pairs, 1966 based on Foata normal form. 44/9686 useless extension candidates. Maximal degree in co-relation 33348. Up to 8882 conditions per place. [2024-06-27 22:01:37,213 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 120 selfloop transitions, 43 changer transitions 0/175 dead transitions. [2024-06-27 22:01:37,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 175 transitions, 1278 flow [2024-06-27 22:01:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:01:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:01:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-27 22:01:37,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552 [2024-06-27 22:01:37,217 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 488 flow. Second operand 10 states and 276 transitions. [2024-06-27 22:01:37,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 175 transitions, 1278 flow [2024-06-27 22:01:37,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 175 transitions, 1190 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 22:01:37,258 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 794 flow [2024-06-27 22:01:37,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=794, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2024-06-27 22:01:37,259 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-27 22:01:37,259 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 794 flow [2024-06-27 22:01:37,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:37,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:37,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:37,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 22:01:37,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:37,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -94014806, now seen corresponding path program 2 times [2024-06-27 22:01:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:37,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190311881] [2024-06-27 22:01:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190311881] [2024-06-27 22:01:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190311881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:38,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:38,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:01:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548687675] [2024-06-27 22:01:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:01:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:01:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:01:38,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 22:01:38,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 794 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:38,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:38,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 22:01:38,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:40,552 INFO L124 PetriNetUnfolderBase]: 6669/9769 cut-off events. [2024-06-27 22:01:40,552 INFO L125 PetriNetUnfolderBase]: For 54110/54155 co-relation queries the response was YES. [2024-06-27 22:01:40,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36975 conditions, 9769 events. 6669/9769 cut-off events. For 54110/54155 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 57682 event pairs, 1920 based on Foata normal form. 46/9806 useless extension candidates. Maximal degree in co-relation 36939. Up to 8947 conditions per place. [2024-06-27 22:01:40,611 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 118 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2024-06-27 22:01:40,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 184 transitions, 1478 flow [2024-06-27 22:01:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:01:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:01:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 22:01:40,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 22:01:40,619 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 794 flow. Second operand 10 states and 273 transitions. [2024-06-27 22:01:40,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 184 transitions, 1478 flow [2024-06-27 22:01:40,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 184 transitions, 1386 flow, removed 46 selfloop flow, removed 0 redundant places. [2024-06-27 22:01:40,705 INFO L231 Difference]: Finished difference. Result has 104 places, 118 transitions, 961 flow [2024-06-27 22:01:40,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=961, PETRI_PLACES=104, PETRI_TRANSITIONS=118} [2024-06-27 22:01:40,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-27 22:01:40,707 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 118 transitions, 961 flow [2024-06-27 22:01:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:40,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:40,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 22:01:40,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:40,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash 75488874, now seen corresponding path program 3 times [2024-06-27 22:01:40,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750583960] [2024-06-27 22:01:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750583960] [2024-06-27 22:01:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750583960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:42,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:01:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350395047] [2024-06-27 22:01:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:42,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:01:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:01:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:01:42,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 22:01:42,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 961 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:42,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:42,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 22:01:42,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:43,764 INFO L124 PetriNetUnfolderBase]: 6677/9783 cut-off events. [2024-06-27 22:01:43,764 INFO L125 PetriNetUnfolderBase]: For 59261/59303 co-relation queries the response was YES. [2024-06-27 22:01:43,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38003 conditions, 9783 events. 6677/9783 cut-off events. For 59261/59303 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 57965 event pairs, 1920 based on Foata normal form. 46/9820 useless extension candidates. Maximal degree in co-relation 37961. Up to 8954 conditions per place. [2024-06-27 22:01:43,831 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 106 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2024-06-27 22:01:43,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 175 transitions, 1458 flow [2024-06-27 22:01:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:01:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:01:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 22:01:43,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 22:01:43,834 INFO L175 Difference]: Start difference. First operand has 104 places, 118 transitions, 961 flow. Second operand 9 states and 245 transitions. [2024-06-27 22:01:43,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 175 transitions, 1458 flow [2024-06-27 22:01:43,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 175 transitions, 1344 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 22:01:43,971 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 977 flow [2024-06-27 22:01:43,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=977, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-06-27 22:01:43,973 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-27 22:01:43,973 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 977 flow [2024-06-27 22:01:43,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:43,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:43,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:43,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 22:01:43,974 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:43,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:43,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1124696588, now seen corresponding path program 4 times [2024-06-27 22:01:43,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:43,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084901421] [2024-06-27 22:01:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:43,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:45,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:45,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084901421] [2024-06-27 22:01:45,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084901421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:45,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:45,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:01:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960766831] [2024-06-27 22:01:45,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:45,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:01:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:01:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:01:45,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 22:01:45,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 977 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 22:01:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:47,254 INFO L124 PetriNetUnfolderBase]: 7057/10360 cut-off events. [2024-06-27 22:01:47,254 INFO L125 PetriNetUnfolderBase]: For 60073/60120 co-relation queries the response was YES. [2024-06-27 22:01:47,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40045 conditions, 10360 events. 7057/10360 cut-off events. For 60073/60120 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 61657 event pairs, 1933 based on Foata normal form. 44/10385 useless extension candidates. Maximal degree in co-relation 40001. Up to 9380 conditions per place. [2024-06-27 22:01:47,332 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 124 selfloop transitions, 77 changer transitions 0/213 dead transitions. [2024-06-27 22:01:47,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 213 transitions, 1850 flow [2024-06-27 22:01:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:01:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:01:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-27 22:01:47,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622222222222222 [2024-06-27 22:01:47,337 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 977 flow. Second operand 9 states and 253 transitions. [2024-06-27 22:01:47,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 213 transitions, 1850 flow [2024-06-27 22:01:47,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 213 transitions, 1729 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 22:01:47,474 INFO L231 Difference]: Finished difference. Result has 119 places, 152 transitions, 1431 flow [2024-06-27 22:01:47,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1431, PETRI_PLACES=119, PETRI_TRANSITIONS=152} [2024-06-27 22:01:47,475 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-27 22:01:47,476 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 152 transitions, 1431 flow [2024-06-27 22:01:47,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:47,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:47,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:47,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 22:01:47,477 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:47,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash -994749402, now seen corresponding path program 1 times [2024-06-27 22:01:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:47,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355346439] [2024-06-27 22:01:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:47,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:48,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:48,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355346439] [2024-06-27 22:01:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355346439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:48,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:48,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:01:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008330623] [2024-06-27 22:01:48,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:48,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:01:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:01:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:01:48,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 22:01:48,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 152 transitions, 1431 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:48,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:48,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 22:01:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:50,194 INFO L124 PetriNetUnfolderBase]: 6821/10839 cut-off events. [2024-06-27 22:01:50,194 INFO L125 PetriNetUnfolderBase]: For 75593/75877 co-relation queries the response was YES. [2024-06-27 22:01:50,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41819 conditions, 10839 events. 6821/10839 cut-off events. For 75593/75877 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73242 event pairs, 2950 based on Foata normal form. 56/10542 useless extension candidates. Maximal degree in co-relation 41770. Up to 9630 conditions per place. [2024-06-27 22:01:50,259 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 140 selfloop transitions, 14 changer transitions 0/173 dead transitions. [2024-06-27 22:01:50,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 173 transitions, 1861 flow [2024-06-27 22:01:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:01:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:01:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 22:01:50,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 22:01:50,260 INFO L175 Difference]: Start difference. First operand has 119 places, 152 transitions, 1431 flow. Second operand 5 states and 130 transitions. [2024-06-27 22:01:50,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 173 transitions, 1861 flow [2024-06-27 22:01:50,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 173 transitions, 1678 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 22:01:50,347 INFO L231 Difference]: Finished difference. Result has 118 places, 162 transitions, 1401 flow [2024-06-27 22:01:50,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1401, PETRI_PLACES=118, PETRI_TRANSITIONS=162} [2024-06-27 22:01:50,349 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-27 22:01:50,349 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 162 transitions, 1401 flow [2024-06-27 22:01:50,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:50,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:50,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:50,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 22:01:50,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:50,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1126773156, now seen corresponding path program 1 times [2024-06-27 22:01:50,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:50,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470104188] [2024-06-27 22:01:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:50,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:52,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:52,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470104188] [2024-06-27 22:01:52,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470104188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:52,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:52,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:01:52,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577865263] [2024-06-27 22:01:52,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:52,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:01:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:01:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:01:52,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:01:52,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 162 transitions, 1401 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:52,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:52,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:01:52,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:54,041 INFO L124 PetriNetUnfolderBase]: 7572/11108 cut-off events. [2024-06-27 22:01:54,041 INFO L125 PetriNetUnfolderBase]: For 73465/73473 co-relation queries the response was YES. [2024-06-27 22:01:54,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44822 conditions, 11108 events. 7572/11108 cut-off events. For 73465/73473 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 65330 event pairs, 2136 based on Foata normal form. 7/11053 useless extension candidates. Maximal degree in co-relation 44774. Up to 9322 conditions per place. [2024-06-27 22:01:54,104 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 143 selfloop transitions, 96 changer transitions 0/249 dead transitions. [2024-06-27 22:01:54,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 249 transitions, 2379 flow [2024-06-27 22:01:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:01:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:01:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-27 22:01:54,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644444444444444 [2024-06-27 22:01:54,107 INFO L175 Difference]: Start difference. First operand has 118 places, 162 transitions, 1401 flow. Second operand 9 states and 254 transitions. [2024-06-27 22:01:54,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 249 transitions, 2379 flow [2024-06-27 22:01:54,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 249 transitions, 2362 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 22:01:54,190 INFO L231 Difference]: Finished difference. Result has 130 places, 184 transitions, 1863 flow [2024-06-27 22:01:54,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1863, PETRI_PLACES=130, PETRI_TRANSITIONS=184} [2024-06-27 22:01:54,191 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-27 22:01:54,191 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 184 transitions, 1863 flow [2024-06-27 22:01:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:54,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:54,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:54,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 22:01:54,192 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:54,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash -695516604, now seen corresponding path program 2 times [2024-06-27 22:01:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:54,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692775998] [2024-06-27 22:01:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:54,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:55,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:55,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692775998] [2024-06-27 22:01:55,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692775998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:55,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:55,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:01:55,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598376355] [2024-06-27 22:01:55,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:01:55,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:01:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:01:55,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:01:55,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 184 transitions, 1863 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:55,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:55,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:01:55,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:58,006 INFO L124 PetriNetUnfolderBase]: 7742/11341 cut-off events. [2024-06-27 22:01:58,006 INFO L125 PetriNetUnfolderBase]: For 96322/96330 co-relation queries the response was YES. [2024-06-27 22:01:58,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49756 conditions, 11341 events. 7742/11341 cut-off events. For 96322/96330 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 67270 event pairs, 1894 based on Foata normal form. 5/11290 useless extension candidates. Maximal degree in co-relation 49700. Up to 9435 conditions per place. [2024-06-27 22:01:58,082 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 155 selfloop transitions, 100 changer transitions 0/265 dead transitions. [2024-06-27 22:01:58,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 265 transitions, 2906 flow [2024-06-27 22:01:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:01:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:01:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-06-27 22:01:58,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-27 22:01:58,084 INFO L175 Difference]: Start difference. First operand has 130 places, 184 transitions, 1863 flow. Second operand 9 states and 258 transitions. [2024-06-27 22:01:58,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 265 transitions, 2906 flow [2024-06-27 22:01:58,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 265 transitions, 2745 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 22:01:58,228 INFO L231 Difference]: Finished difference. Result has 136 places, 195 transitions, 2094 flow [2024-06-27 22:01:58,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2094, PETRI_PLACES=136, PETRI_TRANSITIONS=195} [2024-06-27 22:01:58,229 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 80 predicate places. [2024-06-27 22:01:58,229 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 195 transitions, 2094 flow [2024-06-27 22:01:58,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:58,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:58,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:58,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 22:01:58,230 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:01:58,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash -695509164, now seen corresponding path program 3 times [2024-06-27 22:01:58,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:58,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974483492] [2024-06-27 22:01:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:58,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:59,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:59,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974483492] [2024-06-27 22:01:59,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974483492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:01:59,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:01:59,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:01:59,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465294925] [2024-06-27 22:01:59,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:01:59,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:01:59,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:59,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:01:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:00,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:00,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 195 transitions, 2094 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:00,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:00,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:00,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:02,179 INFO L124 PetriNetUnfolderBase]: 7730/11320 cut-off events. [2024-06-27 22:02:02,179 INFO L125 PetriNetUnfolderBase]: For 86401/86409 co-relation queries the response was YES. [2024-06-27 22:02:02,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49620 conditions, 11320 events. 7730/11320 cut-off events. For 86401/86409 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 67167 event pairs, 1878 based on Foata normal form. 5/11271 useless extension candidates. Maximal degree in co-relation 49561. Up to 9427 conditions per place. [2024-06-27 22:02:02,270 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 154 selfloop transitions, 100 changer transitions 0/264 dead transitions. [2024-06-27 22:02:02,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 264 transitions, 2933 flow [2024-06-27 22:02:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-27 22:02:02,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622222222222222 [2024-06-27 22:02:02,272 INFO L175 Difference]: Start difference. First operand has 136 places, 195 transitions, 2094 flow. Second operand 9 states and 253 transitions. [2024-06-27 22:02:02,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 264 transitions, 2933 flow [2024-06-27 22:02:02,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 264 transitions, 2756 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 22:02:02,457 INFO L231 Difference]: Finished difference. Result has 141 places, 195 transitions, 2130 flow [2024-06-27 22:02:02,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2130, PETRI_PLACES=141, PETRI_TRANSITIONS=195} [2024-06-27 22:02:02,458 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-27 22:02:02,458 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 195 transitions, 2130 flow [2024-06-27 22:02:02,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:02,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:02,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:02,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 22:02:02,458 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:02,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1370981150, now seen corresponding path program 1 times [2024-06-27 22:02:02,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:02,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885971456] [2024-06-27 22:02:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:02,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:02,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:02,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885971456] [2024-06-27 22:02:02,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885971456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:02,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:02,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 22:02:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010412265] [2024-06-27 22:02:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:02:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:02:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:02:02,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2024-06-27 22:02:02,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 195 transitions, 2130 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:02,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:02,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2024-06-27 22:02:02,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:03,284 INFO L124 PetriNetUnfolderBase]: 2568/5272 cut-off events. [2024-06-27 22:02:03,284 INFO L125 PetriNetUnfolderBase]: For 48806/49918 co-relation queries the response was YES. [2024-06-27 22:02:03,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17780 conditions, 5272 events. 2568/5272 cut-off events. For 48806/49918 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 43582 event pairs, 734 based on Foata normal form. 363/5131 useless extension candidates. Maximal degree in co-relation 17742. Up to 2961 conditions per place. [2024-06-27 22:02:03,330 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 33 selfloop transitions, 37 changer transitions 0/168 dead transitions. [2024-06-27 22:02:03,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 168 transitions, 1832 flow [2024-06-27 22:02:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:02:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:02:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-06-27 22:02:03,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2024-06-27 22:02:03,331 INFO L175 Difference]: Start difference. First operand has 141 places, 195 transitions, 2130 flow. Second operand 3 states and 113 transitions. [2024-06-27 22:02:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 168 transitions, 1832 flow [2024-06-27 22:02:03,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 168 transitions, 1697 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 22:02:03,382 INFO L231 Difference]: Finished difference. Result has 125 places, 160 transitions, 1613 flow [2024-06-27 22:02:03,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1613, PETRI_PLACES=125, PETRI_TRANSITIONS=160} [2024-06-27 22:02:03,383 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-27 22:02:03,383 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 160 transitions, 1613 flow [2024-06-27 22:02:03,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:03,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:03,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:03,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 22:02:03,384 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:03,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2124859366, now seen corresponding path program 4 times [2024-06-27 22:02:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:03,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85437471] [2024-06-27 22:02:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:03,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:04,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85437471] [2024-06-27 22:02:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85437471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:04,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:04,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090861160] [2024-06-27 22:02:04,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:04,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:05,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:05,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 160 transitions, 1613 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:05,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:05,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:05,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:06,779 INFO L124 PetriNetUnfolderBase]: 6864/10190 cut-off events. [2024-06-27 22:02:06,779 INFO L125 PetriNetUnfolderBase]: For 74509/74515 co-relation queries the response was YES. [2024-06-27 22:02:06,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42202 conditions, 10190 events. 6864/10190 cut-off events. For 74509/74515 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 60651 event pairs, 1671 based on Foata normal form. 8/10128 useless extension candidates. Maximal degree in co-relation 42166. Up to 8736 conditions per place. [2024-06-27 22:02:06,844 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 125 selfloop transitions, 85 changer transitions 6/226 dead transitions. [2024-06-27 22:02:06,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 226 transitions, 2374 flow [2024-06-27 22:02:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:02:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:02:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 22:02:06,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-27 22:02:06,846 INFO L175 Difference]: Start difference. First operand has 125 places, 160 transitions, 1613 flow. Second operand 8 states and 217 transitions. [2024-06-27 22:02:06,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 226 transitions, 2374 flow [2024-06-27 22:02:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 226 transitions, 2294 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 22:02:06,961 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 1820 flow [2024-06-27 22:02:06,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1820, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2024-06-27 22:02:06,962 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-27 22:02:06,962 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 1820 flow [2024-06-27 22:02:06,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:06,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:06,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 22:02:06,963 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:06,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1964015036, now seen corresponding path program 5 times [2024-06-27 22:02:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:06,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728889260] [2024-06-27 22:02:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:08,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728889260] [2024-06-27 22:02:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728889260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:08,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:08,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459515584] [2024-06-27 22:02:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:08,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:08,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:08,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 1820 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:08,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:08,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:10,172 INFO L124 PetriNetUnfolderBase]: 6048/8951 cut-off events. [2024-06-27 22:02:10,172 INFO L125 PetriNetUnfolderBase]: For 75633/75639 co-relation queries the response was YES. [2024-06-27 22:02:10,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39094 conditions, 8951 events. 6048/8951 cut-off events. For 75633/75639 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 51949 event pairs, 1470 based on Foata normal form. 8/8918 useless extension candidates. Maximal degree in co-relation 39056. Up to 7689 conditions per place. [2024-06-27 22:02:10,239 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 129 selfloop transitions, 86 changer transitions 0/225 dead transitions. [2024-06-27 22:02:10,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 225 transitions, 2592 flow [2024-06-27 22:02:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:02:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:02:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 22:02:10,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 22:02:10,240 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 1820 flow. Second operand 8 states and 215 transitions. [2024-06-27 22:02:10,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 225 transitions, 2592 flow [2024-06-27 22:02:10,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 225 transitions, 2484 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 22:02:10,348 INFO L231 Difference]: Finished difference. Result has 137 places, 171 transitions, 1962 flow [2024-06-27 22:02:10,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1962, PETRI_PLACES=137, PETRI_TRANSITIONS=171} [2024-06-27 22:02:10,349 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-27 22:02:10,349 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 171 transitions, 1962 flow [2024-06-27 22:02:10,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:10,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:10,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 22:02:10,350 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:10,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1964007596, now seen corresponding path program 6 times [2024-06-27 22:02:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:10,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323854695] [2024-06-27 22:02:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:10,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323854695] [2024-06-27 22:02:11,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323854695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:11,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:11,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105140999] [2024-06-27 22:02:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:11,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:11,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:11,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 171 transitions, 1962 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:11,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:11,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:11,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:13,559 INFO L124 PetriNetUnfolderBase]: 6038/8929 cut-off events. [2024-06-27 22:02:13,559 INFO L125 PetriNetUnfolderBase]: For 80707/80713 co-relation queries the response was YES. [2024-06-27 22:02:13,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39099 conditions, 8929 events. 6038/8929 cut-off events. For 80707/80713 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 51781 event pairs, 1454 based on Foata normal form. 8/8899 useless extension candidates. Maximal degree in co-relation 39059. Up to 7681 conditions per place. [2024-06-27 22:02:13,635 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 133 selfloop transitions, 83 changer transitions 0/226 dead transitions. [2024-06-27 22:02:13,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 226 transitions, 2639 flow [2024-06-27 22:02:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:02:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:02:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 22:02:13,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-06-27 22:02:13,637 INFO L175 Difference]: Start difference. First operand has 137 places, 171 transitions, 1962 flow. Second operand 8 states and 214 transitions. [2024-06-27 22:02:13,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 226 transitions, 2639 flow [2024-06-27 22:02:13,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 226 transitions, 2499 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 22:02:13,782 INFO L231 Difference]: Finished difference. Result has 141 places, 171 transitions, 1999 flow [2024-06-27 22:02:13,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1999, PETRI_PLACES=141, PETRI_TRANSITIONS=171} [2024-06-27 22:02:13,783 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-27 22:02:13,783 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 171 transitions, 1999 flow [2024-06-27 22:02:13,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:13,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:13,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 22:02:13,784 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:13,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash -790119634, now seen corresponding path program 7 times [2024-06-27 22:02:13,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:13,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819303173] [2024-06-27 22:02:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:13,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:15,017 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 22:02:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819303173] [2024-06-27 22:02:15,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819303173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:15,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:15,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178192915] [2024-06-27 22:02:15,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:15,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:15,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:15,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:15,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 171 transitions, 1999 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:15,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:15,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:15,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:16,782 INFO L124 PetriNetUnfolderBase]: 6555/9873 cut-off events. [2024-06-27 22:02:16,782 INFO L125 PetriNetUnfolderBase]: For 98963/98971 co-relation queries the response was YES. [2024-06-27 22:02:16,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43599 conditions, 9873 events. 6555/9873 cut-off events. For 98963/98971 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 59493 event pairs, 1520 based on Foata normal form. 7/9794 useless extension candidates. Maximal degree in co-relation 43558. Up to 8098 conditions per place. [2024-06-27 22:02:16,874 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 134 selfloop transitions, 141 changer transitions 0/285 dead transitions. [2024-06-27 22:02:16,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 285 transitions, 3514 flow [2024-06-27 22:02:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 22:02:16,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422222222222223 [2024-06-27 22:02:16,875 INFO L175 Difference]: Start difference. First operand has 141 places, 171 transitions, 1999 flow. Second operand 9 states and 244 transitions. [2024-06-27 22:02:16,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 285 transitions, 3514 flow [2024-06-27 22:02:17,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 285 transitions, 3295 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 22:02:17,031 INFO L231 Difference]: Finished difference. Result has 149 places, 220 transitions, 2820 flow [2024-06-27 22:02:17,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2820, PETRI_PLACES=149, PETRI_TRANSITIONS=220} [2024-06-27 22:02:17,032 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-27 22:02:17,032 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 220 transitions, 2820 flow [2024-06-27 22:02:17,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:17,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:17,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:17,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 22:02:17,033 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:17,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:17,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1173673976, now seen corresponding path program 8 times [2024-06-27 22:02:17,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:17,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75161548] [2024-06-27 22:02:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:17,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:18,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:18,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75161548] [2024-06-27 22:02:18,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75161548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:18,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:18,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886763009] [2024-06-27 22:02:18,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:18,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:18,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:18,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 220 transitions, 2820 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:18,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:18,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:18,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:20,367 INFO L124 PetriNetUnfolderBase]: 7270/11062 cut-off events. [2024-06-27 22:02:20,367 INFO L125 PetriNetUnfolderBase]: For 122406/122424 co-relation queries the response was YES. [2024-06-27 22:02:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51767 conditions, 11062 events. 7270/11062 cut-off events. For 122406/122424 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 68665 event pairs, 1597 based on Foata normal form. 19/10960 useless extension candidates. Maximal degree in co-relation 51722. Up to 8687 conditions per place. [2024-06-27 22:02:20,475 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 145 selfloop transitions, 215 changer transitions 0/370 dead transitions. [2024-06-27 22:02:20,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 370 transitions, 5111 flow [2024-06-27 22:02:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 22:02:20,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 22:02:20,476 INFO L175 Difference]: Start difference. First operand has 149 places, 220 transitions, 2820 flow. Second operand 9 states and 243 transitions. [2024-06-27 22:02:20,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 370 transitions, 5111 flow [2024-06-27 22:02:20,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 370 transitions, 4738 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 22:02:20,721 INFO L231 Difference]: Finished difference. Result has 156 places, 303 transitions, 4265 flow [2024-06-27 22:02:20,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4265, PETRI_PLACES=156, PETRI_TRANSITIONS=303} [2024-06-27 22:02:20,722 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-27 22:02:20,722 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 303 transitions, 4265 flow [2024-06-27 22:02:20,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:20,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:20,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:20,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 22:02:20,723 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:20,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:20,723 INFO L85 PathProgramCache]: Analyzing trace with hash -480823976, now seen corresponding path program 9 times [2024-06-27 22:02:20,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:20,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901065317] [2024-06-27 22:02:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:20,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:22,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901065317] [2024-06-27 22:02:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901065317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:22,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:22,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982106229] [2024-06-27 22:02:22,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:22,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:22,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:22,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:22,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:22,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 303 transitions, 4265 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:22,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:22,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:22,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:24,380 INFO L124 PetriNetUnfolderBase]: 7504/11372 cut-off events. [2024-06-27 22:02:24,380 INFO L125 PetriNetUnfolderBase]: For 135305/135321 co-relation queries the response was YES. [2024-06-27 22:02:24,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55135 conditions, 11372 events. 7504/11372 cut-off events. For 135305/135321 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70469 event pairs, 1582 based on Foata normal form. 17/11278 useless extension candidates. Maximal degree in co-relation 55087. Up to 8886 conditions per place. [2024-06-27 22:02:24,474 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 146 selfloop transitions, 238 changer transitions 0/394 dead transitions. [2024-06-27 22:02:24,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 394 transitions, 5780 flow [2024-06-27 22:02:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 22:02:24,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-06-27 22:02:24,476 INFO L175 Difference]: Start difference. First operand has 156 places, 303 transitions, 4265 flow. Second operand 9 states and 242 transitions. [2024-06-27 22:02:24,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 394 transitions, 5780 flow [2024-06-27 22:02:24,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 394 transitions, 5510 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 22:02:24,760 INFO L231 Difference]: Finished difference. Result has 162 places, 326 transitions, 4904 flow [2024-06-27 22:02:24,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4904, PETRI_PLACES=162, PETRI_TRANSITIONS=326} [2024-06-27 22:02:24,761 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-27 22:02:24,761 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 326 transitions, 4904 flow [2024-06-27 22:02:24,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:24,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:24,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:24,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 22:02:24,762 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:24,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1168109786, now seen corresponding path program 10 times [2024-06-27 22:02:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:24,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145454590] [2024-06-27 22:02:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:26,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145454590] [2024-06-27 22:02:26,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145454590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:26,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272016405] [2024-06-27 22:02:26,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:26,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:26,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:26,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:26,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 326 transitions, 4904 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:26,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:26,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:26,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:28,213 INFO L124 PetriNetUnfolderBase]: 7488/11361 cut-off events. [2024-06-27 22:02:28,214 INFO L125 PetriNetUnfolderBase]: For 150374/150390 co-relation queries the response was YES. [2024-06-27 22:02:28,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55579 conditions, 11361 events. 7488/11361 cut-off events. For 150374/150390 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 70431 event pairs, 1601 based on Foata normal form. 17/11263 useless extension candidates. Maximal degree in co-relation 55530. Up to 8873 conditions per place. [2024-06-27 22:02:28,322 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 150 selfloop transitions, 232 changer transitions 0/392 dead transitions. [2024-06-27 22:02:28,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 392 transitions, 5962 flow [2024-06-27 22:02:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 22:02:28,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-06-27 22:02:28,323 INFO L175 Difference]: Start difference. First operand has 162 places, 326 transitions, 4904 flow. Second operand 9 states and 242 transitions. [2024-06-27 22:02:28,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 392 transitions, 5962 flow [2024-06-27 22:02:28,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 392 transitions, 5592 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 22:02:28,699 INFO L231 Difference]: Finished difference. Result has 166 places, 326 transitions, 5017 flow [2024-06-27 22:02:28,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5017, PETRI_PLACES=166, PETRI_TRANSITIONS=326} [2024-06-27 22:02:28,700 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-06-27 22:02:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 326 transitions, 5017 flow [2024-06-27 22:02:28,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:28,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:28,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:28,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 22:02:28,701 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:28,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1390045069, now seen corresponding path program 1 times [2024-06-27 22:02:28,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:28,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215100745] [2024-06-27 22:02:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:31,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215100745] [2024-06-27 22:02:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215100745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:31,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:31,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:02:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311304358] [2024-06-27 22:02:31,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:31,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:02:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:31,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:02:31,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:02:31,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 22:02:31,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 326 transitions, 5017 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:31,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:31,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 22:02:31,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:33,171 INFO L124 PetriNetUnfolderBase]: 6855/11238 cut-off events. [2024-06-27 22:02:33,171 INFO L125 PetriNetUnfolderBase]: For 150085/150089 co-relation queries the response was YES. [2024-06-27 22:02:33,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51351 conditions, 11238 events. 6855/11238 cut-off events. For 150085/150089 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 78037 event pairs, 2494 based on Foata normal form. 8/10996 useless extension candidates. Maximal degree in co-relation 51302. Up to 9463 conditions per place. [2024-06-27 22:02:33,259 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 271 selfloop transitions, 23 changer transitions 0/373 dead transitions. [2024-06-27 22:02:33,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 373 transitions, 5817 flow [2024-06-27 22:02:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:02:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:02:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 22:02:33,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-27 22:02:33,261 INFO L175 Difference]: Start difference. First operand has 166 places, 326 transitions, 5017 flow. Second operand 8 states and 205 transitions. [2024-06-27 22:02:33,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 373 transitions, 5817 flow [2024-06-27 22:02:33,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 373 transitions, 5331 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 22:02:33,591 INFO L231 Difference]: Finished difference. Result has 168 places, 331 transitions, 4662 flow [2024-06-27 22:02:33,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4662, PETRI_PLACES=168, PETRI_TRANSITIONS=331} [2024-06-27 22:02:33,592 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-27 22:02:33,592 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 331 transitions, 4662 flow [2024-06-27 22:02:33,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:33,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:33,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:33,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 22:02:33,593 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:33,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:33,593 INFO L85 PathProgramCache]: Analyzing trace with hash -810889508, now seen corresponding path program 1 times [2024-06-27 22:02:33,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:33,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496661306] [2024-06-27 22:02:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:33,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:35,640 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 22:02:35,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:35,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496661306] [2024-06-27 22:02:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496661306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:35,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:35,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:02:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463031570] [2024-06-27 22:02:35,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:35,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:02:35,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:02:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:02:35,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 22:02:35,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 331 transitions, 4662 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:35,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:35,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 22:02:35,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:37,194 INFO L124 PetriNetUnfolderBase]: 5868/9849 cut-off events. [2024-06-27 22:02:37,194 INFO L125 PetriNetUnfolderBase]: For 140643/140890 co-relation queries the response was YES. [2024-06-27 22:02:37,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45456 conditions, 9849 events. 5868/9849 cut-off events. For 140643/140890 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 69580 event pairs, 2067 based on Foata normal form. 79/9619 useless extension candidates. Maximal degree in co-relation 45405. Up to 8064 conditions per place. [2024-06-27 22:02:37,294 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 240 selfloop transitions, 17 changer transitions 0/351 dead transitions. [2024-06-27 22:02:37,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 351 transitions, 5260 flow [2024-06-27 22:02:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:02:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:02:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 22:02:37,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-06-27 22:02:37,295 INFO L175 Difference]: Start difference. First operand has 168 places, 331 transitions, 4662 flow. Second operand 7 states and 173 transitions. [2024-06-27 22:02:37,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 351 transitions, 5260 flow [2024-06-27 22:02:37,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 351 transitions, 5032 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 22:02:37,550 INFO L231 Difference]: Finished difference. Result has 168 places, 334 transitions, 4508 flow [2024-06-27 22:02:37,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4434, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4508, PETRI_PLACES=168, PETRI_TRANSITIONS=334} [2024-06-27 22:02:37,551 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-27 22:02:37,551 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 334 transitions, 4508 flow [2024-06-27 22:02:37,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:37,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:37,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:37,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 22:02:37,552 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:37,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1312781991, now seen corresponding path program 1 times [2024-06-27 22:02:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141847543] [2024-06-27 22:02:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:39,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:39,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141847543] [2024-06-27 22:02:39,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141847543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:39,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:39,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:02:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024814674] [2024-06-27 22:02:39,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:39,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:02:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:02:39,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:02:39,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:39,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 334 transitions, 4508 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:39,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:39,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:39,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:41,694 INFO L124 PetriNetUnfolderBase]: 7563/12302 cut-off events. [2024-06-27 22:02:41,694 INFO L125 PetriNetUnfolderBase]: For 158505/158505 co-relation queries the response was YES. [2024-06-27 22:02:41,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56882 conditions, 12302 events. 7563/12302 cut-off events. For 158505/158505 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 82844 event pairs, 2141 based on Foata normal form. 2/11888 useless extension candidates. Maximal degree in co-relation 56830. Up to 10421 conditions per place. [2024-06-27 22:02:41,787 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 349 selfloop transitions, 52 changer transitions 0/411 dead transitions. [2024-06-27 22:02:41,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 411 transitions, 5684 flow [2024-06-27 22:02:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 22:02:41,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 22:02:41,789 INFO L175 Difference]: Start difference. First operand has 168 places, 334 transitions, 4508 flow. Second operand 9 states and 234 transitions. [2024-06-27 22:02:41,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 411 transitions, 5684 flow [2024-06-27 22:02:42,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 411 transitions, 5630 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 22:02:42,082 INFO L231 Difference]: Finished difference. Result has 174 places, 349 transitions, 4710 flow [2024-06-27 22:02:42,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4710, PETRI_PLACES=174, PETRI_TRANSITIONS=349} [2024-06-27 22:02:42,083 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-06-27 22:02:42,083 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 349 transitions, 4710 flow [2024-06-27 22:02:42,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:42,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:42,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:42,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 22:02:42,084 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:42,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1312661835, now seen corresponding path program 1 times [2024-06-27 22:02:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612839248] [2024-06-27 22:02:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:42,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:44,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:44,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612839248] [2024-06-27 22:02:44,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612839248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:44,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:44,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:02:44,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983157338] [2024-06-27 22:02:44,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:44,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:02:44,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:02:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:02:44,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:44,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 349 transitions, 4710 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:44,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:44,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:44,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:46,305 INFO L124 PetriNetUnfolderBase]: 7711/11783 cut-off events. [2024-06-27 22:02:46,305 INFO L125 PetriNetUnfolderBase]: For 170444/170456 co-relation queries the response was YES. [2024-06-27 22:02:46,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57889 conditions, 11783 events. 7711/11783 cut-off events. For 170444/170456 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 74202 event pairs, 1697 based on Foata normal form. 9/11615 useless extension candidates. Maximal degree in co-relation 57834. Up to 8283 conditions per place. [2024-06-27 22:02:46,423 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 183 selfloop transitions, 234 changer transitions 0/427 dead transitions. [2024-06-27 22:02:46,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 427 transitions, 6110 flow [2024-06-27 22:02:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 22:02:46,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-06-27 22:02:46,425 INFO L175 Difference]: Start difference. First operand has 174 places, 349 transitions, 4710 flow. Second operand 9 states and 248 transitions. [2024-06-27 22:02:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 427 transitions, 6110 flow [2024-06-27 22:02:46,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 427 transitions, 5990 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 22:02:46,747 INFO L231 Difference]: Finished difference. Result has 184 places, 365 transitions, 5244 flow [2024-06-27 22:02:46,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5244, PETRI_PLACES=184, PETRI_TRANSITIONS=365} [2024-06-27 22:02:46,747 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-06-27 22:02:46,747 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 365 transitions, 5244 flow [2024-06-27 22:02:46,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:46,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:46,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:46,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 22:02:46,748 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:46,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash -92439457, now seen corresponding path program 2 times [2024-06-27 22:02:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672788305] [2024-06-27 22:02:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:46,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:48,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:48,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672788305] [2024-06-27 22:02:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672788305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:48,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:48,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:02:48,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510526609] [2024-06-27 22:02:48,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:48,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:02:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:02:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:02:48,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:48,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 365 transitions, 5244 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:48,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:48,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:48,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:50,925 INFO L124 PetriNetUnfolderBase]: 7836/11935 cut-off events. [2024-06-27 22:02:50,925 INFO L125 PetriNetUnfolderBase]: For 186552/186564 co-relation queries the response was YES. [2024-06-27 22:02:50,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61577 conditions, 11935 events. 7836/11935 cut-off events. For 186552/186564 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 74882 event pairs, 1574 based on Foata normal form. 9/11775 useless extension candidates. Maximal degree in co-relation 61518. Up to 8384 conditions per place. [2024-06-27 22:02:51,041 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 224 selfloop transitions, 208 changer transitions 0/442 dead transitions. [2024-06-27 22:02:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 442 transitions, 6773 flow [2024-06-27 22:02:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-06-27 22:02:51,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-27 22:02:51,042 INFO L175 Difference]: Start difference. First operand has 184 places, 365 transitions, 5244 flow. Second operand 9 states and 252 transitions. [2024-06-27 22:02:51,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 442 transitions, 6773 flow [2024-06-27 22:02:51,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 442 transitions, 6664 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-27 22:02:51,423 INFO L231 Difference]: Finished difference. Result has 193 places, 374 transitions, 5688 flow [2024-06-27 22:02:51,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5688, PETRI_PLACES=193, PETRI_TRANSITIONS=374} [2024-06-27 22:02:51,423 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-06-27 22:02:51,423 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 374 transitions, 5688 flow [2024-06-27 22:02:51,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:51,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:51,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:51,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 22:02:51,424 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:51,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:51,425 INFO L85 PathProgramCache]: Analyzing trace with hash -258666727, now seen corresponding path program 3 times [2024-06-27 22:02:51,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:51,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037812152] [2024-06-27 22:02:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:53,196 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 22:02:53,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:53,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037812152] [2024-06-27 22:02:53,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037812152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:53,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:53,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:02:53,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659137412] [2024-06-27 22:02:53,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:53,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:02:53,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:02:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:02:53,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:53,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 374 transitions, 5688 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:53,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:53,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:53,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:02:55,594 INFO L124 PetriNetUnfolderBase]: 7826/11809 cut-off events. [2024-06-27 22:02:55,594 INFO L125 PetriNetUnfolderBase]: For 197687/197699 co-relation queries the response was YES. [2024-06-27 22:02:55,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63073 conditions, 11809 events. 7826/11809 cut-off events. For 197687/197699 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 72933 event pairs, 1538 based on Foata normal form. 9/11688 useless extension candidates. Maximal degree in co-relation 63011. Up to 8376 conditions per place. [2024-06-27 22:02:55,718 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 225 selfloop transitions, 207 changer transitions 0/442 dead transitions. [2024-06-27 22:02:55,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 442 transitions, 7038 flow [2024-06-27 22:02:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:02:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:02:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 22:02:55,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-06-27 22:02:55,720 INFO L175 Difference]: Start difference. First operand has 193 places, 374 transitions, 5688 flow. Second operand 9 states and 248 transitions. [2024-06-27 22:02:55,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 442 transitions, 7038 flow [2024-06-27 22:02:56,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 442 transitions, 6736 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 22:02:56,181 INFO L231 Difference]: Finished difference. Result has 198 places, 374 transitions, 5813 flow [2024-06-27 22:02:56,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5813, PETRI_PLACES=198, PETRI_TRANSITIONS=374} [2024-06-27 22:02:56,182 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-06-27 22:02:56,182 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 374 transitions, 5813 flow [2024-06-27 22:02:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:56,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:02:56,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:02:56,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 22:02:56,183 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:02:56,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:02:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1376491561, now seen corresponding path program 4 times [2024-06-27 22:02:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:02:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945572228] [2024-06-27 22:02:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:02:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:02:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:02:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:02:57,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:02:57,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945572228] [2024-06-27 22:02:57,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945572228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:02:57,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:02:57,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:02:57,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879162915] [2024-06-27 22:02:57,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:02:57,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:02:57,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:02:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:02:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:02:58,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:02:58,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 374 transitions, 5813 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:02:58,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:02:58,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:02:58,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:00,685 INFO L124 PetriNetUnfolderBase]: 8007/12119 cut-off events. [2024-06-27 22:03:00,686 INFO L125 PetriNetUnfolderBase]: For 218254/218266 co-relation queries the response was YES. [2024-06-27 22:03:00,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65148 conditions, 12119 events. 8007/12119 cut-off events. For 218254/218266 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 75457 event pairs, 1638 based on Foata normal form. 9/11985 useless extension candidates. Maximal degree in co-relation 65085. Up to 8524 conditions per place. [2024-06-27 22:03:00,806 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 245 selfloop transitions, 209 changer transitions 0/464 dead transitions. [2024-06-27 22:03:00,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 464 transitions, 7647 flow [2024-06-27 22:03:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:03:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:03:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-27 22:03:00,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 22:03:00,809 INFO L175 Difference]: Start difference. First operand has 198 places, 374 transitions, 5813 flow. Second operand 9 states and 255 transitions. [2024-06-27 22:03:00,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 464 transitions, 7647 flow [2024-06-27 22:03:01,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 464 transitions, 7265 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 22:03:01,357 INFO L231 Difference]: Finished difference. Result has 203 places, 386 transitions, 6050 flow [2024-06-27 22:03:01,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6050, PETRI_PLACES=203, PETRI_TRANSITIONS=386} [2024-06-27 22:03:01,358 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 147 predicate places. [2024-06-27 22:03:01,358 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 386 transitions, 6050 flow [2024-06-27 22:03:01,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:01,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:01,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:01,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 22:03:01,359 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:01,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1135293165, now seen corresponding path program 5 times [2024-06-27 22:03:01,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:01,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371515929] [2024-06-27 22:03:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:01,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:03,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371515929] [2024-06-27 22:03:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371515929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:03,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:03,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39963532] [2024-06-27 22:03:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:03,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:03,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:03,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:03,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 386 transitions, 6050 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:03,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:03,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:03,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:05,606 INFO L124 PetriNetUnfolderBase]: 7997/12101 cut-off events. [2024-06-27 22:03:05,606 INFO L125 PetriNetUnfolderBase]: For 227787/227799 co-relation queries the response was YES. [2024-06-27 22:03:05,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65598 conditions, 12101 events. 7997/12101 cut-off events. For 227787/227799 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 75206 event pairs, 1616 based on Foata normal form. 9/11972 useless extension candidates. Maximal degree in co-relation 65533. Up to 8516 conditions per place. [2024-06-27 22:03:05,732 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 238 selfloop transitions, 214 changer transitions 0/462 dead transitions. [2024-06-27 22:03:05,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 462 transitions, 7638 flow [2024-06-27 22:03:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:03:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:03:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 22:03:05,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 22:03:05,734 INFO L175 Difference]: Start difference. First operand has 203 places, 386 transitions, 6050 flow. Second operand 9 states and 250 transitions. [2024-06-27 22:03:05,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 462 transitions, 7638 flow [2024-06-27 22:03:06,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 462 transitions, 7365 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 22:03:06,314 INFO L231 Difference]: Finished difference. Result has 209 places, 386 transitions, 6218 flow [2024-06-27 22:03:06,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5777, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6218, PETRI_PLACES=209, PETRI_TRANSITIONS=386} [2024-06-27 22:03:06,315 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-06-27 22:03:06,315 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 386 transitions, 6218 flow [2024-06-27 22:03:06,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:06,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:06,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 22:03:06,316 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:06,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1135530315, now seen corresponding path program 6 times [2024-06-27 22:03:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:06,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677617244] [2024-06-27 22:03:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:07,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677617244] [2024-06-27 22:03:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677617244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:07,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:07,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:07,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191174619] [2024-06-27 22:03:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:07,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:07,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:08,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:08,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 386 transitions, 6218 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:08,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:08,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:10,542 INFO L124 PetriNetUnfolderBase]: 7987/12118 cut-off events. [2024-06-27 22:03:10,542 INFO L125 PetriNetUnfolderBase]: For 244208/244220 co-relation queries the response was YES. [2024-06-27 22:03:10,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65856 conditions, 12118 events. 7987/12118 cut-off events. For 244208/244220 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 75603 event pairs, 1666 based on Foata normal form. 9/11978 useless extension candidates. Maximal degree in co-relation 65790. Up to 8508 conditions per place. [2024-06-27 22:03:10,665 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 227 selfloop transitions, 219 changer transitions 0/456 dead transitions. [2024-06-27 22:03:10,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 456 transitions, 7642 flow [2024-06-27 22:03:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:03:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:03:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 22:03:10,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 22:03:10,667 INFO L175 Difference]: Start difference. First operand has 209 places, 386 transitions, 6218 flow. Second operand 9 states and 250 transitions. [2024-06-27 22:03:10,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 456 transitions, 7642 flow [2024-06-27 22:03:11,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 456 transitions, 7300 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 22:03:11,313 INFO L231 Difference]: Finished difference. Result has 213 places, 386 transitions, 6322 flow [2024-06-27 22:03:11,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6322, PETRI_PLACES=213, PETRI_TRANSITIONS=386} [2024-06-27 22:03:11,314 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 157 predicate places. [2024-06-27 22:03:11,314 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 386 transitions, 6322 flow [2024-06-27 22:03:11,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:11,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:11,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 22:03:11,315 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1955021367, now seen corresponding path program 1 times [2024-06-27 22:03:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248057472] [2024-06-27 22:03:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248057472] [2024-06-27 22:03:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248057472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:12,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:03:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038844820] [2024-06-27 22:03:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:12,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:03:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:03:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:03:12,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 22:03:12,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 386 transitions, 6322 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 22:03:12,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:12,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 22:03:12,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:14,510 INFO L124 PetriNetUnfolderBase]: 7012/11555 cut-off events. [2024-06-27 22:03:14,510 INFO L125 PetriNetUnfolderBase]: For 244685/244872 co-relation queries the response was YES. [2024-06-27 22:03:14,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59419 conditions, 11555 events. 7012/11555 cut-off events. For 244685/244872 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 80951 event pairs, 2228 based on Foata normal form. 102/11321 useless extension candidates. Maximal degree in co-relation 59352. Up to 9645 conditions per place. [2024-06-27 22:03:14,649 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 298 selfloop transitions, 39 changer transitions 0/433 dead transitions. [2024-06-27 22:03:14,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 433 transitions, 7580 flow [2024-06-27 22:03:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:03:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:03:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 22:03:14,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48857142857142855 [2024-06-27 22:03:14,655 INFO L175 Difference]: Start difference. First operand has 213 places, 386 transitions, 6322 flow. Second operand 7 states and 171 transitions. [2024-06-27 22:03:14,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 433 transitions, 7580 flow [2024-06-27 22:03:15,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 433 transitions, 7206 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 22:03:15,218 INFO L231 Difference]: Finished difference. Result has 217 places, 414 transitions, 6631 flow [2024-06-27 22:03:15,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5969, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6631, PETRI_PLACES=217, PETRI_TRANSITIONS=414} [2024-06-27 22:03:15,219 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 161 predicate places. [2024-06-27 22:03:15,219 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 414 transitions, 6631 flow [2024-06-27 22:03:15,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 22:03:15,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:15,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:15,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 22:03:15,219 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:15,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1852853257, now seen corresponding path program 7 times [2024-06-27 22:03:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:15,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641570209] [2024-06-27 22:03:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:17,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:17,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641570209] [2024-06-27 22:03:17,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641570209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:17,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:17,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:17,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175570917] [2024-06-27 22:03:17,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:17,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:17,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:17,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 414 transitions, 6631 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:17,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:17,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:17,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:19,561 INFO L124 PetriNetUnfolderBase]: 8113/12313 cut-off events. [2024-06-27 22:03:19,561 INFO L125 PetriNetUnfolderBase]: For 265888/265900 co-relation queries the response was YES. [2024-06-27 22:03:19,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67548 conditions, 12313 events. 8113/12313 cut-off events. For 265888/265900 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 77138 event pairs, 1563 based on Foata normal form. 12/12177 useless extension candidates. Maximal degree in co-relation 67478. Up to 8626 conditions per place. [2024-06-27 22:03:19,714 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 271 selfloop transitions, 224 changer transitions 0/505 dead transitions. [2024-06-27 22:03:19,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 505 transitions, 8508 flow [2024-06-27 22:03:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:03:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:03:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 22:03:19,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-06-27 22:03:19,715 INFO L175 Difference]: Start difference. First operand has 217 places, 414 transitions, 6631 flow. Second operand 9 states and 248 transitions. [2024-06-27 22:03:19,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 505 transitions, 8508 flow [2024-06-27 22:03:20,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 505 transitions, 8472 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 22:03:20,404 INFO L231 Difference]: Finished difference. Result has 225 places, 422 transitions, 7193 flow [2024-06-27 22:03:20,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6599, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7193, PETRI_PLACES=225, PETRI_TRANSITIONS=422} [2024-06-27 22:03:20,404 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-06-27 22:03:20,404 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 422 transitions, 7193 flow [2024-06-27 22:03:20,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:20,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:20,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:20,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 22:03:20,405 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:20,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash 811549859, now seen corresponding path program 8 times [2024-06-27 22:03:20,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:20,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692238283] [2024-06-27 22:03:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:20,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:22,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:22,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692238283] [2024-06-27 22:03:22,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692238283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:22,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:22,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:22,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175993842] [2024-06-27 22:03:22,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:22,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:22,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:22,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:22,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 422 transitions, 7193 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:22,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:22,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:22,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:24,587 INFO L124 PetriNetUnfolderBase]: 8103/12497 cut-off events. [2024-06-27 22:03:24,587 INFO L125 PetriNetUnfolderBase]: For 285855/285867 co-relation queries the response was YES. [2024-06-27 22:03:24,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69970 conditions, 12497 events. 8103/12497 cut-off events. For 285855/285867 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 80148 event pairs, 1523 based on Foata normal form. 12/12295 useless extension candidates. Maximal degree in co-relation 69897. Up to 8618 conditions per place. [2024-06-27 22:03:24,721 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 242 selfloop transitions, 244 changer transitions 0/496 dead transitions. [2024-06-27 22:03:24,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 496 transitions, 8665 flow [2024-06-27 22:03:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:03:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:03:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 22:03:24,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 22:03:24,722 INFO L175 Difference]: Start difference. First operand has 225 places, 422 transitions, 7193 flow. Second operand 9 states and 240 transitions. [2024-06-27 22:03:24,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 496 transitions, 8665 flow [2024-06-27 22:03:25,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 496 transitions, 8116 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 22:03:25,431 INFO L231 Difference]: Finished difference. Result has 227 places, 422 transitions, 7143 flow [2024-06-27 22:03:25,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6644, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7143, PETRI_PLACES=227, PETRI_TRANSITIONS=422} [2024-06-27 22:03:25,432 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 171 predicate places. [2024-06-27 22:03:25,432 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 422 transitions, 7143 flow [2024-06-27 22:03:25,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:25,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:25,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:25,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 22:03:25,433 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:25,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1852622617, now seen corresponding path program 9 times [2024-06-27 22:03:25,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:25,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180679527] [2024-06-27 22:03:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:25,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180679527] [2024-06-27 22:03:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180679527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:27,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:27,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:27,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668585859] [2024-06-27 22:03:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:27,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:27,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:27,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:27,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 422 transitions, 7143 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:27,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:27,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:27,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:30,015 INFO L124 PetriNetUnfolderBase]: 8149/12355 cut-off events. [2024-06-27 22:03:30,015 INFO L125 PetriNetUnfolderBase]: For 288828/288840 co-relation queries the response was YES. [2024-06-27 22:03:30,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70329 conditions, 12355 events. 8149/12355 cut-off events. For 288828/288840 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 77381 event pairs, 1513 based on Foata normal form. 12/12221 useless extension candidates. Maximal degree in co-relation 70256. Up to 8657 conditions per place. [2024-06-27 22:03:30,131 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 260 selfloop transitions, 231 changer transitions 0/501 dead transitions. [2024-06-27 22:03:30,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 501 transitions, 8790 flow [2024-06-27 22:03:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:03:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:03:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 22:03:30,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 22:03:30,132 INFO L175 Difference]: Start difference. First operand has 227 places, 422 transitions, 7143 flow. Second operand 9 states and 245 transitions. [2024-06-27 22:03:30,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 501 transitions, 8790 flow [2024-06-27 22:03:30,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 501 transitions, 8509 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 22:03:30,842 INFO L231 Difference]: Finished difference. Result has 231 places, 425 transitions, 7375 flow [2024-06-27 22:03:30,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6865, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7375, PETRI_PLACES=231, PETRI_TRANSITIONS=425} [2024-06-27 22:03:30,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-06-27 22:03:30,843 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 425 transitions, 7375 flow [2024-06-27 22:03:30,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:30,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:30,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:30,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 22:03:30,844 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:30,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash 803269139, now seen corresponding path program 10 times [2024-06-27 22:03:30,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:30,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512555558] [2024-06-27 22:03:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:30,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:32,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:32,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512555558] [2024-06-27 22:03:32,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512555558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:32,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:32,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90286155] [2024-06-27 22:03:32,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:32,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:32,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:32,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:32,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:32,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:32,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 425 transitions, 7375 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:32,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:32,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:32,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:35,283 INFO L124 PetriNetUnfolderBase]: 8139/12361 cut-off events. [2024-06-27 22:03:35,284 INFO L125 PetriNetUnfolderBase]: For 307410/307422 co-relation queries the response was YES. [2024-06-27 22:03:35,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70620 conditions, 12361 events. 8139/12361 cut-off events. For 307410/307422 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 77483 event pairs, 1539 based on Foata normal form. 12/12220 useless extension candidates. Maximal degree in co-relation 70546. Up to 8649 conditions per place. [2024-06-27 22:03:35,412 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 243 selfloop transitions, 242 changer transitions 0/495 dead transitions. [2024-06-27 22:03:35,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 495 transitions, 8806 flow [2024-06-27 22:03:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:03:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:03:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 22:03:35,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-06-27 22:03:35,414 INFO L175 Difference]: Start difference. First operand has 231 places, 425 transitions, 7375 flow. Second operand 9 states and 242 transitions. [2024-06-27 22:03:35,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 495 transitions, 8806 flow [2024-06-27 22:03:36,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 495 transitions, 8235 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 22:03:36,293 INFO L231 Difference]: Finished difference. Result has 233 places, 425 transitions, 7296 flow [2024-06-27 22:03:36,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7296, PETRI_PLACES=233, PETRI_TRANSITIONS=425} [2024-06-27 22:03:36,294 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 177 predicate places. [2024-06-27 22:03:36,294 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 425 transitions, 7296 flow [2024-06-27 22:03:36,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:36,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:36,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:36,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 22:03:36,294 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:36,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1823554565, now seen corresponding path program 2 times [2024-06-27 22:03:36,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250797470] [2024-06-27 22:03:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:36,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:37,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250797470] [2024-06-27 22:03:37,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250797470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:37,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:37,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:03:37,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729249017] [2024-06-27 22:03:37,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:37,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:03:37,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:03:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:03:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 22:03:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 425 transitions, 7296 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 22:03:37,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:37,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 22:03:37,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:39,661 INFO L124 PetriNetUnfolderBase]: 7130/11724 cut-off events. [2024-06-27 22:03:39,662 INFO L125 PetriNetUnfolderBase]: For 302468/302689 co-relation queries the response was YES. [2024-06-27 22:03:39,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63475 conditions, 11724 events. 7130/11724 cut-off events. For 302468/302689 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 81920 event pairs, 2237 based on Foata normal form. 109/11485 useless extension candidates. Maximal degree in co-relation 63400. Up to 9753 conditions per place. [2024-06-27 22:03:39,802 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 305 selfloop transitions, 49 changer transitions 0/450 dead transitions. [2024-06-27 22:03:39,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 450 transitions, 8226 flow [2024-06-27 22:03:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:03:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:03:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 22:03:39,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4828571428571429 [2024-06-27 22:03:39,803 INFO L175 Difference]: Start difference. First operand has 233 places, 425 transitions, 7296 flow. Second operand 7 states and 169 transitions. [2024-06-27 22:03:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 450 transitions, 8226 flow [2024-06-27 22:03:40,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 450 transitions, 7615 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 22:03:40,431 INFO L231 Difference]: Finished difference. Result has 233 places, 433 transitions, 6878 flow [2024-06-27 22:03:40,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6878, PETRI_PLACES=233, PETRI_TRANSITIONS=433} [2024-06-27 22:03:40,432 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 177 predicate places. [2024-06-27 22:03:40,432 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 433 transitions, 6878 flow [2024-06-27 22:03:40,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 22:03:40,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:40,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:40,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 22:03:40,433 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:40,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1675666967, now seen corresponding path program 2 times [2024-06-27 22:03:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044153267] [2024-06-27 22:03:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:41,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:41,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044153267] [2024-06-27 22:03:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044153267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:41,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:41,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696031279] [2024-06-27 22:03:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:41,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:41,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:42,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:42,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 433 transitions, 6878 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:42,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:42,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:42,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:44,671 INFO L124 PetriNetUnfolderBase]: 8329/13273 cut-off events. [2024-06-27 22:03:44,671 INFO L125 PetriNetUnfolderBase]: For 318689/318693 co-relation queries the response was YES. [2024-06-27 22:03:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72175 conditions, 13273 events. 8329/13273 cut-off events. For 318689/318693 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 89222 event pairs, 2152 based on Foata normal form. 6/12945 useless extension candidates. Maximal degree in co-relation 72099. Up to 11404 conditions per place. [2024-06-27 22:03:44,833 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 436 selfloop transitions, 83 changer transitions 0/529 dead transitions. [2024-06-27 22:03:44,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 529 transitions, 8467 flow [2024-06-27 22:03:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:03:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:03:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 22:03:44,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 22:03:44,834 INFO L175 Difference]: Start difference. First operand has 233 places, 433 transitions, 6878 flow. Second operand 10 states and 258 transitions. [2024-06-27 22:03:44,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 529 transitions, 8467 flow [2024-06-27 22:03:45,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 529 transitions, 8365 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 22:03:45,666 INFO L231 Difference]: Finished difference. Result has 242 places, 462 transitions, 7309 flow [2024-06-27 22:03:45,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7309, PETRI_PLACES=242, PETRI_TRANSITIONS=462} [2024-06-27 22:03:45,667 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 186 predicate places. [2024-06-27 22:03:45,667 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 462 transitions, 7309 flow [2024-06-27 22:03:45,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:45,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:45,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:45,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 22:03:45,668 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:45,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:45,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1746164503, now seen corresponding path program 3 times [2024-06-27 22:03:45,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:45,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316102964] [2024-06-27 22:03:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:45,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:46,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:46,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316102964] [2024-06-27 22:03:46,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316102964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:46,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:46,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:46,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122193171] [2024-06-27 22:03:46,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:46,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:46,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:46,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 462 transitions, 7309 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:46,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:46,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:46,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:49,529 INFO L124 PetriNetUnfolderBase]: 8660/13775 cut-off events. [2024-06-27 22:03:49,529 INFO L125 PetriNetUnfolderBase]: For 334144/334156 co-relation queries the response was YES. [2024-06-27 22:03:49,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75591 conditions, 13775 events. 8660/13775 cut-off events. For 334144/334156 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 92876 event pairs, 2244 based on Foata normal form. 14/13446 useless extension candidates. Maximal degree in co-relation 75511. Up to 11628 conditions per place. [2024-06-27 22:03:49,697 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 456 selfloop transitions, 159 changer transitions 0/625 dead transitions. [2024-06-27 22:03:49,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 625 transitions, 9877 flow [2024-06-27 22:03:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 22:03:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 22:03:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 357 transitions. [2024-06-27 22:03:49,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 22:03:49,698 INFO L175 Difference]: Start difference. First operand has 242 places, 462 transitions, 7309 flow. Second operand 14 states and 357 transitions. [2024-06-27 22:03:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 625 transitions, 9877 flow [2024-06-27 22:03:50,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 625 transitions, 9620 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 22:03:50,784 INFO L231 Difference]: Finished difference. Result has 257 places, 528 transitions, 8345 flow [2024-06-27 22:03:50,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=7116, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8345, PETRI_PLACES=257, PETRI_TRANSITIONS=528} [2024-06-27 22:03:50,786 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 201 predicate places. [2024-06-27 22:03:50,786 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 528 transitions, 8345 flow [2024-06-27 22:03:50,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:50,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:50,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:50,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 22:03:50,787 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:50,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1391984923, now seen corresponding path program 11 times [2024-06-27 22:03:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:50,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489489779] [2024-06-27 22:03:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:50,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:51,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:51,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489489779] [2024-06-27 22:03:51,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489489779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:51,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047483733] [2024-06-27 22:03:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:51,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:51,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:51,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:51,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 528 transitions, 8345 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:51,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:51,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:51,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:03:54,774 INFO L124 PetriNetUnfolderBase]: 9263/15043 cut-off events. [2024-06-27 22:03:54,775 INFO L125 PetriNetUnfolderBase]: For 379632/379646 co-relation queries the response was YES. [2024-06-27 22:03:54,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81910 conditions, 15043 events. 9263/15043 cut-off events. For 379632/379646 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 104301 event pairs, 1901 based on Foata normal form. 13/14596 useless extension candidates. Maximal degree in co-relation 81825. Up to 9747 conditions per place. [2024-06-27 22:03:54,995 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 268 selfloop transitions, 377 changer transitions 0/655 dead transitions. [2024-06-27 22:03:54,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 655 transitions, 10820 flow [2024-06-27 22:03:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:03:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:03:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-27 22:03:54,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-27 22:03:54,996 INFO L175 Difference]: Start difference. First operand has 257 places, 528 transitions, 8345 flow. Second operand 10 states and 274 transitions. [2024-06-27 22:03:54,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 655 transitions, 10820 flow [2024-06-27 22:03:56,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 655 transitions, 10437 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-27 22:03:56,207 INFO L231 Difference]: Finished difference. Result has 261 places, 579 transitions, 9401 flow [2024-06-27 22:03:56,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=7962, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9401, PETRI_PLACES=261, PETRI_TRANSITIONS=579} [2024-06-27 22:03:56,208 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 205 predicate places. [2024-06-27 22:03:56,208 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 579 transitions, 9401 flow [2024-06-27 22:03:56,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:56,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:03:56,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:03:56,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 22:03:56,209 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:03:56,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:03:56,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1369670317, now seen corresponding path program 4 times [2024-06-27 22:03:56,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:03:56,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854946591] [2024-06-27 22:03:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:03:56,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:03:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:03:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:03:57,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:03:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854946591] [2024-06-27 22:03:57,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854946591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:03:57,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:03:57,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:03:57,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912799858] [2024-06-27 22:03:57,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:03:57,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:03:57,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:03:57,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:03:57,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:03:57,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:03:57,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 579 transitions, 9401 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:03:57,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:03:57,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:03:57,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:04:00,493 INFO L124 PetriNetUnfolderBase]: 9531/15277 cut-off events. [2024-06-27 22:04:00,493 INFO L125 PetriNetUnfolderBase]: For 420730/420738 co-relation queries the response was YES. [2024-06-27 22:04:00,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87369 conditions, 15277 events. 9531/15277 cut-off events. For 420730/420738 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 105790 event pairs, 2395 based on Foata normal form. 11/14895 useless extension candidates. Maximal degree in co-relation 87286. Up to 12883 conditions per place. [2024-06-27 22:04:00,668 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 532 selfloop transitions, 157 changer transitions 0/699 dead transitions. [2024-06-27 22:04:00,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 699 transitions, 11706 flow [2024-06-27 22:04:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:04:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:04:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 22:04:00,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 22:04:00,669 INFO L175 Difference]: Start difference. First operand has 261 places, 579 transitions, 9401 flow. Second operand 10 states and 258 transitions. [2024-06-27 22:04:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 699 transitions, 11706 flow [2024-06-27 22:04:01,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 699 transitions, 11062 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 22:04:01,543 INFO L231 Difference]: Finished difference. Result has 266 places, 632 transitions, 9822 flow [2024-06-27 22:04:01,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=8777, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9822, PETRI_PLACES=266, PETRI_TRANSITIONS=632} [2024-06-27 22:04:01,545 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-06-27 22:04:01,545 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 632 transitions, 9822 flow [2024-06-27 22:04:01,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:01,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:04:01,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:04:01,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 22:04:01,546 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:04:01,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:04:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1463185483, now seen corresponding path program 5 times [2024-06-27 22:04:01,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:04:01,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881373585] [2024-06-27 22:04:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:04:01,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:04:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:04:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:04:02,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:04:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881373585] [2024-06-27 22:04:02,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881373585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:04:02,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:04:02,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:04:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099740230] [2024-06-27 22:04:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:04:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:04:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:04:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:04:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:04:02,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:04:02,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 632 transitions, 9822 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:02,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:04:02,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:04:02,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:04:06,307 INFO L124 PetriNetUnfolderBase]: 9892/15886 cut-off events. [2024-06-27 22:04:06,307 INFO L125 PetriNetUnfolderBase]: For 418336/418342 co-relation queries the response was YES. [2024-06-27 22:04:06,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89175 conditions, 15886 events. 9892/15886 cut-off events. For 418336/418342 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 111130 event pairs, 2316 based on Foata normal form. 9/15485 useless extension candidates. Maximal degree in co-relation 89090. Up to 13256 conditions per place. [2024-06-27 22:04:06,521 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 557 selfloop transitions, 213 changer transitions 0/780 dead transitions. [2024-06-27 22:04:06,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 780 transitions, 12873 flow [2024-06-27 22:04:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:04:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:04:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 22:04:06,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 22:04:06,522 INFO L175 Difference]: Start difference. First operand has 266 places, 632 transitions, 9822 flow. Second operand 10 states and 258 transitions. [2024-06-27 22:04:06,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 780 transitions, 12873 flow [2024-06-27 22:04:07,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 780 transitions, 12412 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 22:04:07,820 INFO L231 Difference]: Finished difference. Result has 273 places, 716 transitions, 11225 flow [2024-06-27 22:04:07,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=9458, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11225, PETRI_PLACES=273, PETRI_TRANSITIONS=716} [2024-06-27 22:04:07,822 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 217 predicate places. [2024-06-27 22:04:07,822 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 716 transitions, 11225 flow [2024-06-27 22:04:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:07,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:04:07,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:04:07,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 22:04:07,823 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:04:07,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:04:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1605414289, now seen corresponding path program 12 times [2024-06-27 22:04:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:04:07,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109338331] [2024-06-27 22:04:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:04:07,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:04:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:04:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:04:09,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:04:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109338331] [2024-06-27 22:04:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109338331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:04:09,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:04:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:04:09,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041259845] [2024-06-27 22:04:09,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:04:09,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:04:09,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:04:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:04:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:04:09,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:04:09,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 716 transitions, 11225 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:09,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:04:09,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:04:09,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:04:12,857 INFO L124 PetriNetUnfolderBase]: 10970/17940 cut-off events. [2024-06-27 22:04:12,857 INFO L125 PetriNetUnfolderBase]: For 463339/463353 co-relation queries the response was YES. [2024-06-27 22:04:13,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98053 conditions, 17940 events. 10970/17940 cut-off events. For 463339/463353 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 129479 event pairs, 1931 based on Foata normal form. 15/17395 useless extension candidates. Maximal degree in co-relation 97965. Up to 11462 conditions per place. [2024-06-27 22:04:13,153 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 429 selfloop transitions, 478 changer transitions 0/917 dead transitions. [2024-06-27 22:04:13,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 917 transitions, 15356 flow [2024-06-27 22:04:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:04:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:04:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-27 22:04:13,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552 [2024-06-27 22:04:13,154 INFO L175 Difference]: Start difference. First operand has 273 places, 716 transitions, 11225 flow. Second operand 10 states and 276 transitions. [2024-06-27 22:04:13,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 917 transitions, 15356 flow [2024-06-27 22:04:14,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 917 transitions, 15087 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 22:04:14,877 INFO L231 Difference]: Finished difference. Result has 280 places, 828 transitions, 13416 flow [2024-06-27 22:04:14,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=10956, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13416, PETRI_PLACES=280, PETRI_TRANSITIONS=828} [2024-06-27 22:04:14,878 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 224 predicate places. [2024-06-27 22:04:14,878 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 828 transitions, 13416 flow [2024-06-27 22:04:14,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:14,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:04:14,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:04:14,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 22:04:14,879 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:04:14,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:04:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1610228899, now seen corresponding path program 13 times [2024-06-27 22:04:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:04:14,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737057096] [2024-06-27 22:04:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:04:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:04:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:04:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:04:16,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:04:16,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737057096] [2024-06-27 22:04:16,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737057096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:04:16,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:04:16,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:04:16,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801316531] [2024-06-27 22:04:16,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:04:16,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:04:16,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:04:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:04:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:04:16,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:04:16,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 828 transitions, 13416 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:16,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:04:16,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:04:16,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:04:20,292 INFO L124 PetriNetUnfolderBase]: 11300/18391 cut-off events. [2024-06-27 22:04:20,292 INFO L125 PetriNetUnfolderBase]: For 504649/504663 co-relation queries the response was YES. [2024-06-27 22:04:20,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105644 conditions, 18391 events. 11300/18391 cut-off events. For 504649/504663 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 132524 event pairs, 1950 based on Foata normal form. 15/17851 useless extension candidates. Maximal degree in co-relation 105553. Up to 11740 conditions per place. [2024-06-27 22:04:20,604 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 453 selfloop transitions, 486 changer transitions 0/949 dead transitions. [2024-06-27 22:04:20,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 949 transitions, 16798 flow [2024-06-27 22:04:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:04:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:04:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-06-27 22:04:20,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554 [2024-06-27 22:04:20,606 INFO L175 Difference]: Start difference. First operand has 280 places, 828 transitions, 13416 flow. Second operand 10 states and 277 transitions. [2024-06-27 22:04:20,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 949 transitions, 16798 flow [2024-06-27 22:04:22,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 949 transitions, 16134 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 22:04:22,818 INFO L231 Difference]: Finished difference. Result has 285 places, 862 transitions, 14279 flow [2024-06-27 22:04:22,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=12784, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14279, PETRI_PLACES=285, PETRI_TRANSITIONS=862} [2024-06-27 22:04:22,819 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 229 predicate places. [2024-06-27 22:04:22,819 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 862 transitions, 14279 flow [2024-06-27 22:04:22,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:22,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:04:22,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:04:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 22:04:22,820 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:04:22,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:04:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 922957039, now seen corresponding path program 14 times [2024-06-27 22:04:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:04:22,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559836806] [2024-06-27 22:04:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:04:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:04:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:04:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:04:24,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:04:24,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559836806] [2024-06-27 22:04:24,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559836806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:04:24,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:04:24,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:04:24,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573305615] [2024-06-27 22:04:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:04:24,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:04:24,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:04:24,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:04:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:04:24,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:04:24,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 862 transitions, 14279 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:24,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:04:24,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:04:24,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:04:29,201 INFO L124 PetriNetUnfolderBase]: 11284/18359 cut-off events. [2024-06-27 22:04:29,201 INFO L125 PetriNetUnfolderBase]: For 531633/531647 co-relation queries the response was YES. [2024-06-27 22:04:29,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105399 conditions, 18359 events. 11284/18359 cut-off events. For 531633/531647 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 132182 event pairs, 1928 based on Foata normal form. 15/17823 useless extension candidates. Maximal degree in co-relation 105308. Up to 11727 conditions per place. [2024-06-27 22:04:29,478 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 445 selfloop transitions, 492 changer transitions 0/947 dead transitions. [2024-06-27 22:04:29,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 947 transitions, 17004 flow [2024-06-27 22:04:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:04:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:04:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 22:04:29,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 22:04:29,480 INFO L175 Difference]: Start difference. First operand has 285 places, 862 transitions, 14279 flow. Second operand 10 states and 273 transitions. [2024-06-27 22:04:29,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 947 transitions, 17004 flow [2024-06-27 22:04:31,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 947 transitions, 16356 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 22:04:31,129 INFO L231 Difference]: Finished difference. Result has 290 places, 862 transitions, 14635 flow [2024-06-27 22:04:31,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=13631, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14635, PETRI_PLACES=290, PETRI_TRANSITIONS=862} [2024-06-27 22:04:31,131 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 234 predicate places. [2024-06-27 22:04:31,131 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 862 transitions, 14635 flow [2024-06-27 22:04:31,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:31,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:04:31,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:04:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 22:04:31,132 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:04:31,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:04:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2028801621, now seen corresponding path program 15 times [2024-06-27 22:04:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:04:31,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917760397] [2024-06-27 22:04:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:04:31,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:04:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:04:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:04:32,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:04:32,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917760397] [2024-06-27 22:04:32,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917760397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:04:32,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:04:32,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:04:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623069202] [2024-06-27 22:04:32,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:04:32,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:04:32,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:04:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:04:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:04:32,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:04:32,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 862 transitions, 14635 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:32,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:04:32,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:04:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:04:38,197 INFO L124 PetriNetUnfolderBase]: 12812/20261 cut-off events. [2024-06-27 22:04:38,198 INFO L125 PetriNetUnfolderBase]: For 603091/603105 co-relation queries the response was YES. [2024-06-27 22:04:38,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117787 conditions, 20261 events. 12812/20261 cut-off events. For 603091/603105 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 145850 event pairs, 2080 based on Foata normal form. 15/19833 useless extension candidates. Maximal degree in co-relation 117695. Up to 13024 conditions per place. [2024-06-27 22:04:38,503 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 446 selfloop transitions, 679 changer transitions 0/1135 dead transitions. [2024-06-27 22:04:38,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1135 transitions, 20612 flow [2024-06-27 22:04:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:04:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:04:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 22:04:38,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 22:04:38,505 INFO L175 Difference]: Start difference. First operand has 290 places, 862 transitions, 14635 flow. Second operand 10 states and 273 transitions. [2024-06-27 22:04:38,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1135 transitions, 20612 flow [2024-06-27 22:04:40,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1135 transitions, 19337 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 22:04:40,815 INFO L231 Difference]: Finished difference. Result has 295 places, 1044 transitions, 17759 flow [2024-06-27 22:04:40,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=13710, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=497, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17759, PETRI_PLACES=295, PETRI_TRANSITIONS=1044} [2024-06-27 22:04:40,816 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 239 predicate places. [2024-06-27 22:04:40,816 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 1044 transitions, 17759 flow [2024-06-27 22:04:40,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:40,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:04:40,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:04:40,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 22:04:40,817 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:04:40,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:04:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2024153481, now seen corresponding path program 16 times [2024-06-27 22:04:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:04:40,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197924045] [2024-06-27 22:04:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:04:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:04:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:04:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:04:42,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:04:42,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197924045] [2024-06-27 22:04:42,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197924045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:04:42,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:04:42,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:04:42,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225898449] [2024-06-27 22:04:42,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:04:42,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:04:42,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:04:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:04:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:04:42,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:04:42,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1044 transitions, 17759 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:42,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:04:42,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:04:42,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:04:48,224 INFO L124 PetriNetUnfolderBase]: 13194/20774 cut-off events. [2024-06-27 22:04:48,224 INFO L125 PetriNetUnfolderBase]: For 655284/655298 co-relation queries the response was YES. [2024-06-27 22:04:48,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123397 conditions, 20774 events. 13194/20774 cut-off events. For 655284/655298 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 148981 event pairs, 2174 based on Foata normal form. 17/20376 useless extension candidates. Maximal degree in co-relation 123302. Up to 13341 conditions per place. [2024-06-27 22:04:48,548 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 479 selfloop transitions, 687 changer transitions 0/1176 dead transitions. [2024-06-27 22:04:48,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1176 transitions, 21871 flow [2024-06-27 22:04:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:04:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:04:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-06-27 22:04:48,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 22:04:48,550 INFO L175 Difference]: Start difference. First operand has 295 places, 1044 transitions, 17759 flow. Second operand 10 states and 275 transitions. [2024-06-27 22:04:48,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1176 transitions, 21871 flow [2024-06-27 22:04:51,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1176 transitions, 21031 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 22:04:51,096 INFO L231 Difference]: Finished difference. Result has 301 places, 1080 transitions, 19081 flow [2024-06-27 22:04:51,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=16951, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19081, PETRI_PLACES=301, PETRI_TRANSITIONS=1080} [2024-06-27 22:04:51,097 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 245 predicate places. [2024-06-27 22:04:51,097 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1080 transitions, 19081 flow [2024-06-27 22:04:51,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:51,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:04:51,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:04:51,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 22:04:51,098 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:04:51,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:04:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2024159991, now seen corresponding path program 17 times [2024-06-27 22:04:51,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:04:51,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105610] [2024-06-27 22:04:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:04:51,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:04:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:04:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:04:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:04:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105610] [2024-06-27 22:04:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:04:52,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:04:52,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:04:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814421944] [2024-06-27 22:04:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:04:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:04:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:04:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:04:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:04:52,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 22:04:52,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1080 transitions, 19081 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:04:52,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:04:52,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 22:04:52,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand