./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix011.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix011.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:28:45,892 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:28:45,966 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:28:45,973 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:28:45,974 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:28:46,002 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:28:46,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:28:46,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:28:46,005 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:28:46,010 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:28:46,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:28:46,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:28:46,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:28:46,013 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:28:46,013 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:28:46,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:28:46,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:28:46,013 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:28:46,014 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:28:46,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:28:46,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:28:46,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:28:46,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:28:46,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:28:46,015 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:28:46,015 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:28:46,015 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:28:46,015 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:28:46,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:28:46,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:28:46,017 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:28:46,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:28:46,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:28:46,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:28:46,018 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:28:46,018 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:28:46,018 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:28:46,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:28:46,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:28:46,019 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:28:46,019 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:28:46,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:28:46,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:28:46,019 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:28:46,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:28:46,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:28:46,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:28:46,248 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:28:46,249 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:28:46,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-21 18:28:47,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:28:47,566 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:28:47,566 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-21 18:28:47,578 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36135674b/717730d0f8224fe3924521f5f24b0e0d/FLAG450ad5bbb [2024-06-21 18:28:47,593 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36135674b/717730d0f8224fe3924521f5f24b0e0d [2024-06-21 18:28:47,595 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:28:47,595 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:28:47,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix011.opt.yml/witness.yml [2024-06-21 18:28:47,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:28:47,670 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:28:47,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:28:47,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:28:47,675 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:28:47,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:28:47" (1/2) ... [2024-06-21 18:28:47,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e5a239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:28:47, skipping insertion in model container [2024-06-21 18:28:47,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:28:47" (1/2) ... [2024-06-21 18:28:47,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@104b9e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:28:47, skipping insertion in model container [2024-06-21 18:28:47,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:28:47" (2/2) ... [2024-06-21 18:28:47,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e5a239 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:47, skipping insertion in model container [2024-06-21 18:28:47,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:28:47" (2/2) ... [2024-06-21 18:28:47,680 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:28:47,701 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:28:47,702 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((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_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_p2_EBX) - (long long )a >= 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) [2024-06-21 18:28:47,703 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((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_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_p2_EBX) - (long long )a >= 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) [2024-06-21 18:28:47,703 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((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_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_p2_EBX) - (long long )a >= 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) [2024-06-21 18:28:47,703 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:28:47,703 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 18:28:47,743 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:28:48,049 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:28:48,062 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:28:48,203 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:28:48,239 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:28:48,240 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48 WrapperNode [2024-06-21 18:28:48,240 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:28:48,241 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:28:48,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:28:48,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:28:48,246 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 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,259 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 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,293 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-21 18:28:48,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:28:48,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:28:48,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:28:48,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:28:48,310 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,315 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,363 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:28:48,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,393 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:28:48,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:28:48,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:28:48,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:28:48,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (1/1) ... [2024-06-21 18:28:48,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:28:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:28:48,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:28:48,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:28:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:28:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:28:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:28:48,510 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:28:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:28:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:28:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:28:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:28:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:28:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:28:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:28:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:28:48,513 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:28:48,614 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:28:48,616 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:28:48,997 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:28:48,997 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:28:49,182 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:28:49,182 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:28:49,182 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:28:49 BoogieIcfgContainer [2024-06-21 18:28:49,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:28:49,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:28:49,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:28:49,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:28:49,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:28:47" (1/4) ... [2024-06-21 18:28:49,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bbb4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:28:49, skipping insertion in model container [2024-06-21 18:28:49,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:28:47" (2/4) ... [2024-06-21 18:28:49,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bbb4a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:28:49, skipping insertion in model container [2024-06-21 18:28:49,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:28:48" (3/4) ... [2024-06-21 18:28:49,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bbb4a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:28:49, skipping insertion in model container [2024-06-21 18:28:49,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:28:49" (4/4) ... [2024-06-21 18:28:49,195 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-06-21 18:28:49,211 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:28:49,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:28:49,211 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:28:49,256 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:28:49,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 18:28:49,314 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 18:28:49,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:28:49,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:28:49,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 18:28:49,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 18:28:49,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:28:49,339 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;@6fa86e74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:28:49,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:28:49,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:28:49,344 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:28:49,344 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:28:49,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:49,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:28:49,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:28:49,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash 401253807, now seen corresponding path program 1 times [2024-06-21 18:28:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:49,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884475874] [2024-06-21 18:28:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:49,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:50,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:50,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884475874] [2024-06-21 18:28:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884475874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:50,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:50,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:28:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695067099] [2024-06-21 18:28:50,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:50,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:28:50,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:28:50,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:28:50,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 18:28:50,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:50,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:50,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 18:28:50,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:51,196 INFO L124 PetriNetUnfolderBase]: 1359/2149 cut-off events. [2024-06-21 18:28:51,196 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 18:28:51,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4263 conditions, 2149 events. 1359/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11005 event pairs, 941 based on Foata normal form. 1/2088 useless extension candidates. Maximal degree in co-relation 4251. Up to 2029 conditions per place. [2024-06-21 18:28:51,213 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 18:28:51,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-21 18:28:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:28:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:28:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-21 18:28:51,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-21 18:28:51,223 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-21 18:28:51,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-21 18:28:51,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:28:51,227 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 18:28:51,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 18:28:51,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 18:28:51,231 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 18:28:51,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:51,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:51,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:28:51,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:28:51,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash -942118130, now seen corresponding path program 1 times [2024-06-21 18:28:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709283635] [2024-06-21 18:28:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:51,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:52,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709283635] [2024-06-21 18:28:52,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709283635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:52,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:28:52,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344213035] [2024-06-21 18:28:52,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:52,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:28:52,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:28:52,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:28:52,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:28:52,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:52,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:52,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:28:52,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:52,861 INFO L124 PetriNetUnfolderBase]: 1560/2392 cut-off events. [2024-06-21 18:28:52,861 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-06-21 18:28:52,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5408 conditions, 2392 events. 1560/2392 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11896 event pairs, 930 based on Foata normal form. 3/2392 useless extension candidates. Maximal degree in co-relation 5396. Up to 2302 conditions per place. [2024-06-21 18:28:52,873 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 18:28:52,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-21 18:28:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:28:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:28:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 18:28:52,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 18:28:52,875 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-21 18:28:52,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-21 18:28:52,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:28:52,877 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 18:28:52,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 18:28:52,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 18:28:52,878 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 18:28:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:52,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:52,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:52,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:28:52,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:28:52,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash 859110040, now seen corresponding path program 1 times [2024-06-21 18:28:52,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:52,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161211919] [2024-06-21 18:28:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:52,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:54,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161211919] [2024-06-21 18:28:54,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161211919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:54,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:54,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:28:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618988579] [2024-06-21 18:28:54,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:28:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:28:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:28:54,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:28:54,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:54,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:54,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:28:54,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:54,594 INFO L124 PetriNetUnfolderBase]: 1568/2407 cut-off events. [2024-06-21 18:28:54,594 INFO L125 PetriNetUnfolderBase]: For 1340/1340 co-relation queries the response was YES. [2024-06-21 18:28:54,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6040 conditions, 2407 events. 1568/2407 cut-off events. For 1340/1340 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12042 event pairs, 663 based on Foata normal form. 5/2405 useless extension candidates. Maximal degree in co-relation 6026. Up to 2248 conditions per place. [2024-06-21 18:28:54,606 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 18:28:54,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2024-06-21 18:28:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:28:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:28:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 18:28:54,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-21 18:28:54,611 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 133 transitions. [2024-06-21 18:28:54,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2024-06-21 18:28:54,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:28:54,615 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-21 18:28:54,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-21 18:28:54,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-21 18:28:54,616 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-21 18:28:54,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:54,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:54,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:54,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:28:54,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:28:54,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1607346961, now seen corresponding path program 1 times [2024-06-21 18:28:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:54,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746324339] [2024-06-21 18:28:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:54,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:56,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746324339] [2024-06-21 18:28:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746324339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:56,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:56,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:28:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49967943] [2024-06-21 18:28:56,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:28:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:28:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:28:56,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:28:56,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:56,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:56,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:28:56,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:56,755 INFO L124 PetriNetUnfolderBase]: 1580/2427 cut-off events. [2024-06-21 18:28:56,755 INFO L125 PetriNetUnfolderBase]: For 3188/3188 co-relation queries the response was YES. [2024-06-21 18:28:56,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7184 conditions, 2427 events. 1580/2427 cut-off events. For 3188/3188 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12169 event pairs, 475 based on Foata normal form. 10/2430 useless extension candidates. Maximal degree in co-relation 7167. Up to 2216 conditions per place. [2024-06-21 18:28:56,767 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 18:28:56,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 501 flow [2024-06-21 18:28:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:28:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:28:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 18:28:56,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 18:28:56,769 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 153 transitions. [2024-06-21 18:28:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 501 flow [2024-06-21 18:28:56,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 493 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 18:28:56,773 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-21 18:28:56,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 18:28:56,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-21 18:28:56,773 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-21 18:28:56,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:56,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:56,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:56,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:28:56,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:28:56,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash 503880689, now seen corresponding path program 1 times [2024-06-21 18:28:56,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:56,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971055711] [2024-06-21 18:28:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:56,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971055711] [2024-06-21 18:28:57,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971055711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:57,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:28:57,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174785105] [2024-06-21 18:28:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:28:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:57,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:28:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:28:57,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:28:57,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:57,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:57,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:28:57,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:28:58,225 INFO L124 PetriNetUnfolderBase]: 1368/2191 cut-off events. [2024-06-21 18:28:58,225 INFO L125 PetriNetUnfolderBase]: For 4119/4119 co-relation queries the response was YES. [2024-06-21 18:28:58,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6962 conditions, 2191 events. 1368/2191 cut-off events. For 4119/4119 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11418 event pairs, 562 based on Foata normal form. 2/2179 useless extension candidates. Maximal degree in co-relation 6941. Up to 2036 conditions per place. [2024-06-21 18:28:58,239 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 18:28:58,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 451 flow [2024-06-21 18:28:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:28:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:28:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 18:28:58,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-21 18:28:58,240 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 106 transitions. [2024-06-21 18:28:58,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 451 flow [2024-06-21 18:28:58,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:28:58,244 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 292 flow [2024-06-21 18:28:58,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-21 18:28:58,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-21 18:28:58,245 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 292 flow [2024-06-21 18:28:58,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:58,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:28:58,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:28:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:28:58,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:28:58,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:28:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1026778578, now seen corresponding path program 1 times [2024-06-21 18:28:58,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:28:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131763136] [2024-06-21 18:28:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:28:58,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:28:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:28:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:28:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:28:59,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131763136] [2024-06-21 18:28:59,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131763136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:28:59,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:28:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:28:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641770486] [2024-06-21 18:28:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:28:59,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:28:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:28:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:28:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:28:59,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:28:59,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:28:59,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:28:59,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:28:59,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:00,189 INFO L124 PetriNetUnfolderBase]: 1651/2537 cut-off events. [2024-06-21 18:29:00,190 INFO L125 PetriNetUnfolderBase]: For 6004/6004 co-relation queries the response was YES. [2024-06-21 18:29:00,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 2537 events. 1651/2537 cut-off events. For 6004/6004 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12634 event pairs, 668 based on Foata normal form. 4/2525 useless extension candidates. Maximal degree in co-relation 8314. Up to 2321 conditions per place. [2024-06-21 18:29:00,212 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 56 selfloop transitions, 29 changer transitions 0/91 dead transitions. [2024-06-21 18:29:00,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 660 flow [2024-06-21 18:29:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:29:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:29:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 18:29:00,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155038759689923 [2024-06-21 18:29:00,214 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 292 flow. Second operand 6 states and 133 transitions. [2024-06-21 18:29:00,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 660 flow [2024-06-21 18:29:00,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 641 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:00,220 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 452 flow [2024-06-21 18:29:00,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2024-06-21 18:29:00,224 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-21 18:29:00,224 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 452 flow [2024-06-21 18:29:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:00,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:00,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:29:00,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:00,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1101942896, now seen corresponding path program 2 times [2024-06-21 18:29:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:00,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823485849] [2024-06-21 18:29:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:00,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823485849] [2024-06-21 18:29:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823485849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:01,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:01,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:29:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390419996] [2024-06-21 18:29:01,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:29:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:29:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:29:01,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:01,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:01,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:01,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:01,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:02,155 INFO L124 PetriNetUnfolderBase]: 1643/2527 cut-off events. [2024-06-21 18:29:02,155 INFO L125 PetriNetUnfolderBase]: For 7476/7478 co-relation queries the response was YES. [2024-06-21 18:29:02,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8725 conditions, 2527 events. 1643/2527 cut-off events. For 7476/7478 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12576 event pairs, 670 based on Foata normal form. 4/2516 useless extension candidates. Maximal degree in co-relation 8696. Up to 2313 conditions per place. [2024-06-21 18:29:02,173 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 48 selfloop transitions, 33 changer transitions 0/87 dead transitions. [2024-06-21 18:29:02,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 696 flow [2024-06-21 18:29:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:29:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:29:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 18:29:02,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:29:02,175 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 452 flow. Second operand 6 states and 129 transitions. [2024-06-21 18:29:02,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 696 flow [2024-06-21 18:29:02,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 667 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 18:29:02,180 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 509 flow [2024-06-21 18:29:02,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-21 18:29:02,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-21 18:29:02,182 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 509 flow [2024-06-21 18:29:02,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:02,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:02,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:02,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:29:02,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:02,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash -765710802, now seen corresponding path program 3 times [2024-06-21 18:29:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:02,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971174212] [2024-06-21 18:29:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:03,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:03,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971174212] [2024-06-21 18:29:03,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971174212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:03,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:03,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:29:03,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233355323] [2024-06-21 18:29:03,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:29:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:29:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:29:03,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:03,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 509 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:03,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:03,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:03,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:03,872 INFO L124 PetriNetUnfolderBase]: 1682/2589 cut-off events. [2024-06-21 18:29:03,873 INFO L125 PetriNetUnfolderBase]: For 9731/9733 co-relation queries the response was YES. [2024-06-21 18:29:03,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9339 conditions, 2589 events. 1682/2589 cut-off events. For 9731/9733 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12921 event pairs, 658 based on Foata normal form. 6/2587 useless extension candidates. Maximal degree in co-relation 9306. Up to 2338 conditions per place. [2024-06-21 18:29:03,887 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 58 selfloop transitions, 45 changer transitions 0/109 dead transitions. [2024-06-21 18:29:03,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 958 flow [2024-06-21 18:29:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:29:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:29:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 18:29:03,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 18:29:03,889 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 509 flow. Second operand 7 states and 147 transitions. [2024-06-21 18:29:03,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 958 flow [2024-06-21 18:29:03,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 897 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 18:29:03,896 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 756 flow [2024-06-21 18:29:03,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=756, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2024-06-21 18:29:03,898 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 18:29:03,899 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 756 flow [2024-06-21 18:29:03,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:03,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:03,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:03,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:29:03,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:03,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1101934960, now seen corresponding path program 1 times [2024-06-21 18:29:03,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:03,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746406376] [2024-06-21 18:29:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:03,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:05,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:05,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746406376] [2024-06-21 18:29:05,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746406376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:05,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:05,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:29:05,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336296380] [2024-06-21 18:29:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:05,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:29:05,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:29:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:29:05,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:05,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 756 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:05,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:05,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:05,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:06,046 INFO L124 PetriNetUnfolderBase]: 1807/2850 cut-off events. [2024-06-21 18:29:06,056 INFO L125 PetriNetUnfolderBase]: For 12857/12859 co-relation queries the response was YES. [2024-06-21 18:29:06,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10609 conditions, 2850 events. 1807/2850 cut-off events. For 12857/12859 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14749 event pairs, 707 based on Foata normal form. 4/2838 useless extension candidates. Maximal degree in co-relation 10572. Up to 2647 conditions per place. [2024-06-21 18:29:06,090 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 89 selfloop transitions, 16 changer transitions 0/111 dead transitions. [2024-06-21 18:29:06,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 1068 flow [2024-06-21 18:29:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:29:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:29:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 18:29:06,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 18:29:06,093 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 756 flow. Second operand 7 states and 139 transitions. [2024-06-21 18:29:06,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 1068 flow [2024-06-21 18:29:06,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 1027 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:06,108 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 815 flow [2024-06-21 18:29:06,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=815, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-06-21 18:29:06,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 18:29:06,109 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 815 flow [2024-06-21 18:29:06,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:06,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:06,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:06,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:29:06,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:06,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 376619089, now seen corresponding path program 1 times [2024-06-21 18:29:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168912634] [2024-06-21 18:29:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:07,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:07,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168912634] [2024-06-21 18:29:07,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168912634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:07,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:07,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:29:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189873001] [2024-06-21 18:29:07,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:07,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:29:07,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:07,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:29:07,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:29:07,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:29:07,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 815 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:07,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:07,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:29:07,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:07,568 INFO L124 PetriNetUnfolderBase]: 1676/2681 cut-off events. [2024-06-21 18:29:07,568 INFO L125 PetriNetUnfolderBase]: For 14330/14351 co-relation queries the response was YES. [2024-06-21 18:29:07,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10462 conditions, 2681 events. 1676/2681 cut-off events. For 14330/14351 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14137 event pairs, 595 based on Foata normal form. 2/2678 useless extension candidates. Maximal degree in co-relation 10422. Up to 2485 conditions per place. [2024-06-21 18:29:07,584 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 84 selfloop transitions, 10 changer transitions 0/102 dead transitions. [2024-06-21 18:29:07,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 102 transitions, 1043 flow [2024-06-21 18:29:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:29:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:29:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-21 18:29:07,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 18:29:07,586 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 815 flow. Second operand 5 states and 102 transitions. [2024-06-21 18:29:07,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 102 transitions, 1043 flow [2024-06-21 18:29:07,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 1004 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:29:07,597 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 828 flow [2024-06-21 18:29:07,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=828, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-21 18:29:07,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 18:29:07,598 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 828 flow [2024-06-21 18:29:07,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:07,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:07,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:07,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:29:07,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:07,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1517484535, now seen corresponding path program 1 times [2024-06-21 18:29:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197822970] [2024-06-21 18:29:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:07,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:09,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:09,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197822970] [2024-06-21 18:29:09,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197822970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:09,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:09,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515622987] [2024-06-21 18:29:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:09,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:09,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:09,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 828 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:09,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:09,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:09,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:10,165 INFO L124 PetriNetUnfolderBase]: 2156/3262 cut-off events. [2024-06-21 18:29:10,165 INFO L125 PetriNetUnfolderBase]: For 20595/20600 co-relation queries the response was YES. [2024-06-21 18:29:10,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13435 conditions, 3262 events. 2156/3262 cut-off events. For 20595/20600 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16087 event pairs, 560 based on Foata normal form. 10/3262 useless extension candidates. Maximal degree in co-relation 13395. Up to 2675 conditions per place. [2024-06-21 18:29:10,185 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 84 selfloop transitions, 61 changer transitions 0/150 dead transitions. [2024-06-21 18:29:10,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 150 transitions, 1478 flow [2024-06-21 18:29:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 18:29:10,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49709302325581395 [2024-06-21 18:29:10,187 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 828 flow. Second operand 8 states and 171 transitions. [2024-06-21 18:29:10,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 150 transitions, 1478 flow [2024-06-21 18:29:10,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 150 transitions, 1448 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:10,203 INFO L231 Difference]: Finished difference. Result has 87 places, 114 transitions, 1116 flow [2024-06-21 18:29:10,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1116, PETRI_PLACES=87, PETRI_TRANSITIONS=114} [2024-06-21 18:29:10,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-21 18:29:10,204 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 114 transitions, 1116 flow [2024-06-21 18:29:10,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:10,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:10,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:10,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:29:10,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:10,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:10,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1889826415, now seen corresponding path program 2 times [2024-06-21 18:29:10,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:10,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942318886] [2024-06-21 18:29:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:11,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942318886] [2024-06-21 18:29:11,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942318886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:11,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:11,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:11,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014745112] [2024-06-21 18:29:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:11,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:11,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:11,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:11,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 1116 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:11,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:11,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:11,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:12,765 INFO L124 PetriNetUnfolderBase]: 2228/3377 cut-off events. [2024-06-21 18:29:12,765 INFO L125 PetriNetUnfolderBase]: For 25991/25993 co-relation queries the response was YES. [2024-06-21 18:29:12,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15278 conditions, 3377 events. 2228/3377 cut-off events. For 25991/25993 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 16799 event pairs, 537 based on Foata normal form. 6/3359 useless extension candidates. Maximal degree in co-relation 15235. Up to 2715 conditions per place. [2024-06-21 18:29:12,786 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 85 selfloop transitions, 77 changer transitions 0/167 dead transitions. [2024-06-21 18:29:12,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 167 transitions, 1841 flow [2024-06-21 18:29:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-21 18:29:12,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:29:12,788 INFO L175 Difference]: Start difference. First operand has 87 places, 114 transitions, 1116 flow. Second operand 8 states and 172 transitions. [2024-06-21 18:29:12,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 167 transitions, 1841 flow [2024-06-21 18:29:12,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 167 transitions, 1767 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:12,810 INFO L231 Difference]: Finished difference. Result has 94 places, 130 transitions, 1386 flow [2024-06-21 18:29:12,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1386, PETRI_PLACES=94, PETRI_TRANSITIONS=130} [2024-06-21 18:29:12,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-21 18:29:12,811 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 130 transitions, 1386 flow [2024-06-21 18:29:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:12,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:12,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:12,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:29:12,812 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:12,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash 342956655, now seen corresponding path program 3 times [2024-06-21 18:29:12,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:12,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065491274] [2024-06-21 18:29:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:12,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:14,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:14,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065491274] [2024-06-21 18:29:14,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065491274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:14,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:14,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544380576] [2024-06-21 18:29:14,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:14,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:14,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 130 transitions, 1386 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:14,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:14,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:14,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:15,503 INFO L124 PetriNetUnfolderBase]: 2250/3410 cut-off events. [2024-06-21 18:29:15,504 INFO L125 PetriNetUnfolderBase]: For 30911/30913 co-relation queries the response was YES. [2024-06-21 18:29:15,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16475 conditions, 3410 events. 2250/3410 cut-off events. For 30911/30913 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 16971 event pairs, 527 based on Foata normal form. 6/3388 useless extension candidates. Maximal degree in co-relation 16427. Up to 2724 conditions per place. [2024-06-21 18:29:15,525 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 84 selfloop transitions, 88 changer transitions 0/177 dead transitions. [2024-06-21 18:29:15,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 177 transitions, 2118 flow [2024-06-21 18:29:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-21 18:29:15,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 18:29:15,527 INFO L175 Difference]: Start difference. First operand has 94 places, 130 transitions, 1386 flow. Second operand 8 states and 172 transitions. [2024-06-21 18:29:15,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 177 transitions, 2118 flow [2024-06-21 18:29:15,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 177 transitions, 2098 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 18:29:15,557 INFO L231 Difference]: Finished difference. Result has 102 places, 140 transitions, 1711 flow [2024-06-21 18:29:15,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1711, PETRI_PLACES=102, PETRI_TRANSITIONS=140} [2024-06-21 18:29:15,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 18:29:15,558 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 140 transitions, 1711 flow [2024-06-21 18:29:15,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:15,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:15,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:15,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:29:15,559 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:15,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash 343223565, now seen corresponding path program 4 times [2024-06-21 18:29:15,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:15,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043443619] [2024-06-21 18:29:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:15,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:17,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:17,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043443619] [2024-06-21 18:29:17,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043443619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:17,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:17,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:17,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824298489] [2024-06-21 18:29:17,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:17,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:17,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:17,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 140 transitions, 1711 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:17,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:17,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:17,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:18,224 INFO L124 PetriNetUnfolderBase]: 2240/3389 cut-off events. [2024-06-21 18:29:18,225 INFO L125 PetriNetUnfolderBase]: For 35795/35797 co-relation queries the response was YES. [2024-06-21 18:29:18,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17196 conditions, 3389 events. 2240/3389 cut-off events. For 35795/35797 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16722 event pairs, 534 based on Foata normal form. 6/3378 useless extension candidates. Maximal degree in co-relation 17143. Up to 2720 conditions per place. [2024-06-21 18:29:18,244 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 74 selfloop transitions, 94 changer transitions 0/173 dead transitions. [2024-06-21 18:29:18,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 173 transitions, 2257 flow [2024-06-21 18:29:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 18:29:18,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-21 18:29:18,246 INFO L175 Difference]: Start difference. First operand has 102 places, 140 transitions, 1711 flow. Second operand 8 states and 169 transitions. [2024-06-21 18:29:18,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 173 transitions, 2257 flow [2024-06-21 18:29:18,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 2106 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 18:29:18,282 INFO L231 Difference]: Finished difference. Result has 106 places, 140 transitions, 1762 flow [2024-06-21 18:29:18,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1762, PETRI_PLACES=106, PETRI_TRANSITIONS=140} [2024-06-21 18:29:18,283 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-21 18:29:18,283 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 140 transitions, 1762 flow [2024-06-21 18:29:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:18,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:18,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:18,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:29:18,284 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:18,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1408645747, now seen corresponding path program 5 times [2024-06-21 18:29:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:18,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125685777] [2024-06-21 18:29:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:19,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125685777] [2024-06-21 18:29:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125685777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:19,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:19,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:19,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552700956] [2024-06-21 18:29:19,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:19,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:19,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:19,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:19,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:19,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:19,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 140 transitions, 1762 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:19,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:19,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:19,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:20,693 INFO L124 PetriNetUnfolderBase]: 2338/3557 cut-off events. [2024-06-21 18:29:20,694 INFO L125 PetriNetUnfolderBase]: For 40222/40227 co-relation queries the response was YES. [2024-06-21 18:29:20,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17978 conditions, 3557 events. 2338/3557 cut-off events. For 40222/40227 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17902 event pairs, 537 based on Foata normal form. 10/3563 useless extension candidates. Maximal degree in co-relation 17923. Up to 2787 conditions per place. [2024-06-21 18:29:20,714 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 109 selfloop transitions, 94 changer transitions 0/208 dead transitions. [2024-06-21 18:29:20,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 208 transitions, 2759 flow [2024-06-21 18:29:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:29:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:29:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 18:29:20,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-21 18:29:20,716 INFO L175 Difference]: Start difference. First operand has 106 places, 140 transitions, 1762 flow. Second operand 9 states and 191 transitions. [2024-06-21 18:29:20,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 208 transitions, 2759 flow [2024-06-21 18:29:20,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 208 transitions, 2489 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 18:29:20,754 INFO L231 Difference]: Finished difference. Result has 112 places, 158 transitions, 1982 flow [2024-06-21 18:29:20,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1982, PETRI_PLACES=112, PETRI_TRANSITIONS=158} [2024-06-21 18:29:20,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 18:29:20,755 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 158 transitions, 1982 flow [2024-06-21 18:29:20,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:20,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:20,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:20,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:29:20,755 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:20,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1209709147, now seen corresponding path program 1 times [2024-06-21 18:29:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:20,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314582570] [2024-06-21 18:29:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314582570] [2024-06-21 18:29:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314582570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:22,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:22,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:29:22,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596894142] [2024-06-21 18:29:22,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:29:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:29:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:29:22,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:29:22,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 158 transitions, 1982 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:22,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:22,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:29:22,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:22,819 INFO L124 PetriNetUnfolderBase]: 1959/3135 cut-off events. [2024-06-21 18:29:22,820 INFO L125 PetriNetUnfolderBase]: For 38853/38863 co-relation queries the response was YES. [2024-06-21 18:29:22,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15803 conditions, 3135 events. 1959/3135 cut-off events. For 38853/38863 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16771 event pairs, 598 based on Foata normal form. 2/3116 useless extension candidates. Maximal degree in co-relation 15745. Up to 2884 conditions per place. [2024-06-21 18:29:22,839 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2024-06-21 18:29:22,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 170 transitions, 2348 flow [2024-06-21 18:29:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:29:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:29:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 18:29:22,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 18:29:22,840 INFO L175 Difference]: Start difference. First operand has 112 places, 158 transitions, 1982 flow. Second operand 6 states and 119 transitions. [2024-06-21 18:29:22,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 170 transitions, 2348 flow [2024-06-21 18:29:22,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 170 transitions, 2237 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:29:22,872 INFO L231 Difference]: Finished difference. Result has 114 places, 161 transitions, 1935 flow [2024-06-21 18:29:22,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1935, PETRI_PLACES=114, PETRI_TRANSITIONS=161} [2024-06-21 18:29:22,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-21 18:29:22,873 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 161 transitions, 1935 flow [2024-06-21 18:29:22,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:22,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:22,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:22,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:29:22,874 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:22,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1021320565, now seen corresponding path program 1 times [2024-06-21 18:29:22,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:22,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781487263] [2024-06-21 18:29:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:24,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:24,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781487263] [2024-06-21 18:29:24,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781487263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:24,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:24,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:29:24,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316856184] [2024-06-21 18:29:24,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:24,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:29:24,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:24,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:29:24,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:29:24,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:24,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 161 transitions, 1935 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:24,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:24,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:24,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:25,356 INFO L124 PetriNetUnfolderBase]: 2187/3395 cut-off events. [2024-06-21 18:29:25,357 INFO L125 PetriNetUnfolderBase]: For 47106/47112 co-relation queries the response was YES. [2024-06-21 18:29:25,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17319 conditions, 3395 events. 2187/3395 cut-off events. For 47106/47112 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17706 event pairs, 612 based on Foata normal form. 10/3383 useless extension candidates. Maximal degree in co-relation 17260. Up to 2978 conditions per place. [2024-06-21 18:29:25,379 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 64 changer transitions 0/184 dead transitions. [2024-06-21 18:29:25,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 2376 flow [2024-06-21 18:29:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 18:29:25,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 18:29:25,381 INFO L175 Difference]: Start difference. First operand has 114 places, 161 transitions, 1935 flow. Second operand 8 states and 158 transitions. [2024-06-21 18:29:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 2376 flow [2024-06-21 18:29:25,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 184 transitions, 2336 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 18:29:25,418 INFO L231 Difference]: Finished difference. Result has 118 places, 163 transitions, 2059 flow [2024-06-21 18:29:25,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2059, PETRI_PLACES=118, PETRI_TRANSITIONS=163} [2024-06-21 18:29:25,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-21 18:29:25,419 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 163 transitions, 2059 flow [2024-06-21 18:29:25,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:25,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:25,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:25,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:29:25,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:25,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1024177525, now seen corresponding path program 2 times [2024-06-21 18:29:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:25,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529845030] [2024-06-21 18:29:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:25,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:26,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529845030] [2024-06-21 18:29:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529845030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:26,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:26,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:29:26,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274622350] [2024-06-21 18:29:26,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:26,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:29:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:26,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:29:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:29:26,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:26,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 163 transitions, 2059 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:26,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:26,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:26,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:27,749 INFO L124 PetriNetUnfolderBase]: 2245/3504 cut-off events. [2024-06-21 18:29:27,750 INFO L125 PetriNetUnfolderBase]: For 52517/52527 co-relation queries the response was YES. [2024-06-21 18:29:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18296 conditions, 3504 events. 2245/3504 cut-off events. For 52517/52527 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18688 event pairs, 618 based on Foata normal form. 6/3483 useless extension candidates. Maximal degree in co-relation 18236. Up to 2976 conditions per place. [2024-06-21 18:29:27,769 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 61 changer transitions 0/191 dead transitions. [2024-06-21 18:29:27,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 191 transitions, 2531 flow [2024-06-21 18:29:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:29:27,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 18:29:27,771 INFO L175 Difference]: Start difference. First operand has 118 places, 163 transitions, 2059 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:29:27,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 191 transitions, 2531 flow [2024-06-21 18:29:27,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 191 transitions, 2395 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:29:27,812 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 2111 flow [2024-06-21 18:29:27,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2111, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2024-06-21 18:29:27,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-21 18:29:27,813 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 2111 flow [2024-06-21 18:29:27,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:27,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:27,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:27,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:29:27,813 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:27,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1887862869, now seen corresponding path program 1 times [2024-06-21 18:29:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610772923] [2024-06-21 18:29:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:29,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610772923] [2024-06-21 18:29:29,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610772923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:29,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:29,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:29,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389534696] [2024-06-21 18:29:29,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:29,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:29,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:29,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:29,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 2111 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:29,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:29,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:29,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:30,357 INFO L124 PetriNetUnfolderBase]: 2625/4044 cut-off events. [2024-06-21 18:29:30,357 INFO L125 PetriNetUnfolderBase]: For 62589/62594 co-relation queries the response was YES. [2024-06-21 18:29:30,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21583 conditions, 4044 events. 2625/4044 cut-off events. For 62589/62594 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21425 event pairs, 595 based on Foata normal form. 8/4042 useless extension candidates. Maximal degree in co-relation 21521. Up to 3113 conditions per place. [2024-06-21 18:29:30,388 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 116 changer transitions 0/239 dead transitions. [2024-06-21 18:29:30,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 239 transitions, 3415 flow [2024-06-21 18:29:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 18:29:30,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145348837209303 [2024-06-21 18:29:30,390 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 2111 flow. Second operand 8 states and 177 transitions. [2024-06-21 18:29:30,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 239 transitions, 3415 flow [2024-06-21 18:29:30,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 239 transitions, 3269 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:29:30,453 INFO L231 Difference]: Finished difference. Result has 126 places, 197 transitions, 2678 flow [2024-06-21 18:29:30,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2678, PETRI_PLACES=126, PETRI_TRANSITIONS=197} [2024-06-21 18:29:30,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 18:29:30,454 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 197 transitions, 2678 flow [2024-06-21 18:29:30,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:30,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:30,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:30,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:29:30,454 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:30,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash -906024435, now seen corresponding path program 2 times [2024-06-21 18:29:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:30,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393149778] [2024-06-21 18:29:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:30,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:31,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:31,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393149778] [2024-06-21 18:29:31,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393149778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:31,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:31,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:31,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031962051] [2024-06-21 18:29:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:31,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:31,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:31,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:31,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:31,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:31,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 197 transitions, 2678 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:31,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:31,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:31,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:33,071 INFO L124 PetriNetUnfolderBase]: 2609/4026 cut-off events. [2024-06-21 18:29:33,071 INFO L125 PetriNetUnfolderBase]: For 68757/68764 co-relation queries the response was YES. [2024-06-21 18:29:33,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22371 conditions, 4026 events. 2609/4026 cut-off events. For 68757/68764 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21341 event pairs, 612 based on Foata normal form. 10/4026 useless extension candidates. Maximal degree in co-relation 22305. Up to 3100 conditions per place. [2024-06-21 18:29:33,097 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 107 selfloop transitions, 122 changer transitions 0/234 dead transitions. [2024-06-21 18:29:33,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 234 transitions, 3432 flow [2024-06-21 18:29:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 18:29:33,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502906976744186 [2024-06-21 18:29:33,101 INFO L175 Difference]: Start difference. First operand has 126 places, 197 transitions, 2678 flow. Second operand 8 states and 173 transitions. [2024-06-21 18:29:33,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 234 transitions, 3432 flow [2024-06-21 18:29:33,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 234 transitions, 3259 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:33,162 INFO L231 Difference]: Finished difference. Result has 133 places, 200 transitions, 2869 flow [2024-06-21 18:29:33,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2869, PETRI_PLACES=133, PETRI_TRANSITIONS=200} [2024-06-21 18:29:33,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-21 18:29:33,163 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 200 transitions, 2869 flow [2024-06-21 18:29:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:33,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:33,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:33,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:29:33,164 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:33,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1887869379, now seen corresponding path program 3 times [2024-06-21 18:29:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:33,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106021544] [2024-06-21 18:29:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:33,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106021544] [2024-06-21 18:29:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106021544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:34,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:34,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631618497] [2024-06-21 18:29:34,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:34,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:34,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:34,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 200 transitions, 2869 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:34,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:34,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:34,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:35,780 INFO L124 PetriNetUnfolderBase]: 2593/4000 cut-off events. [2024-06-21 18:29:35,780 INFO L125 PetriNetUnfolderBase]: For 74330/74335 co-relation queries the response was YES. [2024-06-21 18:29:35,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22674 conditions, 4000 events. 2593/4000 cut-off events. For 74330/74335 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21203 event pairs, 592 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 22603. Up to 3087 conditions per place. [2024-06-21 18:29:35,812 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 107 selfloop transitions, 120 changer transitions 0/232 dead transitions. [2024-06-21 18:29:35,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 232 transitions, 3583 flow [2024-06-21 18:29:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 18:29:35,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49709302325581395 [2024-06-21 18:29:35,815 INFO L175 Difference]: Start difference. First operand has 133 places, 200 transitions, 2869 flow. Second operand 8 states and 171 transitions. [2024-06-21 18:29:35,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 232 transitions, 3583 flow [2024-06-21 18:29:35,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 232 transitions, 3434 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:35,896 INFO L231 Difference]: Finished difference. Result has 138 places, 200 transitions, 2975 flow [2024-06-21 18:29:35,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2975, PETRI_PLACES=138, PETRI_TRANSITIONS=200} [2024-06-21 18:29:35,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 18:29:35,897 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 200 transitions, 2975 flow [2024-06-21 18:29:35,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:35,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:35,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:29:35,900 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:35,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1140374768, now seen corresponding path program 1 times [2024-06-21 18:29:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:35,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19212166] [2024-06-21 18:29:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:36,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:36,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19212166] [2024-06-21 18:29:36,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19212166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:36,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:36,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:29:36,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347087161] [2024-06-21 18:29:36,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:36,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:29:36,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:29:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:29:37,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:37,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 200 transitions, 2975 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:37,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:37,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:37,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:37,822 INFO L124 PetriNetUnfolderBase]: 2382/3755 cut-off events. [2024-06-21 18:29:37,836 INFO L125 PetriNetUnfolderBase]: For 81129/81143 co-relation queries the response was YES. [2024-06-21 18:29:37,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21838 conditions, 3755 events. 2382/3755 cut-off events. For 81129/81143 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20508 event pairs, 647 based on Foata normal form. 6/3746 useless extension candidates. Maximal degree in co-relation 21765. Up to 3485 conditions per place. [2024-06-21 18:29:37,875 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 186 selfloop transitions, 19 changer transitions 0/217 dead transitions. [2024-06-21 18:29:37,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 217 transitions, 3479 flow [2024-06-21 18:29:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:29:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:29:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 18:29:37,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 18:29:37,893 INFO L175 Difference]: Start difference. First operand has 138 places, 200 transitions, 2975 flow. Second operand 7 states and 130 transitions. [2024-06-21 18:29:37,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 217 transitions, 3479 flow [2024-06-21 18:29:37,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 217 transitions, 3286 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 18:29:37,979 INFO L231 Difference]: Finished difference. Result has 142 places, 205 transitions, 2892 flow [2024-06-21 18:29:37,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2892, PETRI_PLACES=142, PETRI_TRANSITIONS=205} [2024-06-21 18:29:37,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-21 18:29:37,980 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 205 transitions, 2892 flow [2024-06-21 18:29:37,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:37,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:37,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:37,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:29:37,981 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:37,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 169202445, now seen corresponding path program 4 times [2024-06-21 18:29:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:37,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387744077] [2024-06-21 18:29:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:37,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:39,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:39,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387744077] [2024-06-21 18:29:39,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387744077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:39,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:39,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:39,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653573890] [2024-06-21 18:29:39,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:39,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:39,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:39,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:39,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 205 transitions, 2892 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:39,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:39,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:39,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:40,938 INFO L124 PetriNetUnfolderBase]: 2634/4071 cut-off events. [2024-06-21 18:29:40,938 INFO L125 PetriNetUnfolderBase]: For 86896/86899 co-relation queries the response was YES. [2024-06-21 18:29:40,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23320 conditions, 4071 events. 2634/4071 cut-off events. For 86896/86899 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21689 event pairs, 567 based on Foata normal form. 8/4061 useless extension candidates. Maximal degree in co-relation 23244. Up to 3126 conditions per place. [2024-06-21 18:29:40,975 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 119 selfloop transitions, 127 changer transitions 0/251 dead transitions. [2024-06-21 18:29:40,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 251 transitions, 3877 flow [2024-06-21 18:29:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 18:29:40,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-21 18:29:40,977 INFO L175 Difference]: Start difference. First operand has 142 places, 205 transitions, 2892 flow. Second operand 8 states and 167 transitions. [2024-06-21 18:29:40,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 251 transitions, 3877 flow [2024-06-21 18:29:41,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 251 transitions, 3776 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:41,071 INFO L231 Difference]: Finished difference. Result has 148 places, 218 transitions, 3303 flow [2024-06-21 18:29:41,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3303, PETRI_PLACES=148, PETRI_TRANSITIONS=218} [2024-06-21 18:29:41,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-21 18:29:41,071 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 218 transitions, 3303 flow [2024-06-21 18:29:41,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:41,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:41,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:41,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:29:41,072 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:41,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1317021461, now seen corresponding path program 5 times [2024-06-21 18:29:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:41,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759025008] [2024-06-21 18:29:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759025008] [2024-06-21 18:29:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759025008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:42,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:42,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535413890] [2024-06-21 18:29:42,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:42,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:42,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:42,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 218 transitions, 3303 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:42,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:42,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:42,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:43,796 INFO L124 PetriNetUnfolderBase]: 2670/4133 cut-off events. [2024-06-21 18:29:43,797 INFO L125 PetriNetUnfolderBase]: For 97122/97125 co-relation queries the response was YES. [2024-06-21 18:29:43,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24503 conditions, 4133 events. 2670/4133 cut-off events. For 97122/97125 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22178 event pairs, 576 based on Foata normal form. 8/4123 useless extension candidates. Maximal degree in co-relation 24424. Up to 3158 conditions per place. [2024-06-21 18:29:43,829 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 133 changer transitions 0/256 dead transitions. [2024-06-21 18:29:43,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 256 transitions, 4189 flow [2024-06-21 18:29:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 18:29:43,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 18:29:43,831 INFO L175 Difference]: Start difference. First operand has 148 places, 218 transitions, 3303 flow. Second operand 8 states and 168 transitions. [2024-06-21 18:29:43,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 256 transitions, 4189 flow [2024-06-21 18:29:43,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 256 transitions, 3999 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 18:29:43,941 INFO L231 Difference]: Finished difference. Result has 151 places, 224 transitions, 3495 flow [2024-06-21 18:29:43,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3495, PETRI_PLACES=151, PETRI_TRANSITIONS=224} [2024-06-21 18:29:43,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-21 18:29:43,942 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 224 transitions, 3495 flow [2024-06-21 18:29:43,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:43,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:43,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:43,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:29:43,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:43,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1308747251, now seen corresponding path program 6 times [2024-06-21 18:29:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:43,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420257332] [2024-06-21 18:29:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:43,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420257332] [2024-06-21 18:29:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420257332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:45,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:45,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:45,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214685316] [2024-06-21 18:29:45,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:45,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:45,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:45,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:45,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 224 transitions, 3495 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:45,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:45,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:45,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:46,565 INFO L124 PetriNetUnfolderBase]: 2654/4111 cut-off events. [2024-06-21 18:29:46,565 INFO L125 PetriNetUnfolderBase]: For 103305/103308 co-relation queries the response was YES. [2024-06-21 18:29:46,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24374 conditions, 4111 events. 2654/4111 cut-off events. For 103305/103308 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 22065 event pairs, 584 based on Foata normal form. 8/4101 useless extension candidates. Maximal degree in co-relation 24294. Up to 3145 conditions per place. [2024-06-21 18:29:46,598 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 103 selfloop transitions, 144 changer transitions 0/252 dead transitions. [2024-06-21 18:29:46,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 252 transitions, 4170 flow [2024-06-21 18:29:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:29:46,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-21 18:29:46,600 INFO L175 Difference]: Start difference. First operand has 151 places, 224 transitions, 3495 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:29:46,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 252 transitions, 4170 flow [2024-06-21 18:29:46,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 252 transitions, 3890 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 18:29:46,729 INFO L231 Difference]: Finished difference. Result has 155 places, 224 transitions, 3516 flow [2024-06-21 18:29:46,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3516, PETRI_PLACES=155, PETRI_TRANSITIONS=224} [2024-06-21 18:29:46,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-21 18:29:46,730 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 224 transitions, 3516 flow [2024-06-21 18:29:46,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:46,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:46,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:46,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:29:46,731 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:46,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1153707248, now seen corresponding path program 2 times [2024-06-21 18:29:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:46,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768221447] [2024-06-21 18:29:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:46,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:47,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:47,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768221447] [2024-06-21 18:29:47,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768221447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:47,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:47,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:29:47,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574577064] [2024-06-21 18:29:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:47,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:29:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:29:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:29:47,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:47,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 224 transitions, 3516 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:47,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:47,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:47,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:48,356 INFO L124 PetriNetUnfolderBase]: 2454/3899 cut-off events. [2024-06-21 18:29:48,356 INFO L125 PetriNetUnfolderBase]: For 106766/106783 co-relation queries the response was YES. [2024-06-21 18:29:48,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23585 conditions, 3899 events. 2454/3899 cut-off events. For 106766/106783 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21780 event pairs, 679 based on Foata normal form. 7/3884 useless extension candidates. Maximal degree in co-relation 23502. Up to 3575 conditions per place. [2024-06-21 18:29:48,386 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 200 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2024-06-21 18:29:48,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 240 transitions, 4117 flow [2024-06-21 18:29:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:29:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:29:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 18:29:48,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:29:48,387 INFO L175 Difference]: Start difference. First operand has 155 places, 224 transitions, 3516 flow. Second operand 6 states and 117 transitions. [2024-06-21 18:29:48,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 240 transitions, 4117 flow [2024-06-21 18:29:48,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 240 transitions, 3934 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 18:29:48,579 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 3463 flow [2024-06-21 18:29:48,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3463, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-21 18:29:48,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-21 18:29:48,580 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 3463 flow [2024-06-21 18:29:48,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:48,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:48,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:48,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:29:48,581 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:48,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1848750683, now seen corresponding path program 3 times [2024-06-21 18:29:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:48,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290049279] [2024-06-21 18:29:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:48,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:49,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:49,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290049279] [2024-06-21 18:29:49,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290049279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:49,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:49,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:29:49,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576996951] [2024-06-21 18:29:49,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:49,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:29:49,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:29:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:29:49,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:49,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 3463 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:49,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:49,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:49,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:50,636 INFO L124 PetriNetUnfolderBase]: 2580/4092 cut-off events. [2024-06-21 18:29:50,636 INFO L125 PetriNetUnfolderBase]: For 117055/117067 co-relation queries the response was YES. [2024-06-21 18:29:50,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24445 conditions, 4092 events. 2580/4092 cut-off events. For 117055/117067 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23150 event pairs, 662 based on Foata normal form. 16/4073 useless extension candidates. Maximal degree in co-relation 24361. Up to 3414 conditions per place. [2024-06-21 18:29:50,662 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 177 selfloop transitions, 88 changer transitions 0/278 dead transitions. [2024-06-21 18:29:50,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 278 transitions, 4380 flow [2024-06-21 18:29:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 18:29:50,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 18:29:50,664 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 3463 flow. Second operand 8 states and 168 transitions. [2024-06-21 18:29:50,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 278 transitions, 4380 flow [2024-06-21 18:29:50,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 278 transitions, 4333 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 18:29:50,779 INFO L231 Difference]: Finished difference. Result has 164 places, 243 transitions, 3755 flow [2024-06-21 18:29:50,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3755, PETRI_PLACES=164, PETRI_TRANSITIONS=243} [2024-06-21 18:29:50,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 18:29:50,780 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 243 transitions, 3755 flow [2024-06-21 18:29:50,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:50,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:50,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:50,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:29:50,781 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:50,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:50,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1435320793, now seen corresponding path program 4 times [2024-06-21 18:29:50,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:50,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185547251] [2024-06-21 18:29:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:50,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:51,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185547251] [2024-06-21 18:29:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185547251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:51,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:29:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969169444] [2024-06-21 18:29:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:29:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:29:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:29:52,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:29:52,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 243 transitions, 3755 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:52,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:52,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:29:52,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:53,064 INFO L124 PetriNetUnfolderBase]: 2594/4117 cut-off events. [2024-06-21 18:29:53,064 INFO L125 PetriNetUnfolderBase]: For 125808/125820 co-relation queries the response was YES. [2024-06-21 18:29:53,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25381 conditions, 4117 events. 2594/4117 cut-off events. For 125808/125820 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23325 event pairs, 657 based on Foata normal form. 20/4113 useless extension candidates. Maximal degree in co-relation 25294. Up to 3558 conditions per place. [2024-06-21 18:29:53,098 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 177 selfloop transitions, 86 changer transitions 0/276 dead transitions. [2024-06-21 18:29:53,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 276 transitions, 4471 flow [2024-06-21 18:29:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:29:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:29:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 18:29:53,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 18:29:53,100 INFO L175 Difference]: Start difference. First operand has 164 places, 243 transitions, 3755 flow. Second operand 8 states and 165 transitions. [2024-06-21 18:29:53,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 276 transitions, 4471 flow [2024-06-21 18:29:53,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 276 transitions, 4383 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:53,267 INFO L231 Difference]: Finished difference. Result has 169 places, 245 transitions, 3873 flow [2024-06-21 18:29:53,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3667, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3873, PETRI_PLACES=169, PETRI_TRANSITIONS=245} [2024-06-21 18:29:53,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-21 18:29:53,268 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 245 transitions, 3873 flow [2024-06-21 18:29:53,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:53,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:53,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:53,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:29:53,269 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:53,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash -377383607, now seen corresponding path program 5 times [2024-06-21 18:29:53,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:53,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353991172] [2024-06-21 18:29:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:53,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:54,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353991172] [2024-06-21 18:29:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353991172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:54,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:29:54,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486984768] [2024-06-21 18:29:54,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:54,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:29:54,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:29:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:29:54,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 18:29:54,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 245 transitions, 3873 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:54,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:54,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 18:29:54,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:55,095 INFO L124 PetriNetUnfolderBase]: 2207/3774 cut-off events. [2024-06-21 18:29:55,095 INFO L125 PetriNetUnfolderBase]: For 128005/128076 co-relation queries the response was YES. [2024-06-21 18:29:55,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23854 conditions, 3774 events. 2207/3774 cut-off events. For 128005/128076 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23231 event pairs, 434 based on Foata normal form. 59/3779 useless extension candidates. Maximal degree in co-relation 23765. Up to 2542 conditions per place. [2024-06-21 18:29:55,126 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 100 changer transitions 0/284 dead transitions. [2024-06-21 18:29:55,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 284 transitions, 4547 flow [2024-06-21 18:29:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:29:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:29:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 18:29:55,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382059800664452 [2024-06-21 18:29:55,127 INFO L175 Difference]: Start difference. First operand has 169 places, 245 transitions, 3873 flow. Second operand 7 states and 162 transitions. [2024-06-21 18:29:55,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 284 transitions, 4547 flow [2024-06-21 18:29:55,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 284 transitions, 4418 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:29:55,283 INFO L231 Difference]: Finished difference. Result has 173 places, 257 transitions, 4169 flow [2024-06-21 18:29:55,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4169, PETRI_PLACES=173, PETRI_TRANSITIONS=257} [2024-06-21 18:29:55,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-21 18:29:55,284 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 257 transitions, 4169 flow [2024-06-21 18:29:55,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:29:55,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:55,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:55,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:29:55,284 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:55,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:55,285 INFO L85 PathProgramCache]: Analyzing trace with hash 800528759, now seen corresponding path program 7 times [2024-06-21 18:29:55,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:55,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387992580] [2024-06-21 18:29:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387992580] [2024-06-21 18:29:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387992580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:56,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:56,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:56,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567590673] [2024-06-21 18:29:56,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:56,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:56,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:56,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:56,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:56,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:56,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 257 transitions, 4169 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:56,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:56,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:56,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:29:58,021 INFO L124 PetriNetUnfolderBase]: 3091/4837 cut-off events. [2024-06-21 18:29:58,022 INFO L125 PetriNetUnfolderBase]: For 146767/146772 co-relation queries the response was YES. [2024-06-21 18:29:58,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30168 conditions, 4837 events. 3091/4837 cut-off events. For 146767/146772 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27334 event pairs, 690 based on Foata normal form. 6/4839 useless extension candidates. Maximal degree in co-relation 30076. Up to 3709 conditions per place. [2024-06-21 18:29:58,069 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 160 selfloop transitions, 181 changer transitions 0/346 dead transitions. [2024-06-21 18:29:58,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 346 transitions, 6001 flow [2024-06-21 18:29:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:29:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:29:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 18:29:58,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-21 18:29:58,071 INFO L175 Difference]: Start difference. First operand has 173 places, 257 transitions, 4169 flow. Second operand 9 states and 191 transitions. [2024-06-21 18:29:58,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 346 transitions, 6001 flow [2024-06-21 18:29:58,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 346 transitions, 5880 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 18:29:58,315 INFO L231 Difference]: Finished difference. Result has 182 places, 305 transitions, 5433 flow [2024-06-21 18:29:58,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5433, PETRI_PLACES=182, PETRI_TRANSITIONS=305} [2024-06-21 18:29:58,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-21 18:29:58,316 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 305 transitions, 5433 flow [2024-06-21 18:29:58,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:58,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:29:58,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:29:58,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:29:58,317 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:29:58,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:29:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash 765846269, now seen corresponding path program 8 times [2024-06-21 18:29:58,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:29:58,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509801606] [2024-06-21 18:29:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:29:58,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:29:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:29:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:29:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:29:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509801606] [2024-06-21 18:29:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509801606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:29:59,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:29:59,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:29:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079521451] [2024-06-21 18:29:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:29:59,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:29:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:29:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:29:59,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:29:59,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:29:59,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 305 transitions, 5433 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:29:59,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:29:59,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:29:59,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:01,124 INFO L124 PetriNetUnfolderBase]: 3232/5068 cut-off events. [2024-06-21 18:30:01,124 INFO L125 PetriNetUnfolderBase]: For 166275/166278 co-relation queries the response was YES. [2024-06-21 18:30:01,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32750 conditions, 5068 events. 3232/5068 cut-off events. For 166275/166278 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28966 event pairs, 695 based on Foata normal form. 4/5068 useless extension candidates. Maximal degree in co-relation 32654. Up to 3813 conditions per place. [2024-06-21 18:30:01,169 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 172 selfloop transitions, 199 changer transitions 0/376 dead transitions. [2024-06-21 18:30:01,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 376 transitions, 7098 flow [2024-06-21 18:30:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:30:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:30:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 18:30:01,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-21 18:30:01,170 INFO L175 Difference]: Start difference. First operand has 182 places, 305 transitions, 5433 flow. Second operand 9 states and 191 transitions. [2024-06-21 18:30:01,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 376 transitions, 7098 flow [2024-06-21 18:30:01,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 376 transitions, 6791 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:30:01,362 INFO L231 Difference]: Finished difference. Result has 188 places, 337 transitions, 6347 flow [2024-06-21 18:30:01,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6347, PETRI_PLACES=188, PETRI_TRANSITIONS=337} [2024-06-21 18:30:01,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-21 18:30:01,363 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 337 transitions, 6347 flow [2024-06-21 18:30:01,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:30:01,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:01,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:01,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:30:01,363 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:01,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 765852779, now seen corresponding path program 9 times [2024-06-21 18:30:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:01,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267674639] [2024-06-21 18:30:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:02,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:02,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267674639] [2024-06-21 18:30:02,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267674639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:02,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:02,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:30:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40671343] [2024-06-21 18:30:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:02,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:30:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:30:02,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:30:02,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:30:02,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 337 transitions, 6347 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:30:02,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:02,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:30:02,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:04,163 INFO L124 PetriNetUnfolderBase]: 3222/5054 cut-off events. [2024-06-21 18:30:04,164 INFO L125 PetriNetUnfolderBase]: For 162948/162951 co-relation queries the response was YES. [2024-06-21 18:30:04,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32954 conditions, 5054 events. 3222/5054 cut-off events. For 162948/162951 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28850 event pairs, 695 based on Foata normal form. 4/5054 useless extension candidates. Maximal degree in co-relation 32856. Up to 3805 conditions per place. [2024-06-21 18:30:04,212 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 166 selfloop transitions, 202 changer transitions 0/373 dead transitions. [2024-06-21 18:30:04,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 373 transitions, 7253 flow [2024-06-21 18:30:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:30:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:30:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 18:30:04,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-21 18:30:04,215 INFO L175 Difference]: Start difference. First operand has 188 places, 337 transitions, 6347 flow. Second operand 9 states and 187 transitions. [2024-06-21 18:30:04,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 373 transitions, 7253 flow [2024-06-21 18:30:04,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 373 transitions, 6887 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 18:30:04,456 INFO L231 Difference]: Finished difference. Result has 194 places, 340 transitions, 6504 flow [2024-06-21 18:30:04,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5981, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6504, PETRI_PLACES=194, PETRI_TRANSITIONS=340} [2024-06-21 18:30:04,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-21 18:30:04,458 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 340 transitions, 6504 flow [2024-06-21 18:30:04,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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) [2024-06-21 18:30:04,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:04,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:30:04,459 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:04,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:04,459 INFO L85 PathProgramCache]: Analyzing trace with hash 942716592, now seen corresponding path program 3 times [2024-06-21 18:30:04,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:04,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285832073] [2024-06-21 18:30:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:05,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:05,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285832073] [2024-06-21 18:30:05,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285832073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:05,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:05,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:30:05,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948838682] [2024-06-21 18:30:05,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:05,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:30:05,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:30:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:30:05,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:05,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 340 transitions, 6504 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:05,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:05,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:05,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:06,241 INFO L124 PetriNetUnfolderBase]: 2942/4735 cut-off events. [2024-06-21 18:30:06,241 INFO L125 PetriNetUnfolderBase]: For 172295/172322 co-relation queries the response was YES. [2024-06-21 18:30:06,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31903 conditions, 4735 events. 2942/4735 cut-off events. For 172295/172322 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28064 event pairs, 843 based on Foata normal form. 21/4720 useless extension candidates. Maximal degree in co-relation 31802. Up to 4309 conditions per place. [2024-06-21 18:30:06,284 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 24 changer transitions 0/361 dead transitions. [2024-06-21 18:30:06,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 361 transitions, 7285 flow [2024-06-21 18:30:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:30:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:30:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 18:30:06,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 18:30:06,286 INFO L175 Difference]: Start difference. First operand has 194 places, 340 transitions, 6504 flow. Second operand 7 states and 137 transitions. [2024-06-21 18:30:06,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 361 transitions, 7285 flow [2024-06-21 18:30:06,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 361 transitions, 7030 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 18:30:06,524 INFO L231 Difference]: Finished difference. Result has 198 places, 344 transitions, 6362 flow [2024-06-21 18:30:06,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6250, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6362, PETRI_PLACES=198, PETRI_TRANSITIONS=344} [2024-06-21 18:30:06,525 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 18:30:06,525 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 344 transitions, 6362 flow [2024-06-21 18:30:06,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:06,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:06,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:06,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:30:06,526 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:06,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1146094640, now seen corresponding path program 1 times [2024-06-21 18:30:06,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:06,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331361692] [2024-06-21 18:30:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:07,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331361692] [2024-06-21 18:30:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331361692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:07,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:07,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:30:07,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486834374] [2024-06-21 18:30:07,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:07,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:30:07,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:30:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:30:07,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:30:07,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 344 transitions, 6362 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:07,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:07,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:30:07,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:08,350 INFO L124 PetriNetUnfolderBase]: 2723/4487 cut-off events. [2024-06-21 18:30:08,350 INFO L125 PetriNetUnfolderBase]: For 160580/160603 co-relation queries the response was YES. [2024-06-21 18:30:08,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29288 conditions, 4487 events. 2723/4487 cut-off events. For 160580/160603 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27199 event pairs, 817 based on Foata normal form. 18/4460 useless extension candidates. Maximal degree in co-relation 29185. Up to 4001 conditions per place. [2024-06-21 18:30:08,389 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 325 selfloop transitions, 15 changer transitions 0/358 dead transitions. [2024-06-21 18:30:08,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 358 transitions, 7112 flow [2024-06-21 18:30:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:30:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:30:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 18:30:08,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:30:08,390 INFO L175 Difference]: Start difference. First operand has 198 places, 344 transitions, 6362 flow. Second operand 7 states and 133 transitions. [2024-06-21 18:30:08,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 358 transitions, 7112 flow [2024-06-21 18:30:08,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 358 transitions, 7052 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:30:08,598 INFO L231 Difference]: Finished difference. Result has 200 places, 347 transitions, 6379 flow [2024-06-21 18:30:08,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6379, PETRI_PLACES=200, PETRI_TRANSITIONS=347} [2024-06-21 18:30:08,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 18:30:08,599 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 347 transitions, 6379 flow [2024-06-21 18:30:08,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:08,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:08,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:08,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:30:08,600 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:08,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1153713200, now seen corresponding path program 2 times [2024-06-21 18:30:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577922987] [2024-06-21 18:30:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:09,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:09,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577922987] [2024-06-21 18:30:09,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577922987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:09,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:09,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:30:09,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911378222] [2024-06-21 18:30:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:09,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:30:09,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:30:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:30:09,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:30:09,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 347 transitions, 6379 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:09,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:09,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:30:09,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:10,533 INFO L124 PetriNetUnfolderBase]: 2720/4480 cut-off events. [2024-06-21 18:30:10,533 INFO L125 PetriNetUnfolderBase]: For 165453/165476 co-relation queries the response was YES. [2024-06-21 18:30:10,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29644 conditions, 4480 events. 2720/4480 cut-off events. For 165453/165476 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27114 event pairs, 821 based on Foata normal form. 17/4448 useless extension candidates. Maximal degree in co-relation 29540. Up to 3991 conditions per place. [2024-06-21 18:30:10,574 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 320 selfloop transitions, 20 changer transitions 0/358 dead transitions. [2024-06-21 18:30:10,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 358 transitions, 7123 flow [2024-06-21 18:30:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:30:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:30:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 18:30:10,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 18:30:10,575 INFO L175 Difference]: Start difference. First operand has 200 places, 347 transitions, 6379 flow. Second operand 7 states and 132 transitions. [2024-06-21 18:30:10,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 358 transitions, 7123 flow [2024-06-21 18:30:10,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 358 transitions, 7070 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 18:30:10,757 INFO L231 Difference]: Finished difference. Result has 202 places, 350 transitions, 6418 flow [2024-06-21 18:30:10,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6418, PETRI_PLACES=202, PETRI_TRANSITIONS=350} [2024-06-21 18:30:10,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-21 18:30:10,758 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 350 transitions, 6418 flow [2024-06-21 18:30:10,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:10,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:10,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:10,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:30:10,759 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:10,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1308439421, now seen corresponding path program 1 times [2024-06-21 18:30:10,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:10,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515975406] [2024-06-21 18:30:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:10,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:12,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515975406] [2024-06-21 18:30:12,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515975406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:12,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:12,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:30:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462795731] [2024-06-21 18:30:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:12,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:30:12,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:30:12,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:30:12,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:12,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 350 transitions, 6418 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:12,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:12,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:12,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:14,094 INFO L124 PetriNetUnfolderBase]: 2979/4789 cut-off events. [2024-06-21 18:30:14,095 INFO L125 PetriNetUnfolderBase]: For 166980/166980 co-relation queries the response was YES. [2024-06-21 18:30:14,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31349 conditions, 4789 events. 2979/4789 cut-off events. For 166980/166980 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28002 event pairs, 871 based on Foata normal form. 4/4790 useless extension candidates. Maximal degree in co-relation 31244. Up to 4372 conditions per place. [2024-06-21 18:30:14,141 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 355 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2024-06-21 18:30:14,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 382 transitions, 7338 flow [2024-06-21 18:30:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:30:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:30:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 18:30:14,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 18:30:14,143 INFO L175 Difference]: Start difference. First operand has 202 places, 350 transitions, 6418 flow. Second operand 10 states and 185 transitions. [2024-06-21 18:30:14,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 382 transitions, 7338 flow [2024-06-21 18:30:14,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 382 transitions, 7268 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 18:30:14,396 INFO L231 Difference]: Finished difference. Result has 208 places, 355 transitions, 6483 flow [2024-06-21 18:30:14,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6348, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6483, PETRI_PLACES=208, PETRI_TRANSITIONS=355} [2024-06-21 18:30:14,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-21 18:30:14,397 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 355 transitions, 6483 flow [2024-06-21 18:30:14,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:14,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:14,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:30:14,398 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:14,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:14,398 INFO L85 PathProgramCache]: Analyzing trace with hash 991521938, now seen corresponding path program 1 times [2024-06-21 18:30:14,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:14,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802265209] [2024-06-21 18:30:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:14,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:15,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:15,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802265209] [2024-06-21 18:30:15,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802265209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:15,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:15,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565516209] [2024-06-21 18:30:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:15,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:15,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:15,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 355 transitions, 6483 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:15,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:15,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:15,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:16,375 INFO L124 PetriNetUnfolderBase]: 2950/4742 cut-off events. [2024-06-21 18:30:16,375 INFO L125 PetriNetUnfolderBase]: For 198780/198803 co-relation queries the response was YES. [2024-06-21 18:30:16,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32845 conditions, 4742 events. 2950/4742 cut-off events. For 198780/198803 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28019 event pairs, 687 based on Foata normal form. 19/4714 useless extension candidates. Maximal degree in co-relation 32738. Up to 4050 conditions per place. [2024-06-21 18:30:16,423 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 237 selfloop transitions, 121 changer transitions 0/375 dead transitions. [2024-06-21 18:30:16,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 375 transitions, 7321 flow [2024-06-21 18:30:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:30:16,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:30:16,424 INFO L175 Difference]: Start difference. First operand has 208 places, 355 transitions, 6483 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:30:16,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 375 transitions, 7321 flow [2024-06-21 18:30:16,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 375 transitions, 7222 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 18:30:16,719 INFO L231 Difference]: Finished difference. Result has 207 places, 359 transitions, 6708 flow [2024-06-21 18:30:16,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6384, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6708, PETRI_PLACES=207, PETRI_TRANSITIONS=359} [2024-06-21 18:30:16,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 18:30:16,720 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 359 transitions, 6708 flow [2024-06-21 18:30:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:16,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:16,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:16,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:30:16,721 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:16,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash 991880422, now seen corresponding path program 1 times [2024-06-21 18:30:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:16,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928100197] [2024-06-21 18:30:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:18,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928100197] [2024-06-21 18:30:18,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928100197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:18,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:18,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35859592] [2024-06-21 18:30:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:18,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:18,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:18,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 359 transitions, 6708 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:18,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:18,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:18,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:19,121 INFO L124 PetriNetUnfolderBase]: 2951/4756 cut-off events. [2024-06-21 18:30:19,122 INFO L125 PetriNetUnfolderBase]: For 207429/207458 co-relation queries the response was YES. [2024-06-21 18:30:19,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33912 conditions, 4756 events. 2951/4756 cut-off events. For 207429/207458 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28145 event pairs, 749 based on Foata normal form. 21/4746 useless extension candidates. Maximal degree in co-relation 33807. Up to 4312 conditions per place. [2024-06-21 18:30:19,172 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 26 changer transitions 0/374 dead transitions. [2024-06-21 18:30:19,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 374 transitions, 7492 flow [2024-06-21 18:30:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 18:30:19,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 18:30:19,173 INFO L175 Difference]: Start difference. First operand has 207 places, 359 transitions, 6708 flow. Second operand 8 states and 145 transitions. [2024-06-21 18:30:19,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 374 transitions, 7492 flow [2024-06-21 18:30:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 374 transitions, 7265 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 18:30:19,458 INFO L231 Difference]: Finished difference. Result has 210 places, 362 transitions, 6580 flow [2024-06-21 18:30:19,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6481, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6580, PETRI_PLACES=210, PETRI_TRANSITIONS=362} [2024-06-21 18:30:19,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-21 18:30:19,459 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 362 transitions, 6580 flow [2024-06-21 18:30:19,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:19,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:19,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:19,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:30:19,460 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:19,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1391377298, now seen corresponding path program 2 times [2024-06-21 18:30:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:19,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164551483] [2024-06-21 18:30:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:19,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:20,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164551483] [2024-06-21 18:30:20,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164551483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:20,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:20,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025237092] [2024-06-21 18:30:20,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:20,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:20,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:20,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 362 transitions, 6580 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:20,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:20,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:20,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:21,489 INFO L124 PetriNetUnfolderBase]: 2990/4806 cut-off events. [2024-06-21 18:30:21,490 INFO L125 PetriNetUnfolderBase]: For 217037/217060 co-relation queries the response was YES. [2024-06-21 18:30:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34496 conditions, 4806 events. 2990/4806 cut-off events. For 217037/217060 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28429 event pairs, 673 based on Foata normal form. 19/4774 useless extension candidates. Maximal degree in co-relation 34390. Up to 4031 conditions per place. [2024-06-21 18:30:21,537 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 253 selfloop transitions, 113 changer transitions 0/383 dead transitions. [2024-06-21 18:30:21,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 383 transitions, 7542 flow [2024-06-21 18:30:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 18:30:21,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 18:30:21,539 INFO L175 Difference]: Start difference. First operand has 210 places, 362 transitions, 6580 flow. Second operand 8 states and 154 transitions. [2024-06-21 18:30:21,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 383 transitions, 7542 flow [2024-06-21 18:30:21,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 383 transitions, 7479 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 18:30:21,785 INFO L231 Difference]: Finished difference. Result has 215 places, 370 transitions, 6924 flow [2024-06-21 18:30:21,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6517, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6924, PETRI_PLACES=215, PETRI_TRANSITIONS=370} [2024-06-21 18:30:21,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-21 18:30:21,786 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 370 transitions, 6924 flow [2024-06-21 18:30:21,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:21,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:21,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:21,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:30:21,786 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:21,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2035782048, now seen corresponding path program 2 times [2024-06-21 18:30:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:21,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866917044] [2024-06-21 18:30:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:21,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:23,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866917044] [2024-06-21 18:30:23,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866917044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:23,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:23,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:30:23,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212065163] [2024-06-21 18:30:23,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:23,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:30:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:23,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:30:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:30:23,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:23,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 370 transitions, 6924 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:23,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:23,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:23,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:24,450 INFO L124 PetriNetUnfolderBase]: 2998/4838 cut-off events. [2024-06-21 18:30:24,451 INFO L125 PetriNetUnfolderBase]: For 231848/231880 co-relation queries the response was YES. [2024-06-21 18:30:24,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35881 conditions, 4838 events. 2998/4838 cut-off events. For 231848/231880 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28778 event pairs, 755 based on Foata normal form. 23/4828 useless extension candidates. Maximal degree in co-relation 35772. Up to 4360 conditions per place. [2024-06-21 18:30:24,498 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 41 changer transitions 0/388 dead transitions. [2024-06-21 18:30:24,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 388 transitions, 7864 flow [2024-06-21 18:30:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 18:30:24,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 18:30:24,500 INFO L175 Difference]: Start difference. First operand has 215 places, 370 transitions, 6924 flow. Second operand 8 states and 144 transitions. [2024-06-21 18:30:24,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 388 transitions, 7864 flow [2024-06-21 18:30:24,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 388 transitions, 7719 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 18:30:24,769 INFO L231 Difference]: Finished difference. Result has 221 places, 378 transitions, 6986 flow [2024-06-21 18:30:24,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6986, PETRI_PLACES=221, PETRI_TRANSITIONS=378} [2024-06-21 18:30:24,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 18:30:24,770 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 378 transitions, 6986 flow [2024-06-21 18:30:24,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:24,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:24,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:24,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:30:24,771 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:24,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2036257278, now seen corresponding path program 3 times [2024-06-21 18:30:24,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:24,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679540546] [2024-06-21 18:30:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:24,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:26,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:26,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679540546] [2024-06-21 18:30:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679540546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:26,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385737974] [2024-06-21 18:30:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:26,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:26,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:26,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 378 transitions, 6986 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:26,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:26,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:26,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:27,279 INFO L124 PetriNetUnfolderBase]: 3003/4845 cut-off events. [2024-06-21 18:30:27,279 INFO L125 PetriNetUnfolderBase]: For 238220/238252 co-relation queries the response was YES. [2024-06-21 18:30:27,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36442 conditions, 4845 events. 3003/4845 cut-off events. For 238220/238252 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28819 event pairs, 755 based on Foata normal form. 23/4835 useless extension candidates. Maximal degree in co-relation 36330. Up to 4381 conditions per place. [2024-06-21 18:30:27,332 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 34 changer transitions 0/390 dead transitions. [2024-06-21 18:30:27,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 390 transitions, 7811 flow [2024-06-21 18:30:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 18:30:27,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 18:30:27,333 INFO L175 Difference]: Start difference. First operand has 221 places, 378 transitions, 6986 flow. Second operand 8 states and 142 transitions. [2024-06-21 18:30:27,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 390 transitions, 7811 flow [2024-06-21 18:30:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 390 transitions, 7720 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 18:30:27,660 INFO L231 Difference]: Finished difference. Result has 225 places, 381 transitions, 7028 flow [2024-06-21 18:30:27,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6903, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7028, PETRI_PLACES=225, PETRI_TRANSITIONS=381} [2024-06-21 18:30:27,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-21 18:30:27,661 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 381 transitions, 7028 flow [2024-06-21 18:30:27,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:27,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:27,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:30:27,662 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:27,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2036257712, now seen corresponding path program 3 times [2024-06-21 18:30:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:27,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844012533] [2024-06-21 18:30:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:28,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:28,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844012533] [2024-06-21 18:30:28,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844012533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:28,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:28,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:28,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256783239] [2024-06-21 18:30:28,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:28,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:28,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:28,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 381 transitions, 7028 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:28,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:28,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:28,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:29,855 INFO L124 PetriNetUnfolderBase]: 3041/4881 cut-off events. [2024-06-21 18:30:29,855 INFO L125 PetriNetUnfolderBase]: For 253104/253127 co-relation queries the response was YES. [2024-06-21 18:30:29,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37089 conditions, 4881 events. 3041/4881 cut-off events. For 253104/253127 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28951 event pairs, 684 based on Foata normal form. 15/4820 useless extension candidates. Maximal degree in co-relation 36975. Up to 4013 conditions per place. [2024-06-21 18:30:29,912 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 260 selfloop transitions, 128 changer transitions 0/405 dead transitions. [2024-06-21 18:30:29,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 405 transitions, 8222 flow [2024-06-21 18:30:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:30:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:30:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 18:30:29,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 18:30:29,914 INFO L175 Difference]: Start difference. First operand has 225 places, 381 transitions, 7028 flow. Second operand 7 states and 141 transitions. [2024-06-21 18:30:29,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 405 transitions, 8222 flow [2024-06-21 18:30:30,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 405 transitions, 8128 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:30:30,281 INFO L231 Difference]: Finished difference. Result has 227 places, 392 transitions, 7406 flow [2024-06-21 18:30:30,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6934, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7406, PETRI_PLACES=227, PETRI_TRANSITIONS=392} [2024-06-21 18:30:30,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-21 18:30:30,282 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 392 transitions, 7406 flow [2024-06-21 18:30:30,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:30,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:30,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:30,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:30:30,283 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:30,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1421817916, now seen corresponding path program 4 times [2024-06-21 18:30:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:30,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508023578] [2024-06-21 18:30:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:30,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:31,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508023578] [2024-06-21 18:30:31,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508023578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:31,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:31,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:31,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600968704] [2024-06-21 18:30:31,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:31,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:31,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:31,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:31,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 392 transitions, 7406 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:31,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:31,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:31,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:32,236 INFO L124 PetriNetUnfolderBase]: 3100/4971 cut-off events. [2024-06-21 18:30:32,236 INFO L125 PetriNetUnfolderBase]: For 271307/271334 co-relation queries the response was YES. [2024-06-21 18:30:32,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38976 conditions, 4971 events. 3100/4971 cut-off events. For 271307/271334 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29582 event pairs, 655 based on Foata normal form. 23/4953 useless extension candidates. Maximal degree in co-relation 38860. Up to 4254 conditions per place. [2024-06-21 18:30:32,291 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 276 selfloop transitions, 143 changer transitions 0/436 dead transitions. [2024-06-21 18:30:32,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 436 transitions, 8765 flow [2024-06-21 18:30:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 18:30:32,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 18:30:32,293 INFO L175 Difference]: Start difference. First operand has 227 places, 392 transitions, 7406 flow. Second operand 8 states and 164 transitions. [2024-06-21 18:30:32,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 436 transitions, 8765 flow [2024-06-21 18:30:32,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 436 transitions, 8550 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-21 18:30:32,686 INFO L231 Difference]: Finished difference. Result has 234 places, 413 transitions, 8023 flow [2024-06-21 18:30:32,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8023, PETRI_PLACES=234, PETRI_TRANSITIONS=413} [2024-06-21 18:30:32,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 18:30:32,687 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 413 transitions, 8023 flow [2024-06-21 18:30:32,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:32,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:32,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:32,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:30:32,688 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:32,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash -840914222, now seen corresponding path program 5 times [2024-06-21 18:30:32,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43245434] [2024-06-21 18:30:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:32,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:33,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43245434] [2024-06-21 18:30:33,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43245434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:33,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:33,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787878270] [2024-06-21 18:30:33,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:33,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:33,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:33,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:33,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:33,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:33,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 413 transitions, 8023 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:33,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:33,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:34,727 INFO L124 PetriNetUnfolderBase]: 3132/5020 cut-off events. [2024-06-21 18:30:34,727 INFO L125 PetriNetUnfolderBase]: For 279985/280014 co-relation queries the response was YES. [2024-06-21 18:30:34,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39919 conditions, 5020 events. 3132/5020 cut-off events. For 279985/280014 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 29949 event pairs, 650 based on Foata normal form. 21/5001 useless extension candidates. Maximal degree in co-relation 39800. Up to 4285 conditions per place. [2024-06-21 18:30:34,785 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 289 selfloop transitions, 139 changer transitions 0/445 dead transitions. [2024-06-21 18:30:34,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 445 transitions, 9133 flow [2024-06-21 18:30:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 18:30:34,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-21 18:30:34,787 INFO L175 Difference]: Start difference. First operand has 234 places, 413 transitions, 8023 flow. Second operand 8 states and 163 transitions. [2024-06-21 18:30:34,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 445 transitions, 9133 flow [2024-06-21 18:30:35,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 445 transitions, 8779 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 18:30:35,176 INFO L231 Difference]: Finished difference. Result has 236 places, 424 transitions, 8178 flow [2024-06-21 18:30:35,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7706, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8178, PETRI_PLACES=236, PETRI_TRANSITIONS=424} [2024-06-21 18:30:35,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-21 18:30:35,177 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 424 transitions, 8178 flow [2024-06-21 18:30:35,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:35,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:35,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:35,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:30:35,177 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:35,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -840556172, now seen corresponding path program 6 times [2024-06-21 18:30:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:35,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441270522] [2024-06-21 18:30:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:36,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:36,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441270522] [2024-06-21 18:30:36,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441270522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:36,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:36,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074979085] [2024-06-21 18:30:36,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:36,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:36,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:36,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 424 transitions, 8178 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:36,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:36,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:36,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:37,175 INFO L124 PetriNetUnfolderBase]: 3186/5106 cut-off events. [2024-06-21 18:30:37,175 INFO L125 PetriNetUnfolderBase]: For 294107/294134 co-relation queries the response was YES. [2024-06-21 18:30:37,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40879 conditions, 5106 events. 3186/5106 cut-off events. For 294107/294134 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30539 event pairs, 670 based on Foata normal form. 19/5082 useless extension candidates. Maximal degree in co-relation 40760. Up to 4244 conditions per place. [2024-06-21 18:30:37,234 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 294 selfloop transitions, 145 changer transitions 0/456 dead transitions. [2024-06-21 18:30:37,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 456 transitions, 9404 flow [2024-06-21 18:30:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:30:37,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 18:30:37,236 INFO L175 Difference]: Start difference. First operand has 236 places, 424 transitions, 8178 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:30:37,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 456 transitions, 9404 flow [2024-06-21 18:30:37,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 456 transitions, 9108 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 18:30:37,598 INFO L231 Difference]: Finished difference. Result has 239 places, 437 transitions, 8466 flow [2024-06-21 18:30:37,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8466, PETRI_PLACES=239, PETRI_TRANSITIONS=437} [2024-06-21 18:30:37,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-21 18:30:37,599 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 437 transitions, 8466 flow [2024-06-21 18:30:37,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:37,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:37,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:37,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:30:37,599 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:37,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash -799444158, now seen corresponding path program 4 times [2024-06-21 18:30:37,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:37,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204910276] [2024-06-21 18:30:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:38,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204910276] [2024-06-21 18:30:38,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204910276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:38,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:38,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:38,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720857129] [2024-06-21 18:30:38,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:38,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:38,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:38,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:38,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:38,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 437 transitions, 8466 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:38,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:38,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:38,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:40,095 INFO L124 PetriNetUnfolderBase]: 3185/5127 cut-off events. [2024-06-21 18:30:40,096 INFO L125 PetriNetUnfolderBase]: For 304022/304051 co-relation queries the response was YES. [2024-06-21 18:30:40,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41587 conditions, 5127 events. 3185/5127 cut-off events. For 304022/304051 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 30930 event pairs, 811 based on Foata normal form. 19/5113 useless extension candidates. Maximal degree in co-relation 41467. Up to 4637 conditions per place. [2024-06-21 18:30:40,150 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 30 changer transitions 0/459 dead transitions. [2024-06-21 18:30:40,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 459 transitions, 9440 flow [2024-06-21 18:30:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 18:30:40,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:30:40,152 INFO L175 Difference]: Start difference. First operand has 239 places, 437 transitions, 8466 flow. Second operand 8 states and 152 transitions. [2024-06-21 18:30:40,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 459 transitions, 9440 flow [2024-06-21 18:30:40,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 459 transitions, 8958 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 18:30:40,618 INFO L231 Difference]: Finished difference. Result has 240 places, 441 transitions, 8092 flow [2024-06-21 18:30:40,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8092, PETRI_PLACES=240, PETRI_TRANSITIONS=441} [2024-06-21 18:30:40,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-21 18:30:40,620 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 441 transitions, 8092 flow [2024-06-21 18:30:40,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:40,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:40,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:30:40,620 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:40,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196454, now seen corresponding path program 1 times [2024-06-21 18:30:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555887471] [2024-06-21 18:30:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:42,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:42,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555887471] [2024-06-21 18:30:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555887471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:42,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:42,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:30:42,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767372976] [2024-06-21 18:30:42,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:42,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:30:42,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:30:42,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:30:42,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:42,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 441 transitions, 8092 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:42,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:42,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:42,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:43,317 INFO L124 PetriNetUnfolderBase]: 3191/5129 cut-off events. [2024-06-21 18:30:43,318 INFO L125 PetriNetUnfolderBase]: For 306589/306616 co-relation queries the response was YES. [2024-06-21 18:30:43,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41074 conditions, 5129 events. 3191/5129 cut-off events. For 306589/306616 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 30947 event pairs, 885 based on Foata normal form. 18/5108 useless extension candidates. Maximal degree in co-relation 40953. Up to 4659 conditions per place. [2024-06-21 18:30:43,379 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 421 selfloop transitions, 18 changer transitions 0/456 dead transitions. [2024-06-21 18:30:43,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 456 transitions, 9058 flow [2024-06-21 18:30:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 18:30:43,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 18:30:43,381 INFO L175 Difference]: Start difference. First operand has 240 places, 441 transitions, 8092 flow. Second operand 8 states and 142 transitions. [2024-06-21 18:30:43,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 456 transitions, 9058 flow [2024-06-21 18:30:43,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 456 transitions, 9006 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:30:43,843 INFO L231 Difference]: Finished difference. Result has 243 places, 444 transitions, 8134 flow [2024-06-21 18:30:43,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8134, PETRI_PLACES=243, PETRI_TRANSITIONS=444} [2024-06-21 18:30:43,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-21 18:30:43,844 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 444 transitions, 8134 flow [2024-06-21 18:30:43,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:43,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:43,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:30:43,845 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:43,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1698851902, now seen corresponding path program 2 times [2024-06-21 18:30:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822769415] [2024-06-21 18:30:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:46,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:46,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822769415] [2024-06-21 18:30:46,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822769415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:46,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:46,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:30:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937782237] [2024-06-21 18:30:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:30:46,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:30:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:30:46,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:30:46,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 444 transitions, 8134 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:46,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:46,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:30:46,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:47,234 INFO L124 PetriNetUnfolderBase]: 3093/5034 cut-off events. [2024-06-21 18:30:47,234 INFO L125 PetriNetUnfolderBase]: For 318753/318780 co-relation queries the response was YES. [2024-06-21 18:30:47,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41233 conditions, 5034 events. 3093/5034 cut-off events. For 318753/318780 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30825 event pairs, 841 based on Foata normal form. 18/5009 useless extension candidates. Maximal degree in co-relation 41111. Up to 4448 conditions per place. [2024-06-21 18:30:47,295 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 408 selfloop transitions, 23 changer transitions 0/456 dead transitions. [2024-06-21 18:30:47,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 456 transitions, 9070 flow [2024-06-21 18:30:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:30:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:30:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 18:30:47,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 18:30:47,297 INFO L175 Difference]: Start difference. First operand has 243 places, 444 transitions, 8134 flow. Second operand 8 states and 148 transitions. [2024-06-21 18:30:47,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 456 transitions, 9070 flow [2024-06-21 18:30:47,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 456 transitions, 8998 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 18:30:47,806 INFO L231 Difference]: Finished difference. Result has 245 places, 447 transitions, 8166 flow [2024-06-21 18:30:47,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8062, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8166, PETRI_PLACES=245, PETRI_TRANSITIONS=447} [2024-06-21 18:30:47,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-21 18:30:47,807 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 447 transitions, 8166 flow [2024-06-21 18:30:47,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:47,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:47,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:30:47,807 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:47,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1405668484, now seen corresponding path program 3 times [2024-06-21 18:30:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911759417] [2024-06-21 18:30:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:49,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:49,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911759417] [2024-06-21 18:30:49,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911759417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:49,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:49,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:30:49,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58025808] [2024-06-21 18:30:49,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:49,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:30:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:49,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:30:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:30:49,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:30:49,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 447 transitions, 8166 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:49,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:49,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:30:49,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:50,612 INFO L124 PetriNetUnfolderBase]: 3198/5138 cut-off events. [2024-06-21 18:30:50,613 INFO L125 PetriNetUnfolderBase]: For 324240/324267 co-relation queries the response was YES. [2024-06-21 18:30:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42059 conditions, 5138 events. 3198/5138 cut-off events. For 324240/324267 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 31062 event pairs, 889 based on Foata normal form. 17/5112 useless extension candidates. Maximal degree in co-relation 41936. Up to 4654 conditions per place. [2024-06-21 18:30:50,670 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 414 selfloop transitions, 31 changer transitions 0/462 dead transitions. [2024-06-21 18:30:50,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 462 transitions, 9198 flow [2024-06-21 18:30:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:30:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:30:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 18:30:50,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 18:30:50,672 INFO L175 Difference]: Start difference. First operand has 245 places, 447 transitions, 8166 flow. Second operand 7 states and 131 transitions. [2024-06-21 18:30:50,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 462 transitions, 9198 flow [2024-06-21 18:30:51,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 462 transitions, 9082 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 18:30:51,321 INFO L231 Difference]: Finished difference. Result has 247 places, 453 transitions, 8254 flow [2024-06-21 18:30:51,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8088, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8254, PETRI_PLACES=247, PETRI_TRANSITIONS=453} [2024-06-21 18:30:51,321 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-21 18:30:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 453 transitions, 8254 flow [2024-06-21 18:30:51,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:51,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:51,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:51,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:30:51,322 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:51,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2063236778, now seen corresponding path program 1 times [2024-06-21 18:30:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:51,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891669856] [2024-06-21 18:30:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:53,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:53,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891669856] [2024-06-21 18:30:53,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891669856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:53,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:53,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:30:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924287926] [2024-06-21 18:30:53,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:53,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:30:53,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:30:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:30:53,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:30:53,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 453 transitions, 8254 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:53,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:53,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:30:53,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:54,962 INFO L124 PetriNetUnfolderBase]: 3625/5681 cut-off events. [2024-06-21 18:30:54,963 INFO L125 PetriNetUnfolderBase]: For 353844/353847 co-relation queries the response was YES. [2024-06-21 18:30:55,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45220 conditions, 5681 events. 3625/5681 cut-off events. For 353844/353847 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33208 event pairs, 721 based on Foata normal form. 24/5691 useless extension candidates. Maximal degree in co-relation 45095. Up to 4199 conditions per place. [2024-06-21 18:30:55,029 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 271 selfloop transitions, 213 changer transitions 0/489 dead transitions. [2024-06-21 18:30:55,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 489 transitions, 9438 flow [2024-06-21 18:30:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:30:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:30:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 18:30:55,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 18:30:55,031 INFO L175 Difference]: Start difference. First operand has 247 places, 453 transitions, 8254 flow. Second operand 10 states and 198 transitions. [2024-06-21 18:30:55,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 489 transitions, 9438 flow [2024-06-21 18:30:55,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 489 transitions, 9356 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 18:30:55,569 INFO L231 Difference]: Finished difference. Result has 254 places, 455 transitions, 8662 flow [2024-06-21 18:30:55,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8662, PETRI_PLACES=254, PETRI_TRANSITIONS=455} [2024-06-21 18:30:55,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-21 18:30:55,570 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 455 transitions, 8662 flow [2024-06-21 18:30:55,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:55,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:55,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:30:55,570 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:55,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2063059148, now seen corresponding path program 2 times [2024-06-21 18:30:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:55,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41978387] [2024-06-21 18:30:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:30:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:30:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:30:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41978387] [2024-06-21 18:30:57,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41978387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:30:57,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:30:57,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:30:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436610672] [2024-06-21 18:30:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:30:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:30:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:30:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:30:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:30:57,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:30:57,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 455 transitions, 8662 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:57,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:30:57,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:30:57,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:30:59,083 INFO L124 PetriNetUnfolderBase]: 3733/5872 cut-off events. [2024-06-21 18:30:59,083 INFO L125 PetriNetUnfolderBase]: For 371266/371269 co-relation queries the response was YES. [2024-06-21 18:30:59,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47392 conditions, 5872 events. 3733/5872 cut-off events. For 371266/371269 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34755 event pairs, 753 based on Foata normal form. 16/5874 useless extension candidates. Maximal degree in co-relation 47265. Up to 4217 conditions per place. [2024-06-21 18:30:59,156 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 281 selfloop transitions, 218 changer transitions 0/504 dead transitions. [2024-06-21 18:30:59,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 504 transitions, 9972 flow [2024-06-21 18:30:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:30:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:30:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 18:30:59,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-21 18:30:59,158 INFO L175 Difference]: Start difference. First operand has 254 places, 455 transitions, 8662 flow. Second operand 10 states and 201 transitions. [2024-06-21 18:30:59,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 504 transitions, 9972 flow [2024-06-21 18:30:59,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 504 transitions, 9623 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 18:30:59,796 INFO L231 Difference]: Finished difference. Result has 259 places, 464 transitions, 8910 flow [2024-06-21 18:30:59,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8313, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8910, PETRI_PLACES=259, PETRI_TRANSITIONS=464} [2024-06-21 18:30:59,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-21 18:30:59,797 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 464 transitions, 8910 flow [2024-06-21 18:30:59,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:30:59,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:30:59,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:30:59,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:30:59,798 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:30:59,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:30:59,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1884417494, now seen corresponding path program 3 times [2024-06-21 18:30:59,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:30:59,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204542568] [2024-06-21 18:30:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:30:59,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:30:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:01,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204542568] [2024-06-21 18:31:01,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204542568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:01,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:01,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:01,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026763928] [2024-06-21 18:31:01,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:01,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:01,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:01,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:01,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 464 transitions, 8910 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:01,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:01,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:01,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:03,557 INFO L124 PetriNetUnfolderBase]: 3791/5977 cut-off events. [2024-06-21 18:31:03,558 INFO L125 PetriNetUnfolderBase]: For 388805/388808 co-relation queries the response was YES. [2024-06-21 18:31:03,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48173 conditions, 5977 events. 3791/5977 cut-off events. For 388805/388808 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35583 event pairs, 746 based on Foata normal form. 16/5979 useless extension candidates. Maximal degree in co-relation 48045. Up to 4098 conditions per place. [2024-06-21 18:31:03,618 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 281 selfloop transitions, 225 changer transitions 0/511 dead transitions. [2024-06-21 18:31:03,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 511 transitions, 10193 flow [2024-06-21 18:31:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 18:31:03,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 18:31:03,620 INFO L175 Difference]: Start difference. First operand has 259 places, 464 transitions, 8910 flow. Second operand 10 states and 202 transitions. [2024-06-21 18:31:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 511 transitions, 10193 flow [2024-06-21 18:31:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 511 transitions, 9629 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:31:04,236 INFO L231 Difference]: Finished difference. Result has 262 places, 470 transitions, 8921 flow [2024-06-21 18:31:04,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8346, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8921, PETRI_PLACES=262, PETRI_TRANSITIONS=470} [2024-06-21 18:31:04,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-21 18:31:04,237 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 470 transitions, 8921 flow [2024-06-21 18:31:04,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:04,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:04,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:04,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:31:04,238 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:04,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash -334988758, now seen corresponding path program 4 times [2024-06-21 18:31:04,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:04,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963559776] [2024-06-21 18:31:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:04,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:05,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:05,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963559776] [2024-06-21 18:31:05,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963559776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:05,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:05,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:05,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580422648] [2024-06-21 18:31:05,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:05,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:05,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:05,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:05,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:06,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:06,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 470 transitions, 8921 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:06,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:06,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:06,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:07,763 INFO L124 PetriNetUnfolderBase]: 3985/6337 cut-off events. [2024-06-21 18:31:07,763 INFO L125 PetriNetUnfolderBase]: For 419683/419686 co-relation queries the response was YES. [2024-06-21 18:31:07,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51459 conditions, 6337 events. 3985/6337 cut-off events. For 419683/419686 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 38623 event pairs, 856 based on Foata normal form. 16/6339 useless extension candidates. Maximal degree in co-relation 51329. Up to 3552 conditions per place. [2024-06-21 18:31:07,841 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 292 selfloop transitions, 224 changer transitions 0/521 dead transitions. [2024-06-21 18:31:07,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 521 transitions, 10398 flow [2024-06-21 18:31:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 18:31:07,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 18:31:07,843 INFO L175 Difference]: Start difference. First operand has 262 places, 470 transitions, 8921 flow. Second operand 10 states and 202 transitions. [2024-06-21 18:31:07,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 521 transitions, 10398 flow [2024-06-21 18:31:08,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 521 transitions, 9947 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 18:31:08,697 INFO L231 Difference]: Finished difference. Result has 267 places, 477 transitions, 9036 flow [2024-06-21 18:31:08,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8470, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9036, PETRI_PLACES=267, PETRI_TRANSITIONS=477} [2024-06-21 18:31:08,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-21 18:31:08,698 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 477 transitions, 9036 flow [2024-06-21 18:31:08,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:08,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:08,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:08,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:31:08,698 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:08,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1536214476, now seen corresponding path program 5 times [2024-06-21 18:31:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362987931] [2024-06-21 18:31:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:08,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:10,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:10,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362987931] [2024-06-21 18:31:10,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362987931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:10,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:10,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:10,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83412235] [2024-06-21 18:31:10,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:10,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:10,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 477 transitions, 9036 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:10,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:10,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:12,544 INFO L124 PetriNetUnfolderBase]: 4143/6617 cut-off events. [2024-06-21 18:31:12,544 INFO L125 PetriNetUnfolderBase]: For 446489/446492 co-relation queries the response was YES. [2024-06-21 18:31:12,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53811 conditions, 6617 events. 4143/6617 cut-off events. For 446489/446492 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 40960 event pairs, 881 based on Foata normal form. 16/6619 useless extension candidates. Maximal degree in co-relation 53679. Up to 4530 conditions per place. [2024-06-21 18:31:12,627 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 292 selfloop transitions, 233 changer transitions 0/530 dead transitions. [2024-06-21 18:31:12,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 530 transitions, 10566 flow [2024-06-21 18:31:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 18:31:12,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-21 18:31:12,629 INFO L175 Difference]: Start difference. First operand has 267 places, 477 transitions, 9036 flow. Second operand 10 states and 206 transitions. [2024-06-21 18:31:12,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 530 transitions, 10566 flow [2024-06-21 18:31:13,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 530 transitions, 10324 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 18:31:13,455 INFO L231 Difference]: Finished difference. Result has 274 places, 486 transitions, 9491 flow [2024-06-21 18:31:13,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8794, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9491, PETRI_PLACES=274, PETRI_TRANSITIONS=486} [2024-06-21 18:31:13,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 18:31:13,456 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 486 transitions, 9491 flow [2024-06-21 18:31:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:13,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:13,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:13,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:31:13,457 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:13,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1540976076, now seen corresponding path program 6 times [2024-06-21 18:31:13,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:13,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691550929] [2024-06-21 18:31:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:13,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:15,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691550929] [2024-06-21 18:31:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691550929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:15,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:15,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873022513] [2024-06-21 18:31:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:15,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:15,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:15,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:15,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 486 transitions, 9491 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:15,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:15,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:17,387 INFO L124 PetriNetUnfolderBase]: 4218/6747 cut-off events. [2024-06-21 18:31:17,387 INFO L125 PetriNetUnfolderBase]: For 470577/470580 co-relation queries the response was YES. [2024-06-21 18:31:17,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55997 conditions, 6747 events. 4218/6747 cut-off events. For 470577/470580 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 42008 event pairs, 959 based on Foata normal form. 20/6753 useless extension candidates. Maximal degree in co-relation 55861. Up to 5205 conditions per place. [2024-06-21 18:31:17,460 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 292 selfloop transitions, 226 changer transitions 0/523 dead transitions. [2024-06-21 18:31:17,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 523 transitions, 10727 flow [2024-06-21 18:31:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:31:17,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 18:31:17,462 INFO L175 Difference]: Start difference. First operand has 274 places, 486 transitions, 9491 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:31:17,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 523 transitions, 10727 flow [2024-06-21 18:31:18,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 523 transitions, 10400 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 18:31:18,385 INFO L231 Difference]: Finished difference. Result has 279 places, 487 transitions, 9666 flow [2024-06-21 18:31:18,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9164, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9666, PETRI_PLACES=279, PETRI_TRANSITIONS=487} [2024-06-21 18:31:18,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-21 18:31:18,386 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 487 transitions, 9666 flow [2024-06-21 18:31:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:18,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:18,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:18,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:31:18,387 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:18,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1540798446, now seen corresponding path program 7 times [2024-06-21 18:31:18,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:18,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382446429] [2024-06-21 18:31:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:20,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:20,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382446429] [2024-06-21 18:31:20,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382446429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:20,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:20,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701349516] [2024-06-21 18:31:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:20,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:20,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 487 transitions, 9666 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:20,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:20,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:20,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:22,282 INFO L124 PetriNetUnfolderBase]: 4315/6908 cut-off events. [2024-06-21 18:31:22,283 INFO L125 PetriNetUnfolderBase]: For 481008/481011 co-relation queries the response was YES. [2024-06-21 18:31:22,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57769 conditions, 6908 events. 4315/6908 cut-off events. For 481008/481011 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43236 event pairs, 948 based on Foata normal form. 16/6910 useless extension candidates. Maximal degree in co-relation 57631. Up to 5219 conditions per place. [2024-06-21 18:31:22,371 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 302 selfloop transitions, 229 changer transitions 0/536 dead transitions. [2024-06-21 18:31:22,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 536 transitions, 11043 flow [2024-06-21 18:31:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 18:31:22,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-21 18:31:22,373 INFO L175 Difference]: Start difference. First operand has 279 places, 487 transitions, 9666 flow. Second operand 10 states and 203 transitions. [2024-06-21 18:31:22,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 536 transitions, 11043 flow [2024-06-21 18:31:23,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 536 transitions, 10455 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:31:23,277 INFO L231 Difference]: Finished difference. Result has 281 places, 494 transitions, 9697 flow [2024-06-21 18:31:23,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9078, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9697, PETRI_PLACES=281, PETRI_TRANSITIONS=494} [2024-06-21 18:31:23,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-21 18:31:23,278 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 494 transitions, 9697 flow [2024-06-21 18:31:23,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:23,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:23,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:23,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:31:23,279 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:23,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1361391342, now seen corresponding path program 8 times [2024-06-21 18:31:23,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:23,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009776198] [2024-06-21 18:31:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:24,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009776198] [2024-06-21 18:31:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009776198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:24,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:24,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979220440] [2024-06-21 18:31:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:24,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:24,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:25,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:25,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 494 transitions, 9697 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:25,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:25,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:25,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:27,018 INFO L124 PetriNetUnfolderBase]: 4390/7026 cut-off events. [2024-06-21 18:31:27,019 INFO L125 PetriNetUnfolderBase]: For 498844/498847 co-relation queries the response was YES. [2024-06-21 18:31:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58657 conditions, 7026 events. 4390/7026 cut-off events. For 498844/498847 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44169 event pairs, 979 based on Foata normal form. 20/7032 useless extension candidates. Maximal degree in co-relation 58518. Up to 5489 conditions per place. [2024-06-21 18:31:27,121 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 307 selfloop transitions, 219 changer transitions 0/531 dead transitions. [2024-06-21 18:31:27,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 531 transitions, 10973 flow [2024-06-21 18:31:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:31:27,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:31:27,123 INFO L175 Difference]: Start difference. First operand has 281 places, 494 transitions, 9697 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:31:27,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 531 transitions, 10973 flow [2024-06-21 18:31:28,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 531 transitions, 10506 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:31:28,068 INFO L231 Difference]: Finished difference. Result has 284 places, 495 transitions, 9722 flow [2024-06-21 18:31:28,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9230, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9722, PETRI_PLACES=284, PETRI_TRANSITIONS=495} [2024-06-21 18:31:28,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-21 18:31:28,069 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 495 transitions, 9722 flow [2024-06-21 18:31:28,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:28,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:28,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:28,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:31:28,070 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:28,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1707209856, now seen corresponding path program 9 times [2024-06-21 18:31:28,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:28,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063534993] [2024-06-21 18:31:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:28,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063534993] [2024-06-21 18:31:29,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063534993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:29,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:29,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:29,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89673811] [2024-06-21 18:31:29,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:29,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:29,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:29,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:29,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 495 transitions, 9722 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:29,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:29,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:29,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:32,004 INFO L124 PetriNetUnfolderBase]: 4465/7162 cut-off events. [2024-06-21 18:31:32,005 INFO L125 PetriNetUnfolderBase]: For 514458/514461 co-relation queries the response was YES. [2024-06-21 18:31:32,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59551 conditions, 7162 events. 4465/7162 cut-off events. For 514458/514461 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 45399 event pairs, 1001 based on Foata normal form. 20/7168 useless extension candidates. Maximal degree in co-relation 59411. Up to 5614 conditions per place. [2024-06-21 18:31:32,085 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 315 selfloop transitions, 215 changer transitions 0/535 dead transitions. [2024-06-21 18:31:32,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 535 transitions, 11047 flow [2024-06-21 18:31:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:31:32,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 18:31:32,087 INFO L175 Difference]: Start difference. First operand has 284 places, 495 transitions, 9722 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:31:32,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 535 transitions, 11047 flow [2024-06-21 18:31:32,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 535 transitions, 10590 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:31:32,905 INFO L231 Difference]: Finished difference. Result has 286 places, 496 transitions, 9751 flow [2024-06-21 18:31:32,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9265, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9751, PETRI_PLACES=286, PETRI_TRANSITIONS=496} [2024-06-21 18:31:32,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-21 18:31:32,906 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 496 transitions, 9751 flow [2024-06-21 18:31:32,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:32,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:32,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:32,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:31:32,907 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:32,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1707032226, now seen corresponding path program 10 times [2024-06-21 18:31:32,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:32,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815404099] [2024-06-21 18:31:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:32,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:34,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815404099] [2024-06-21 18:31:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815404099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:34,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547843010] [2024-06-21 18:31:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:34,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:34,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:34,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:31:34,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 496 transitions, 9751 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:34,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:34,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:31:34,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:36,954 INFO L124 PetriNetUnfolderBase]: 4562/7323 cut-off events. [2024-06-21 18:31:36,954 INFO L125 PetriNetUnfolderBase]: For 527838/527841 co-relation queries the response was YES. [2024-06-21 18:31:37,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60608 conditions, 7323 events. 4562/7323 cut-off events. For 527838/527841 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 46634 event pairs, 990 based on Foata normal form. 16/7325 useless extension candidates. Maximal degree in co-relation 60468. Up to 5481 conditions per place. [2024-06-21 18:31:37,090 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 322 selfloop transitions, 219 changer transitions 0/546 dead transitions. [2024-06-21 18:31:37,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 546 transitions, 11209 flow [2024-06-21 18:31:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:31:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:31:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 18:31:37,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-21 18:31:37,092 INFO L175 Difference]: Start difference. First operand has 286 places, 496 transitions, 9751 flow. Second operand 10 states and 201 transitions. [2024-06-21 18:31:37,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 546 transitions, 11209 flow [2024-06-21 18:31:38,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 546 transitions, 10796 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:31:38,062 INFO L231 Difference]: Finished difference. Result has 290 places, 503 transitions, 9964 flow [2024-06-21 18:31:38,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9338, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9964, PETRI_PLACES=290, PETRI_TRANSITIONS=503} [2024-06-21 18:31:38,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-21 18:31:38,063 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 503 transitions, 9964 flow [2024-06-21 18:31:38,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:38,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:38,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:38,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:31:38,063 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:38,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:38,064 INFO L85 PathProgramCache]: Analyzing trace with hash 675894543, now seen corresponding path program 1 times [2024-06-21 18:31:38,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:38,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372595086] [2024-06-21 18:31:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:38,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:38,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372595086] [2024-06-21 18:31:38,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372595086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:38,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:38,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:31:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371546324] [2024-06-21 18:31:38,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:38,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:31:38,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:38,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:31:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:31:39,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:31:39,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 503 transitions, 9964 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:39,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:39,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:31:39,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:40,726 INFO L124 PetriNetUnfolderBase]: 4252/6949 cut-off events. [2024-06-21 18:31:40,727 INFO L125 PetriNetUnfolderBase]: For 533466/533501 co-relation queries the response was YES. [2024-06-21 18:31:40,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58741 conditions, 6949 events. 4252/6949 cut-off events. For 533466/533501 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 45521 event pairs, 964 based on Foata normal form. 29/6907 useless extension candidates. Maximal degree in co-relation 58600. Up to 6083 conditions per place. [2024-06-21 18:31:40,823 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 378 selfloop transitions, 128 changer transitions 0/526 dead transitions. [2024-06-21 18:31:40,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 526 transitions, 11186 flow [2024-06-21 18:31:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:31:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:31:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:31:40,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:31:40,825 INFO L175 Difference]: Start difference. First operand has 290 places, 503 transitions, 9964 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:31:40,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 526 transitions, 11186 flow [2024-06-21 18:31:41,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 526 transitions, 10692 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 18:31:41,787 INFO L231 Difference]: Finished difference. Result has 290 places, 511 transitions, 9901 flow [2024-06-21 18:31:41,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9470, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9901, PETRI_PLACES=290, PETRI_TRANSITIONS=511} [2024-06-21 18:31:41,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-21 18:31:41,788 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 511 transitions, 9901 flow [2024-06-21 18:31:41,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:41,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:41,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:41,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:31:41,788 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:41,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash 683513103, now seen corresponding path program 2 times [2024-06-21 18:31:41,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:41,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925755814] [2024-06-21 18:31:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:42,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925755814] [2024-06-21 18:31:42,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925755814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:42,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:42,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:31:42,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829627405] [2024-06-21 18:31:42,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:42,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:31:42,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:31:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:31:42,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:31:42,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 511 transitions, 9901 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:42,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:42,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:31:42,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:44,601 INFO L124 PetriNetUnfolderBase]: 4272/6986 cut-off events. [2024-06-21 18:31:44,601 INFO L125 PetriNetUnfolderBase]: For 531742/531777 co-relation queries the response was YES. [2024-06-21 18:31:44,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58524 conditions, 6986 events. 4272/6986 cut-off events. For 531742/531777 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 45786 event pairs, 964 based on Foata normal form. 25/6936 useless extension candidates. Maximal degree in co-relation 58382. Up to 5986 conditions per place. [2024-06-21 18:31:44,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 360 selfloop transitions, 150 changer transitions 0/530 dead transitions. [2024-06-21 18:31:44,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 530 transitions, 11211 flow [2024-06-21 18:31:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:31:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:31:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 18:31:44,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 18:31:44,704 INFO L175 Difference]: Start difference. First operand has 290 places, 511 transitions, 9901 flow. Second operand 8 states and 154 transitions. [2024-06-21 18:31:44,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 530 transitions, 11211 flow [2024-06-21 18:31:45,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 530 transitions, 10894 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 18:31:45,855 INFO L231 Difference]: Finished difference. Result has 292 places, 517 transitions, 10039 flow [2024-06-21 18:31:45,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10039, PETRI_PLACES=292, PETRI_TRANSITIONS=517} [2024-06-21 18:31:45,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-21 18:31:45,855 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 517 transitions, 10039 flow [2024-06-21 18:31:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:45,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:45,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:31:45,856 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:45,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1517809156, now seen corresponding path program 1 times [2024-06-21 18:31:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:45,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902280957] [2024-06-21 18:31:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:45,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902280957] [2024-06-21 18:31:47,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902280957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:47,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:47,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:31:47,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141350992] [2024-06-21 18:31:47,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:47,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:31:47,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:31:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:31:47,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:31:47,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 517 transitions, 10039 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:47,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:47,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:31:47,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:49,087 INFO L124 PetriNetUnfolderBase]: 4285/7007 cut-off events. [2024-06-21 18:31:49,087 INFO L125 PetriNetUnfolderBase]: For 545584/545620 co-relation queries the response was YES. [2024-06-21 18:31:49,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58837 conditions, 7007 events. 4285/7007 cut-off events. For 545584/545620 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 45994 event pairs, 962 based on Foata normal form. 25/6957 useless extension candidates. Maximal degree in co-relation 58694. Up to 6100 conditions per place. [2024-06-21 18:31:49,176 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 374 selfloop transitions, 143 changer transitions 0/537 dead transitions. [2024-06-21 18:31:49,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 537 transitions, 11205 flow [2024-06-21 18:31:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:31:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:31:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:31:49,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 18:31:49,177 INFO L175 Difference]: Start difference. First operand has 292 places, 517 transitions, 10039 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:31:49,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 537 transitions, 11205 flow [2024-06-21 18:31:50,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 537 transitions, 10894 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 18:31:50,276 INFO L231 Difference]: Finished difference. Result has 295 places, 521 transitions, 10113 flow [2024-06-21 18:31:50,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9728, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10113, PETRI_PLACES=295, PETRI_TRANSITIONS=521} [2024-06-21 18:31:50,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-21 18:31:50,277 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 521 transitions, 10113 flow [2024-06-21 18:31:50,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:50,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:50,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:50,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:31:50,278 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:50,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:50,278 INFO L85 PathProgramCache]: Analyzing trace with hash 683522558, now seen corresponding path program 2 times [2024-06-21 18:31:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:50,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972847059] [2024-06-21 18:31:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:50,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972847059] [2024-06-21 18:31:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972847059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:52,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:52,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:31:52,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828487333] [2024-06-21 18:31:52,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:52,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:31:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:31:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:31:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:31:52,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 521 transitions, 10113 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:52,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:52,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:31:52,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:53,927 INFO L124 PetriNetUnfolderBase]: 4335/7088 cut-off events. [2024-06-21 18:31:53,928 INFO L125 PetriNetUnfolderBase]: For 568578/568613 co-relation queries the response was YES. [2024-06-21 18:31:53,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60392 conditions, 7088 events. 4335/7088 cut-off events. For 568578/568613 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 46573 event pairs, 963 based on Foata normal form. 24/7037 useless extension candidates. Maximal degree in co-relation 60248. Up to 5965 conditions per place. [2024-06-21 18:31:54,029 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 369 selfloop transitions, 156 changer transitions 0/545 dead transitions. [2024-06-21 18:31:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 545 transitions, 11651 flow [2024-06-21 18:31:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:31:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:31:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:31:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:31:54,030 INFO L175 Difference]: Start difference. First operand has 295 places, 521 transitions, 10113 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:31:54,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 545 transitions, 11651 flow [2024-06-21 18:31:55,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 545 transitions, 11352 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 18:31:55,204 INFO L231 Difference]: Finished difference. Result has 300 places, 529 transitions, 10338 flow [2024-06-21 18:31:55,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9814, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10338, PETRI_PLACES=300, PETRI_TRANSITIONS=529} [2024-06-21 18:31:55,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-21 18:31:55,204 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 529 transitions, 10338 flow [2024-06-21 18:31:55,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:55,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:31:55,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:31:55,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:31:55,205 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:31:55,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:31:55,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1528922191, now seen corresponding path program 1 times [2024-06-21 18:31:55,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:31:55,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6692045] [2024-06-21 18:31:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:31:55,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:31:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:31:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:31:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:31:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6692045] [2024-06-21 18:31:57,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6692045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:31:57,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:31:57,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:31:57,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314657368] [2024-06-21 18:31:57,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:31:57,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:31:57,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:31:57,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:31:57,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:31:57,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:31:57,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 529 transitions, 10338 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:31:57,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:31:57,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:31:57,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:31:59,472 INFO L124 PetriNetUnfolderBase]: 4338/7111 cut-off events. [2024-06-21 18:31:59,472 INFO L125 PetriNetUnfolderBase]: For 590209/590247 co-relation queries the response was YES. [2024-06-21 18:31:59,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61523 conditions, 7111 events. 4338/7111 cut-off events. For 590209/590247 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46998 event pairs, 1138 based on Foata normal form. 26/7083 useless extension candidates. Maximal degree in co-relation 61377. Up to 6467 conditions per place. [2024-06-21 18:31:59,575 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 491 selfloop transitions, 37 changer transitions 0/548 dead transitions. [2024-06-21 18:31:59,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 548 transitions, 11516 flow [2024-06-21 18:31:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:31:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:31:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 18:31:59,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 18:31:59,576 INFO L175 Difference]: Start difference. First operand has 300 places, 529 transitions, 10338 flow. Second operand 8 states and 157 transitions. [2024-06-21 18:31:59,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 548 transitions, 11516 flow [2024-06-21 18:32:00,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 548 transitions, 11215 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 18:32:00,756 INFO L231 Difference]: Finished difference. Result has 302 places, 532 transitions, 10193 flow [2024-06-21 18:32:00,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10037, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10193, PETRI_PLACES=302, PETRI_TRANSITIONS=532} [2024-06-21 18:32:00,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-21 18:32:00,758 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 532 transitions, 10193 flow [2024-06-21 18:32:00,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:00,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:00,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:32:00,759 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:00,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 183024260, now seen corresponding path program 3 times [2024-06-21 18:32:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:00,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235448826] [2024-06-21 18:32:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235448826] [2024-06-21 18:32:02,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235448826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:02,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:02,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:32:02,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478409872] [2024-06-21 18:32:02,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:02,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:32:02,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:02,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:32:02,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:32:02,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:32:02,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 532 transitions, 10193 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:02,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:02,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:32:02,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:04,415 INFO L124 PetriNetUnfolderBase]: 4353/7115 cut-off events. [2024-06-21 18:32:04,416 INFO L125 PetriNetUnfolderBase]: For 596572/596607 co-relation queries the response was YES. [2024-06-21 18:32:04,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61831 conditions, 7115 events. 4353/7115 cut-off events. For 596572/596607 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 46722 event pairs, 968 based on Foata normal form. 24/7064 useless extension candidates. Maximal degree in co-relation 61683. Up to 6086 conditions per place. [2024-06-21 18:32:04,502 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 375 selfloop transitions, 155 changer transitions 0/550 dead transitions. [2024-06-21 18:32:04,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 550 transitions, 11508 flow [2024-06-21 18:32:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:32:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:32:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 18:32:04,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 18:32:04,504 INFO L175 Difference]: Start difference. First operand has 302 places, 532 transitions, 10193 flow. Second operand 9 states and 170 transitions. [2024-06-21 18:32:04,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 550 transitions, 11508 flow [2024-06-21 18:32:05,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 11378 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 18:32:05,750 INFO L231 Difference]: Finished difference. Result has 305 places, 536 transitions, 10478 flow [2024-06-21 18:32:05,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10063, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10478, PETRI_PLACES=305, PETRI_TRANSITIONS=536} [2024-06-21 18:32:05,750 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-21 18:32:05,750 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 536 transitions, 10478 flow [2024-06-21 18:32:05,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:05,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:05,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:05,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:32:05,751 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:05,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash -128794042, now seen corresponding path program 11 times [2024-06-21 18:32:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667988318] [2024-06-21 18:32:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:07,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667988318] [2024-06-21 18:32:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667988318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:07,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:07,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:32:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57167866] [2024-06-21 18:32:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:07,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:32:07,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:32:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:32:07,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:32:07,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 536 transitions, 10478 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:07,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:07,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:32:07,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:09,995 INFO L124 PetriNetUnfolderBase]: 4780/7659 cut-off events. [2024-06-21 18:32:09,995 INFO L125 PetriNetUnfolderBase]: For 641838/641841 co-relation queries the response was YES. [2024-06-21 18:32:10,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65826 conditions, 7659 events. 4780/7659 cut-off events. For 641838/641841 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 49095 event pairs, 965 based on Foata normal form. 22/7659 useless extension candidates. Maximal degree in co-relation 65677. Up to 6108 conditions per place. [2024-06-21 18:32:10,125 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 344 selfloop transitions, 225 changer transitions 0/574 dead transitions. [2024-06-21 18:32:10,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 574 transitions, 11867 flow [2024-06-21 18:32:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:32:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:32:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 18:32:10,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-21 18:32:10,133 INFO L175 Difference]: Start difference. First operand has 305 places, 536 transitions, 10478 flow. Second operand 10 states and 191 transitions. [2024-06-21 18:32:10,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 574 transitions, 11867 flow [2024-06-21 18:32:11,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 574 transitions, 11558 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 18:32:11,616 INFO L231 Difference]: Finished difference. Result has 309 places, 537 transitions, 10677 flow [2024-06-21 18:32:11,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10169, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10677, PETRI_PLACES=309, PETRI_TRANSITIONS=537} [2024-06-21 18:32:11,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 18:32:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 537 transitions, 10677 flow [2024-06-21 18:32:11,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:11,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:11,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:11,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:32:11,617 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:11,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1357750698, now seen corresponding path program 12 times [2024-06-21 18:32:11,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:11,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456219776] [2024-06-21 18:32:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:13,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456219776] [2024-06-21 18:32:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456219776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:13,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:13,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:32:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287575822] [2024-06-21 18:32:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:32:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:32:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:32:13,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:32:13,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 537 transitions, 10677 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:13,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:13,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:32:13,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:16,088 INFO L124 PetriNetUnfolderBase]: 4855/7785 cut-off events. [2024-06-21 18:32:16,088 INFO L125 PetriNetUnfolderBase]: For 668631/668634 co-relation queries the response was YES. [2024-06-21 18:32:16,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67397 conditions, 7785 events. 4855/7785 cut-off events. For 668631/668634 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 50217 event pairs, 986 based on Foata normal form. 22/7785 useless extension candidates. Maximal degree in co-relation 67247. Up to 6233 conditions per place. [2024-06-21 18:32:16,180 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 368 selfloop transitions, 205 changer transitions 0/578 dead transitions. [2024-06-21 18:32:16,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 578 transitions, 12131 flow [2024-06-21 18:32:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:32:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:32:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 18:32:16,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-21 18:32:16,181 INFO L175 Difference]: Start difference. First operand has 309 places, 537 transitions, 10677 flow. Second operand 10 states and 194 transitions. [2024-06-21 18:32:16,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 578 transitions, 12131 flow [2024-06-21 18:32:17,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 578 transitions, 11573 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 18:32:17,748 INFO L231 Difference]: Finished difference. Result has 310 places, 538 transitions, 10589 flow [2024-06-21 18:32:17,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10589, PETRI_PLACES=310, PETRI_TRANSITIONS=538} [2024-06-21 18:32:17,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-21 18:32:17,749 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 538 transitions, 10589 flow [2024-06-21 18:32:17,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:17,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:17,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:17,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:32:17,750 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:17,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1351494588, now seen corresponding path program 13 times [2024-06-21 18:32:17,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:17,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305648549] [2024-06-21 18:32:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:17,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:19,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:19,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305648549] [2024-06-21 18:32:19,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305648549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:19,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:19,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:32:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454194945] [2024-06-21 18:32:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:19,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:32:19,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:32:19,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:32:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:32:19,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 538 transitions, 10589 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:19,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:19,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:32:19,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:22,534 INFO L124 PetriNetUnfolderBase]: 4905/7877 cut-off events. [2024-06-21 18:32:22,535 INFO L125 PetriNetUnfolderBase]: For 680138/680141 co-relation queries the response was YES. [2024-06-21 18:32:22,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67566 conditions, 7877 events. 4905/7877 cut-off events. For 680138/680141 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 50891 event pairs, 988 based on Foata normal form. 22/7877 useless extension candidates. Maximal degree in co-relation 67416. Up to 6319 conditions per place. [2024-06-21 18:32:22,644 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 367 selfloop transitions, 207 changer transitions 0/579 dead transitions. [2024-06-21 18:32:22,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 579 transitions, 12047 flow [2024-06-21 18:32:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:32:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:32:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:32:22,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 18:32:22,646 INFO L175 Difference]: Start difference. First operand has 310 places, 538 transitions, 10589 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:32:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 579 transitions, 12047 flow [2024-06-21 18:32:24,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 579 transitions, 11518 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 18:32:24,393 INFO L231 Difference]: Finished difference. Result has 312 places, 539 transitions, 10536 flow [2024-06-21 18:32:24,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10060, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10536, PETRI_PLACES=312, PETRI_TRANSITIONS=539} [2024-06-21 18:32:24,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-21 18:32:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 539 transitions, 10536 flow [2024-06-21 18:32:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:24,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:32:24,394 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1351316958, now seen corresponding path program 14 times [2024-06-21 18:32:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253448623] [2024-06-21 18:32:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:26,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:26,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253448623] [2024-06-21 18:32:26,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253448623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:26,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:26,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:32:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790500560] [2024-06-21 18:32:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:26,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:32:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:32:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:32:26,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:32:26,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 539 transitions, 10536 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:26,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:26,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:32:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:28,838 INFO L124 PetriNetUnfolderBase]: 4877/7836 cut-off events. [2024-06-21 18:32:28,839 INFO L125 PetriNetUnfolderBase]: For 661669/661672 co-relation queries the response was YES. [2024-06-21 18:32:28,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66339 conditions, 7836 events. 4877/7836 cut-off events. For 661669/661672 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 50644 event pairs, 949 based on Foata normal form. 18/7832 useless extension candidates. Maximal degree in co-relation 66189. Up to 5857 conditions per place. [2024-06-21 18:32:28,935 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 368 selfloop transitions, 213 changer transitions 0/586 dead transitions. [2024-06-21 18:32:28,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 586 transitions, 12031 flow [2024-06-21 18:32:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:32:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:32:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 18:32:28,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:32:28,937 INFO L175 Difference]: Start difference. First operand has 312 places, 539 transitions, 10536 flow. Second operand 10 states and 195 transitions. [2024-06-21 18:32:28,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 586 transitions, 12031 flow [2024-06-21 18:32:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 586 transitions, 11539 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 18:32:30,553 INFO L231 Difference]: Finished difference. Result has 314 places, 542 transitions, 10572 flow [2024-06-21 18:32:30,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10044, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10572, PETRI_PLACES=314, PETRI_TRANSITIONS=542} [2024-06-21 18:32:30,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 18:32:30,554 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 542 transitions, 10572 flow [2024-06-21 18:32:30,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:30,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:30,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:32:30,554 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:30,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash -859418883, now seen corresponding path program 3 times [2024-06-21 18:32:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262349009] [2024-06-21 18:32:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:31,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262349009] [2024-06-21 18:32:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262349009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:31,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:31,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:32:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811298227] [2024-06-21 18:32:31,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:31,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:32:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:32:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:32:31,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:32:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 542 transitions, 10572 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:32:31,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:33,681 INFO L124 PetriNetUnfolderBase]: 4506/7380 cut-off events. [2024-06-21 18:32:33,682 INFO L125 PetriNetUnfolderBase]: For 647339/647365 co-relation queries the response was YES. [2024-06-21 18:32:33,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63440 conditions, 7380 events. 4506/7380 cut-off events. For 647339/647365 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48985 event pairs, 1004 based on Foata normal form. 19/7313 useless extension candidates. Maximal degree in co-relation 63289. Up to 6509 conditions per place. [2024-06-21 18:32:33,792 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 139 changer transitions 0/557 dead transitions. [2024-06-21 18:32:33,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 557 transitions, 11718 flow [2024-06-21 18:32:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:32:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:32:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 18:32:33,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:32:33,794 INFO L175 Difference]: Start difference. First operand has 314 places, 542 transitions, 10572 flow. Second operand 8 states and 152 transitions. [2024-06-21 18:32:33,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 557 transitions, 11718 flow [2024-06-21 18:32:35,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 557 transitions, 11279 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 18:32:35,358 INFO L231 Difference]: Finished difference. Result has 316 places, 542 transitions, 10426 flow [2024-06-21 18:32:35,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10133, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10426, PETRI_PLACES=316, PETRI_TRANSITIONS=542} [2024-06-21 18:32:35,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-21 18:32:35,359 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 542 transitions, 10426 flow [2024-06-21 18:32:35,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:35,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:35,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:35,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:32:35,360 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:35,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash 70174585, now seen corresponding path program 4 times [2024-06-21 18:32:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:35,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900354760] [2024-06-21 18:32:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900354760] [2024-06-21 18:32:36,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900354760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:36,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:36,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:32:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775346054] [2024-06-21 18:32:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:36,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:32:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:32:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:32:36,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:32:36,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 542 transitions, 10426 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:36,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:36,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:32:36,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:38,407 INFO L124 PetriNetUnfolderBase]: 4524/7407 cut-off events. [2024-06-21 18:32:38,408 INFO L125 PetriNetUnfolderBase]: For 657237/657263 co-relation queries the response was YES. [2024-06-21 18:32:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63309 conditions, 7407 events. 4524/7407 cut-off events. For 657237/657263 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 49146 event pairs, 995 based on Foata normal form. 17/7338 useless extension candidates. Maximal degree in co-relation 63158. Up to 6469 conditions per place. [2024-06-21 18:32:38,523 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 387 selfloop transitions, 155 changer transitions 0/562 dead transitions. [2024-06-21 18:32:38,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 562 transitions, 11825 flow [2024-06-21 18:32:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:32:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:32:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 18:32:38,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:32:38,526 INFO L175 Difference]: Start difference. First operand has 316 places, 542 transitions, 10426 flow. Second operand 8 states and 152 transitions. [2024-06-21 18:32:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 562 transitions, 11825 flow [2024-06-21 18:32:40,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 562 transitions, 11209 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-21 18:32:40,130 INFO L231 Difference]: Finished difference. Result has 314 places, 549 transitions, 10314 flow [2024-06-21 18:32:40,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9810, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10314, PETRI_PLACES=314, PETRI_TRANSITIONS=549} [2024-06-21 18:32:40,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 18:32:40,131 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 549 transitions, 10314 flow [2024-06-21 18:32:40,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:40,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:40,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:40,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:32:40,131 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:40,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash 616838415, now seen corresponding path program 5 times [2024-06-21 18:32:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:40,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132372986] [2024-06-21 18:32:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:41,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:41,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132372986] [2024-06-21 18:32:41,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132372986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:41,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:41,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:32:41,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541383208] [2024-06-21 18:32:41,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:41,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:32:41,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:32:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:32:41,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:32:41,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 549 transitions, 10314 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:41,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:41,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:32:41,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:43,192 INFO L124 PetriNetUnfolderBase]: 4529/7419 cut-off events. [2024-06-21 18:32:43,192 INFO L125 PetriNetUnfolderBase]: For 664968/664998 co-relation queries the response was YES. [2024-06-21 18:32:43,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63439 conditions, 7419 events. 4529/7419 cut-off events. For 664968/664998 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49343 event pairs, 1031 based on Foata normal form. 13/7332 useless extension candidates. Maximal degree in co-relation 63287. Up to 6289 conditions per place. [2024-06-21 18:32:43,301 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 193 changer transitions 0/563 dead transitions. [2024-06-21 18:32:43,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 563 transitions, 11768 flow [2024-06-21 18:32:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:32:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:32:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:32:43,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 18:32:43,303 INFO L175 Difference]: Start difference. First operand has 314 places, 549 transitions, 10314 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:32:43,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 563 transitions, 11768 flow [2024-06-21 18:32:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 563 transitions, 11457 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 18:32:45,016 INFO L231 Difference]: Finished difference. Result has 317 places, 552 transitions, 10455 flow [2024-06-21 18:32:45,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10003, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10455, PETRI_PLACES=317, PETRI_TRANSITIONS=552} [2024-06-21 18:32:45,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-21 18:32:45,017 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 552 transitions, 10455 flow [2024-06-21 18:32:45,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:45,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:45,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:32:45,018 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:45,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash 611124495, now seen corresponding path program 6 times [2024-06-21 18:32:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:45,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021987690] [2024-06-21 18:32:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:45,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:46,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:46,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021987690] [2024-06-21 18:32:46,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021987690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:46,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:46,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:32:46,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485419734] [2024-06-21 18:32:46,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:46,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:32:46,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:46,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:32:46,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:32:46,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:32:46,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 552 transitions, 10455 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:46,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:46,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:32:46,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:48,097 INFO L124 PetriNetUnfolderBase]: 4521/7407 cut-off events. [2024-06-21 18:32:48,098 INFO L125 PetriNetUnfolderBase]: For 678421/678451 co-relation queries the response was YES. [2024-06-21 18:32:48,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63533 conditions, 7407 events. 4521/7407 cut-off events. For 678421/678451 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 49243 event pairs, 1031 based on Foata normal form. 14/7321 useless extension candidates. Maximal degree in co-relation 63380. Up to 6281 conditions per place. [2024-06-21 18:32:48,208 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 178 changer transitions 0/562 dead transitions. [2024-06-21 18:32:48,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 562 transitions, 11709 flow [2024-06-21 18:32:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:32:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:32:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 18:32:48,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 18:32:48,210 INFO L175 Difference]: Start difference. First operand has 317 places, 552 transitions, 10455 flow. Second operand 8 states and 151 transitions. [2024-06-21 18:32:48,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 562 transitions, 11709 flow [2024-06-21 18:32:49,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 562 transitions, 11224 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 18:32:49,871 INFO L231 Difference]: Finished difference. Result has 319 places, 552 transitions, 10334 flow [2024-06-21 18:32:49,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9970, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10334, PETRI_PLACES=319, PETRI_TRANSITIONS=552} [2024-06-21 18:32:49,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-21 18:32:49,872 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 552 transitions, 10334 flow [2024-06-21 18:32:49,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:49,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:49,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:49,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:32:49,873 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:49,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash 719578180, now seen corresponding path program 1 times [2024-06-21 18:32:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:49,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5361805] [2024-06-21 18:32:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:49,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:51,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:51,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5361805] [2024-06-21 18:32:51,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5361805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:51,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:51,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:32:51,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949167057] [2024-06-21 18:32:51,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:51,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:32:51,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:51,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:32:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:32:52,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:32:52,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 552 transitions, 10334 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:52,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:52,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:32:52,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:32:54,421 INFO L124 PetriNetUnfolderBase]: 4924/7869 cut-off events. [2024-06-21 18:32:54,422 INFO L125 PetriNetUnfolderBase]: For 702331/702331 co-relation queries the response was YES. [2024-06-21 18:32:54,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66623 conditions, 7869 events. 4924/7869 cut-off events. For 702331/702331 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 50597 event pairs, 1019 based on Foata normal form. 4/7816 useless extension candidates. Maximal degree in co-relation 66470. Up to 6447 conditions per place. [2024-06-21 18:32:54,517 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 341 selfloop transitions, 250 changer transitions 0/596 dead transitions. [2024-06-21 18:32:54,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 596 transitions, 11870 flow [2024-06-21 18:32:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:32:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:32:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 18:32:54,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:32:54,519 INFO L175 Difference]: Start difference. First operand has 319 places, 552 transitions, 10334 flow. Second operand 11 states and 209 transitions. [2024-06-21 18:32:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 596 transitions, 11870 flow [2024-06-21 18:32:56,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 596 transitions, 11498 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:32:56,012 INFO L231 Difference]: Finished difference. Result has 324 places, 561 transitions, 10667 flow [2024-06-21 18:32:56,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9962, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10667, PETRI_PLACES=324, PETRI_TRANSITIONS=561} [2024-06-21 18:32:56,013 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-21 18:32:56,013 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 561 transitions, 10667 flow [2024-06-21 18:32:56,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:56,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:32:56,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:32:56,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:32:56,013 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:32:56,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:32:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1157247366, now seen corresponding path program 2 times [2024-06-21 18:32:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:32:56,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059305583] [2024-06-21 18:32:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:32:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:32:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:32:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:32:57,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:32:57,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059305583] [2024-06-21 18:32:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059305583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:32:57,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:32:57,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:32:57,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415346681] [2024-06-21 18:32:57,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:32:57,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:32:57,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:32:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:32:57,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:32:58,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:32:58,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 561 transitions, 10667 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:32:58,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:32:58,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:32:58,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:00,508 INFO L124 PetriNetUnfolderBase]: 4983/7968 cut-off events. [2024-06-21 18:33:00,508 INFO L125 PetriNetUnfolderBase]: For 745046/745046 co-relation queries the response was YES. [2024-06-21 18:33:00,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68905 conditions, 7968 events. 4983/7968 cut-off events. For 745046/745046 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 51379 event pairs, 1004 based on Foata normal form. 7/7916 useless extension candidates. Maximal degree in co-relation 68750. Up to 6476 conditions per place. [2024-06-21 18:33:00,629 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 346 selfloop transitions, 289 changer transitions 0/640 dead transitions. [2024-06-21 18:33:00,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 640 transitions, 13144 flow [2024-06-21 18:33:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:33:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:33:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2024-06-21 18:33:00,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329159212880143 [2024-06-21 18:33:00,631 INFO L175 Difference]: Start difference. First operand has 324 places, 561 transitions, 10667 flow. Second operand 13 states and 242 transitions. [2024-06-21 18:33:00,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 640 transitions, 13144 flow [2024-06-21 18:33:02,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 640 transitions, 12534 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 18:33:02,431 INFO L231 Difference]: Finished difference. Result has 332 places, 602 transitions, 11608 flow [2024-06-21 18:33:02,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10115, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11608, PETRI_PLACES=332, PETRI_TRANSITIONS=602} [2024-06-21 18:33:02,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-21 18:33:02,432 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 602 transitions, 11608 flow [2024-06-21 18:33:02,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:02,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:02,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:33:02,433 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash -773601508, now seen corresponding path program 3 times [2024-06-21 18:33:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:02,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754663295] [2024-06-21 18:33:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:04,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:04,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754663295] [2024-06-21 18:33:04,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754663295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:04,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:04,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:33:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353379969] [2024-06-21 18:33:04,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:04,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:33:04,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:33:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:33:04,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:33:04,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 602 transitions, 11608 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:04,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:04,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:33:04,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:07,175 INFO L124 PetriNetUnfolderBase]: 5000/7995 cut-off events. [2024-06-21 18:33:07,175 INFO L125 PetriNetUnfolderBase]: For 777668/777668 co-relation queries the response was YES. [2024-06-21 18:33:07,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70970 conditions, 7995 events. 5000/7995 cut-off events. For 777668/777668 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 51563 event pairs, 1041 based on Foata normal form. 4/7945 useless extension candidates. Maximal degree in co-relation 70811. Up to 6558 conditions per place. [2024-06-21 18:33:07,299 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 367 selfloop transitions, 268 changer transitions 0/640 dead transitions. [2024-06-21 18:33:07,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 640 transitions, 13158 flow [2024-06-21 18:33:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:33:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:33:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 18:33:07,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:33:07,301 INFO L175 Difference]: Start difference. First operand has 332 places, 602 transitions, 11608 flow. Second operand 11 states and 209 transitions. [2024-06-21 18:33:07,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 640 transitions, 13158 flow [2024-06-21 18:33:09,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 640 transitions, 12542 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-21 18:33:09,216 INFO L231 Difference]: Finished difference. Result has 338 places, 605 transitions, 11634 flow [2024-06-21 18:33:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10996, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11634, PETRI_PLACES=338, PETRI_TRANSITIONS=605} [2024-06-21 18:33:09,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-21 18:33:09,217 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 605 transitions, 11634 flow [2024-06-21 18:33:09,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:09,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:33:09,217 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:09,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1146771846, now seen corresponding path program 4 times [2024-06-21 18:33:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201274942] [2024-06-21 18:33:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:11,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:11,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201274942] [2024-06-21 18:33:11,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201274942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:11,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:11,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:33:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127376289] [2024-06-21 18:33:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:11,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:33:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:11,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:33:11,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:33:11,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:33:11,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 605 transitions, 11634 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:11,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:11,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:33:11,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:13,721 INFO L124 PetriNetUnfolderBase]: 5144/8245 cut-off events. [2024-06-21 18:33:13,721 INFO L125 PetriNetUnfolderBase]: For 830136/830136 co-relation queries the response was YES. [2024-06-21 18:33:13,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72893 conditions, 8245 events. 5144/8245 cut-off events. For 830136/830136 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 53685 event pairs, 867 based on Foata normal form. 4/8190 useless extension candidates. Maximal degree in co-relation 72732. Up to 6399 conditions per place. [2024-06-21 18:33:13,850 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 355 selfloop transitions, 293 changer transitions 0/653 dead transitions. [2024-06-21 18:33:13,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 653 transitions, 13563 flow [2024-06-21 18:33:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:33:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:33:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 18:33:13,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 18:33:13,851 INFO L175 Difference]: Start difference. First operand has 338 places, 605 transitions, 11634 flow. Second operand 11 states and 215 transitions. [2024-06-21 18:33:13,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 653 transitions, 13563 flow [2024-06-21 18:33:16,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 653 transitions, 12432 flow, removed 39 selfloop flow, removed 13 redundant places. [2024-06-21 18:33:16,118 INFO L231 Difference]: Finished difference. Result has 337 places, 612 transitions, 11328 flow [2024-06-21 18:33:16,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10503, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11328, PETRI_PLACES=337, PETRI_TRANSITIONS=612} [2024-06-21 18:33:16,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-21 18:33:16,119 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 612 transitions, 11328 flow [2024-06-21 18:33:16,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:16,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:16,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:16,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:33:16,119 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:16,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash -803928454, now seen corresponding path program 5 times [2024-06-21 18:33:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:16,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257293524] [2024-06-21 18:33:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:16,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:18,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:18,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257293524] [2024-06-21 18:33:18,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257293524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:18,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:18,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:33:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905241883] [2024-06-21 18:33:18,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:18,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:33:18,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:18,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:33:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:33:18,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:33:18,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 612 transitions, 11328 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:18,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:18,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:33:18,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:20,764 INFO L124 PetriNetUnfolderBase]: 5136/8225 cut-off events. [2024-06-21 18:33:20,764 INFO L125 PetriNetUnfolderBase]: For 826094/826094 co-relation queries the response was YES. [2024-06-21 18:33:20,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72902 conditions, 8225 events. 5136/8225 cut-off events. For 826094/826094 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 53424 event pairs, 1054 based on Foata normal form. 4/8170 useless extension candidates. Maximal degree in co-relation 72740. Up to 6789 conditions per place. [2024-06-21 18:33:20,881 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 373 selfloop transitions, 271 changer transitions 0/649 dead transitions. [2024-06-21 18:33:20,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 649 transitions, 12862 flow [2024-06-21 18:33:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:33:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:33:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 18:33:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:33:20,883 INFO L175 Difference]: Start difference. First operand has 337 places, 612 transitions, 11328 flow. Second operand 11 states and 209 transitions. [2024-06-21 18:33:20,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 649 transitions, 12862 flow [2024-06-21 18:33:22,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 649 transitions, 12494 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 18:33:22,896 INFO L231 Difference]: Finished difference. Result has 344 places, 614 transitions, 11569 flow [2024-06-21 18:33:22,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10973, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11569, PETRI_PLACES=344, PETRI_TRANSITIONS=614} [2024-06-21 18:33:22,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-21 18:33:22,898 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 614 transitions, 11569 flow [2024-06-21 18:33:22,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:22,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:22,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:22,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:33:22,898 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:22,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1315281845, now seen corresponding path program 2 times [2024-06-21 18:33:22,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:22,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613154667] [2024-06-21 18:33:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:22,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:25,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:25,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613154667] [2024-06-21 18:33:25,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613154667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:25,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:33:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383507012] [2024-06-21 18:33:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:25,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:33:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:33:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:33:25,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:33:25,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 614 transitions, 11569 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-21 18:33:25,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:25,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:33:25,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:27,955 INFO L124 PetriNetUnfolderBase]: 4769/7858 cut-off events. [2024-06-21 18:33:27,955 INFO L125 PetriNetUnfolderBase]: For 835465/835495 co-relation queries the response was YES. [2024-06-21 18:33:28,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71220 conditions, 7858 events. 4769/7858 cut-off events. For 835465/835495 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 53315 event pairs, 1199 based on Foata normal form. 17/7815 useless extension candidates. Maximal degree in co-relation 71055. Up to 7208 conditions per place. [2024-06-21 18:33:28,080 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 591 selfloop transitions, 19 changer transitions 0/630 dead transitions. [2024-06-21 18:33:28,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 630 transitions, 12915 flow [2024-06-21 18:33:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:33:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:33:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:33:28,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-21 18:33:28,082 INFO L175 Difference]: Start difference. First operand has 344 places, 614 transitions, 11569 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:33:28,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 630 transitions, 12915 flow [2024-06-21 18:33:30,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 630 transitions, 12180 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-21 18:33:30,176 INFO L231 Difference]: Finished difference. Result has 343 places, 620 transitions, 10988 flow [2024-06-21 18:33:30,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10834, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10988, PETRI_PLACES=343, PETRI_TRANSITIONS=620} [2024-06-21 18:33:30,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-21 18:33:30,177 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 620 transitions, 10988 flow [2024-06-21 18:33:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-21 18:33:30,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:30,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:30,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:33:30,177 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:30,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash 625866080, now seen corresponding path program 4 times [2024-06-21 18:33:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:30,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018186505] [2024-06-21 18:33:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:32,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018186505] [2024-06-21 18:33:32,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018186505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:32,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:32,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:33:32,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925495722] [2024-06-21 18:33:32,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:32,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:33:32,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:32,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:33:32,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:33:32,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:33:32,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 620 transitions, 10988 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:32,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:32,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:33:32,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:34,591 INFO L124 PetriNetUnfolderBase]: 4810/7908 cut-off events. [2024-06-21 18:33:34,591 INFO L125 PetriNetUnfolderBase]: For 859003/859033 co-relation queries the response was YES. [2024-06-21 18:33:34,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71253 conditions, 7908 events. 4810/7908 cut-off events. For 859003/859033 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 53449 event pairs, 935 based on Foata normal form. 15/7823 useless extension candidates. Maximal degree in co-relation 71087. Up to 6496 conditions per place. [2024-06-21 18:33:34,718 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 414 selfloop transitions, 212 changer transitions 0/646 dead transitions. [2024-06-21 18:33:34,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 646 transitions, 13090 flow [2024-06-21 18:33:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:33:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:33:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:33:34,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:33:34,720 INFO L175 Difference]: Start difference. First operand has 343 places, 620 transitions, 10988 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:33:34,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 646 transitions, 13090 flow [2024-06-21 18:33:37,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 646 transitions, 12956 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 18:33:37,160 INFO L231 Difference]: Finished difference. Result has 348 places, 631 transitions, 11573 flow [2024-06-21 18:33:37,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10854, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11573, PETRI_PLACES=348, PETRI_TRANSITIONS=631} [2024-06-21 18:33:37,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-21 18:33:37,161 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 631 transitions, 11573 flow [2024-06-21 18:33:37,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:37,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:37,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:37,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:33:37,162 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:37,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1315266965, now seen corresponding path program 3 times [2024-06-21 18:33:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151022288] [2024-06-21 18:33:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:37,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:38,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:38,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151022288] [2024-06-21 18:33:38,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151022288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:38,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:38,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:33:38,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049210254] [2024-06-21 18:33:38,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:38,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:33:38,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:33:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:33:39,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:33:39,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 631 transitions, 11573 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:39,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:39,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:33:39,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:41,074 INFO L124 PetriNetUnfolderBase]: 4823/7942 cut-off events. [2024-06-21 18:33:41,074 INFO L125 PetriNetUnfolderBase]: For 890534/890570 co-relation queries the response was YES. [2024-06-21 18:33:41,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73337 conditions, 7942 events. 4823/7942 cut-off events. For 890534/890570 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 53786 event pairs, 1017 based on Foata normal form. 22/7910 useless extension candidates. Maximal degree in co-relation 73169. Up to 7199 conditions per place. [2024-06-21 18:33:41,203 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 574 selfloop transitions, 59 changer transitions 0/654 dead transitions. [2024-06-21 18:33:41,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 654 transitions, 13471 flow [2024-06-21 18:33:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:33:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:33:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 18:33:41,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-21 18:33:41,205 INFO L175 Difference]: Start difference. First operand has 348 places, 631 transitions, 11573 flow. Second operand 7 states and 154 transitions. [2024-06-21 18:33:41,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 654 transitions, 13471 flow [2024-06-21 18:33:43,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 654 transitions, 13096 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-21 18:33:43,796 INFO L231 Difference]: Finished difference. Result has 351 places, 640 transitions, 11598 flow [2024-06-21 18:33:43,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11198, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11598, PETRI_PLACES=351, PETRI_TRANSITIONS=640} [2024-06-21 18:33:43,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-21 18:33:43,796 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 640 transitions, 11598 flow [2024-06-21 18:33:43,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:43,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:43,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:43,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:33:43,797 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:43,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:43,797 INFO L85 PathProgramCache]: Analyzing trace with hash 611134415, now seen corresponding path program 4 times [2024-06-21 18:33:43,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:43,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088906017] [2024-06-21 18:33:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:43,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:45,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088906017] [2024-06-21 18:33:45,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088906017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:45,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:45,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:33:45,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144327646] [2024-06-21 18:33:45,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:45,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:33:45,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:45,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:33:45,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:33:45,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:33:45,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 640 transitions, 11598 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:45,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:45,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:33:45,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:47,783 INFO L124 PetriNetUnfolderBase]: 4817/7942 cut-off events. [2024-06-21 18:33:47,784 INFO L125 PetriNetUnfolderBase]: For 897368/897404 co-relation queries the response was YES. [2024-06-21 18:33:47,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72846 conditions, 7942 events. 4817/7942 cut-off events. For 897368/897404 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 53890 event pairs, 1016 based on Foata normal form. 22/7910 useless extension candidates. Maximal degree in co-relation 72676. Up to 7240 conditions per place. [2024-06-21 18:33:47,909 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 596 selfloop transitions, 35 changer transitions 0/651 dead transitions. [2024-06-21 18:33:47,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 651 transitions, 12896 flow [2024-06-21 18:33:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:33:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:33:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 18:33:47,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 18:33:47,910 INFO L175 Difference]: Start difference. First operand has 351 places, 640 transitions, 11598 flow. Second operand 8 states and 153 transitions. [2024-06-21 18:33:47,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 651 transitions, 12896 flow [2024-06-21 18:33:50,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 651 transitions, 12701 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-21 18:33:50,445 INFO L231 Difference]: Finished difference. Result has 357 places, 640 transitions, 11479 flow [2024-06-21 18:33:50,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11403, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11479, PETRI_PLACES=357, PETRI_TRANSITIONS=640} [2024-06-21 18:33:50,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-21 18:33:50,446 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 640 transitions, 11479 flow [2024-06-21 18:33:50,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:50,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:50,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:33:50,447 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:50,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1300521350, now seen corresponding path program 5 times [2024-06-21 18:33:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:50,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568146224] [2024-06-21 18:33:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:50,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:52,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568146224] [2024-06-21 18:33:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568146224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:52,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:52,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:33:52,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926541241] [2024-06-21 18:33:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:52,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:33:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:33:52,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:33:52,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:33:52,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 640 transitions, 11479 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:52,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:52,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:33:52,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:33:54,649 INFO L124 PetriNetUnfolderBase]: 4835/7954 cut-off events. [2024-06-21 18:33:54,649 INFO L125 PetriNetUnfolderBase]: For 915783/915813 co-relation queries the response was YES. [2024-06-21 18:33:54,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72949 conditions, 7954 events. 4835/7954 cut-off events. For 915783/915813 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 53873 event pairs, 941 based on Foata normal form. 15/7869 useless extension candidates. Maximal degree in co-relation 72776. Up to 6764 conditions per place. [2024-06-21 18:33:54,779 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 451 selfloop transitions, 184 changer transitions 0/655 dead transitions. [2024-06-21 18:33:54,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 655 transitions, 13045 flow [2024-06-21 18:33:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:33:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:33:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 18:33:54,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-21 18:33:54,781 INFO L175 Difference]: Start difference. First operand has 357 places, 640 transitions, 11479 flow. Second operand 9 states and 167 transitions. [2024-06-21 18:33:54,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 655 transitions, 13045 flow [2024-06-21 18:33:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 655 transitions, 12933 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:33:57,000 INFO L231 Difference]: Finished difference. Result has 359 places, 644 transitions, 11852 flow [2024-06-21 18:33:57,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11367, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11852, PETRI_PLACES=359, PETRI_TRANSITIONS=644} [2024-06-21 18:33:57,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-21 18:33:57,001 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 644 transitions, 11852 flow [2024-06-21 18:33:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:57,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:33:57,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:33:57,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:33:57,001 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:33:57,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:33:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash 611133950, now seen corresponding path program 6 times [2024-06-21 18:33:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:33:57,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560534789] [2024-06-21 18:33:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:33:57,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:33:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:33:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:33:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:33:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560534789] [2024-06-21 18:33:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560534789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:33:58,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:33:58,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:33:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464898750] [2024-06-21 18:33:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:33:58,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:33:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:33:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:33:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:33:58,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:33:58,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 644 transitions, 11852 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:33:58,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:33:58,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:33:58,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:00,709 INFO L124 PetriNetUnfolderBase]: 4872/8012 cut-off events. [2024-06-21 18:34:00,709 INFO L125 PetriNetUnfolderBase]: For 949152/949182 co-relation queries the response was YES. [2024-06-21 18:34:00,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74695 conditions, 8012 events. 4872/8012 cut-off events. For 949152/949182 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 54359 event pairs, 939 based on Foata normal form. 15/7927 useless extension candidates. Maximal degree in co-relation 74521. Up to 6782 conditions per place. [2024-06-21 18:34:00,854 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 456 selfloop transitions, 188 changer transitions 0/664 dead transitions. [2024-06-21 18:34:00,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 664 transitions, 13712 flow [2024-06-21 18:34:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:34:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:34:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:34:00,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 18:34:00,856 INFO L175 Difference]: Start difference. First operand has 359 places, 644 transitions, 11852 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:34:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 664 transitions, 13712 flow [2024-06-21 18:34:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 664 transitions, 13261 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 18:34:03,360 INFO L231 Difference]: Finished difference. Result has 362 places, 652 transitions, 12020 flow [2024-06-21 18:34:03,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11401, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12020, PETRI_PLACES=362, PETRI_TRANSITIONS=652} [2024-06-21 18:34:03,360 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 18:34:03,361 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 652 transitions, 12020 flow [2024-06-21 18:34:03,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:03,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:34:03,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:34:03,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:34:03,361 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:34:03,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:34:03,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1523710416, now seen corresponding path program 15 times [2024-06-21 18:34:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:34:03,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299008040] [2024-06-21 18:34:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:34:03,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:34:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:34:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:34:04,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:34:04,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299008040] [2024-06-21 18:34:04,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299008040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:34:04,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:34:04,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:34:04,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612937343] [2024-06-21 18:34:04,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:34:04,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:34:04,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:34:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:34:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:34:04,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:34:04,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 652 transitions, 12020 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:04,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:34:04,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:34:04,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:07,769 INFO L124 PetriNetUnfolderBase]: 6170/9996 cut-off events. [2024-06-21 18:34:07,770 INFO L125 PetriNetUnfolderBase]: For 1092040/1092043 co-relation queries the response was YES. [2024-06-21 18:34:07,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87468 conditions, 9996 events. 6170/9996 cut-off events. For 1092040/1092043 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 68142 event pairs, 1283 based on Foata normal form. 16/10008 useless extension candidates. Maximal degree in co-relation 87292. Up to 6497 conditions per place. [2024-06-21 18:34:07,928 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 473 selfloop transitions, 259 changer transitions 0/737 dead transitions. [2024-06-21 18:34:07,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 737 transitions, 14434 flow [2024-06-21 18:34:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:34:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:34:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-21 18:34:07,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-21 18:34:07,930 INFO L175 Difference]: Start difference. First operand has 362 places, 652 transitions, 12020 flow. Second operand 10 states and 212 transitions. [2024-06-21 18:34:07,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 737 transitions, 14434 flow [2024-06-21 18:34:11,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 737 transitions, 14089 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 18:34:11,074 INFO L231 Difference]: Finished difference. Result has 369 places, 677 transitions, 12759 flow [2024-06-21 18:34:11,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11675, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12759, PETRI_PLACES=369, PETRI_TRANSITIONS=677} [2024-06-21 18:34:11,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 18:34:11,077 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 677 transitions, 12759 flow [2024-06-21 18:34:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:11,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:34:11,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:34:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:34:11,078 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:34:11,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:34:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash -653991098, now seen corresponding path program 16 times [2024-06-21 18:34:11,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:34:11,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59335815] [2024-06-21 18:34:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:34:11,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:34:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:34:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:34:12,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:34:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59335815] [2024-06-21 18:34:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59335815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:34:12,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:34:12,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:34:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858527484] [2024-06-21 18:34:12,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:34:12,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:34:12,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:34:12,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:34:12,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:34:12,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:34:12,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 677 transitions, 12759 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:12,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:34:12,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:34:12,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:15,761 INFO L124 PetriNetUnfolderBase]: 6279/10189 cut-off events. [2024-06-21 18:34:15,762 INFO L125 PetriNetUnfolderBase]: For 1130166/1130169 co-relation queries the response was YES. [2024-06-21 18:34:15,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89531 conditions, 10189 events. 6279/10189 cut-off events. For 1130166/1130169 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 69910 event pairs, 1300 based on Foata normal form. 36/10221 useless extension candidates. Maximal degree in co-relation 89351. Up to 8332 conditions per place. [2024-06-21 18:34:15,941 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 482 selfloop transitions, 238 changer transitions 0/725 dead transitions. [2024-06-21 18:34:15,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 725 transitions, 14511 flow [2024-06-21 18:34:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:34:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:34:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 18:34:15,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48372093023255813 [2024-06-21 18:34:15,944 INFO L175 Difference]: Start difference. First operand has 369 places, 677 transitions, 12759 flow. Second operand 10 states and 208 transitions. [2024-06-21 18:34:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 725 transitions, 14511 flow [2024-06-21 18:34:19,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 725 transitions, 14217 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 18:34:19,224 INFO L231 Difference]: Finished difference. Result has 374 places, 681 transitions, 13056 flow [2024-06-21 18:34:19,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12465, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13056, PETRI_PLACES=374, PETRI_TRANSITIONS=681} [2024-06-21 18:34:19,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-21 18:34:19,225 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 681 transitions, 13056 flow [2024-06-21 18:34:19,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:19,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:34:19,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:34:19,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:34:19,225 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:34:19,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:34:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash 210057616, now seen corresponding path program 17 times [2024-06-21 18:34:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:34:19,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763526031] [2024-06-21 18:34:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:34:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:34:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:34:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:34:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:34:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763526031] [2024-06-21 18:34:20,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763526031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:34:20,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:34:20,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:34:20,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575937666] [2024-06-21 18:34:20,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:34:20,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:34:20,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:34:20,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:34:20,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:34:20,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:34:20,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 681 transitions, 13056 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:20,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:34:20,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:34:20,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:24,312 INFO L124 PetriNetUnfolderBase]: 6392/10392 cut-off events. [2024-06-21 18:34:24,312 INFO L125 PetriNetUnfolderBase]: For 1106331/1106334 co-relation queries the response was YES. [2024-06-21 18:34:24,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91509 conditions, 10392 events. 6392/10392 cut-off events. For 1106331/1106334 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 71740 event pairs, 1305 based on Foata normal form. 16/10404 useless extension candidates. Maximal degree in co-relation 91327. Up to 8347 conditions per place. [2024-06-21 18:34:24,494 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 486 selfloop transitions, 242 changer transitions 0/733 dead transitions. [2024-06-21 18:34:24,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 733 transitions, 14828 flow [2024-06-21 18:34:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:34:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:34:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 18:34:24,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906976744186046 [2024-06-21 18:34:24,496 INFO L175 Difference]: Start difference. First operand has 374 places, 681 transitions, 13056 flow. Second operand 10 states and 211 transitions. [2024-06-21 18:34:24,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 733 transitions, 14828 flow [2024-06-21 18:34:27,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 733 transitions, 14336 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 18:34:27,697 INFO L231 Difference]: Finished difference. Result has 377 places, 685 transitions, 13159 flow [2024-06-21 18:34:27,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12564, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13159, PETRI_PLACES=377, PETRI_TRANSITIONS=685} [2024-06-21 18:34:27,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-21 18:34:27,698 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 685 transitions, 13159 flow [2024-06-21 18:34:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:27,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:34:27,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:34:27,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:34:27,698 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:34:27,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:34:27,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2081993188, now seen corresponding path program 18 times [2024-06-21 18:34:27,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:34:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931560461] [2024-06-21 18:34:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:34:27,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:34:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:34:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:34:29,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:34:29,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931560461] [2024-06-21 18:34:29,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931560461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:34:29,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:34:29,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:34:29,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893606478] [2024-06-21 18:34:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:34:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:34:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:34:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:34:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:34:29,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:34:29,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 685 transitions, 13159 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:29,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:34:29,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:34:29,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:33,077 INFO L124 PetriNetUnfolderBase]: 6488/10565 cut-off events. [2024-06-21 18:34:33,078 INFO L125 PetriNetUnfolderBase]: For 1132958/1132961 co-relation queries the response was YES. [2024-06-21 18:34:33,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92741 conditions, 10565 events. 6488/10565 cut-off events. For 1132958/1132961 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 73375 event pairs, 1329 based on Foata normal form. 16/10577 useless extension candidates. Maximal degree in co-relation 92557. Up to 8299 conditions per place. [2024-06-21 18:34:33,230 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 486 selfloop transitions, 248 changer transitions 0/739 dead transitions. [2024-06-21 18:34:33,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 739 transitions, 14956 flow [2024-06-21 18:34:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:34:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:34:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-21 18:34:33,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-21 18:34:33,232 INFO L175 Difference]: Start difference. First operand has 377 places, 685 transitions, 13159 flow. Second operand 10 states and 212 transitions. [2024-06-21 18:34:33,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 739 transitions, 14956 flow [2024-06-21 18:34:36,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 739 transitions, 14468 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 18:34:36,360 INFO L231 Difference]: Finished difference. Result has 381 places, 690 transitions, 13295 flow [2024-06-21 18:34:36,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12671, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13295, PETRI_PLACES=381, PETRI_TRANSITIONS=690} [2024-06-21 18:34:36,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 18:34:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 690 transitions, 13295 flow [2024-06-21 18:34:36,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:36,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:34:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:34:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:34:36,361 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:34:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:34:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1888366104, now seen corresponding path program 19 times [2024-06-21 18:34:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:34:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134742166] [2024-06-21 18:34:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:34:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:34:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:34:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:34:37,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:34:37,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134742166] [2024-06-21 18:34:37,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134742166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:34:37,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:34:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:34:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130879604] [2024-06-21 18:34:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:34:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:34:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:34:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:34:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:34:37,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:34:37,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 690 transitions, 13295 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:37,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:34:37,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:34:37,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:41,863 INFO L124 PetriNetUnfolderBase]: 6086/10739 cut-off events. [2024-06-21 18:34:41,864 INFO L125 PetriNetUnfolderBase]: For 1198461/1198662 co-relation queries the response was YES. [2024-06-21 18:34:41,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92490 conditions, 10739 events. 6086/10739 cut-off events. For 1198461/1198662 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 84153 event pairs, 1075 based on Foata normal form. 113/10634 useless extension candidates. Maximal degree in co-relation 92304. Up to 3936 conditions per place. [2024-06-21 18:34:42,041 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 351 selfloop transitions, 273 changer transitions 0/771 dead transitions. [2024-06-21 18:34:42,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 771 transitions, 15726 flow [2024-06-21 18:34:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:34:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:34:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 18:34:42,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-21 18:34:42,043 INFO L175 Difference]: Start difference. First operand has 381 places, 690 transitions, 13295 flow. Second operand 9 states and 207 transitions. [2024-06-21 18:34:42,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 771 transitions, 15726 flow [2024-06-21 18:34:44,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 771 transitions, 15222 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 18:34:44,969 INFO L231 Difference]: Finished difference. Result has 386 places, 718 transitions, 13953 flow [2024-06-21 18:34:44,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12791, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13953, PETRI_PLACES=386, PETRI_TRANSITIONS=718} [2024-06-21 18:34:44,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-21 18:34:44,970 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 718 transitions, 13953 flow [2024-06-21 18:34:44,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:44,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:34:44,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:34:44,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:34:44,970 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:34:44,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:34:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash 574930680, now seen corresponding path program 7 times [2024-06-21 18:34:44,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:34:44,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567459922] [2024-06-21 18:34:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:34:44,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:34:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:34:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:34:46,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:34:46,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567459922] [2024-06-21 18:34:46,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567459922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:34:46,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:34:46,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:34:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671825687] [2024-06-21 18:34:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:34:46,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:34:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:34:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:34:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:34:46,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:34:46,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 718 transitions, 13953 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:46,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:34:46,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:34:46,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:50,176 INFO L124 PetriNetUnfolderBase]: 6944/11635 cut-off events. [2024-06-21 18:34:50,176 INFO L125 PetriNetUnfolderBase]: For 1183998/1184030 co-relation queries the response was YES. [2024-06-21 18:34:50,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100171 conditions, 11635 events. 6944/11635 cut-off events. For 1183998/1184030 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 86685 event pairs, 1903 based on Foata normal form. 25/11587 useless extension candidates. Maximal degree in co-relation 99982. Up to 10411 conditions per place. [2024-06-21 18:34:50,351 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 570 selfloop transitions, 154 changer transitions 0/750 dead transitions. [2024-06-21 18:34:50,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 750 transitions, 15638 flow [2024-06-21 18:34:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:34:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:34:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:34:50,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:34:50,352 INFO L175 Difference]: Start difference. First operand has 386 places, 718 transitions, 13953 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:34:50,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 750 transitions, 15638 flow [2024-06-21 18:34:53,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 750 transitions, 15280 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 18:34:53,352 INFO L231 Difference]: Finished difference. Result has 390 places, 726 transitions, 14081 flow [2024-06-21 18:34:53,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13595, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14081, PETRI_PLACES=390, PETRI_TRANSITIONS=726} [2024-06-21 18:34:53,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-21 18:34:53,353 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 726 transitions, 14081 flow [2024-06-21 18:34:53,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:53,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:34:53,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:34:53,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:34:53,356 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:34:53,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:34:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1367883912, now seen corresponding path program 20 times [2024-06-21 18:34:53,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:34:53,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514258909] [2024-06-21 18:34:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:34:53,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:34:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:34:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:34:54,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:34:54,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514258909] [2024-06-21 18:34:54,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514258909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:34:54,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:34:54,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:34:54,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012973903] [2024-06-21 18:34:54,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:34:54,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:34:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:34:54,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:34:54,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:34:54,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:34:54,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 726 transitions, 14081 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:34:54,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:34:54,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:34:54,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:34:59,518 INFO L124 PetriNetUnfolderBase]: 8012/13201 cut-off events. [2024-06-21 18:34:59,518 INFO L125 PetriNetUnfolderBase]: For 1298953/1298958 co-relation queries the response was YES. [2024-06-21 18:34:59,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109458 conditions, 13201 events. 8012/13201 cut-off events. For 1298953/1298958 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 97203 event pairs, 1964 based on Foata normal form. 18/13215 useless extension candidates. Maximal degree in co-relation 109269. Up to 10359 conditions per place. [2024-06-21 18:34:59,718 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 531 selfloop transitions, 271 changer transitions 0/807 dead transitions. [2024-06-21 18:34:59,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 807 transitions, 16779 flow [2024-06-21 18:34:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:34:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:34:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 18:34:59,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2024-06-21 18:34:59,719 INFO L175 Difference]: Start difference. First operand has 390 places, 726 transitions, 14081 flow. Second operand 10 states and 216 transitions. [2024-06-21 18:34:59,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 807 transitions, 16779 flow [2024-06-21 18:35:02,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 807 transitions, 16392 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 18:35:02,737 INFO L231 Difference]: Finished difference. Result has 395 places, 751 transitions, 14860 flow [2024-06-21 18:35:02,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13694, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14860, PETRI_PLACES=395, PETRI_TRANSITIONS=751} [2024-06-21 18:35:02,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-21 18:35:02,738 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 751 transitions, 14860 flow [2024-06-21 18:35:02,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:02,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:02,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:02,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:35:02,738 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:02,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1372645512, now seen corresponding path program 21 times [2024-06-21 18:35:02,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:02,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983637286] [2024-06-21 18:35:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:02,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:35:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:35:04,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:35:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983637286] [2024-06-21 18:35:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983637286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:35:04,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:35:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:35:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486274295] [2024-06-21 18:35:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:35:04,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:35:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:35:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:35:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:35:04,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:35:04,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 751 transitions, 14860 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:04,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:35:04,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:35:04,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:35:09,106 INFO L124 PetriNetUnfolderBase]: 8087/13326 cut-off events. [2024-06-21 18:35:09,106 INFO L125 PetriNetUnfolderBase]: For 1351770/1351775 co-relation queries the response was YES. [2024-06-21 18:35:09,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112054 conditions, 13326 events. 8087/13326 cut-off events. For 1351770/1351775 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 98427 event pairs, 2011 based on Foata normal form. 22/13344 useless extension candidates. Maximal degree in co-relation 111862. Up to 11392 conditions per place. [2024-06-21 18:35:09,302 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 540 selfloop transitions, 253 changer transitions 0/798 dead transitions. [2024-06-21 18:35:09,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 798 transitions, 16727 flow [2024-06-21 18:35:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:35:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:35:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 18:35:09,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-21 18:35:09,304 INFO L175 Difference]: Start difference. First operand has 395 places, 751 transitions, 14860 flow. Second operand 10 states and 209 transitions. [2024-06-21 18:35:09,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 798 transitions, 16727 flow [2024-06-21 18:35:12,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 798 transitions, 16387 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 18:35:12,661 INFO L231 Difference]: Finished difference. Result has 400 places, 752 transitions, 15085 flow [2024-06-21 18:35:12,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14522, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15085, PETRI_PLACES=400, PETRI_TRANSITIONS=752} [2024-06-21 18:35:12,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-21 18:35:12,663 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 752 transitions, 15085 flow [2024-06-21 18:35:12,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:35:12,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:35:12,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:35:12,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:35:12,663 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:35:12,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:35:12,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1538879292, now seen corresponding path program 22 times [2024-06-21 18:35:12,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:35:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827183485] [2024-06-21 18:35:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:35:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:35:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat