./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 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-7724a2d-m [2024-06-27 23:16:26,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:16:26,575 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:16:26,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:16:26,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:16:26,601 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:16:26,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:16:26,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:16:26,602 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:16:26,605 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:16:26,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:16:26,605 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:16:26,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:16:26,607 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:16:26,607 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:16:26,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:16:26,607 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:16:26,607 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:16:26,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:16:26,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:16:26,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:16:26,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:16:26,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:16:26,608 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:16:26,608 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:16:26,608 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:16:26,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:16:26,609 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:16:26,609 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:16:26,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:16:26,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:16:26,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:16:26,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:16:26,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:16:26,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:16:26,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:16:26,612 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:16:26,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:16:26,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:16:26,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:16:26,893 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:16:26,893 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:16:26,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-27 23:16:27,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:16:28,107 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:16:28,108 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-27 23:16:28,118 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f7cbbac/4d036f7db7804446899d27a3e2f3b638/FLAG0ba27d5aa [2024-06-27 23:16:28,134 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f7cbbac/4d036f7db7804446899d27a3e2f3b638 [2024-06-27 23:16:28,136 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:16:28,137 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:16:28,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix011.opt.yml/witness.yml [2024-06-27 23:16:28,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:16:28,204 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:16:28,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:16:28,205 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:16:28,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:16:28,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:16:28" (1/2) ... [2024-06-27 23:16:28,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c28802e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:16:28, skipping insertion in model container [2024-06-27 23:16:28,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:16:28" (1/2) ... [2024-06-27 23:16:28,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c474608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:16:28, skipping insertion in model container [2024-06-27 23:16:28,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:16:28" (2/2) ... [2024-06-27 23:16:28,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c28802e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28, skipping insertion in model container [2024-06-27 23:16:28,215 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:16:28" (2/2) ... [2024-06-27 23:16:28,216 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:16:28,239 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:16:28,240 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) [2024-06-27 23:16:28,240 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) [2024-06-27 23:16:28,241 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) [2024-06-27 23:16:28,241 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:16:28,241 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-27 23:16:28,283 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:16:28,553 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:16:28,562 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:16:28,689 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:16:28,738 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:16:28,739 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28 WrapperNode [2024-06-27 23:16:28,739 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:16:28,740 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:16:28,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:16:28,741 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:16:28,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,763 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,800 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-27 23:16:28,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:16:28,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:16:28,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:16:28,801 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:16:28,810 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,813 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,828 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:16:28,829 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,829 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,836 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,841 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:16:28,845 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:16:28,845 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:16:28,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:16:28,846 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (1/1) ... [2024-06-27 23:16:28,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:16:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:16:28,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:16:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:16:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:16:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:16:28,910 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:16:28,910 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:16:28,911 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:16:28,911 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:16:28,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:16:28,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:16:28,912 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:16:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:16:29,016 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:16:29,019 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:16:29,354 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:16:29,354 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:16:29,498 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:16:29,498 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:16:29,498 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:16:29 BoogieIcfgContainer [2024-06-27 23:16:29,498 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:16:29,500 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:16:29,500 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:16:29,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:16:29,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:16:28" (1/4) ... [2024-06-27 23:16:29,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f23e366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:16:29, skipping insertion in model container [2024-06-27 23:16:29,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:16:28" (2/4) ... [2024-06-27 23:16:29,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f23e366 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:16:29, skipping insertion in model container [2024-06-27 23:16:29,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:16:28" (3/4) ... [2024-06-27 23:16:29,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f23e366 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:16:29, skipping insertion in model container [2024-06-27 23:16:29,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:16:29" (4/4) ... [2024-06-27 23:16:29,504 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-06-27 23:16:29,516 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:16:29,517 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:16:29,517 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:16:29,568 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:16:29,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 23:16:29,636 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 23:16:29,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:16:29,639 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. [2024-06-27 23:16:29,640 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 23:16:29,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 23:16:29,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:16:29,668 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;@bb53002, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:16:29,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:16:29,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:16:29,675 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:16:29,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:16:29,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:29,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:16:29,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:29,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 401253807, now seen corresponding path program 1 times [2024-06-27 23:16:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588632194] [2024-06-27 23:16:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:29,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:31,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:31,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588632194] [2024-06-27 23:16:31,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588632194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:31,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:31,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:16:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763698884] [2024-06-27 23:16:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:16:31,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:16:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:16:31,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 23:16:31,098 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) [2024-06-27 23:16:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 23:16:31,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:31,467 INFO L124 PetriNetUnfolderBase]: 1359/2149 cut-off events. [2024-06-27 23:16:31,467 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 23:16:31,472 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. [2024-06-27 23:16:31,481 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 23:16:31,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 23:16:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:16:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:16:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 23:16:31,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-27 23:16:31,492 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-27 23:16:31,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 23:16:31,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:31,496 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 23:16:31,497 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} [2024-06-27 23:16:31,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 23:16:31,500 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 23:16:31,500 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) [2024-06-27 23:16:31,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:31,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:31,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:16:31,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:31,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:31,501 INFO L85 PathProgramCache]: Analyzing trace with hash -942118130, now seen corresponding path program 1 times [2024-06-27 23:16:31,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:31,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727894308] [2024-06-27 23:16:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:31,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:32,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:32,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727894308] [2024-06-27 23:16:32,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727894308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:32,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:32,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:16:32,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107526076] [2024-06-27 23:16:32,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:16:32,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:32,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:16:32,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:16:32,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:16:32,643 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) [2024-06-27 23:16:32,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:32,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:16:32,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:32,936 INFO L124 PetriNetUnfolderBase]: 1560/2392 cut-off events. [2024-06-27 23:16:32,937 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-06-27 23:16:32,939 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. [2024-06-27 23:16:32,947 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 23:16:32,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-27 23:16:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:16:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:16:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 23:16:32,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-27 23:16:32,949 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-27 23:16:32,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-27 23:16:32,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:16:32,953 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 23:16:32,954 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} [2024-06-27 23:16:32,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 23:16:32,954 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 23:16:32,955 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) [2024-06-27 23:16:32,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:32,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:32,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:16:32,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:32,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 859110040, now seen corresponding path program 1 times [2024-06-27 23:16:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:32,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935967241] [2024-06-27 23:16:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:34,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935967241] [2024-06-27 23:16:34,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935967241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:34,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:34,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:16:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733229303] [2024-06-27 23:16:34,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:16:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:16:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:16:34,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:16:34,363 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) [2024-06-27 23:16:34,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:34,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:16:34,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:34,711 INFO L124 PetriNetUnfolderBase]: 1568/2407 cut-off events. [2024-06-27 23:16:34,711 INFO L125 PetriNetUnfolderBase]: For 1340/1340 co-relation queries the response was YES. [2024-06-27 23:16:34,714 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. [2024-06-27 23:16:34,721 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-27 23:16:34,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2024-06-27 23:16:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:16:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:16:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 23:16:34,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-27 23:16:34,723 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 133 transitions. [2024-06-27 23:16:34,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2024-06-27 23:16:34,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:16:34,725 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-27 23:16:34,726 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} [2024-06-27 23:16:34,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-27 23:16:34,726 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-27 23:16:34,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:34,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:34,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:34,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:16:34,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:34,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1607346961, now seen corresponding path program 1 times [2024-06-27 23:16:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:34,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197001018] [2024-06-27 23:16:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:34,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:36,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197001018] [2024-06-27 23:16:36,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197001018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:36,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:36,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869442213] [2024-06-27 23:16:36,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:36,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:36,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:16:36,290 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) [2024-06-27 23:16:36,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:36,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:16:36,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:36,704 INFO L124 PetriNetUnfolderBase]: 1580/2427 cut-off events. [2024-06-27 23:16:36,704 INFO L125 PetriNetUnfolderBase]: For 3188/3188 co-relation queries the response was YES. [2024-06-27 23:16:36,707 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. [2024-06-27 23:16:36,715 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 23:16:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 501 flow [2024-06-27 23:16:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 23:16:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-27 23:16:36,717 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 153 transitions. [2024-06-27 23:16:36,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 501 flow [2024-06-27 23:16:36,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 493 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 23:16:36,720 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-27 23:16:36,720 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} [2024-06-27 23:16:36,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-27 23:16:36,721 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-27 23:16:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:36,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:36,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:16:36,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:36,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash 503880689, now seen corresponding path program 1 times [2024-06-27 23:16:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:36,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464897368] [2024-06-27 23:16:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464897368] [2024-06-27 23:16:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464897368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:37,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:37,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:16:37,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452525492] [2024-06-27 23:16:37,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:37,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:16:37,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:16:37,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:16:37,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:16:37,653 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) [2024-06-27 23:16:37,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:37,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:16:37,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:38,141 INFO L124 PetriNetUnfolderBase]: 1368/2191 cut-off events. [2024-06-27 23:16:38,141 INFO L125 PetriNetUnfolderBase]: For 4119/4119 co-relation queries the response was YES. [2024-06-27 23:16:38,145 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. [2024-06-27 23:16:38,154 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 23:16:38,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 451 flow [2024-06-27 23:16:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:16:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:16:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 23:16:38,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-27 23:16:38,156 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 106 transitions. [2024-06-27 23:16:38,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 451 flow [2024-06-27 23:16:38,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:16:38,164 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 292 flow [2024-06-27 23:16:38,164 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} [2024-06-27 23:16:38,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-27 23:16:38,166 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 292 flow [2024-06-27 23:16:38,167 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) [2024-06-27 23:16:38,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:38,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:38,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:16:38,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:38,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1026778578, now seen corresponding path program 1 times [2024-06-27 23:16:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:38,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782319388] [2024-06-27 23:16:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:39,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:39,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782319388] [2024-06-27 23:16:39,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782319388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:39,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:39,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:39,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052772836] [2024-06-27 23:16:39,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:39,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:39,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:39,348 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) [2024-06-27 23:16:39,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:39,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:39,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:39,941 INFO L124 PetriNetUnfolderBase]: 1651/2537 cut-off events. [2024-06-27 23:16:39,941 INFO L125 PetriNetUnfolderBase]: For 6004/6004 co-relation queries the response was YES. [2024-06-27 23:16:39,946 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. [2024-06-27 23:16:39,959 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 56 selfloop transitions, 29 changer transitions 0/91 dead transitions. [2024-06-27 23:16:39,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 660 flow [2024-06-27 23:16:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 23:16:39,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155038759689923 [2024-06-27 23:16:39,961 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 292 flow. Second operand 6 states and 133 transitions. [2024-06-27 23:16:39,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 660 flow [2024-06-27 23:16:39,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 641 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:39,967 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 452 flow [2024-06-27 23:16:39,967 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} [2024-06-27 23:16:39,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-27 23:16:39,970 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 452 flow [2024-06-27 23:16:39,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:39,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:39,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:39,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:16:39,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:39,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1101942896, now seen corresponding path program 2 times [2024-06-27 23:16:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:39,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301965001] [2024-06-27 23:16:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:39,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:41,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:41,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301965001] [2024-06-27 23:16:41,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301965001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:41,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:41,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:41,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561068747] [2024-06-27 23:16:41,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:41,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:41,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:41,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:41,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:41,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:41,221 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) [2024-06-27 23:16:41,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:41,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:41,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:41,839 INFO L124 PetriNetUnfolderBase]: 1643/2527 cut-off events. [2024-06-27 23:16:41,839 INFO L125 PetriNetUnfolderBase]: For 7476/7478 co-relation queries the response was YES. [2024-06-27 23:16:41,844 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. [2024-06-27 23:16:41,857 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 48 selfloop transitions, 33 changer transitions 0/87 dead transitions. [2024-06-27 23:16:41,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 696 flow [2024-06-27 23:16:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:16:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:16:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 23:16:41,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:16:41,859 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 452 flow. Second operand 6 states and 129 transitions. [2024-06-27 23:16:41,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 696 flow [2024-06-27 23:16:41,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 667 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 23:16:41,864 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 509 flow [2024-06-27 23:16:41,865 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} [2024-06-27 23:16:41,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-27 23:16:41,866 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 509 flow [2024-06-27 23:16:41,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:41,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:41,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:16:41,867 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash -765710802, now seen corresponding path program 3 times [2024-06-27 23:16:41,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:41,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365236161] [2024-06-27 23:16:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:41,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:42,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365236161] [2024-06-27 23:16:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365236161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:42,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:42,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:16:42,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229198035] [2024-06-27 23:16:42,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:42,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:16:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:16:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:16:42,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:42,770 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) [2024-06-27 23:16:42,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:42,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:42,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:43,388 INFO L124 PetriNetUnfolderBase]: 1682/2589 cut-off events. [2024-06-27 23:16:43,388 INFO L125 PetriNetUnfolderBase]: For 9731/9733 co-relation queries the response was YES. [2024-06-27 23:16:43,395 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. [2024-06-27 23:16:43,403 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 58 selfloop transitions, 45 changer transitions 0/109 dead transitions. [2024-06-27 23:16:43,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 958 flow [2024-06-27 23:16:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:16:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:16:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 23:16:43,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 23:16:43,405 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 509 flow. Second operand 7 states and 147 transitions. [2024-06-27 23:16:43,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 958 flow [2024-06-27 23:16:43,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 897 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 23:16:43,412 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 756 flow [2024-06-27 23:16:43,412 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} [2024-06-27 23:16:43,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 23:16:43,414 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 756 flow [2024-06-27 23:16:43,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:43,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:43,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:16:43,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:43,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1101934960, now seen corresponding path program 1 times [2024-06-27 23:16:43,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:43,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369226877] [2024-06-27 23:16:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:44,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:44,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369226877] [2024-06-27 23:16:44,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369226877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:44,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:16:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815238332] [2024-06-27 23:16:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:44,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:16:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:16:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:16:44,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:16:44,805 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) [2024-06-27 23:16:44,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:44,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:16:44,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:45,462 INFO L124 PetriNetUnfolderBase]: 1807/2850 cut-off events. [2024-06-27 23:16:45,463 INFO L125 PetriNetUnfolderBase]: For 12857/12859 co-relation queries the response was YES. [2024-06-27 23:16:45,470 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. [2024-06-27 23:16:45,480 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 89 selfloop transitions, 16 changer transitions 0/111 dead transitions. [2024-06-27 23:16:45,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 1068 flow [2024-06-27 23:16:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:16:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:16:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:16:45,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 23:16:45,482 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 756 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:16:45,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 1068 flow [2024-06-27 23:16:45,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 1027 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:45,492 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 815 flow [2024-06-27 23:16:45,492 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} [2024-06-27 23:16:45,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 23:16:45,493 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 815 flow [2024-06-27 23:16:45,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:45,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:45,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:45,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:16:45,494 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)] === [2024-06-27 23:16:45,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash 376619089, now seen corresponding path program 1 times [2024-06-27 23:16:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:45,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622891776] [2024-06-27 23:16:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:45,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:46,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:46,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622891776] [2024-06-27 23:16:46,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622891776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:46,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:46,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:16:46,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589448928] [2024-06-27 23:16:46,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:46,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:16:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:16:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:16:46,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:16:46,401 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) [2024-06-27 23:16:46,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:46,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:16:46,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:46,761 INFO L124 PetriNetUnfolderBase]: 1676/2681 cut-off events. [2024-06-27 23:16:46,761 INFO L125 PetriNetUnfolderBase]: For 14330/14351 co-relation queries the response was YES. [2024-06-27 23:16:46,768 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. [2024-06-27 23:16:46,778 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 84 selfloop transitions, 10 changer transitions 0/102 dead transitions. [2024-06-27 23:16:46,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 102 transitions, 1043 flow [2024-06-27 23:16:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:16:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:16:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-27 23:16:46,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 23:16:46,780 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 815 flow. Second operand 5 states and 102 transitions. [2024-06-27 23:16:46,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 102 transitions, 1043 flow [2024-06-27 23:16:46,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 1004 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:46,793 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 828 flow [2024-06-27 23:16:46,793 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} [2024-06-27 23:16:46,794 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 23:16:46,794 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 828 flow [2024-06-27 23:16:46,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:46,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:46,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:46,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:16:46,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:46,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1517484535, now seen corresponding path program 1 times [2024-06-27 23:16:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:46,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323381534] [2024-06-27 23:16:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:46,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:48,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:48,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323381534] [2024-06-27 23:16:48,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323381534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:48,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:48,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:16:48,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655308315] [2024-06-27 23:16:48,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:48,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:16:48,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:16:48,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:16:48,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:48,435 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) [2024-06-27 23:16:48,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:48,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:48,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:49,334 INFO L124 PetriNetUnfolderBase]: 2156/3262 cut-off events. [2024-06-27 23:16:49,335 INFO L125 PetriNetUnfolderBase]: For 20595/20600 co-relation queries the response was YES. [2024-06-27 23:16:49,342 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. [2024-06-27 23:16:49,353 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 84 selfloop transitions, 61 changer transitions 0/150 dead transitions. [2024-06-27 23:16:49,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 150 transitions, 1478 flow [2024-06-27 23:16:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 23:16:49,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49709302325581395 [2024-06-27 23:16:49,355 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 828 flow. Second operand 8 states and 171 transitions. [2024-06-27 23:16:49,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 150 transitions, 1478 flow [2024-06-27 23:16:49,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 150 transitions, 1448 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:49,368 INFO L231 Difference]: Finished difference. Result has 87 places, 114 transitions, 1116 flow [2024-06-27 23:16:49,368 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} [2024-06-27 23:16:49,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 23:16:49,369 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 114 transitions, 1116 flow [2024-06-27 23:16:49,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:49,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:49,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:16:49,370 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:49,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1889826415, now seen corresponding path program 2 times [2024-06-27 23:16:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:49,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886581840] [2024-06-27 23:16:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:49,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:50,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:50,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886581840] [2024-06-27 23:16:50,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886581840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:50,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:50,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:16:50,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609206396] [2024-06-27 23:16:50,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:50,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:16:50,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:16:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:16:51,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:51,017 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) [2024-06-27 23:16:51,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:51,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:51,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:51,904 INFO L124 PetriNetUnfolderBase]: 2228/3377 cut-off events. [2024-06-27 23:16:51,905 INFO L125 PetriNetUnfolderBase]: For 25991/25993 co-relation queries the response was YES. [2024-06-27 23:16:51,913 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. [2024-06-27 23:16:51,925 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 85 selfloop transitions, 77 changer transitions 0/167 dead transitions. [2024-06-27 23:16:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 167 transitions, 1841 flow [2024-06-27 23:16:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 23:16:51,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:16:51,927 INFO L175 Difference]: Start difference. First operand has 87 places, 114 transitions, 1116 flow. Second operand 8 states and 172 transitions. [2024-06-27 23:16:51,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 167 transitions, 1841 flow [2024-06-27 23:16:51,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 167 transitions, 1767 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 23:16:51,952 INFO L231 Difference]: Finished difference. Result has 94 places, 130 transitions, 1386 flow [2024-06-27 23:16:51,952 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} [2024-06-27 23:16:51,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-27 23:16:51,953 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 130 transitions, 1386 flow [2024-06-27 23:16:51,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:51,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:51,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:16:51,954 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:51,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 342956655, now seen corresponding path program 3 times [2024-06-27 23:16:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:51,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015326741] [2024-06-27 23:16:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015326741] [2024-06-27 23:16:53,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015326741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:53,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:53,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:16:53,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034881607] [2024-06-27 23:16:53,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:53,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:16:53,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:53,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:16:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:16:53,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:53,562 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) [2024-06-27 23:16:53,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:53,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:53,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:54,573 INFO L124 PetriNetUnfolderBase]: 2250/3410 cut-off events. [2024-06-27 23:16:54,573 INFO L125 PetriNetUnfolderBase]: For 30911/30913 co-relation queries the response was YES. [2024-06-27 23:16:54,582 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. [2024-06-27 23:16:54,594 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 84 selfloop transitions, 88 changer transitions 0/177 dead transitions. [2024-06-27 23:16:54,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 177 transitions, 2118 flow [2024-06-27 23:16:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 23:16:54,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:16:54,596 INFO L175 Difference]: Start difference. First operand has 94 places, 130 transitions, 1386 flow. Second operand 8 states and 172 transitions. [2024-06-27 23:16:54,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 177 transitions, 2118 flow [2024-06-27 23:16:54,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 177 transitions, 2098 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 23:16:54,631 INFO L231 Difference]: Finished difference. Result has 102 places, 140 transitions, 1711 flow [2024-06-27 23:16:54,631 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} [2024-06-27 23:16:54,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 23:16:54,632 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 140 transitions, 1711 flow [2024-06-27 23:16:54,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:54,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:54,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:54,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:16:54,633 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:54,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash 343223565, now seen corresponding path program 4 times [2024-06-27 23:16:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:54,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311017040] [2024-06-27 23:16:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:54,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:56,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:56,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311017040] [2024-06-27 23:16:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311017040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:56,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:16:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002609438] [2024-06-27 23:16:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:56,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:16:56,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:16:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:16:56,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:56,285 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) [2024-06-27 23:16:56,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:56,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:56,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:57,278 INFO L124 PetriNetUnfolderBase]: 2240/3389 cut-off events. [2024-06-27 23:16:57,279 INFO L125 PetriNetUnfolderBase]: For 35795/35797 co-relation queries the response was YES. [2024-06-27 23:16:57,290 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. [2024-06-27 23:16:57,302 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 74 selfloop transitions, 94 changer transitions 0/173 dead transitions. [2024-06-27 23:16:57,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 173 transitions, 2257 flow [2024-06-27 23:16:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:16:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:16:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 23:16:57,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-27 23:16:57,304 INFO L175 Difference]: Start difference. First operand has 102 places, 140 transitions, 1711 flow. Second operand 8 states and 169 transitions. [2024-06-27 23:16:57,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 173 transitions, 2257 flow [2024-06-27 23:16:57,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 2106 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 23:16:57,343 INFO L231 Difference]: Finished difference. Result has 106 places, 140 transitions, 1762 flow [2024-06-27 23:16:57,343 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} [2024-06-27 23:16:57,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-27 23:16:57,344 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 140 transitions, 1762 flow [2024-06-27 23:16:57,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:57,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:57,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:57,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:16:57,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:16:57,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1408645747, now seen corresponding path program 5 times [2024-06-27 23:16:57,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:57,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137132861] [2024-06-27 23:16:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:57,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:16:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:16:58,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:16:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137132861] [2024-06-27 23:16:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137132861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:16:58,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:16:58,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:16:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371740388] [2024-06-27 23:16:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:16:58,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:16:58,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:16:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:16:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:16:58,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:16:58,663 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) [2024-06-27 23:16:58,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:16:58,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:16:58,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:16:59,585 INFO L124 PetriNetUnfolderBase]: 2338/3557 cut-off events. [2024-06-27 23:16:59,586 INFO L125 PetriNetUnfolderBase]: For 40222/40227 co-relation queries the response was YES. [2024-06-27 23:16:59,598 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. [2024-06-27 23:16:59,611 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 109 selfloop transitions, 94 changer transitions 0/208 dead transitions. [2024-06-27 23:16:59,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 208 transitions, 2759 flow [2024-06-27 23:16:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:16:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:16:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:16:59,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-27 23:16:59,614 INFO L175 Difference]: Start difference. First operand has 106 places, 140 transitions, 1762 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:16:59,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 208 transitions, 2759 flow [2024-06-27 23:16:59,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 208 transitions, 2489 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 23:16:59,655 INFO L231 Difference]: Finished difference. Result has 112 places, 158 transitions, 1982 flow [2024-06-27 23:16:59,655 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} [2024-06-27 23:16:59,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 23:16:59,656 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 158 transitions, 1982 flow [2024-06-27 23:16:59,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:16:59,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:16:59,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:16:59,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:16:59,656 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)] === [2024-06-27 23:16:59,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:16:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1209709147, now seen corresponding path program 1 times [2024-06-27 23:16:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:16:59,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675200015] [2024-06-27 23:16:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:16:59,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:16:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:01,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675200015] [2024-06-27 23:17:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675200015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:01,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:17:01,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375255655] [2024-06-27 23:17:01,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:01,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:17:01,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:17:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:17:01,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:17:01,208 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) [2024-06-27 23:17:01,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:01,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:17:01,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:01,737 INFO L124 PetriNetUnfolderBase]: 1959/3135 cut-off events. [2024-06-27 23:17:01,737 INFO L125 PetriNetUnfolderBase]: For 38853/38863 co-relation queries the response was YES. [2024-06-27 23:17:01,745 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. [2024-06-27 23:17:01,771 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2024-06-27 23:17:01,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 170 transitions, 2348 flow [2024-06-27 23:17:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:17:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:17:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 23:17:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 23:17:01,773 INFO L175 Difference]: Start difference. First operand has 112 places, 158 transitions, 1982 flow. Second operand 6 states and 119 transitions. [2024-06-27 23:17:01,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 170 transitions, 2348 flow [2024-06-27 23:17:01,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 170 transitions, 2237 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:01,801 INFO L231 Difference]: Finished difference. Result has 114 places, 161 transitions, 1935 flow [2024-06-27 23:17:01,801 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} [2024-06-27 23:17:01,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-27 23:17:01,802 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 161 transitions, 1935 flow [2024-06-27 23:17:01,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:01,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:01,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:01,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:17:01,802 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:01,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1021320565, now seen corresponding path program 1 times [2024-06-27 23:17:01,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:01,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712849436] [2024-06-27 23:17:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:01,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:03,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:03,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712849436] [2024-06-27 23:17:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712849436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:03,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283859441] [2024-06-27 23:17:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:03,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:03,300 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) [2024-06-27 23:17:03,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:03,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:03,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:04,069 INFO L124 PetriNetUnfolderBase]: 2187/3395 cut-off events. [2024-06-27 23:17:04,069 INFO L125 PetriNetUnfolderBase]: For 47106/47112 co-relation queries the response was YES. [2024-06-27 23:17:04,080 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. [2024-06-27 23:17:04,091 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 64 changer transitions 0/184 dead transitions. [2024-06-27 23:17:04,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 2376 flow [2024-06-27 23:17:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:17:04,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 23:17:04,093 INFO L175 Difference]: Start difference. First operand has 114 places, 161 transitions, 1935 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:17:04,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 2376 flow [2024-06-27 23:17:04,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 184 transitions, 2336 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:04,129 INFO L231 Difference]: Finished difference. Result has 118 places, 163 transitions, 2059 flow [2024-06-27 23:17:04,129 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} [2024-06-27 23:17:04,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-27 23:17:04,129 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 163 transitions, 2059 flow [2024-06-27 23:17:04,129 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) [2024-06-27 23:17:04,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:04,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:04,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:17:04,130 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:04,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1024177525, now seen corresponding path program 2 times [2024-06-27 23:17:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:04,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101697381] [2024-06-27 23:17:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:04,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101697381] [2024-06-27 23:17:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101697381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:05,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333239164] [2024-06-27 23:17:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:05,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:05,557 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) [2024-06-27 23:17:05,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:05,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:05,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:06,350 INFO L124 PetriNetUnfolderBase]: 2245/3504 cut-off events. [2024-06-27 23:17:06,350 INFO L125 PetriNetUnfolderBase]: For 52517/52527 co-relation queries the response was YES. [2024-06-27 23:17:06,361 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. [2024-06-27 23:17:06,373 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 61 changer transitions 0/191 dead transitions. [2024-06-27 23:17:06,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 191 transitions, 2531 flow [2024-06-27 23:17:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:17:06,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 23:17:06,375 INFO L175 Difference]: Start difference. First operand has 118 places, 163 transitions, 2059 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:17:06,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 191 transitions, 2531 flow [2024-06-27 23:17:06,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 191 transitions, 2395 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:17:06,417 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 2111 flow [2024-06-27 23:17:06,418 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} [2024-06-27 23:17:06,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-27 23:17:06,418 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 2111 flow [2024-06-27 23:17:06,418 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) [2024-06-27 23:17:06,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:06,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:06,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:17:06,419 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:06,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1887862869, now seen corresponding path program 1 times [2024-06-27 23:17:06,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:06,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155252900] [2024-06-27 23:17:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:06,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155252900] [2024-06-27 23:17:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155252900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:07,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108689816] [2024-06-27 23:17:07,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:07,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:07,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:07,991 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) [2024-06-27 23:17:07,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:07,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:07,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:09,028 INFO L124 PetriNetUnfolderBase]: 2625/4044 cut-off events. [2024-06-27 23:17:09,029 INFO L125 PetriNetUnfolderBase]: For 62589/62594 co-relation queries the response was YES. [2024-06-27 23:17:09,042 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. [2024-06-27 23:17:09,055 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 116 changer transitions 0/239 dead transitions. [2024-06-27 23:17:09,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 239 transitions, 3415 flow [2024-06-27 23:17:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 23:17:09,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145348837209303 [2024-06-27 23:17:09,057 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 2111 flow. Second operand 8 states and 177 transitions. [2024-06-27 23:17:09,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 239 transitions, 3415 flow [2024-06-27 23:17:09,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 239 transitions, 3269 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:09,112 INFO L231 Difference]: Finished difference. Result has 126 places, 197 transitions, 2678 flow [2024-06-27 23:17:09,113 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} [2024-06-27 23:17:09,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 23:17:09,113 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 197 transitions, 2678 flow [2024-06-27 23:17:09,113 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) [2024-06-27 23:17:09,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:09,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:09,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:17:09,114 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:09,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash -906024435, now seen corresponding path program 2 times [2024-06-27 23:17:09,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:09,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222468589] [2024-06-27 23:17:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:10,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222468589] [2024-06-27 23:17:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222468589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016853772] [2024-06-27 23:17:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:10,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:10,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:10,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:10,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:10,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:10,721 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) [2024-06-27 23:17:10,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:10,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:10,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:11,759 INFO L124 PetriNetUnfolderBase]: 2609/4026 cut-off events. [2024-06-27 23:17:11,760 INFO L125 PetriNetUnfolderBase]: For 68757/68764 co-relation queries the response was YES. [2024-06-27 23:17:11,772 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. [2024-06-27 23:17:11,783 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 107 selfloop transitions, 122 changer transitions 0/234 dead transitions. [2024-06-27 23:17:11,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 234 transitions, 3432 flow [2024-06-27 23:17:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 23:17:11,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502906976744186 [2024-06-27 23:17:11,785 INFO L175 Difference]: Start difference. First operand has 126 places, 197 transitions, 2678 flow. Second operand 8 states and 173 transitions. [2024-06-27 23:17:11,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 234 transitions, 3432 flow [2024-06-27 23:17:11,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 234 transitions, 3259 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:11,841 INFO L231 Difference]: Finished difference. Result has 133 places, 200 transitions, 2869 flow [2024-06-27 23:17:11,842 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} [2024-06-27 23:17:11,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-27 23:17:11,842 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 200 transitions, 2869 flow [2024-06-27 23:17:11,842 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) [2024-06-27 23:17:11,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:11,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:11,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:17:11,843 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:11,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1887869379, now seen corresponding path program 3 times [2024-06-27 23:17:11,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:11,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778466170] [2024-06-27 23:17:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:11,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:13,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778466170] [2024-06-27 23:17:13,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778466170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:13,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:13,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:13,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814257877] [2024-06-27 23:17:13,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:13,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:13,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:13,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:13,352 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) [2024-06-27 23:17:13,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:13,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:13,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:14,313 INFO L124 PetriNetUnfolderBase]: 2593/4000 cut-off events. [2024-06-27 23:17:14,313 INFO L125 PetriNetUnfolderBase]: For 74330/74335 co-relation queries the response was YES. [2024-06-27 23:17:14,327 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. [2024-06-27 23:17:14,340 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 107 selfloop transitions, 120 changer transitions 0/232 dead transitions. [2024-06-27 23:17:14,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 232 transitions, 3583 flow [2024-06-27 23:17:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 23:17:14,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49709302325581395 [2024-06-27 23:17:14,342 INFO L175 Difference]: Start difference. First operand has 133 places, 200 transitions, 2869 flow. Second operand 8 states and 171 transitions. [2024-06-27 23:17:14,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 232 transitions, 3583 flow [2024-06-27 23:17:14,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 232 transitions, 3434 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:14,414 INFO L231 Difference]: Finished difference. Result has 138 places, 200 transitions, 2975 flow [2024-06-27 23:17:14,414 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} [2024-06-27 23:17:14,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 23:17:14,415 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 200 transitions, 2975 flow [2024-06-27 23:17:14,415 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) [2024-06-27 23:17:14,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:14,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:14,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:17:14,415 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)] === [2024-06-27 23:17:14,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1140374768, now seen corresponding path program 1 times [2024-06-27 23:17:14,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:14,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860872710] [2024-06-27 23:17:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:14,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:15,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:15,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860872710] [2024-06-27 23:17:15,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860872710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:15,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:15,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:17:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125224498] [2024-06-27 23:17:15,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:15,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:17:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:17:15,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:17:15,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:15,369 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) [2024-06-27 23:17:15,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:15,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:15,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:15,999 INFO L124 PetriNetUnfolderBase]: 2382/3755 cut-off events. [2024-06-27 23:17:15,999 INFO L125 PetriNetUnfolderBase]: For 81129/81143 co-relation queries the response was YES. [2024-06-27 23:17:16,016 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. [2024-06-27 23:17:16,031 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 186 selfloop transitions, 19 changer transitions 0/217 dead transitions. [2024-06-27 23:17:16,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 217 transitions, 3479 flow [2024-06-27 23:17:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:17:16,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 23:17:16,032 INFO L175 Difference]: Start difference. First operand has 138 places, 200 transitions, 2975 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:17:16,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 217 transitions, 3479 flow [2024-06-27 23:17:16,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 217 transitions, 3286 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:16,107 INFO L231 Difference]: Finished difference. Result has 142 places, 205 transitions, 2892 flow [2024-06-27 23:17:16,108 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} [2024-06-27 23:17:16,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 23:17:16,108 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 205 transitions, 2892 flow [2024-06-27 23:17:16,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:16,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:16,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:17:16,109 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:16,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:16,109 INFO L85 PathProgramCache]: Analyzing trace with hash 169202445, now seen corresponding path program 4 times [2024-06-27 23:17:16,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:16,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391616247] [2024-06-27 23:17:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:16,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:17,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:17,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391616247] [2024-06-27 23:17:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391616247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:17,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:17,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69590388] [2024-06-27 23:17:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:17,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:17,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:17,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:17,548 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) [2024-06-27 23:17:17,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:17,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:17,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:18,571 INFO L124 PetriNetUnfolderBase]: 2634/4071 cut-off events. [2024-06-27 23:17:18,571 INFO L125 PetriNetUnfolderBase]: For 86896/86899 co-relation queries the response was YES. [2024-06-27 23:17:18,585 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. [2024-06-27 23:17:18,599 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 119 selfloop transitions, 127 changer transitions 0/251 dead transitions. [2024-06-27 23:17:18,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 251 transitions, 3877 flow [2024-06-27 23:17:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 23:17:18,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-27 23:17:18,601 INFO L175 Difference]: Start difference. First operand has 142 places, 205 transitions, 2892 flow. Second operand 8 states and 167 transitions. [2024-06-27 23:17:18,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 251 transitions, 3877 flow [2024-06-27 23:17:18,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 251 transitions, 3776 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:18,679 INFO L231 Difference]: Finished difference. Result has 148 places, 218 transitions, 3303 flow [2024-06-27 23:17:18,679 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} [2024-06-27 23:17:18,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-27 23:17:18,680 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 218 transitions, 3303 flow [2024-06-27 23:17:18,680 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) [2024-06-27 23:17:18,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:18,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:18,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:17:18,680 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:18,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1317021461, now seen corresponding path program 5 times [2024-06-27 23:17:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:18,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914935128] [2024-06-27 23:17:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:20,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:20,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914935128] [2024-06-27 23:17:20,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914935128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:20,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:20,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:20,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052968309] [2024-06-27 23:17:20,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:20,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:20,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:20,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:20,365 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) [2024-06-27 23:17:20,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:20,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:20,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:21,355 INFO L124 PetriNetUnfolderBase]: 2670/4133 cut-off events. [2024-06-27 23:17:21,355 INFO L125 PetriNetUnfolderBase]: For 97122/97125 co-relation queries the response was YES. [2024-06-27 23:17:21,374 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. [2024-06-27 23:17:21,389 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 133 changer transitions 0/256 dead transitions. [2024-06-27 23:17:21,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 256 transitions, 4189 flow [2024-06-27 23:17:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:17:21,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 23:17:21,391 INFO L175 Difference]: Start difference. First operand has 148 places, 218 transitions, 3303 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:17:21,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 256 transitions, 4189 flow [2024-06-27 23:17:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 256 transitions, 3999 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:21,495 INFO L231 Difference]: Finished difference. Result has 151 places, 224 transitions, 3495 flow [2024-06-27 23:17:21,495 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} [2024-06-27 23:17:21,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-27 23:17:21,495 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 224 transitions, 3495 flow [2024-06-27 23:17:21,496 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) [2024-06-27 23:17:21,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:21,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:21,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:17:21,496 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:21,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1308747251, now seen corresponding path program 6 times [2024-06-27 23:17:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:21,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182434762] [2024-06-27 23:17:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:22,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182434762] [2024-06-27 23:17:22,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182434762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:22,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:22,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122284241] [2024-06-27 23:17:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:22,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:23,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:23,008 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) [2024-06-27 23:17:23,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:23,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:24,035 INFO L124 PetriNetUnfolderBase]: 2654/4111 cut-off events. [2024-06-27 23:17:24,035 INFO L125 PetriNetUnfolderBase]: For 103305/103308 co-relation queries the response was YES. [2024-06-27 23:17:24,048 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. [2024-06-27 23:17:24,064 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 103 selfloop transitions, 144 changer transitions 0/252 dead transitions. [2024-06-27 23:17:24,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 252 transitions, 4170 flow [2024-06-27 23:17:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:17:24,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-27 23:17:24,065 INFO L175 Difference]: Start difference. First operand has 151 places, 224 transitions, 3495 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:17:24,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 252 transitions, 4170 flow [2024-06-27 23:17:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 252 transitions, 3890 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:24,164 INFO L231 Difference]: Finished difference. Result has 155 places, 224 transitions, 3516 flow [2024-06-27 23:17:24,165 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} [2024-06-27 23:17:24,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 23:17:24,166 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 224 transitions, 3516 flow [2024-06-27 23:17:24,166 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) [2024-06-27 23:17:24,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:24,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:24,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:17:24,166 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)] === [2024-06-27 23:17:24,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:24,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1153707248, now seen corresponding path program 2 times [2024-06-27 23:17:24,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:24,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200523553] [2024-06-27 23:17:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:24,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:25,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:25,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200523553] [2024-06-27 23:17:25,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200523553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:25,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:25,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:17:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785285300] [2024-06-27 23:17:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:25,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:17:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:25,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:17:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:17:25,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:25,112 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) [2024-06-27 23:17:25,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:25,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:25,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:25,703 INFO L124 PetriNetUnfolderBase]: 2454/3899 cut-off events. [2024-06-27 23:17:25,703 INFO L125 PetriNetUnfolderBase]: For 106766/106783 co-relation queries the response was YES. [2024-06-27 23:17:25,720 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. [2024-06-27 23:17:25,735 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 200 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2024-06-27 23:17:25,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 240 transitions, 4117 flow [2024-06-27 23:17:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:17:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:17:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 23:17:25,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:17:25,737 INFO L175 Difference]: Start difference. First operand has 155 places, 224 transitions, 3516 flow. Second operand 6 states and 117 transitions. [2024-06-27 23:17:25,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 240 transitions, 4117 flow [2024-06-27 23:17:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 240 transitions, 3934 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:25,860 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 3463 flow [2024-06-27 23:17:25,860 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} [2024-06-27 23:17:25,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-27 23:17:25,861 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 3463 flow [2024-06-27 23:17:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:25,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:25,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:25,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:17:25,861 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:25,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1848750683, now seen corresponding path program 3 times [2024-06-27 23:17:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541437289] [2024-06-27 23:17:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541437289] [2024-06-27 23:17:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541437289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:26,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:26,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963755246] [2024-06-27 23:17:26,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:26,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:26,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:26,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:27,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:27,003 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) [2024-06-27 23:17:27,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:27,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:27,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:27,741 INFO L124 PetriNetUnfolderBase]: 2580/4092 cut-off events. [2024-06-27 23:17:27,741 INFO L125 PetriNetUnfolderBase]: For 117055/117067 co-relation queries the response was YES. [2024-06-27 23:17:27,759 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. [2024-06-27 23:17:27,775 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 177 selfloop transitions, 88 changer transitions 0/278 dead transitions. [2024-06-27 23:17:27,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 278 transitions, 4380 flow [2024-06-27 23:17:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:17:27,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 23:17:27,777 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 3463 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:17:27,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 278 transitions, 4380 flow [2024-06-27 23:17:27,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 278 transitions, 4333 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 23:17:27,903 INFO L231 Difference]: Finished difference. Result has 164 places, 243 transitions, 3755 flow [2024-06-27 23:17:27,903 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} [2024-06-27 23:17:27,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-27 23:17:27,904 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 243 transitions, 3755 flow [2024-06-27 23:17:27,904 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) [2024-06-27 23:17:27,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:27,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:27,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:17:27,904 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:27,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1435320793, now seen corresponding path program 4 times [2024-06-27 23:17:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587019444] [2024-06-27 23:17:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:29,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587019444] [2024-06-27 23:17:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587019444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:29,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:29,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:29,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431096800] [2024-06-27 23:17:29,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:29,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:29,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:29,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:29,186 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) [2024-06-27 23:17:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:29,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:29,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:30,091 INFO L124 PetriNetUnfolderBase]: 2594/4117 cut-off events. [2024-06-27 23:17:30,091 INFO L125 PetriNetUnfolderBase]: For 125808/125820 co-relation queries the response was YES. [2024-06-27 23:17:30,111 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. [2024-06-27 23:17:30,128 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 177 selfloop transitions, 86 changer transitions 0/276 dead transitions. [2024-06-27 23:17:30,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 276 transitions, 4471 flow [2024-06-27 23:17:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 23:17:30,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-27 23:17:30,130 INFO L175 Difference]: Start difference. First operand has 164 places, 243 transitions, 3755 flow. Second operand 8 states and 165 transitions. [2024-06-27 23:17:30,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 276 transitions, 4471 flow [2024-06-27 23:17:30,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 276 transitions, 4383 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:30,396 INFO L231 Difference]: Finished difference. Result has 169 places, 245 transitions, 3873 flow [2024-06-27 23:17:30,396 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} [2024-06-27 23:17:30,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-27 23:17:30,401 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 245 transitions, 3873 flow [2024-06-27 23:17:30,401 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) [2024-06-27 23:17:30,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:30,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:30,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:17:30,402 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:30,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash -377383607, now seen corresponding path program 5 times [2024-06-27 23:17:30,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:30,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347294470] [2024-06-27 23:17:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:30,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:31,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347294470] [2024-06-27 23:17:31,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347294470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:31,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:31,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:17:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333270416] [2024-06-27 23:17:31,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:31,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:17:31,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:17:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:17:31,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 23:17:31,336 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) [2024-06-27 23:17:31,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:31,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 23:17:31,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:32,140 INFO L124 PetriNetUnfolderBase]: 2207/3774 cut-off events. [2024-06-27 23:17:32,140 INFO L125 PetriNetUnfolderBase]: For 128005/128076 co-relation queries the response was YES. [2024-06-27 23:17:32,158 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. [2024-06-27 23:17:32,173 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 100 changer transitions 0/284 dead transitions. [2024-06-27 23:17:32,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 284 transitions, 4547 flow [2024-06-27 23:17:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:32,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 23:17:32,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382059800664452 [2024-06-27 23:17:32,174 INFO L175 Difference]: Start difference. First operand has 169 places, 245 transitions, 3873 flow. Second operand 7 states and 162 transitions. [2024-06-27 23:17:32,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 284 transitions, 4547 flow [2024-06-27 23:17:32,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 284 transitions, 4418 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:32,320 INFO L231 Difference]: Finished difference. Result has 173 places, 257 transitions, 4169 flow [2024-06-27 23:17:32,320 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} [2024-06-27 23:17:32,321 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-27 23:17:32,321 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 257 transitions, 4169 flow [2024-06-27 23:17:32,321 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) [2024-06-27 23:17:32,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:32,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:32,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:17:32,321 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:32,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash 800528759, now seen corresponding path program 7 times [2024-06-27 23:17:32,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:32,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338836105] [2024-06-27 23:17:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:32,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:33,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338836105] [2024-06-27 23:17:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338836105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285754501] [2024-06-27 23:17:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:33,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:33,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:33,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:33,624 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) [2024-06-27 23:17:33,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:33,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:33,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:34,761 INFO L124 PetriNetUnfolderBase]: 3091/4837 cut-off events. [2024-06-27 23:17:34,761 INFO L125 PetriNetUnfolderBase]: For 146767/146772 co-relation queries the response was YES. [2024-06-27 23:17:34,786 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. [2024-06-27 23:17:34,805 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 160 selfloop transitions, 181 changer transitions 0/346 dead transitions. [2024-06-27 23:17:34,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 346 transitions, 6001 flow [2024-06-27 23:17:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:17:34,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-27 23:17:34,806 INFO L175 Difference]: Start difference. First operand has 173 places, 257 transitions, 4169 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:17:34,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 346 transitions, 6001 flow [2024-06-27 23:17:35,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 346 transitions, 5880 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 23:17:35,017 INFO L231 Difference]: Finished difference. Result has 182 places, 305 transitions, 5433 flow [2024-06-27 23:17:35,018 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} [2024-06-27 23:17:35,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-27 23:17:35,018 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 305 transitions, 5433 flow [2024-06-27 23:17:35,019 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) [2024-06-27 23:17:35,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:35,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:35,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:17:35,019 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:35,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:35,019 INFO L85 PathProgramCache]: Analyzing trace with hash 765846269, now seen corresponding path program 8 times [2024-06-27 23:17:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:35,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438051429] [2024-06-27 23:17:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:35,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:36,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:36,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438051429] [2024-06-27 23:17:36,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438051429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:36,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:36,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:36,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365456658] [2024-06-27 23:17:36,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:36,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:36,443 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) [2024-06-27 23:17:36,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:36,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:36,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:37,711 INFO L124 PetriNetUnfolderBase]: 3232/5068 cut-off events. [2024-06-27 23:17:37,711 INFO L125 PetriNetUnfolderBase]: For 166275/166278 co-relation queries the response was YES. [2024-06-27 23:17:37,736 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. [2024-06-27 23:17:37,756 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 172 selfloop transitions, 199 changer transitions 0/376 dead transitions. [2024-06-27 23:17:37,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 376 transitions, 7098 flow [2024-06-27 23:17:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:17:37,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-27 23:17:37,758 INFO L175 Difference]: Start difference. First operand has 182 places, 305 transitions, 5433 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:17:37,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 376 transitions, 7098 flow [2024-06-27 23:17:38,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 376 transitions, 6791 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 23:17:38,037 INFO L231 Difference]: Finished difference. Result has 188 places, 337 transitions, 6347 flow [2024-06-27 23:17:38,037 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} [2024-06-27 23:17:38,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 23:17:38,038 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 337 transitions, 6347 flow [2024-06-27 23:17:38,038 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) [2024-06-27 23:17:38,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:38,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:38,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:17:38,038 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:38,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:38,040 INFO L85 PathProgramCache]: Analyzing trace with hash 765852779, now seen corresponding path program 9 times [2024-06-27 23:17:38,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:38,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302043484] [2024-06-27 23:17:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:38,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:39,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:39,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302043484] [2024-06-27 23:17:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302043484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:39,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:39,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585977116] [2024-06-27 23:17:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:39,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:39,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:39,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:17:39,371 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) [2024-06-27 23:17:39,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:39,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:17:39,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:40,703 INFO L124 PetriNetUnfolderBase]: 3222/5054 cut-off events. [2024-06-27 23:17:40,704 INFO L125 PetriNetUnfolderBase]: For 162948/162951 co-relation queries the response was YES. [2024-06-27 23:17:40,726 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. [2024-06-27 23:17:40,745 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 166 selfloop transitions, 202 changer transitions 0/373 dead transitions. [2024-06-27 23:17:40,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 373 transitions, 7253 flow [2024-06-27 23:17:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:17:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:17:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:17:40,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-27 23:17:40,749 INFO L175 Difference]: Start difference. First operand has 188 places, 337 transitions, 6347 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:17:40,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 373 transitions, 7253 flow [2024-06-27 23:17:40,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 373 transitions, 6887 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:40,973 INFO L231 Difference]: Finished difference. Result has 194 places, 340 transitions, 6504 flow [2024-06-27 23:17:40,973 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} [2024-06-27 23:17:40,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-27 23:17:40,974 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 340 transitions, 6504 flow [2024-06-27 23:17:40,974 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) [2024-06-27 23:17:40,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:40,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:40,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:17:40,975 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)] === [2024-06-27 23:17:40,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 942716592, now seen corresponding path program 3 times [2024-06-27 23:17:40,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:40,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053882593] [2024-06-27 23:17:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:40,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:41,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:41,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053882593] [2024-06-27 23:17:41,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053882593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:41,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:41,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:17:41,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302422419] [2024-06-27 23:17:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:41,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:17:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:17:41,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:17:41,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:41,859 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) [2024-06-27 23:17:41,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:41,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:41,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:42,733 INFO L124 PetriNetUnfolderBase]: 2942/4735 cut-off events. [2024-06-27 23:17:42,733 INFO L125 PetriNetUnfolderBase]: For 172295/172322 co-relation queries the response was YES. [2024-06-27 23:17:42,760 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. [2024-06-27 23:17:42,781 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 24 changer transitions 0/361 dead transitions. [2024-06-27 23:17:42,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 361 transitions, 7285 flow [2024-06-27 23:17:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 23:17:42,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 23:17:42,782 INFO L175 Difference]: Start difference. First operand has 194 places, 340 transitions, 6504 flow. Second operand 7 states and 137 transitions. [2024-06-27 23:17:42,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 361 transitions, 7285 flow [2024-06-27 23:17:43,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 361 transitions, 7030 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:43,020 INFO L231 Difference]: Finished difference. Result has 198 places, 344 transitions, 6362 flow [2024-06-27 23:17:43,020 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} [2024-06-27 23:17:43,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 23:17:43,021 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 344 transitions, 6362 flow [2024-06-27 23:17:43,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:43,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:43,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:43,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:17:43,021 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)] === [2024-06-27 23:17:43,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:43,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1146094640, now seen corresponding path program 1 times [2024-06-27 23:17:43,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:43,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932318768] [2024-06-27 23:17:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:43,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:43,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:43,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932318768] [2024-06-27 23:17:43,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932318768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:43,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:17:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996016069] [2024-06-27 23:17:43,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:43,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:17:43,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:17:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:17:43,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:17:43,912 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) [2024-06-27 23:17:43,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:43,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:17:43,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:44,702 INFO L124 PetriNetUnfolderBase]: 2723/4487 cut-off events. [2024-06-27 23:17:44,702 INFO L125 PetriNetUnfolderBase]: For 160580/160603 co-relation queries the response was YES. [2024-06-27 23:17:44,726 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. [2024-06-27 23:17:44,744 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 325 selfloop transitions, 15 changer transitions 0/358 dead transitions. [2024-06-27 23:17:44,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 358 transitions, 7112 flow [2024-06-27 23:17:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 23:17:44,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:17:44,746 INFO L175 Difference]: Start difference. First operand has 198 places, 344 transitions, 6362 flow. Second operand 7 states and 133 transitions. [2024-06-27 23:17:44,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 358 transitions, 7112 flow [2024-06-27 23:17:44,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 358 transitions, 7052 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:44,961 INFO L231 Difference]: Finished difference. Result has 200 places, 347 transitions, 6379 flow [2024-06-27 23:17:44,961 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} [2024-06-27 23:17:44,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-27 23:17:44,962 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 347 transitions, 6379 flow [2024-06-27 23:17:44,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:44,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:44,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:44,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:17:44,962 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:44,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:44,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1153713200, now seen corresponding path program 2 times [2024-06-27 23:17:44,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:44,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314228475] [2024-06-27 23:17:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:44,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:45,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:45,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314228475] [2024-06-27 23:17:45,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314228475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:45,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:45,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:17:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603021505] [2024-06-27 23:17:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:45,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:17:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:17:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:17:46,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:17:46,009 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) [2024-06-27 23:17:46,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:46,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:17:46,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:46,744 INFO L124 PetriNetUnfolderBase]: 2720/4480 cut-off events. [2024-06-27 23:17:46,744 INFO L125 PetriNetUnfolderBase]: For 165453/165476 co-relation queries the response was YES. [2024-06-27 23:17:46,769 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. [2024-06-27 23:17:46,787 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 320 selfloop transitions, 20 changer transitions 0/358 dead transitions. [2024-06-27 23:17:46,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 358 transitions, 7123 flow [2024-06-27 23:17:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:17:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:17:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:17:46,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 23:17:46,789 INFO L175 Difference]: Start difference. First operand has 200 places, 347 transitions, 6379 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:17:46,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 358 transitions, 7123 flow [2024-06-27 23:17:46,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 358 transitions, 7070 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:46,978 INFO L231 Difference]: Finished difference. Result has 202 places, 350 transitions, 6418 flow [2024-06-27 23:17:46,979 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} [2024-06-27 23:17:46,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-27 23:17:46,979 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 350 transitions, 6418 flow [2024-06-27 23:17:46,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:46,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:46,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:46,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:17:46,980 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:46,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1308439421, now seen corresponding path program 1 times [2024-06-27 23:17:46,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:46,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994673549] [2024-06-27 23:17:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:46,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:48,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:48,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994673549] [2024-06-27 23:17:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994673549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:48,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:48,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:17:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870203580] [2024-06-27 23:17:48,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:48,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:17:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:17:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:17:48,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:48,990 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) [2024-06-27 23:17:48,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:48,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:48,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:50,152 INFO L124 PetriNetUnfolderBase]: 2979/4789 cut-off events. [2024-06-27 23:17:50,152 INFO L125 PetriNetUnfolderBase]: For 166980/166980 co-relation queries the response was YES. [2024-06-27 23:17:50,179 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. [2024-06-27 23:17:50,199 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 355 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2024-06-27 23:17:50,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 382 transitions, 7338 flow [2024-06-27 23:17:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:17:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:17:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 23:17:50,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 23:17:50,201 INFO L175 Difference]: Start difference. First operand has 202 places, 350 transitions, 6418 flow. Second operand 10 states and 185 transitions. [2024-06-27 23:17:50,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 382 transitions, 7338 flow [2024-06-27 23:17:50,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 382 transitions, 7268 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:50,427 INFO L231 Difference]: Finished difference. Result has 208 places, 355 transitions, 6483 flow [2024-06-27 23:17:50,427 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} [2024-06-27 23:17:50,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-27 23:17:50,428 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 355 transitions, 6483 flow [2024-06-27 23:17:50,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:50,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:50,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:50,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:17:50,428 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:50,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash 991521938, now seen corresponding path program 1 times [2024-06-27 23:17:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:50,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216984099] [2024-06-27 23:17:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:51,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:51,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216984099] [2024-06-27 23:17:51,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216984099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:51,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:51,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:51,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325336400] [2024-06-27 23:17:51,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:51,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:51,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:51,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:51,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:51,417 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) [2024-06-27 23:17:51,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:51,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:51,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:52,255 INFO L124 PetriNetUnfolderBase]: 2950/4742 cut-off events. [2024-06-27 23:17:52,255 INFO L125 PetriNetUnfolderBase]: For 198780/198803 co-relation queries the response was YES. [2024-06-27 23:17:52,282 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. [2024-06-27 23:17:52,302 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 237 selfloop transitions, 121 changer transitions 0/375 dead transitions. [2024-06-27 23:17:52,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 375 transitions, 7321 flow [2024-06-27 23:17:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:17:52,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:17:52,303 INFO L175 Difference]: Start difference. First operand has 208 places, 355 transitions, 6483 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:17:52,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 375 transitions, 7321 flow [2024-06-27 23:17:52,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 375 transitions, 7222 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 23:17:52,572 INFO L231 Difference]: Finished difference. Result has 207 places, 359 transitions, 6708 flow [2024-06-27 23:17:52,572 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} [2024-06-27 23:17:52,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-27 23:17:52,572 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 359 transitions, 6708 flow [2024-06-27 23:17:52,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:52,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:52,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:52,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:17:52,573 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)] === [2024-06-27 23:17:52,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash 991880422, now seen corresponding path program 1 times [2024-06-27 23:17:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:52,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342175386] [2024-06-27 23:17:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:52,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:53,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:53,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342175386] [2024-06-27 23:17:53,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342175386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:53,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:53,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:53,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477151581] [2024-06-27 23:17:53,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:54,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:54,001 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) [2024-06-27 23:17:54,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:54,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:54,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:54,936 INFO L124 PetriNetUnfolderBase]: 2951/4756 cut-off events. [2024-06-27 23:17:54,937 INFO L125 PetriNetUnfolderBase]: For 207429/207458 co-relation queries the response was YES. [2024-06-27 23:17:54,961 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. [2024-06-27 23:17:54,980 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 26 changer transitions 0/374 dead transitions. [2024-06-27 23:17:54,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 374 transitions, 7492 flow [2024-06-27 23:17:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 23:17:54,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 23:17:54,982 INFO L175 Difference]: Start difference. First operand has 207 places, 359 transitions, 6708 flow. Second operand 8 states and 145 transitions. [2024-06-27 23:17:54,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 374 transitions, 7492 flow [2024-06-27 23:17:55,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 374 transitions, 7265 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 23:17:55,225 INFO L231 Difference]: Finished difference. Result has 210 places, 362 transitions, 6580 flow [2024-06-27 23:17:55,225 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} [2024-06-27 23:17:55,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-27 23:17:55,226 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 362 transitions, 6580 flow [2024-06-27 23:17:55,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:55,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:55,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:55,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:17:55,226 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:17:55,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1391377298, now seen corresponding path program 2 times [2024-06-27 23:17:55,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:55,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189817877] [2024-06-27 23:17:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:56,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:56,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189817877] [2024-06-27 23:17:56,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189817877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:56,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:56,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:17:56,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406133505] [2024-06-27 23:17:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:56,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:17:56,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:17:56,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:17:56,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:56,316 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) [2024-06-27 23:17:56,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:56,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:56,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:17:57,294 INFO L124 PetriNetUnfolderBase]: 2990/4806 cut-off events. [2024-06-27 23:17:57,295 INFO L125 PetriNetUnfolderBase]: For 217037/217060 co-relation queries the response was YES. [2024-06-27 23:17:57,322 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. [2024-06-27 23:17:57,343 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 253 selfloop transitions, 113 changer transitions 0/383 dead transitions. [2024-06-27 23:17:57,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 383 transitions, 7542 flow [2024-06-27 23:17:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:17:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:17:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:17:57,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 23:17:57,344 INFO L175 Difference]: Start difference. First operand has 210 places, 362 transitions, 6580 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:17:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 383 transitions, 7542 flow [2024-06-27 23:17:57,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 383 transitions, 7479 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 23:17:57,573 INFO L231 Difference]: Finished difference. Result has 215 places, 370 transitions, 6924 flow [2024-06-27 23:17:57,574 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} [2024-06-27 23:17:57,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-27 23:17:57,574 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 370 transitions, 6924 flow [2024-06-27 23:17:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:17:57,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:17:57,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:17:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:17:57,575 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)] === [2024-06-27 23:17:57,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:17:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2035782048, now seen corresponding path program 2 times [2024-06-27 23:17:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:17:57,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902720093] [2024-06-27 23:17:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:17:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:17:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:17:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:17:59,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:17:59,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902720093] [2024-06-27 23:17:59,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902720093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:17:59,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:17:59,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:17:59,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992260550] [2024-06-27 23:17:59,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:17:59,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:17:59,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:17:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:17:59,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:17:59,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:17:59,347 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) [2024-06-27 23:17:59,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:17:59,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:17:59,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:00,206 INFO L124 PetriNetUnfolderBase]: 2998/4838 cut-off events. [2024-06-27 23:18:00,206 INFO L125 PetriNetUnfolderBase]: For 231848/231880 co-relation queries the response was YES. [2024-06-27 23:18:00,240 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. [2024-06-27 23:18:00,263 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 41 changer transitions 0/388 dead transitions. [2024-06-27 23:18:00,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 388 transitions, 7864 flow [2024-06-27 23:18:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 23:18:00,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 23:18:00,264 INFO L175 Difference]: Start difference. First operand has 215 places, 370 transitions, 6924 flow. Second operand 8 states and 144 transitions. [2024-06-27 23:18:00,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 388 transitions, 7864 flow [2024-06-27 23:18:00,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 388 transitions, 7719 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 23:18:00,526 INFO L231 Difference]: Finished difference. Result has 221 places, 378 transitions, 6986 flow [2024-06-27 23:18:00,527 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} [2024-06-27 23:18:00,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 23:18:00,537 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 378 transitions, 6986 flow [2024-06-27 23:18:00,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:00,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:00,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:00,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:18:00,537 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)] === [2024-06-27 23:18:00,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2036257278, now seen corresponding path program 3 times [2024-06-27 23:18:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:00,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098484160] [2024-06-27 23:18:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:00,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:01,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:01,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098484160] [2024-06-27 23:18:01,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098484160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:01,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:01,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:01,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807248202] [2024-06-27 23:18:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:01,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:02,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:02,092 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) [2024-06-27 23:18:02,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:02,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:02,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:02,997 INFO L124 PetriNetUnfolderBase]: 3003/4845 cut-off events. [2024-06-27 23:18:02,997 INFO L125 PetriNetUnfolderBase]: For 238220/238252 co-relation queries the response was YES. [2024-06-27 23:18:03,023 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. [2024-06-27 23:18:03,043 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 34 changer transitions 0/390 dead transitions. [2024-06-27 23:18:03,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 390 transitions, 7811 flow [2024-06-27 23:18:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:18:03,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 23:18:03,045 INFO L175 Difference]: Start difference. First operand has 221 places, 378 transitions, 6986 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:18:03,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 390 transitions, 7811 flow [2024-06-27 23:18:03,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 390 transitions, 7720 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 23:18:03,339 INFO L231 Difference]: Finished difference. Result has 225 places, 381 transitions, 7028 flow [2024-06-27 23:18:03,340 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} [2024-06-27 23:18:03,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-27 23:18:03,340 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 381 transitions, 7028 flow [2024-06-27 23:18:03,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:03,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:03,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:03,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:18:03,341 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)] === [2024-06-27 23:18:03,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2036257712, now seen corresponding path program 3 times [2024-06-27 23:18:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:03,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918212327] [2024-06-27 23:18:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:03,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:04,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:04,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918212327] [2024-06-27 23:18:04,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918212327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:04,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:04,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:04,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039135405] [2024-06-27 23:18:04,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:04,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:04,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:04,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:04,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:04,501 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) [2024-06-27 23:18:04,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:04,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:04,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:05,373 INFO L124 PetriNetUnfolderBase]: 3041/4881 cut-off events. [2024-06-27 23:18:05,373 INFO L125 PetriNetUnfolderBase]: For 253104/253127 co-relation queries the response was YES. [2024-06-27 23:18:05,402 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. [2024-06-27 23:18:05,424 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 260 selfloop transitions, 128 changer transitions 0/405 dead transitions. [2024-06-27 23:18:05,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 405 transitions, 8222 flow [2024-06-27 23:18:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:18:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:18:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 23:18:05,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 23:18:05,425 INFO L175 Difference]: Start difference. First operand has 225 places, 381 transitions, 7028 flow. Second operand 7 states and 141 transitions. [2024-06-27 23:18:05,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 405 transitions, 8222 flow [2024-06-27 23:18:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 405 transitions, 8128 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:05,744 INFO L231 Difference]: Finished difference. Result has 227 places, 392 transitions, 7406 flow [2024-06-27 23:18:05,744 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} [2024-06-27 23:18:05,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-27 23:18:05,745 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 392 transitions, 7406 flow [2024-06-27 23:18:05,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:05,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:05,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:05,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:18:05,750 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)] === [2024-06-27 23:18:05,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1421817916, now seen corresponding path program 4 times [2024-06-27 23:18:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983705165] [2024-06-27 23:18:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:06,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:06,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983705165] [2024-06-27 23:18:06,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983705165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:06,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:06,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329137851] [2024-06-27 23:18:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:06,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:06,696 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) [2024-06-27 23:18:06,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:06,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:06,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:07,696 INFO L124 PetriNetUnfolderBase]: 3100/4971 cut-off events. [2024-06-27 23:18:07,696 INFO L125 PetriNetUnfolderBase]: For 271307/271334 co-relation queries the response was YES. [2024-06-27 23:18:07,727 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. [2024-06-27 23:18:07,749 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 276 selfloop transitions, 143 changer transitions 0/436 dead transitions. [2024-06-27 23:18:07,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 436 transitions, 8765 flow [2024-06-27 23:18:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 23:18:07,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 23:18:07,751 INFO L175 Difference]: Start difference. First operand has 227 places, 392 transitions, 7406 flow. Second operand 8 states and 164 transitions. [2024-06-27 23:18:07,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 436 transitions, 8765 flow [2024-06-27 23:18:08,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 436 transitions, 8550 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-27 23:18:08,132 INFO L231 Difference]: Finished difference. Result has 234 places, 413 transitions, 8023 flow [2024-06-27 23:18:08,133 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} [2024-06-27 23:18:08,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-27 23:18:08,133 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 413 transitions, 8023 flow [2024-06-27 23:18:08,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:08,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:08,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:08,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:18:08,134 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:08,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash -840914222, now seen corresponding path program 5 times [2024-06-27 23:18:08,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:08,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077016429] [2024-06-27 23:18:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:08,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:08,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077016429] [2024-06-27 23:18:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077016429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:08,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:08,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713059134] [2024-06-27 23:18:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:09,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:09,060 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) [2024-06-27 23:18:09,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:09,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:09,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:10,127 INFO L124 PetriNetUnfolderBase]: 3132/5020 cut-off events. [2024-06-27 23:18:10,127 INFO L125 PetriNetUnfolderBase]: For 279985/280014 co-relation queries the response was YES. [2024-06-27 23:18:10,160 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. [2024-06-27 23:18:10,183 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 289 selfloop transitions, 139 changer transitions 0/445 dead transitions. [2024-06-27 23:18:10,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 445 transitions, 9133 flow [2024-06-27 23:18:10,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:18:10,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-27 23:18:10,185 INFO L175 Difference]: Start difference. First operand has 234 places, 413 transitions, 8023 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:18:10,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 445 transitions, 9133 flow [2024-06-27 23:18:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 445 transitions, 8779 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:10,542 INFO L231 Difference]: Finished difference. Result has 236 places, 424 transitions, 8178 flow [2024-06-27 23:18:10,543 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} [2024-06-27 23:18:10,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-27 23:18:10,543 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 424 transitions, 8178 flow [2024-06-27 23:18:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:10,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:10,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:10,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:18:10,544 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:10,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash -840556172, now seen corresponding path program 6 times [2024-06-27 23:18:10,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:10,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338638958] [2024-06-27 23:18:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:10,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:11,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338638958] [2024-06-27 23:18:11,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338638958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:11,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:11,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:11,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142611047] [2024-06-27 23:18:11,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:11,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:11,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:11,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:11,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:11,630 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) [2024-06-27 23:18:11,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:11,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:11,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:12,626 INFO L124 PetriNetUnfolderBase]: 3186/5106 cut-off events. [2024-06-27 23:18:12,626 INFO L125 PetriNetUnfolderBase]: For 294107/294134 co-relation queries the response was YES. [2024-06-27 23:18:12,659 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. [2024-06-27 23:18:12,683 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 294 selfloop transitions, 145 changer transitions 0/456 dead transitions. [2024-06-27 23:18:12,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 456 transitions, 9404 flow [2024-06-27 23:18:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:18:12,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:18:12,697 INFO L175 Difference]: Start difference. First operand has 236 places, 424 transitions, 8178 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:18:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 456 transitions, 9404 flow [2024-06-27 23:18:13,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 456 transitions, 9108 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:13,031 INFO L231 Difference]: Finished difference. Result has 239 places, 437 transitions, 8466 flow [2024-06-27 23:18:13,032 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} [2024-06-27 23:18:13,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-27 23:18:13,034 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 437 transitions, 8466 flow [2024-06-27 23:18:13,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:13,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:13,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:13,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:18:13,034 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:13,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash -799444158, now seen corresponding path program 4 times [2024-06-27 23:18:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:13,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200970099] [2024-06-27 23:18:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:13,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:14,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200970099] [2024-06-27 23:18:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200970099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:14,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:14,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886618128] [2024-06-27 23:18:14,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:14,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:14,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:14,296 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) [2024-06-27 23:18:14,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:14,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:14,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:15,312 INFO L124 PetriNetUnfolderBase]: 3185/5127 cut-off events. [2024-06-27 23:18:15,313 INFO L125 PetriNetUnfolderBase]: For 304022/304051 co-relation queries the response was YES. [2024-06-27 23:18:15,349 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. [2024-06-27 23:18:15,374 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 30 changer transitions 0/459 dead transitions. [2024-06-27 23:18:15,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 459 transitions, 9440 flow [2024-06-27 23:18:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:18:15,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:18:15,376 INFO L175 Difference]: Start difference. First operand has 239 places, 437 transitions, 8466 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:18:15,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 459 transitions, 9440 flow [2024-06-27 23:18:15,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 459 transitions, 8958 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 23:18:15,869 INFO L231 Difference]: Finished difference. Result has 240 places, 441 transitions, 8092 flow [2024-06-27 23:18:15,869 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} [2024-06-27 23:18:15,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-27 23:18:15,870 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 441 transitions, 8092 flow [2024-06-27 23:18:15,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:15,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:15,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:15,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:18:15,870 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:15,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196454, now seen corresponding path program 1 times [2024-06-27 23:18:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:15,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326979419] [2024-06-27 23:18:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:15,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:17,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326979419] [2024-06-27 23:18:17,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326979419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:17,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:17,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545717979] [2024-06-27 23:18:17,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:17,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:17,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:17,376 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) [2024-06-27 23:18:17,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:17,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:17,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:18,421 INFO L124 PetriNetUnfolderBase]: 3191/5129 cut-off events. [2024-06-27 23:18:18,421 INFO L125 PetriNetUnfolderBase]: For 306589/306616 co-relation queries the response was YES. [2024-06-27 23:18:18,453 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. [2024-06-27 23:18:18,475 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 421 selfloop transitions, 18 changer transitions 0/456 dead transitions. [2024-06-27 23:18:18,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 456 transitions, 9058 flow [2024-06-27 23:18:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 23:18:18,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 23:18:18,477 INFO L175 Difference]: Start difference. First operand has 240 places, 441 transitions, 8092 flow. Second operand 8 states and 142 transitions. [2024-06-27 23:18:18,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 456 transitions, 9058 flow [2024-06-27 23:18:18,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 456 transitions, 9006 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:18:18,894 INFO L231 Difference]: Finished difference. Result has 243 places, 444 transitions, 8134 flow [2024-06-27 23:18:18,895 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} [2024-06-27 23:18:18,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-27 23:18:18,895 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 444 transitions, 8134 flow [2024-06-27 23:18:18,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:18,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:18,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:18,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:18:18,896 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)] === [2024-06-27 23:18:18,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1698851902, now seen corresponding path program 2 times [2024-06-27 23:18:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:18,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723506597] [2024-06-27 23:18:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:18,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:21,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:21,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723506597] [2024-06-27 23:18:21,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723506597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:21,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:21,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:18:21,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157989429] [2024-06-27 23:18:21,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:21,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:18:21,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:18:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:18:21,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:18:21,194 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) [2024-06-27 23:18:21,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:21,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:18:21,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:22,297 INFO L124 PetriNetUnfolderBase]: 3093/5034 cut-off events. [2024-06-27 23:18:22,297 INFO L125 PetriNetUnfolderBase]: For 318753/318780 co-relation queries the response was YES. [2024-06-27 23:18:22,330 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. [2024-06-27 23:18:22,353 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 408 selfloop transitions, 23 changer transitions 0/456 dead transitions. [2024-06-27 23:18:22,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 456 transitions, 9070 flow [2024-06-27 23:18:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:18:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:18:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:18:22,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 23:18:22,363 INFO L175 Difference]: Start difference. First operand has 243 places, 444 transitions, 8134 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:18:22,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 456 transitions, 9070 flow [2024-06-27 23:18:22,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 456 transitions, 8998 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:22,790 INFO L231 Difference]: Finished difference. Result has 245 places, 447 transitions, 8166 flow [2024-06-27 23:18:22,790 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} [2024-06-27 23:18:22,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-27 23:18:22,791 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 447 transitions, 8166 flow [2024-06-27 23:18:22,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:22,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:22,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:22,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:18:22,791 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)] === [2024-06-27 23:18:22,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1405668484, now seen corresponding path program 3 times [2024-06-27 23:18:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:22,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072589513] [2024-06-27 23:18:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:22,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072589513] [2024-06-27 23:18:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072589513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:24,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:24,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:18:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637574052] [2024-06-27 23:18:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:24,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:18:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:18:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:18:24,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:18:24,484 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) [2024-06-27 23:18:24,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:24,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:18:24,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:25,471 INFO L124 PetriNetUnfolderBase]: 3198/5138 cut-off events. [2024-06-27 23:18:25,471 INFO L125 PetriNetUnfolderBase]: For 324240/324267 co-relation queries the response was YES. [2024-06-27 23:18:25,507 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. [2024-06-27 23:18:25,532 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 414 selfloop transitions, 31 changer transitions 0/462 dead transitions. [2024-06-27 23:18:25,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 462 transitions, 9198 flow [2024-06-27 23:18:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:18:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:18:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 23:18:25,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 23:18:25,543 INFO L175 Difference]: Start difference. First operand has 245 places, 447 transitions, 8166 flow. Second operand 7 states and 131 transitions. [2024-06-27 23:18:25,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 462 transitions, 9198 flow [2024-06-27 23:18:26,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 462 transitions, 9082 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:26,078 INFO L231 Difference]: Finished difference. Result has 247 places, 453 transitions, 8254 flow [2024-06-27 23:18:26,079 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} [2024-06-27 23:18:26,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-27 23:18:26,079 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 453 transitions, 8254 flow [2024-06-27 23:18:26,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:26,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:26,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:26,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:18:26,080 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:26,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2063236778, now seen corresponding path program 1 times [2024-06-27 23:18:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:26,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399379771] [2024-06-27 23:18:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:26,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:27,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399379771] [2024-06-27 23:18:27,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399379771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:27,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:27,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:27,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368300852] [2024-06-27 23:18:27,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:27,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:27,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:27,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:27,923 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) [2024-06-27 23:18:27,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:27,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:27,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:29,473 INFO L124 PetriNetUnfolderBase]: 3625/5681 cut-off events. [2024-06-27 23:18:29,473 INFO L125 PetriNetUnfolderBase]: For 353844/353847 co-relation queries the response was YES. [2024-06-27 23:18:29,514 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. [2024-06-27 23:18:29,541 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 271 selfloop transitions, 213 changer transitions 0/489 dead transitions. [2024-06-27 23:18:29,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 489 transitions, 9438 flow [2024-06-27 23:18:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:18:29,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 23:18:29,542 INFO L175 Difference]: Start difference. First operand has 247 places, 453 transitions, 8254 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:18:29,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 489 transitions, 9438 flow [2024-06-27 23:18:30,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 489 transitions, 9356 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 23:18:30,108 INFO L231 Difference]: Finished difference. Result has 254 places, 455 transitions, 8662 flow [2024-06-27 23:18:30,108 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} [2024-06-27 23:18:30,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-27 23:18:30,109 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 455 transitions, 8662 flow [2024-06-27 23:18:30,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:30,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:30,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:30,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:18:30,109 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:30,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2063059148, now seen corresponding path program 2 times [2024-06-27 23:18:30,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866940120] [2024-06-27 23:18:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:30,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:31,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:31,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866940120] [2024-06-27 23:18:31,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866940120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:31,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:31,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:31,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523992712] [2024-06-27 23:18:31,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:31,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:31,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:31,939 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) [2024-06-27 23:18:31,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:31,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:31,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:33,594 INFO L124 PetriNetUnfolderBase]: 3733/5872 cut-off events. [2024-06-27 23:18:33,595 INFO L125 PetriNetUnfolderBase]: For 371266/371269 co-relation queries the response was YES. [2024-06-27 23:18:33,635 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. [2024-06-27 23:18:33,662 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 281 selfloop transitions, 218 changer transitions 0/504 dead transitions. [2024-06-27 23:18:33,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 504 transitions, 9972 flow [2024-06-27 23:18:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 23:18:33,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 23:18:33,663 INFO L175 Difference]: Start difference. First operand has 254 places, 455 transitions, 8662 flow. Second operand 10 states and 201 transitions. [2024-06-27 23:18:33,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 504 transitions, 9972 flow [2024-06-27 23:18:34,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 504 transitions, 9623 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:34,257 INFO L231 Difference]: Finished difference. Result has 259 places, 464 transitions, 8910 flow [2024-06-27 23:18:34,258 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} [2024-06-27 23:18:34,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-27 23:18:34,258 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 464 transitions, 8910 flow [2024-06-27 23:18:34,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:34,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:34,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:34,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:18:34,259 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:34,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1884417494, now seen corresponding path program 3 times [2024-06-27 23:18:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:34,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407553613] [2024-06-27 23:18:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:35,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:35,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407553613] [2024-06-27 23:18:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407553613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:35,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:35,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:35,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221200127] [2024-06-27 23:18:35,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:35,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:35,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:35,986 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) [2024-06-27 23:18:35,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:35,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:35,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:37,487 INFO L124 PetriNetUnfolderBase]: 3791/5977 cut-off events. [2024-06-27 23:18:37,487 INFO L125 PetriNetUnfolderBase]: For 388805/388808 co-relation queries the response was YES. [2024-06-27 23:18:37,531 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. [2024-06-27 23:18:37,559 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 281 selfloop transitions, 225 changer transitions 0/511 dead transitions. [2024-06-27 23:18:37,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 511 transitions, 10193 flow [2024-06-27 23:18:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 23:18:37,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 23:18:37,565 INFO L175 Difference]: Start difference. First operand has 259 places, 464 transitions, 8910 flow. Second operand 10 states and 202 transitions. [2024-06-27 23:18:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 511 transitions, 10193 flow [2024-06-27 23:18:38,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 511 transitions, 9629 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 23:18:38,185 INFO L231 Difference]: Finished difference. Result has 262 places, 470 transitions, 8921 flow [2024-06-27 23:18:38,185 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} [2024-06-27 23:18:38,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-27 23:18:38,186 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 470 transitions, 8921 flow [2024-06-27 23:18:38,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:38,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:38,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:38,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:18:38,186 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:38,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -334988758, now seen corresponding path program 4 times [2024-06-27 23:18:38,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:38,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323018499] [2024-06-27 23:18:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:38,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:39,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:39,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323018499] [2024-06-27 23:18:39,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323018499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:39,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:39,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:39,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881291584] [2024-06-27 23:18:39,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:39,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:39,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:39,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:39,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:39,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:39,875 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) [2024-06-27 23:18:39,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:39,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:39,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:41,469 INFO L124 PetriNetUnfolderBase]: 3985/6337 cut-off events. [2024-06-27 23:18:41,470 INFO L125 PetriNetUnfolderBase]: For 419683/419686 co-relation queries the response was YES. [2024-06-27 23:18:41,510 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. [2024-06-27 23:18:41,537 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 292 selfloop transitions, 224 changer transitions 0/521 dead transitions. [2024-06-27 23:18:41,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 521 transitions, 10398 flow [2024-06-27 23:18:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 23:18:41,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 23:18:41,539 INFO L175 Difference]: Start difference. First operand has 262 places, 470 transitions, 8921 flow. Second operand 10 states and 202 transitions. [2024-06-27 23:18:41,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 521 transitions, 10398 flow [2024-06-27 23:18:42,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 521 transitions, 9947 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 23:18:42,301 INFO L231 Difference]: Finished difference. Result has 267 places, 477 transitions, 9036 flow [2024-06-27 23:18:42,302 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} [2024-06-27 23:18:42,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-27 23:18:42,302 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 477 transitions, 9036 flow [2024-06-27 23:18:42,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:42,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:42,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:42,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:18:42,303 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:42,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1536214476, now seen corresponding path program 5 times [2024-06-27 23:18:42,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:42,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329834831] [2024-06-27 23:18:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:42,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:43,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:43,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329834831] [2024-06-27 23:18:43,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329834831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:43,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264166392] [2024-06-27 23:18:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:43,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:43,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:44,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:44,036 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) [2024-06-27 23:18:44,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:44,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:44,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:45,737 INFO L124 PetriNetUnfolderBase]: 4143/6617 cut-off events. [2024-06-27 23:18:45,737 INFO L125 PetriNetUnfolderBase]: For 446489/446492 co-relation queries the response was YES. [2024-06-27 23:18:45,787 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. [2024-06-27 23:18:45,816 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 292 selfloop transitions, 233 changer transitions 0/530 dead transitions. [2024-06-27 23:18:45,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 530 transitions, 10566 flow [2024-06-27 23:18:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 23:18:45,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 23:18:45,818 INFO L175 Difference]: Start difference. First operand has 267 places, 477 transitions, 9036 flow. Second operand 10 states and 206 transitions. [2024-06-27 23:18:45,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 530 transitions, 10566 flow [2024-06-27 23:18:46,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 530 transitions, 10324 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 23:18:46,583 INFO L231 Difference]: Finished difference. Result has 274 places, 486 transitions, 9491 flow [2024-06-27 23:18:46,584 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} [2024-06-27 23:18:46,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 23:18:46,584 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 486 transitions, 9491 flow [2024-06-27 23:18:46,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:46,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:46,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:46,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:18:46,585 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:46,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:46,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1540976076, now seen corresponding path program 6 times [2024-06-27 23:18:46,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:46,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105168611] [2024-06-27 23:18:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:46,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:48,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105168611] [2024-06-27 23:18:48,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105168611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:48,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:48,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907140629] [2024-06-27 23:18:48,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:48,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:48,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:48,519 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) [2024-06-27 23:18:48,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:48,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:48,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:50,469 INFO L124 PetriNetUnfolderBase]: 4218/6747 cut-off events. [2024-06-27 23:18:50,470 INFO L125 PetriNetUnfolderBase]: For 470577/470580 co-relation queries the response was YES. [2024-06-27 23:18:50,516 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. [2024-06-27 23:18:50,544 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 292 selfloop transitions, 226 changer transitions 0/523 dead transitions. [2024-06-27 23:18:50,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 523 transitions, 10727 flow [2024-06-27 23:18:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:18:50,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 23:18:50,546 INFO L175 Difference]: Start difference. First operand has 274 places, 486 transitions, 9491 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:18:50,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 523 transitions, 10727 flow [2024-06-27 23:18:51,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 523 transitions, 10400 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:18:51,451 INFO L231 Difference]: Finished difference. Result has 279 places, 487 transitions, 9666 flow [2024-06-27 23:18:51,452 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} [2024-06-27 23:18:51,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-27 23:18:51,452 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 487 transitions, 9666 flow [2024-06-27 23:18:51,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:51,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:51,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:51,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:18:51,453 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:51,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1540798446, now seen corresponding path program 7 times [2024-06-27 23:18:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:51,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167386916] [2024-06-27 23:18:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167386916] [2024-06-27 23:18:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167386916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:53,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486925186] [2024-06-27 23:18:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:53,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:53,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:53,130 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) [2024-06-27 23:18:53,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:53,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:53,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:54,987 INFO L124 PetriNetUnfolderBase]: 4315/6908 cut-off events. [2024-06-27 23:18:54,987 INFO L125 PetriNetUnfolderBase]: For 481008/481011 co-relation queries the response was YES. [2024-06-27 23:18:55,042 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. [2024-06-27 23:18:55,074 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 302 selfloop transitions, 229 changer transitions 0/536 dead transitions. [2024-06-27 23:18:55,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 536 transitions, 11043 flow [2024-06-27 23:18:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 23:18:55,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-27 23:18:55,076 INFO L175 Difference]: Start difference. First operand has 279 places, 487 transitions, 9666 flow. Second operand 10 states and 203 transitions. [2024-06-27 23:18:55,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 536 transitions, 11043 flow [2024-06-27 23:18:55,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 536 transitions, 10455 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 23:18:55,959 INFO L231 Difference]: Finished difference. Result has 281 places, 494 transitions, 9697 flow [2024-06-27 23:18:55,959 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} [2024-06-27 23:18:55,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-27 23:18:55,959 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 494 transitions, 9697 flow [2024-06-27 23:18:55,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:18:55,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:18:55,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:18:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:18:55,960 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:18:55,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:18:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1361391342, now seen corresponding path program 8 times [2024-06-27 23:18:55,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:18:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732547141] [2024-06-27 23:18:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:18:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:18:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:18:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:18:57,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:18:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732547141] [2024-06-27 23:18:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732547141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:18:57,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:18:57,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:18:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584498998] [2024-06-27 23:18:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:18:57,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:18:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:18:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:18:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:18:57,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:18:57,789 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) [2024-06-27 23:18:57,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:18:57,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:18:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:18:59,739 INFO L124 PetriNetUnfolderBase]: 4390/7026 cut-off events. [2024-06-27 23:18:59,739 INFO L125 PetriNetUnfolderBase]: For 498844/498847 co-relation queries the response was YES. [2024-06-27 23:18:59,797 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. [2024-06-27 23:18:59,829 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 307 selfloop transitions, 219 changer transitions 0/531 dead transitions. [2024-06-27 23:18:59,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 531 transitions, 10973 flow [2024-06-27 23:18:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:18:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:18:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:18:59,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 23:18:59,831 INFO L175 Difference]: Start difference. First operand has 281 places, 494 transitions, 9697 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:18:59,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 531 transitions, 10973 flow [2024-06-27 23:19:00,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 531 transitions, 10506 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 23:19:00,752 INFO L231 Difference]: Finished difference. Result has 284 places, 495 transitions, 9722 flow [2024-06-27 23:19:00,752 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} [2024-06-27 23:19:00,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-27 23:19:00,753 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 495 transitions, 9722 flow [2024-06-27 23:19:00,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:00,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:00,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:00,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:19:00,753 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:00,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:00,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1707209856, now seen corresponding path program 9 times [2024-06-27 23:19:00,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:00,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942466667] [2024-06-27 23:19:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:00,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:02,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:02,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942466667] [2024-06-27 23:19:02,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942466667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:02,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:02,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:02,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209146613] [2024-06-27 23:19:02,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:02,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:02,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:02,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:02,481 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) [2024-06-27 23:19:02,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:02,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:02,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:04,612 INFO L124 PetriNetUnfolderBase]: 4465/7162 cut-off events. [2024-06-27 23:19:04,612 INFO L125 PetriNetUnfolderBase]: For 514458/514461 co-relation queries the response was YES. [2024-06-27 23:19:04,677 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. [2024-06-27 23:19:04,713 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 315 selfloop transitions, 215 changer transitions 0/535 dead transitions. [2024-06-27 23:19:04,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 535 transitions, 11047 flow [2024-06-27 23:19:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:19:04,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 23:19:04,715 INFO L175 Difference]: Start difference. First operand has 284 places, 495 transitions, 9722 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:19:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 535 transitions, 11047 flow [2024-06-27 23:19:05,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 535 transitions, 10590 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 23:19:05,549 INFO L231 Difference]: Finished difference. Result has 286 places, 496 transitions, 9751 flow [2024-06-27 23:19:05,549 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} [2024-06-27 23:19:05,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-27 23:19:05,549 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 496 transitions, 9751 flow [2024-06-27 23:19:05,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:05,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:05,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:05,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:19:05,550 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:05,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1707032226, now seen corresponding path program 10 times [2024-06-27 23:19:05,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:05,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144334315] [2024-06-27 23:19:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:07,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144334315] [2024-06-27 23:19:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144334315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164083165] [2024-06-27 23:19:07,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:07,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:07,394 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) [2024-06-27 23:19:07,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:07,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:07,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:09,354 INFO L124 PetriNetUnfolderBase]: 4562/7323 cut-off events. [2024-06-27 23:19:09,355 INFO L125 PetriNetUnfolderBase]: For 527838/527841 co-relation queries the response was YES. [2024-06-27 23:19:09,415 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. [2024-06-27 23:19:09,448 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 322 selfloop transitions, 219 changer transitions 0/546 dead transitions. [2024-06-27 23:19:09,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 546 transitions, 11209 flow [2024-06-27 23:19:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 23:19:09,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 23:19:09,450 INFO L175 Difference]: Start difference. First operand has 286 places, 496 transitions, 9751 flow. Second operand 10 states and 201 transitions. [2024-06-27 23:19:09,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 546 transitions, 11209 flow [2024-06-27 23:19:10,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 546 transitions, 10796 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:19:10,358 INFO L231 Difference]: Finished difference. Result has 290 places, 503 transitions, 9964 flow [2024-06-27 23:19:10,359 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} [2024-06-27 23:19:10,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-27 23:19:10,359 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 503 transitions, 9964 flow [2024-06-27 23:19:10,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:10,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:10,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:10,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:19:10,360 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)] === [2024-06-27 23:19:10,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash 675894543, now seen corresponding path program 1 times [2024-06-27 23:19:10,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:10,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68593348] [2024-06-27 23:19:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68593348] [2024-06-27 23:19:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68593348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:11,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:11,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:19:11,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940166290] [2024-06-27 23:19:11,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:11,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:19:11,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:11,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:19:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:19:11,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:11,328 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) [2024-06-27 23:19:11,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:11,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:11,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:12,893 INFO L124 PetriNetUnfolderBase]: 4252/6949 cut-off events. [2024-06-27 23:19:12,894 INFO L125 PetriNetUnfolderBase]: For 533466/533501 co-relation queries the response was YES. [2024-06-27 23:19:12,952 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. [2024-06-27 23:19:12,985 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 378 selfloop transitions, 128 changer transitions 0/526 dead transitions. [2024-06-27 23:19:12,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 526 transitions, 11186 flow [2024-06-27 23:19:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:19:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:19:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:19:12,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:19:12,987 INFO L175 Difference]: Start difference. First operand has 290 places, 503 transitions, 9964 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:19:12,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 526 transitions, 11186 flow [2024-06-27 23:19:13,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 526 transitions, 10692 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 23:19:13,887 INFO L231 Difference]: Finished difference. Result has 290 places, 511 transitions, 9901 flow [2024-06-27 23:19:13,887 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} [2024-06-27 23:19:13,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-27 23:19:13,888 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 511 transitions, 9901 flow [2024-06-27 23:19:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:13,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:13,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:13,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:19:13,888 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)] === [2024-06-27 23:19:13,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:13,889 INFO L85 PathProgramCache]: Analyzing trace with hash 683513103, now seen corresponding path program 2 times [2024-06-27 23:19:13,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:13,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765081176] [2024-06-27 23:19:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:13,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:14,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765081176] [2024-06-27 23:19:14,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765081176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:14,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:14,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:19:14,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193043241] [2024-06-27 23:19:14,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:14,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:19:14,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:19:14,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:19:14,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:14,967 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) [2024-06-27 23:19:14,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:14,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:14,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:16,563 INFO L124 PetriNetUnfolderBase]: 4272/6986 cut-off events. [2024-06-27 23:19:16,564 INFO L125 PetriNetUnfolderBase]: For 531742/531777 co-relation queries the response was YES. [2024-06-27 23:19:16,616 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. [2024-06-27 23:19:16,646 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 360 selfloop transitions, 150 changer transitions 0/530 dead transitions. [2024-06-27 23:19:16,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 530 transitions, 11211 flow [2024-06-27 23:19:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:19:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:19:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:19:16,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 23:19:16,648 INFO L175 Difference]: Start difference. First operand has 290 places, 511 transitions, 9901 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:19:16,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 530 transitions, 11211 flow [2024-06-27 23:19:17,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 530 transitions, 10894 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 23:19:17,631 INFO L231 Difference]: Finished difference. Result has 292 places, 517 transitions, 10039 flow [2024-06-27 23:19:17,632 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} [2024-06-27 23:19:17,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 23:19:17,632 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 517 transitions, 10039 flow [2024-06-27 23:19:17,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:17,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:17,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:17,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:19:17,633 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)] === [2024-06-27 23:19:17,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1517809156, now seen corresponding path program 1 times [2024-06-27 23:19:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62866942] [2024-06-27 23:19:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:18,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62866942] [2024-06-27 23:19:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62866942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:18,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:18,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:19:18,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439380640] [2024-06-27 23:19:18,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:18,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:19:18,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:19:18,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:19:18,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:18,989 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) [2024-06-27 23:19:18,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:18,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:20,531 INFO L124 PetriNetUnfolderBase]: 4285/7007 cut-off events. [2024-06-27 23:19:20,532 INFO L125 PetriNetUnfolderBase]: For 545584/545620 co-relation queries the response was YES. [2024-06-27 23:19:20,593 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. [2024-06-27 23:19:20,626 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 374 selfloop transitions, 143 changer transitions 0/537 dead transitions. [2024-06-27 23:19:20,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 537 transitions, 11205 flow [2024-06-27 23:19:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:19:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:19:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:19:20,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:19:20,628 INFO L175 Difference]: Start difference. First operand has 292 places, 517 transitions, 10039 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:19:20,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 537 transitions, 11205 flow [2024-06-27 23:19:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 537 transitions, 10894 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 23:19:21,670 INFO L231 Difference]: Finished difference. Result has 295 places, 521 transitions, 10113 flow [2024-06-27 23:19:21,670 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} [2024-06-27 23:19:21,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-27 23:19:21,670 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 521 transitions, 10113 flow [2024-06-27 23:19:21,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:21,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:21,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:21,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:19:21,671 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:21,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash 683522558, now seen corresponding path program 2 times [2024-06-27 23:19:21,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106557600] [2024-06-27 23:19:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:23,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106557600] [2024-06-27 23:19:23,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106557600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140419453] [2024-06-27 23:19:23,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:23,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:23,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:23,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:23,285 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) [2024-06-27 23:19:23,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:23,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:23,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:24,890 INFO L124 PetriNetUnfolderBase]: 4335/7088 cut-off events. [2024-06-27 23:19:24,890 INFO L125 PetriNetUnfolderBase]: For 568578/568613 co-relation queries the response was YES. [2024-06-27 23:19:24,947 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. [2024-06-27 23:19:24,980 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 369 selfloop transitions, 156 changer transitions 0/545 dead transitions. [2024-06-27 23:19:24,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 545 transitions, 11651 flow [2024-06-27 23:19:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:19:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:19:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:19:24,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:19:24,981 INFO L175 Difference]: Start difference. First operand has 295 places, 521 transitions, 10113 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:19:24,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 545 transitions, 11651 flow [2024-06-27 23:19:25,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 545 transitions, 11352 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 23:19:25,870 INFO L231 Difference]: Finished difference. Result has 300 places, 529 transitions, 10338 flow [2024-06-27 23:19:25,870 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} [2024-06-27 23:19:25,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 23:19:25,871 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 529 transitions, 10338 flow [2024-06-27 23:19:25,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:25,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:25,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:25,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:19:25,872 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:25,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1528922191, now seen corresponding path program 1 times [2024-06-27 23:19:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:25,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455934568] [2024-06-27 23:19:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:25,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:27,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:27,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455934568] [2024-06-27 23:19:27,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455934568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:27,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:27,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:19:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19946336] [2024-06-27 23:19:27,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:19:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:19:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:19:27,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:19:27,992 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) [2024-06-27 23:19:27,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:27,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:19:27,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:29,629 INFO L124 PetriNetUnfolderBase]: 4338/7111 cut-off events. [2024-06-27 23:19:29,629 INFO L125 PetriNetUnfolderBase]: For 590209/590247 co-relation queries the response was YES. [2024-06-27 23:19:29,691 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. [2024-06-27 23:19:29,725 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 491 selfloop transitions, 37 changer transitions 0/548 dead transitions. [2024-06-27 23:19:29,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 548 transitions, 11516 flow [2024-06-27 23:19:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:19:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:19:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 23:19:29,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 23:19:29,726 INFO L175 Difference]: Start difference. First operand has 300 places, 529 transitions, 10338 flow. Second operand 8 states and 157 transitions. [2024-06-27 23:19:29,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 548 transitions, 11516 flow [2024-06-27 23:19:30,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 548 transitions, 11215 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 23:19:30,815 INFO L231 Difference]: Finished difference. Result has 302 places, 532 transitions, 10193 flow [2024-06-27 23:19:30,815 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} [2024-06-27 23:19:30,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-27 23:19:30,816 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 532 transitions, 10193 flow [2024-06-27 23:19:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:30,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:30,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:19:30,816 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:30,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 183024260, now seen corresponding path program 3 times [2024-06-27 23:19:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:30,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815730186] [2024-06-27 23:19:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:30,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:32,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815730186] [2024-06-27 23:19:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815730186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:32,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:32,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:19:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376208186] [2024-06-27 23:19:32,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:32,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:19:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:19:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:19:32,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:32,452 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) [2024-06-27 23:19:32,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:32,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:32,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:34,244 INFO L124 PetriNetUnfolderBase]: 4353/7115 cut-off events. [2024-06-27 23:19:34,244 INFO L125 PetriNetUnfolderBase]: For 596572/596607 co-relation queries the response was YES. [2024-06-27 23:19:34,301 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. [2024-06-27 23:19:34,332 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 375 selfloop transitions, 155 changer transitions 0/550 dead transitions. [2024-06-27 23:19:34,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 550 transitions, 11508 flow [2024-06-27 23:19:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:19:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:19:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:19:34,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 23:19:34,335 INFO L175 Difference]: Start difference. First operand has 302 places, 532 transitions, 10193 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:19:34,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 550 transitions, 11508 flow [2024-06-27 23:19:35,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 11378 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 23:19:35,475 INFO L231 Difference]: Finished difference. Result has 305 places, 536 transitions, 10478 flow [2024-06-27 23:19:35,475 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} [2024-06-27 23:19:35,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 23:19:35,476 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 536 transitions, 10478 flow [2024-06-27 23:19:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:35,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:35,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:35,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:19:35,476 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:35,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash -128794042, now seen corresponding path program 11 times [2024-06-27 23:19:35,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:35,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673419129] [2024-06-27 23:19:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:35,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:37,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673419129] [2024-06-27 23:19:37,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673419129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693547187] [2024-06-27 23:19:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:37,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:37,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:37,172 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) [2024-06-27 23:19:37,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:37,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:37,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:39,349 INFO L124 PetriNetUnfolderBase]: 4780/7659 cut-off events. [2024-06-27 23:19:39,349 INFO L125 PetriNetUnfolderBase]: For 641838/641841 co-relation queries the response was YES. [2024-06-27 23:19:39,414 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. [2024-06-27 23:19:39,448 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 344 selfloop transitions, 225 changer transitions 0/574 dead transitions. [2024-06-27 23:19:39,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 574 transitions, 11867 flow [2024-06-27 23:19:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 23:19:39,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 23:19:39,450 INFO L175 Difference]: Start difference. First operand has 305 places, 536 transitions, 10478 flow. Second operand 10 states and 191 transitions. [2024-06-27 23:19:39,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 574 transitions, 11867 flow [2024-06-27 23:19:40,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 574 transitions, 11558 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 23:19:40,701 INFO L231 Difference]: Finished difference. Result has 309 places, 537 transitions, 10677 flow [2024-06-27 23:19:40,702 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} [2024-06-27 23:19:40,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 23:19:40,702 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 537 transitions, 10677 flow [2024-06-27 23:19:40,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:40,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:40,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:40,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:19:40,703 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:40,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1357750698, now seen corresponding path program 12 times [2024-06-27 23:19:40,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:40,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121385883] [2024-06-27 23:19:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:42,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:42,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121385883] [2024-06-27 23:19:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121385883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:42,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:42,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:42,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224254747] [2024-06-27 23:19:42,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:42,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:42,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:42,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:42,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:42,452 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) [2024-06-27 23:19:42,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:42,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:42,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:44,629 INFO L124 PetriNetUnfolderBase]: 4855/7785 cut-off events. [2024-06-27 23:19:44,629 INFO L125 PetriNetUnfolderBase]: For 668631/668634 co-relation queries the response was YES. [2024-06-27 23:19:44,697 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. [2024-06-27 23:19:44,733 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 368 selfloop transitions, 205 changer transitions 0/578 dead transitions. [2024-06-27 23:19:44,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 578 transitions, 12131 flow [2024-06-27 23:19:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 23:19:44,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 23:19:44,735 INFO L175 Difference]: Start difference. First operand has 309 places, 537 transitions, 10677 flow. Second operand 10 states and 194 transitions. [2024-06-27 23:19:44,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 578 transitions, 12131 flow [2024-06-27 23:19:46,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 578 transitions, 11573 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 23:19:46,309 INFO L231 Difference]: Finished difference. Result has 310 places, 538 transitions, 10589 flow [2024-06-27 23:19:46,309 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} [2024-06-27 23:19:46,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-27 23:19:46,310 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 538 transitions, 10589 flow [2024-06-27 23:19:46,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:46,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:46,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:19:46,310 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:46,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1351494588, now seen corresponding path program 13 times [2024-06-27 23:19:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336119501] [2024-06-27 23:19:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336119501] [2024-06-27 23:19:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336119501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:48,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:48,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:48,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125533496] [2024-06-27 23:19:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:48,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:48,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:48,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:48,222 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) [2024-06-27 23:19:48,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:48,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:48,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:50,391 INFO L124 PetriNetUnfolderBase]: 4905/7877 cut-off events. [2024-06-27 23:19:50,391 INFO L125 PetriNetUnfolderBase]: For 680138/680141 co-relation queries the response was YES. [2024-06-27 23:19:50,462 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. [2024-06-27 23:19:50,497 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 367 selfloop transitions, 207 changer transitions 0/579 dead transitions. [2024-06-27 23:19:50,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 579 transitions, 12047 flow [2024-06-27 23:19:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:19:50,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 23:19:50,499 INFO L175 Difference]: Start difference. First operand has 310 places, 538 transitions, 10589 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:19:50,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 579 transitions, 12047 flow [2024-06-27 23:19:52,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 579 transitions, 11518 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 23:19:52,030 INFO L231 Difference]: Finished difference. Result has 312 places, 539 transitions, 10536 flow [2024-06-27 23:19:52,030 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} [2024-06-27 23:19:52,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-27 23:19:52,030 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 539 transitions, 10536 flow [2024-06-27 23:19:52,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:52,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:52,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:19:52,031 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:19:52,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1351316958, now seen corresponding path program 14 times [2024-06-27 23:19:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419850316] [2024-06-27 23:19:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:53,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:53,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419850316] [2024-06-27 23:19:53,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419850316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:53,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:53,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:19:53,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200574656] [2024-06-27 23:19:53,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:53,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:19:53,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:19:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:19:53,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:19:53,668 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) [2024-06-27 23:19:53,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:53,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:19:53,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:19:56,002 INFO L124 PetriNetUnfolderBase]: 4877/7836 cut-off events. [2024-06-27 23:19:56,003 INFO L125 PetriNetUnfolderBase]: For 661669/661672 co-relation queries the response was YES. [2024-06-27 23:19:56,061 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. [2024-06-27 23:19:56,094 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 368 selfloop transitions, 213 changer transitions 0/586 dead transitions. [2024-06-27 23:19:56,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 586 transitions, 12031 flow [2024-06-27 23:19:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:19:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:19:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:19:56,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:19:56,095 INFO L175 Difference]: Start difference. First operand has 312 places, 539 transitions, 10536 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:19:56,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 586 transitions, 12031 flow [2024-06-27 23:19:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 586 transitions, 11539 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 23:19:57,493 INFO L231 Difference]: Finished difference. Result has 314 places, 542 transitions, 10572 flow [2024-06-27 23:19:57,494 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} [2024-06-27 23:19:57,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 23:19:57,494 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 542 transitions, 10572 flow [2024-06-27 23:19:57,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:19:57,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:19:57,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:19:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:19:57,495 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)] === [2024-06-27 23:19:57,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:19:57,495 INFO L85 PathProgramCache]: Analyzing trace with hash -859418883, now seen corresponding path program 3 times [2024-06-27 23:19:57,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:19:57,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732312065] [2024-06-27 23:19:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:19:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:19:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:19:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:19:58,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:19:58,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732312065] [2024-06-27 23:19:58,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732312065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:19:58,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:19:58,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:19:58,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324450473] [2024-06-27 23:19:58,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:19:58,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:19:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:19:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:19:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:19:58,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:19:58,507 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) [2024-06-27 23:19:58,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:19:58,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:19:58,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:00,283 INFO L124 PetriNetUnfolderBase]: 4506/7380 cut-off events. [2024-06-27 23:20:00,284 INFO L125 PetriNetUnfolderBase]: For 647339/647365 co-relation queries the response was YES. [2024-06-27 23:20:00,344 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. [2024-06-27 23:20:00,377 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 139 changer transitions 0/557 dead transitions. [2024-06-27 23:20:00,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 557 transitions, 11718 flow [2024-06-27 23:20:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:20:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:20:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:20:00,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:20:00,378 INFO L175 Difference]: Start difference. First operand has 314 places, 542 transitions, 10572 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:20:00,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 557 transitions, 11718 flow [2024-06-27 23:20:01,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 557 transitions, 11279 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 23:20:01,796 INFO L231 Difference]: Finished difference. Result has 316 places, 542 transitions, 10426 flow [2024-06-27 23:20:01,797 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} [2024-06-27 23:20:01,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-27 23:20:01,797 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 542 transitions, 10426 flow [2024-06-27 23:20:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:01,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:01,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:20:01,798 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)] === [2024-06-27 23:20:01,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 70174585, now seen corresponding path program 4 times [2024-06-27 23:20:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529367908] [2024-06-27 23:20:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:02,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:02,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529367908] [2024-06-27 23:20:02,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529367908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:02,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:02,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:20:02,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801175162] [2024-06-27 23:20:02,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:02,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:20:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:20:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:20:02,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:20:02,775 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) [2024-06-27 23:20:02,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:02,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:20:02,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:04,514 INFO L124 PetriNetUnfolderBase]: 4524/7407 cut-off events. [2024-06-27 23:20:04,514 INFO L125 PetriNetUnfolderBase]: For 657237/657263 co-relation queries the response was YES. [2024-06-27 23:20:04,583 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. [2024-06-27 23:20:04,618 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 387 selfloop transitions, 155 changer transitions 0/562 dead transitions. [2024-06-27 23:20:04,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 562 transitions, 11825 flow [2024-06-27 23:20:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:20:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:20:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:20:04,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:20:04,620 INFO L175 Difference]: Start difference. First operand has 316 places, 542 transitions, 10426 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:20:04,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 562 transitions, 11825 flow [2024-06-27 23:20:05,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 562 transitions, 11209 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-27 23:20:05,988 INFO L231 Difference]: Finished difference. Result has 314 places, 549 transitions, 10314 flow [2024-06-27 23:20:05,988 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} [2024-06-27 23:20:05,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 23:20:05,990 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 549 transitions, 10314 flow [2024-06-27 23:20:05,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:05,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:05,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:05,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:20:05,991 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)] === [2024-06-27 23:20:05,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash 616838415, now seen corresponding path program 5 times [2024-06-27 23:20:05,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:05,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788827756] [2024-06-27 23:20:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:05,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:07,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788827756] [2024-06-27 23:20:07,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788827756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:07,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:07,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:20:07,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602623419] [2024-06-27 23:20:07,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:07,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:20:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:20:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:20:07,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:20:07,134 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) [2024-06-27 23:20:07,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:07,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:20:07,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:08,779 INFO L124 PetriNetUnfolderBase]: 4529/7419 cut-off events. [2024-06-27 23:20:08,780 INFO L125 PetriNetUnfolderBase]: For 664968/664998 co-relation queries the response was YES. [2024-06-27 23:20:08,846 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. [2024-06-27 23:20:08,879 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 193 changer transitions 0/563 dead transitions. [2024-06-27 23:20:08,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 563 transitions, 11768 flow [2024-06-27 23:20:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:20:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:20:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:20:08,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 23:20:08,881 INFO L175 Difference]: Start difference. First operand has 314 places, 549 transitions, 10314 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:20:08,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 563 transitions, 11768 flow [2024-06-27 23:20:10,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 563 transitions, 11457 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:20:10,341 INFO L231 Difference]: Finished difference. Result has 317 places, 552 transitions, 10455 flow [2024-06-27 23:20:10,341 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} [2024-06-27 23:20:10,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-27 23:20:10,341 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 552 transitions, 10455 flow [2024-06-27 23:20:10,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:10,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:10,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:10,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:20:10,342 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)] === [2024-06-27 23:20:10,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash 611124495, now seen corresponding path program 6 times [2024-06-27 23:20:10,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:10,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308211945] [2024-06-27 23:20:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:11,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:11,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308211945] [2024-06-27 23:20:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308211945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:11,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:11,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:20:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214088478] [2024-06-27 23:20:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:11,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:20:11,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:20:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:20:11,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:20:11,535 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) [2024-06-27 23:20:11,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:11,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:20:11,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:13,137 INFO L124 PetriNetUnfolderBase]: 4521/7407 cut-off events. [2024-06-27 23:20:13,137 INFO L125 PetriNetUnfolderBase]: For 678421/678451 co-relation queries the response was YES. [2024-06-27 23:20:13,207 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. [2024-06-27 23:20:13,241 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 178 changer transitions 0/562 dead transitions. [2024-06-27 23:20:13,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 562 transitions, 11709 flow [2024-06-27 23:20:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:20:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:20:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:20:13,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 23:20:13,242 INFO L175 Difference]: Start difference. First operand has 317 places, 552 transitions, 10455 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:20:13,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 562 transitions, 11709 flow [2024-06-27 23:20:14,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 562 transitions, 11224 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 23:20:14,735 INFO L231 Difference]: Finished difference. Result has 319 places, 552 transitions, 10334 flow [2024-06-27 23:20:14,736 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} [2024-06-27 23:20:14,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-27 23:20:14,736 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 552 transitions, 10334 flow [2024-06-27 23:20:14,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:14,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:14,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:14,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:20:14,737 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:14,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:14,737 INFO L85 PathProgramCache]: Analyzing trace with hash 719578180, now seen corresponding path program 1 times [2024-06-27 23:20:14,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:14,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147363844] [2024-06-27 23:20:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:14,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:16,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147363844] [2024-06-27 23:20:16,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147363844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:16,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:16,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:20:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462848731] [2024-06-27 23:20:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:16,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:20:16,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:20:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:20:16,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:16,974 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) [2024-06-27 23:20:16,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:16,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:16,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:19,258 INFO L124 PetriNetUnfolderBase]: 4924/7869 cut-off events. [2024-06-27 23:20:19,259 INFO L125 PetriNetUnfolderBase]: For 702331/702331 co-relation queries the response was YES. [2024-06-27 23:20:19,331 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. [2024-06-27 23:20:19,368 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 341 selfloop transitions, 250 changer transitions 0/596 dead transitions. [2024-06-27 23:20:19,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 596 transitions, 11870 flow [2024-06-27 23:20:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:20:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:20:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 23:20:19,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:20:19,370 INFO L175 Difference]: Start difference. First operand has 319 places, 552 transitions, 10334 flow. Second operand 11 states and 209 transitions. [2024-06-27 23:20:19,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 596 transitions, 11870 flow [2024-06-27 23:20:20,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 596 transitions, 11498 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:20:20,764 INFO L231 Difference]: Finished difference. Result has 324 places, 561 transitions, 10667 flow [2024-06-27 23:20:20,764 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} [2024-06-27 23:20:20,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-27 23:20:20,765 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 561 transitions, 10667 flow [2024-06-27 23:20:20,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:20,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:20,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:20,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:20:20,765 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:20,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1157247366, now seen corresponding path program 2 times [2024-06-27 23:20:20,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:20,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758143343] [2024-06-27 23:20:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:20,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:22,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758143343] [2024-06-27 23:20:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758143343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:22,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:22,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:20:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937867610] [2024-06-27 23:20:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:20:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:22,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:20:22,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:20:22,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:22,885 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) [2024-06-27 23:20:22,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:22,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:22,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:25,110 INFO L124 PetriNetUnfolderBase]: 4983/7968 cut-off events. [2024-06-27 23:20:25,110 INFO L125 PetriNetUnfolderBase]: For 745046/745046 co-relation queries the response was YES. [2024-06-27 23:20:25,191 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. [2024-06-27 23:20:25,229 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 346 selfloop transitions, 289 changer transitions 0/640 dead transitions. [2024-06-27 23:20:25,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 640 transitions, 13144 flow [2024-06-27 23:20:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:20:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:20:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2024-06-27 23:20:25,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329159212880143 [2024-06-27 23:20:25,230 INFO L175 Difference]: Start difference. First operand has 324 places, 561 transitions, 10667 flow. Second operand 13 states and 242 transitions. [2024-06-27 23:20:25,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 640 transitions, 13144 flow [2024-06-27 23:20:26,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 640 transitions, 12534 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 23:20:26,843 INFO L231 Difference]: Finished difference. Result has 332 places, 602 transitions, 11608 flow [2024-06-27 23:20:26,843 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} [2024-06-27 23:20:26,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 23:20:26,843 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 602 transitions, 11608 flow [2024-06-27 23:20:26,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:26,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:26,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:26,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:20:26,844 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:26,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash -773601508, now seen corresponding path program 3 times [2024-06-27 23:20:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:26,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840153459] [2024-06-27 23:20:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:26,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:28,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:28,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840153459] [2024-06-27 23:20:28,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840153459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:28,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:28,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:20:28,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389130711] [2024-06-27 23:20:28,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:20:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:20:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:20:28,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:28,931 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) [2024-06-27 23:20:28,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:28,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:28,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:31,301 INFO L124 PetriNetUnfolderBase]: 5000/7995 cut-off events. [2024-06-27 23:20:31,301 INFO L125 PetriNetUnfolderBase]: For 777668/777668 co-relation queries the response was YES. [2024-06-27 23:20:31,384 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. [2024-06-27 23:20:31,425 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 367 selfloop transitions, 268 changer transitions 0/640 dead transitions. [2024-06-27 23:20:31,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 640 transitions, 13158 flow [2024-06-27 23:20:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:20:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:20:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 23:20:31,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:20:31,427 INFO L175 Difference]: Start difference. First operand has 332 places, 602 transitions, 11608 flow. Second operand 11 states and 209 transitions. [2024-06-27 23:20:31,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 640 transitions, 13158 flow [2024-06-27 23:20:33,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 640 transitions, 12542 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-27 23:20:33,161 INFO L231 Difference]: Finished difference. Result has 338 places, 605 transitions, 11634 flow [2024-06-27 23:20:33,161 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} [2024-06-27 23:20:33,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 23:20:33,162 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 605 transitions, 11634 flow [2024-06-27 23:20:33,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:33,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:33,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:33,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:20:33,162 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)] === [2024-06-27 23:20:33,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1146771846, now seen corresponding path program 4 times [2024-06-27 23:20:33,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:33,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203010074] [2024-06-27 23:20:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:33,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:35,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203010074] [2024-06-27 23:20:35,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203010074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:35,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:35,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:20:35,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725247820] [2024-06-27 23:20:35,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:35,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:20:35,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:20:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:20:35,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:35,188 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) [2024-06-27 23:20:35,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:35,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:35,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:37,789 INFO L124 PetriNetUnfolderBase]: 5144/8245 cut-off events. [2024-06-27 23:20:37,789 INFO L125 PetriNetUnfolderBase]: For 830136/830136 co-relation queries the response was YES. [2024-06-27 23:20:37,855 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. [2024-06-27 23:20:37,892 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 355 selfloop transitions, 293 changer transitions 0/653 dead transitions. [2024-06-27 23:20:37,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 653 transitions, 13563 flow [2024-06-27 23:20:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:20:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:20:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 23:20:37,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:20:37,894 INFO L175 Difference]: Start difference. First operand has 338 places, 605 transitions, 11634 flow. Second operand 11 states and 215 transitions. [2024-06-27 23:20:37,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 653 transitions, 13563 flow [2024-06-27 23:20:39,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 653 transitions, 12432 flow, removed 39 selfloop flow, removed 13 redundant places. [2024-06-27 23:20:39,596 INFO L231 Difference]: Finished difference. Result has 337 places, 612 transitions, 11328 flow [2024-06-27 23:20:39,596 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} [2024-06-27 23:20:39,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-27 23:20:39,597 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 612 transitions, 11328 flow [2024-06-27 23:20:39,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:39,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:39,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:39,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:20:39,597 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:39,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:39,598 INFO L85 PathProgramCache]: Analyzing trace with hash -803928454, now seen corresponding path program 5 times [2024-06-27 23:20:39,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:39,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42778839] [2024-06-27 23:20:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:39,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42778839] [2024-06-27 23:20:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42778839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:20:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208961363] [2024-06-27 23:20:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:41,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:20:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:41,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:20:41,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:20:41,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:20:41,730 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) [2024-06-27 23:20:41,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:41,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:20:41,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:44,052 INFO L124 PetriNetUnfolderBase]: 5136/8225 cut-off events. [2024-06-27 23:20:44,052 INFO L125 PetriNetUnfolderBase]: For 826094/826094 co-relation queries the response was YES. [2024-06-27 23:20:44,143 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. [2024-06-27 23:20:44,186 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 373 selfloop transitions, 271 changer transitions 0/649 dead transitions. [2024-06-27 23:20:44,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 649 transitions, 12862 flow [2024-06-27 23:20:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:20:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:20:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 23:20:44,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:20:44,188 INFO L175 Difference]: Start difference. First operand has 337 places, 612 transitions, 11328 flow. Second operand 11 states and 209 transitions. [2024-06-27 23:20:44,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 649 transitions, 12862 flow [2024-06-27 23:20:46,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 649 transitions, 12494 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 23:20:46,220 INFO L231 Difference]: Finished difference. Result has 344 places, 614 transitions, 11569 flow [2024-06-27 23:20:46,233 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} [2024-06-27 23:20:46,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 23:20:46,234 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 614 transitions, 11569 flow [2024-06-27 23:20:46,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:46,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:46,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:46,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:20:46,234 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:46,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:46,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1315281845, now seen corresponding path program 2 times [2024-06-27 23:20:46,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:46,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699099650] [2024-06-27 23:20:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:46,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:48,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:48,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699099650] [2024-06-27 23:20:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699099650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:48,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:48,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:20:48,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442998184] [2024-06-27 23:20:48,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:48,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:20:48,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:20:48,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:20:48,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:20:48,848 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) [2024-06-27 23:20:48,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:48,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:20:48,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:51,030 INFO L124 PetriNetUnfolderBase]: 4769/7858 cut-off events. [2024-06-27 23:20:51,030 INFO L125 PetriNetUnfolderBase]: For 835465/835495 co-relation queries the response was YES. [2024-06-27 23:20:51,115 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. [2024-06-27 23:20:51,154 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 591 selfloop transitions, 19 changer transitions 0/630 dead transitions. [2024-06-27 23:20:51,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 630 transitions, 12915 flow [2024-06-27 23:20:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 23:20:51,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-27 23:20:51,156 INFO L175 Difference]: Start difference. First operand has 344 places, 614 transitions, 11569 flow. Second operand 9 states and 154 transitions. [2024-06-27 23:20:51,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 630 transitions, 12915 flow [2024-06-27 23:20:53,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 630 transitions, 12180 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-27 23:20:53,138 INFO L231 Difference]: Finished difference. Result has 343 places, 620 transitions, 10988 flow [2024-06-27 23:20:53,139 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} [2024-06-27 23:20:53,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-27 23:20:53,139 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 620 transitions, 10988 flow [2024-06-27 23:20:53,139 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) [2024-06-27 23:20:53,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:53,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:53,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:20:53,140 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:53,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash 625866080, now seen corresponding path program 4 times [2024-06-27 23:20:53,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667147491] [2024-06-27 23:20:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:53,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:20:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:20:55,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:20:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667147491] [2024-06-27 23:20:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667147491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:20:55,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:20:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:20:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549461041] [2024-06-27 23:20:55,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:20:55,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:20:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:20:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:20:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:20:55,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:20:55,360 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) [2024-06-27 23:20:55,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:20:55,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:20:55,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:20:57,243 INFO L124 PetriNetUnfolderBase]: 4810/7908 cut-off events. [2024-06-27 23:20:57,243 INFO L125 PetriNetUnfolderBase]: For 859003/859033 co-relation queries the response was YES. [2024-06-27 23:20:57,324 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. [2024-06-27 23:20:57,365 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 414 selfloop transitions, 212 changer transitions 0/646 dead transitions. [2024-06-27 23:20:57,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 646 transitions, 13090 flow [2024-06-27 23:20:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:20:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:20:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:20:57,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:20:57,366 INFO L175 Difference]: Start difference. First operand has 343 places, 620 transitions, 10988 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:20:57,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 646 transitions, 13090 flow [2024-06-27 23:20:59,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 646 transitions, 12956 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 23:20:59,479 INFO L231 Difference]: Finished difference. Result has 348 places, 631 transitions, 11573 flow [2024-06-27 23:20:59,480 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} [2024-06-27 23:20:59,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-27 23:20:59,480 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 631 transitions, 11573 flow [2024-06-27 23:20:59,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:20:59,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:20:59,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:20:59,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:20:59,481 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:20:59,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:20:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1315266965, now seen corresponding path program 3 times [2024-06-27 23:20:59,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:20:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123272415] [2024-06-27 23:20:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:20:59,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:20:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:01,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123272415] [2024-06-27 23:21:01,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123272415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:01,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:01,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:21:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761219064] [2024-06-27 23:21:01,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:01,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:21:01,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:21:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:21:01,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:21:01,230 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) [2024-06-27 23:21:01,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:01,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:21:01,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:03,028 INFO L124 PetriNetUnfolderBase]: 4823/7942 cut-off events. [2024-06-27 23:21:03,029 INFO L125 PetriNetUnfolderBase]: For 890534/890570 co-relation queries the response was YES. [2024-06-27 23:21:03,113 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. [2024-06-27 23:21:03,153 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 574 selfloop transitions, 59 changer transitions 0/654 dead transitions. [2024-06-27 23:21:03,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 654 transitions, 13471 flow [2024-06-27 23:21:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:21:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:21:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 23:21:03,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-27 23:21:03,154 INFO L175 Difference]: Start difference. First operand has 348 places, 631 transitions, 11573 flow. Second operand 7 states and 154 transitions. [2024-06-27 23:21:03,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 654 transitions, 13471 flow [2024-06-27 23:21:05,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 654 transitions, 13096 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-27 23:21:05,489 INFO L231 Difference]: Finished difference. Result has 351 places, 640 transitions, 11598 flow [2024-06-27 23:21:05,489 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} [2024-06-27 23:21:05,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-27 23:21:05,491 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 640 transitions, 11598 flow [2024-06-27 23:21:05,491 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) [2024-06-27 23:21:05,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:05,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:05,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:21:05,491 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:05,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash 611134415, now seen corresponding path program 4 times [2024-06-27 23:21:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:05,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405335350] [2024-06-27 23:21:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:05,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405335350] [2024-06-27 23:21:07,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405335350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:07,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:07,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272413253] [2024-06-27 23:21:07,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:07,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:07,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:21:07,419 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) [2024-06-27 23:21:07,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:07,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:21:07,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:09,298 INFO L124 PetriNetUnfolderBase]: 4817/7942 cut-off events. [2024-06-27 23:21:09,299 INFO L125 PetriNetUnfolderBase]: For 897368/897404 co-relation queries the response was YES. [2024-06-27 23:21:09,381 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. [2024-06-27 23:21:09,421 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 596 selfloop transitions, 35 changer transitions 0/651 dead transitions. [2024-06-27 23:21:09,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 651 transitions, 12896 flow [2024-06-27 23:21:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:21:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:21:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:21:09,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 23:21:09,422 INFO L175 Difference]: Start difference. First operand has 351 places, 640 transitions, 11598 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:21:09,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 651 transitions, 12896 flow [2024-06-27 23:21:11,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 651 transitions, 12701 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-27 23:21:11,697 INFO L231 Difference]: Finished difference. Result has 357 places, 640 transitions, 11479 flow [2024-06-27 23:21:11,698 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} [2024-06-27 23:21:11,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-27 23:21:11,698 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 640 transitions, 11479 flow [2024-06-27 23:21:11,699 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) [2024-06-27 23:21:11,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:11,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:11,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:21:11,699 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:11,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1300521350, now seen corresponding path program 5 times [2024-06-27 23:21:11,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:11,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191819527] [2024-06-27 23:21:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:13,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191819527] [2024-06-27 23:21:13,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191819527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:13,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:13,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:13,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238219590] [2024-06-27 23:21:13,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:13,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:13,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:13,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:13,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:21:13,356 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) [2024-06-27 23:21:13,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:13,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:21:13,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:15,446 INFO L124 PetriNetUnfolderBase]: 4835/7954 cut-off events. [2024-06-27 23:21:15,446 INFO L125 PetriNetUnfolderBase]: For 915783/915813 co-relation queries the response was YES. [2024-06-27 23:21:15,523 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. [2024-06-27 23:21:15,564 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 451 selfloop transitions, 184 changer transitions 0/655 dead transitions. [2024-06-27 23:21:15,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 655 transitions, 13045 flow [2024-06-27 23:21:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:21:15,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 23:21:15,567 INFO L175 Difference]: Start difference. First operand has 357 places, 640 transitions, 11479 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:21:15,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 655 transitions, 13045 flow [2024-06-27 23:21:17,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 655 transitions, 12933 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 23:21:17,350 INFO L231 Difference]: Finished difference. Result has 359 places, 644 transitions, 11852 flow [2024-06-27 23:21:17,350 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} [2024-06-27 23:21:17,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 23:21:17,351 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 644 transitions, 11852 flow [2024-06-27 23:21:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:17,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:17,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:17,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:21:17,352 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:17,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 611133950, now seen corresponding path program 6 times [2024-06-27 23:21:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632244907] [2024-06-27 23:21:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:18,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:18,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632244907] [2024-06-27 23:21:18,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632244907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:18,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:18,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:21:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718643850] [2024-06-27 23:21:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:18,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:21:18,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:18,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:21:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:21:19,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:21:19,007 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) [2024-06-27 23:21:19,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:19,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:21:19,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:21,076 INFO L124 PetriNetUnfolderBase]: 4872/8012 cut-off events. [2024-06-27 23:21:21,076 INFO L125 PetriNetUnfolderBase]: For 949152/949182 co-relation queries the response was YES. [2024-06-27 23:21:21,171 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. [2024-06-27 23:21:21,217 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 456 selfloop transitions, 188 changer transitions 0/664 dead transitions. [2024-06-27 23:21:21,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 664 transitions, 13712 flow [2024-06-27 23:21:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:21:21,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 23:21:21,218 INFO L175 Difference]: Start difference. First operand has 359 places, 644 transitions, 11852 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:21:21,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 664 transitions, 13712 flow [2024-06-27 23:21:23,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 664 transitions, 13261 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 23:21:23,413 INFO L231 Difference]: Finished difference. Result has 362 places, 652 transitions, 12020 flow [2024-06-27 23:21:23,413 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} [2024-06-27 23:21:23,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 23:21:23,414 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 652 transitions, 12020 flow [2024-06-27 23:21:23,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:23,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:23,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:23,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:21:23,414 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:23,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:23,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1523710416, now seen corresponding path program 15 times [2024-06-27 23:21:23,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:23,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216224070] [2024-06-27 23:21:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:24,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216224070] [2024-06-27 23:21:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216224070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:24,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:24,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:24,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77890360] [2024-06-27 23:21:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:24,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:24,919 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) [2024-06-27 23:21:24,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:24,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:24,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:27,492 INFO L124 PetriNetUnfolderBase]: 6170/9996 cut-off events. [2024-06-27 23:21:27,492 INFO L125 PetriNetUnfolderBase]: For 1092040/1092043 co-relation queries the response was YES. [2024-06-27 23:21:27,610 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. [2024-06-27 23:21:27,660 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 473 selfloop transitions, 259 changer transitions 0/737 dead transitions. [2024-06-27 23:21:27,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 737 transitions, 14434 flow [2024-06-27 23:21:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:21:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:21:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:21:27,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-27 23:21:27,661 INFO L175 Difference]: Start difference. First operand has 362 places, 652 transitions, 12020 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:21:27,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 737 transitions, 14434 flow [2024-06-27 23:21:30,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 737 transitions, 14089 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 23:21:30,661 INFO L231 Difference]: Finished difference. Result has 369 places, 677 transitions, 12759 flow [2024-06-27 23:21:30,662 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} [2024-06-27 23:21:30,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-27 23:21:30,662 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 677 transitions, 12759 flow [2024-06-27 23:21:30,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:30,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:30,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:30,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:21:30,663 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:30,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash -653991098, now seen corresponding path program 16 times [2024-06-27 23:21:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:30,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585283020] [2024-06-27 23:21:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:30,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:32,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:32,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585283020] [2024-06-27 23:21:32,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585283020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:32,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:32,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:32,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813024390] [2024-06-27 23:21:32,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:32,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:32,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:32,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:32,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:32,120 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) [2024-06-27 23:21:32,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:32,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:32,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:35,250 INFO L124 PetriNetUnfolderBase]: 6279/10189 cut-off events. [2024-06-27 23:21:35,250 INFO L125 PetriNetUnfolderBase]: For 1130166/1130169 co-relation queries the response was YES. [2024-06-27 23:21:35,345 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. [2024-06-27 23:21:35,391 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 482 selfloop transitions, 238 changer transitions 0/725 dead transitions. [2024-06-27 23:21:35,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 725 transitions, 14511 flow [2024-06-27 23:21:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:21:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:21:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 23:21:35,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48372093023255813 [2024-06-27 23:21:35,394 INFO L175 Difference]: Start difference. First operand has 369 places, 677 transitions, 12759 flow. Second operand 10 states and 208 transitions. [2024-06-27 23:21:35,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 725 transitions, 14511 flow [2024-06-27 23:21:37,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 725 transitions, 14217 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:21:37,985 INFO L231 Difference]: Finished difference. Result has 374 places, 681 transitions, 13056 flow [2024-06-27 23:21:37,986 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} [2024-06-27 23:21:37,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-27 23:21:37,986 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 681 transitions, 13056 flow [2024-06-27 23:21:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:37,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:37,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:37,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:21:37,987 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:37,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash 210057616, now seen corresponding path program 17 times [2024-06-27 23:21:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163787751] [2024-06-27 23:21:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:37,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:39,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163787751] [2024-06-27 23:21:39,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163787751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:39,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:39,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:39,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117806121] [2024-06-27 23:21:39,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:39,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:39,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:39,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:39,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:39,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:39,520 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) [2024-06-27 23:21:39,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:39,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:39,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:42,563 INFO L124 PetriNetUnfolderBase]: 6392/10392 cut-off events. [2024-06-27 23:21:42,563 INFO L125 PetriNetUnfolderBase]: For 1106331/1106334 co-relation queries the response was YES. [2024-06-27 23:21:42,681 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. [2024-06-27 23:21:42,733 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 486 selfloop transitions, 242 changer transitions 0/733 dead transitions. [2024-06-27 23:21:42,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 733 transitions, 14828 flow [2024-06-27 23:21:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:21:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:21:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 23:21:42,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906976744186046 [2024-06-27 23:21:42,734 INFO L175 Difference]: Start difference. First operand has 374 places, 681 transitions, 13056 flow. Second operand 10 states and 211 transitions. [2024-06-27 23:21:42,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 733 transitions, 14828 flow [2024-06-27 23:21:45,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 733 transitions, 14336 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 23:21:45,340 INFO L231 Difference]: Finished difference. Result has 377 places, 685 transitions, 13159 flow [2024-06-27 23:21:45,341 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} [2024-06-27 23:21:45,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-27 23:21:45,341 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 685 transitions, 13159 flow [2024-06-27 23:21:45,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:45,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:45,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:45,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:21:45,342 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:21:45,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2081993188, now seen corresponding path program 18 times [2024-06-27 23:21:45,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:45,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749847660] [2024-06-27 23:21:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:46,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:46,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749847660] [2024-06-27 23:21:46,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749847660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:46,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:46,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:21:46,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816233767] [2024-06-27 23:21:46,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:21:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:21:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:21:46,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:21:46,994 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) [2024-06-27 23:21:46,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:46,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:21:46,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:50,000 INFO L124 PetriNetUnfolderBase]: 6488/10565 cut-off events. [2024-06-27 23:21:50,000 INFO L125 PetriNetUnfolderBase]: For 1132958/1132961 co-relation queries the response was YES. [2024-06-27 23:21:50,135 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. [2024-06-27 23:21:50,190 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 486 selfloop transitions, 248 changer transitions 0/739 dead transitions. [2024-06-27 23:21:50,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 739 transitions, 14956 flow [2024-06-27 23:21:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:21:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:21:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:21:50,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-27 23:21:50,192 INFO L175 Difference]: Start difference. First operand has 377 places, 685 transitions, 13159 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:21:50,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 739 transitions, 14956 flow [2024-06-27 23:21:53,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 739 transitions, 14468 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 23:21:53,374 INFO L231 Difference]: Finished difference. Result has 381 places, 690 transitions, 13295 flow [2024-06-27 23:21:53,374 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} [2024-06-27 23:21:53,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-27 23:21:53,374 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 690 transitions, 13295 flow [2024-06-27 23:21:53,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:21:53,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:21:53,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:21:53,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:21:53,375 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)] === [2024-06-27 23:21:53,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:21:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1888366104, now seen corresponding path program 19 times [2024-06-27 23:21:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:21:53,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205990929] [2024-06-27 23:21:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:21:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:21:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:21:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:21:54,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:21:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205990929] [2024-06-27 23:21:54,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205990929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:21:54,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:21:54,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:21:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212606522] [2024-06-27 23:21:54,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:21:54,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:21:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:21:54,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:21:54,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:21:54,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:21:54,695 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) [2024-06-27 23:21:54,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:21:54,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:21:54,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:21:57,860 INFO L124 PetriNetUnfolderBase]: 6086/10739 cut-off events. [2024-06-27 23:21:57,860 INFO L125 PetriNetUnfolderBase]: For 1198461/1198662 co-relation queries the response was YES. [2024-06-27 23:21:57,988 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. [2024-06-27 23:21:58,042 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 351 selfloop transitions, 273 changer transitions 0/771 dead transitions. [2024-06-27 23:21:58,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 771 transitions, 15726 flow [2024-06-27 23:21:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:21:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:21:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 23:21:58,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-27 23:21:58,044 INFO L175 Difference]: Start difference. First operand has 381 places, 690 transitions, 13295 flow. Second operand 9 states and 207 transitions. [2024-06-27 23:21:58,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 771 transitions, 15726 flow [2024-06-27 23:22:00,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 771 transitions, 15222 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 23:22:00,649 INFO L231 Difference]: Finished difference. Result has 386 places, 718 transitions, 13953 flow [2024-06-27 23:22:00,649 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} [2024-06-27 23:22:00,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-27 23:22:00,650 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 718 transitions, 13953 flow [2024-06-27 23:22:00,650 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) [2024-06-27 23:22:00,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:00,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:00,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:22:00,650 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:00,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:00,651 INFO L85 PathProgramCache]: Analyzing trace with hash 574930680, now seen corresponding path program 7 times [2024-06-27 23:22:00,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:00,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105241303] [2024-06-27 23:22:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:00,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:01,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105241303] [2024-06-27 23:22:01,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105241303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:01,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:01,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672925874] [2024-06-27 23:22:01,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:01,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:01,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:01,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:01,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:02,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:22:02,080 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) [2024-06-27 23:22:02,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:02,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:22:02,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:05,267 INFO L124 PetriNetUnfolderBase]: 6944/11635 cut-off events. [2024-06-27 23:22:05,267 INFO L125 PetriNetUnfolderBase]: For 1183998/1184030 co-relation queries the response was YES. [2024-06-27 23:22:05,384 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. [2024-06-27 23:22:05,437 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 570 selfloop transitions, 154 changer transitions 0/750 dead transitions. [2024-06-27 23:22:05,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 750 transitions, 15638 flow [2024-06-27 23:22:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:22:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:22:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 23:22:05,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:22:05,438 INFO L175 Difference]: Start difference. First operand has 386 places, 718 transitions, 13953 flow. Second operand 9 states and 180 transitions. [2024-06-27 23:22:05,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 750 transitions, 15638 flow [2024-06-27 23:22:08,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 750 transitions, 15280 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 23:22:08,254 INFO L231 Difference]: Finished difference. Result has 390 places, 726 transitions, 14081 flow [2024-06-27 23:22:08,254 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} [2024-06-27 23:22:08,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-27 23:22:08,255 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 726 transitions, 14081 flow [2024-06-27 23:22:08,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:08,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:08,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:08,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:22:08,255 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)] === [2024-06-27 23:22:08,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1367883912, now seen corresponding path program 20 times [2024-06-27 23:22:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:08,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559761949] [2024-06-27 23:22:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:09,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:09,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559761949] [2024-06-27 23:22:09,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559761949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:09,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:09,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:09,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586158184] [2024-06-27 23:22:09,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:09,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:09,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:09,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:10,000 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) [2024-06-27 23:22:10,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:10,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:10,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:14,041 INFO L124 PetriNetUnfolderBase]: 8012/13201 cut-off events. [2024-06-27 23:22:14,041 INFO L125 PetriNetUnfolderBase]: For 1298953/1298958 co-relation queries the response was YES. [2024-06-27 23:22:14,477 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. [2024-06-27 23:22:14,535 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 531 selfloop transitions, 271 changer transitions 0/807 dead transitions. [2024-06-27 23:22:14,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 807 transitions, 16779 flow [2024-06-27 23:22:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:22:14,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2024-06-27 23:22:14,537 INFO L175 Difference]: Start difference. First operand has 390 places, 726 transitions, 14081 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:22:14,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 807 transitions, 16779 flow [2024-06-27 23:22:17,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 807 transitions, 16392 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 23:22:17,093 INFO L231 Difference]: Finished difference. Result has 395 places, 751 transitions, 14860 flow [2024-06-27 23:22:17,094 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} [2024-06-27 23:22:17,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-27 23:22:17,094 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 751 transitions, 14860 flow [2024-06-27 23:22:17,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:17,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:17,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:17,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:22:17,095 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:17,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:17,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1372645512, now seen corresponding path program 21 times [2024-06-27 23:22:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:17,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924611058] [2024-06-27 23:22:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:17,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:18,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:18,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924611058] [2024-06-27 23:22:18,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924611058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:18,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:18,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:18,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061736103] [2024-06-27 23:22:18,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:18,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:18,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:18,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:18,681 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) [2024-06-27 23:22:18,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:18,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:18,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:23,164 INFO L124 PetriNetUnfolderBase]: 8087/13326 cut-off events. [2024-06-27 23:22:23,165 INFO L125 PetriNetUnfolderBase]: For 1351770/1351775 co-relation queries the response was YES. [2024-06-27 23:22:23,317 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. [2024-06-27 23:22:23,378 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 540 selfloop transitions, 253 changer transitions 0/798 dead transitions. [2024-06-27 23:22:23,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 798 transitions, 16727 flow [2024-06-27 23:22:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 23:22:23,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-27 23:22:23,380 INFO L175 Difference]: Start difference. First operand has 395 places, 751 transitions, 14860 flow. Second operand 10 states and 209 transitions. [2024-06-27 23:22:23,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 798 transitions, 16727 flow [2024-06-27 23:22:26,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 798 transitions, 16387 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 23:22:26,520 INFO L231 Difference]: Finished difference. Result has 400 places, 752 transitions, 15085 flow [2024-06-27 23:22:26,520 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} [2024-06-27 23:22:26,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-27 23:22:26,520 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 752 transitions, 15085 flow [2024-06-27 23:22:26,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:26,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:26,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:26,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:22:26,521 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:26,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1538879292, now seen corresponding path program 22 times [2024-06-27 23:22:26,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:26,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176348738] [2024-06-27 23:22:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:27,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:27,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176348738] [2024-06-27 23:22:27,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176348738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:27,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:27,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:27,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829677610] [2024-06-27 23:22:27,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:27,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:28,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:28,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 752 transitions, 15085 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:28,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:28,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:28,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:32,614 INFO L124 PetriNetUnfolderBase]: 8211/13536 cut-off events. [2024-06-27 23:22:32,614 INFO L125 PetriNetUnfolderBase]: For 1380579/1380582 co-relation queries the response was YES. [2024-06-27 23:22:32,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114309 conditions, 13536 events. 8211/13536 cut-off events. For 1380579/1380582 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 100454 event pairs, 2014 based on Foata normal form. 20/13552 useless extension candidates. Maximal degree in co-relation 114115. Up to 11596 conditions per place. [2024-06-27 23:22:32,848 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 562 selfloop transitions, 237 changer transitions 0/804 dead transitions. [2024-06-27 23:22:32,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 804 transitions, 17032 flow [2024-06-27 23:22:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 23:22:32,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-27 23:22:32,850 INFO L175 Difference]: Start difference. First operand has 400 places, 752 transitions, 15085 flow. Second operand 10 states and 209 transitions. [2024-06-27 23:22:32,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 804 transitions, 17032 flow [2024-06-27 23:22:36,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 804 transitions, 16650 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 23:22:36,675 INFO L231 Difference]: Finished difference. Result has 405 places, 754 transitions, 15262 flow [2024-06-27 23:22:36,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14703, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15262, PETRI_PLACES=405, PETRI_TRANSITIONS=754} [2024-06-27 23:22:36,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 23:22:36,676 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 754 transitions, 15262 flow [2024-06-27 23:22:36,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:36,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:36,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:22:36,676 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:36,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:36,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1367999232, now seen corresponding path program 23 times [2024-06-27 23:22:36,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:36,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827053764] [2024-06-27 23:22:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:36,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:38,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827053764] [2024-06-27 23:22:38,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827053764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:38,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:38,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:38,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610936100] [2024-06-27 23:22:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:38,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:38,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:38,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:38,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 754 transitions, 15262 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:38,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:38,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:38,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:43,064 INFO L124 PetriNetUnfolderBase]: 8286/13675 cut-off events. [2024-06-27 23:22:43,064 INFO L125 PetriNetUnfolderBase]: For 1402125/1402130 co-relation queries the response was YES. [2024-06-27 23:22:43,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115318 conditions, 13675 events. 8286/13675 cut-off events. For 1402125/1402130 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 101832 event pairs, 2029 based on Foata normal form. 18/13689 useless extension candidates. Maximal degree in co-relation 115123. Up to 11546 conditions per place. [2024-06-27 23:22:43,318 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 548 selfloop transitions, 256 changer transitions 0/809 dead transitions. [2024-06-27 23:22:43,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 809 transitions, 17227 flow [2024-06-27 23:22:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 23:22:43,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49534883720930234 [2024-06-27 23:22:43,319 INFO L175 Difference]: Start difference. First operand has 405 places, 754 transitions, 15262 flow. Second operand 10 states and 213 transitions. [2024-06-27 23:22:43,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 809 transitions, 17227 flow [2024-06-27 23:22:46,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 809 transitions, 16718 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 23:22:46,720 INFO L231 Difference]: Finished difference. Result has 407 places, 758 transitions, 15389 flow [2024-06-27 23:22:46,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14753, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15389, PETRI_PLACES=407, PETRI_TRANSITIONS=758} [2024-06-27 23:22:46,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-27 23:22:46,721 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 758 transitions, 15389 flow [2024-06-27 23:22:46,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:46,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:46,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:46,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:22:46,722 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:46,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1538701662, now seen corresponding path program 24 times [2024-06-27 23:22:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:46,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078464597] [2024-06-27 23:22:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:48,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:48,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078464597] [2024-06-27 23:22:48,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078464597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:48,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:48,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:48,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644061324] [2024-06-27 23:22:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:48,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:48,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:48,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:48,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 758 transitions, 15389 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:48,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:48,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:48,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:22:53,229 INFO L124 PetriNetUnfolderBase]: 8442/13933 cut-off events. [2024-06-27 23:22:53,230 INFO L125 PetriNetUnfolderBase]: For 1433109/1433112 co-relation queries the response was YES. [2024-06-27 23:22:53,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117213 conditions, 13933 events. 8442/13933 cut-off events. For 1433109/1433112 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 104065 event pairs, 2026 based on Foata normal form. 16/13945 useless extension candidates. Maximal degree in co-relation 117016. Up to 11568 conditions per place. [2024-06-27 23:22:53,489 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 572 selfloop transitions, 242 changer transitions 0/819 dead transitions. [2024-06-27 23:22:53,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 819 transitions, 17762 flow [2024-06-27 23:22:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:22:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:22:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 23:22:53,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49534883720930234 [2024-06-27 23:22:53,491 INFO L175 Difference]: Start difference. First operand has 407 places, 758 transitions, 15389 flow. Second operand 10 states and 213 transitions. [2024-06-27 23:22:53,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 819 transitions, 17762 flow [2024-06-27 23:22:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 819 transitions, 17231 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:22:57,563 INFO L231 Difference]: Finished difference. Result has 411 places, 764 transitions, 15534 flow [2024-06-27 23:22:57,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14858, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15534, PETRI_PLACES=411, PETRI_TRANSITIONS=764} [2024-06-27 23:22:57,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-27 23:22:57,564 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 764 transitions, 15534 flow [2024-06-27 23:22:57,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:57,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:22:57,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:22:57,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:22:57,565 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:22:57,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:22:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1545135402, now seen corresponding path program 25 times [2024-06-27 23:22:57,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:22:57,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775617026] [2024-06-27 23:22:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:22:57,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:22:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:22:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:22:59,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:22:59,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775617026] [2024-06-27 23:22:59,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775617026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:22:59,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:22:59,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:22:59,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667654604] [2024-06-27 23:22:59,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:22:59,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:22:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:22:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:22:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:22:59,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:22:59,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 764 transitions, 15534 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:22:59,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:22:59,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:22:59,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand