./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038.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/mix038.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/mix038.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038.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 23:46:24,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:46:24,196 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:46:24,200 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:46:24,201 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:46:24,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:46:24,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:46:24,224 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:46:24,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:46:24,229 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:46:24,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:46:24,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:46:24,231 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:46:24,232 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:46:24,232 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:46:24,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:46:24,233 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:46:24,233 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:46:24,233 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:46:24,233 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:46:24,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:46:24,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:46:24,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:46:24,235 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:46:24,236 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:46:24,236 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:46:24,236 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:46:24,236 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:46:24,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:46:24,237 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:46:24,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:46:24,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:46:24,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:46:24,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:46:24,239 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:46:24,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:46:24,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:46:24,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:46:24,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:46:24,240 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:46:24,240 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:46:24,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:46:24,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:46:24,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:46:24,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:46:24,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:46:24,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:46:24,479 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:46:24,480 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:46:24,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038.opt.yml/witness.yml [2024-06-27 23:46:24,562 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:46:24,565 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:46:24,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-27 23:46:25,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:46:25,830 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:46:25,831 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-27 23:46:25,849 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba8981fa5/fa04c2fe060a4163b19d9c57a95732dc/FLAG101397afd [2024-06-27 23:46:25,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba8981fa5/fa04c2fe060a4163b19d9c57a95732dc [2024-06-27 23:46:25,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:46:25,867 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:46:25,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:46:25,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:46:25,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:46:25,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:46:24" (1/2) ... [2024-06-27 23:46:25,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7195cd21 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:46:25, skipping insertion in model container [2024-06-27 23:46:25,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:46:24" (1/2) ... [2024-06-27 23:46:25,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@33cd2b34 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:46:25, skipping insertion in model container [2024-06-27 23:46:25,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:46:25" (2/2) ... [2024-06-27 23:46:25,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7195cd21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:25, skipping insertion in model container [2024-06-27 23:46:25,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:46:25" (2/2) ... [2024-06-27 23:46:25,877 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:46:25,902 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:46:25,903 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$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 )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 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_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:46:25,903 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$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 )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 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_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:46:25,904 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$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 )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 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_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:46:25,904 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:46:25,904 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-27 23:46:25,941 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:46:26,267 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:46:26,275 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:46:26,429 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:46:26,465 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:46:26,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26 WrapperNode [2024-06-27 23:46:26,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:46:26,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:46:26,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:46:26,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:46:26,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,540 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 133 [2024-06-27 23:46:26,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:46:26,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:46:26,541 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:46:26,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:46:26,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,569 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,593 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 23:46:26,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,611 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:46:26,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:46:26,617 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:46:26,617 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:46:26,618 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (1/1) ... [2024-06-27 23:46:26,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:46:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:46:26,674 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 23:46:26,714 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 23:46:26,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:46:26,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:46:26,730 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:46:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:46:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:46:26,731 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:46:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:46:26,731 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:46:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:46:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:46:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:46:26,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:46:26,734 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 23:46:26,843 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:46:26,844 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:46:27,292 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:46:27,293 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:46:27,501 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:46:27,501 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:46:27,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:46:27 BoogieIcfgContainer [2024-06-27 23:46:27,502 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:46:27,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:46:27,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:46:27,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:46:27,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:46:24" (1/4) ... [2024-06-27 23:46:27,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c31589 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:46:27, skipping insertion in model container [2024-06-27 23:46:27,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:46:25" (2/4) ... [2024-06-27 23:46:27,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c31589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:46:27, skipping insertion in model container [2024-06-27 23:46:27,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:46:26" (3/4) ... [2024-06-27 23:46:27,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c31589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:46:27, skipping insertion in model container [2024-06-27 23:46:27,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:46:27" (4/4) ... [2024-06-27 23:46:27,512 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038.opt.i [2024-06-27 23:46:27,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:46:27,526 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:46:27,527 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:46:27,566 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:46:27,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:46:27,622 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 23:46:27,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:46:27,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:46:27,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:46:27,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 23:46:27,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:46:27,646 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;@36b2a98a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:46:27,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:46:27,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:46:27,651 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:46:27,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:46:27,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:27,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:46:27,652 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 23:46:27,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash 359771266, now seen corresponding path program 1 times [2024-06-27 23:46:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612418109] [2024-06-27 23:46:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:27,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:28,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:28,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612418109] [2024-06-27 23:46:28,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612418109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:28,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:28,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:46:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459908737] [2024-06-27 23:46:28,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:28,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:46:28,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:46:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:46:28,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 23:46:28,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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 23:46:28,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:28,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 23:46:28,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:29,211 INFO L124 PetriNetUnfolderBase]: 1116/1816 cut-off events. [2024-06-27 23:46:29,211 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 23:46:29,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 1816 events. 1116/1816 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9229 event pairs, 765 based on Foata normal form. 1/1752 useless extension candidates. Maximal degree in co-relation 3555. Up to 1676 conditions per place. [2024-06-27 23:46:29,226 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 23:46:29,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-27 23:46:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:46:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:46:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 23:46:29,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 23:46:29,238 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 80 transitions. [2024-06-27 23:46:29,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-27 23:46:29,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:46:29,243 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 23:46:29,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 23:46:29,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 23:46:29,248 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 23:46:29,248 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 23:46:29,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:29,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:29,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:46:29,249 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 23:46:29,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2142835425, now seen corresponding path program 1 times [2024-06-27 23:46:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:29,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602031030] [2024-06-27 23:46:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:29,894 INFO 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 23:46:29,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:29,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602031030] [2024-06-27 23:46:29,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602031030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:29,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:29,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:46:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790201529] [2024-06-27 23:46:29,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:29,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:46:29,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:29,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:46:29,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:46:29,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:46:29,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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 23:46:29,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:29,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:46:29,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:30,234 INFO L124 PetriNetUnfolderBase]: 1280/2007 cut-off events. [2024-06-27 23:46:30,234 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-06-27 23:46:30,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4528 conditions, 2007 events. 1280/2007 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9937 event pairs, 750 based on Foata normal form. 3/1978 useless extension candidates. Maximal degree in co-relation 4516. Up to 1897 conditions per place. [2024-06-27 23:46:30,244 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 23:46:30,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-27 23:46:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:46:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:46:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-27 23:46:30,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-27 23:46:30,246 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-27 23:46:30,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-27 23:46:30,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:46:30,248 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 23:46:30,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 23:46:30,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 23:46:30,249 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 23:46:30,249 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 23:46:30,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:30,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:30,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:46:30,250 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 23:46:30,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2003389811, now seen corresponding path program 1 times [2024-06-27 23:46:30,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:30,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605546415] [2024-06-27 23:46:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:30,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:30,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:30,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605546415] [2024-06-27 23:46:30,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605546415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:30,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:30,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:46:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13210190] [2024-06-27 23:46:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:30,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:46:30,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:30,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:46:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:46:31,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:46:31,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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 23:46:31,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:31,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:46:31,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:31,335 INFO L124 PetriNetUnfolderBase]: 1302/2076 cut-off events. [2024-06-27 23:46:31,335 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-27 23:46:31,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5163 conditions, 2076 events. 1302/2076 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10481 event pairs, 470 based on Foata normal form. 7/2070 useless extension candidates. Maximal degree in co-relation 5149. Up to 1800 conditions per place. [2024-06-27 23:46:31,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-27 23:46:31,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 406 flow [2024-06-27 23:46:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:46:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:46:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 23:46:31,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 23:46:31,347 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 135 transitions. [2024-06-27 23:46:31,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 406 flow [2024-06-27 23:46:31,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:46:31,350 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 23:46:31,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 23:46:31,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 23:46:31,351 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 23:46:31,351 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 23:46:31,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:31,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:31,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:46:31,352 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 23:46:31,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1967601872, now seen corresponding path program 1 times [2024-06-27 23:46:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:31,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332804297] [2024-06-27 23:46:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:32,271 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 23:46:32,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332804297] [2024-06-27 23:46:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332804297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:32,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:32,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384157700] [2024-06-27 23:46:32,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:32,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:32,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:32,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:32,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:46:32,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 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 23:46:32,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:32,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:46:32,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:32,748 INFO L124 PetriNetUnfolderBase]: 1384/2220 cut-off events. [2024-06-27 23:46:32,749 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2024-06-27 23:46:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6579 conditions, 2220 events. 1384/2220 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11470 event pairs, 321 based on Foata normal form. 26/2231 useless extension candidates. Maximal degree in co-relation 6562. Up to 1764 conditions per place. [2024-06-27 23:46:32,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 18 changer transitions 0/88 dead transitions. [2024-06-27 23:46:32,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 523 flow [2024-06-27 23:46:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 23:46:32,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-27 23:46:32,762 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 158 transitions. [2024-06-27 23:46:32,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 523 flow [2024-06-27 23:46:32,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 515 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 23:46:32,766 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 285 flow [2024-06-27 23:46:32,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 23:46:32,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 23:46:32,767 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 285 flow [2024-06-27 23:46:32,767 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 23:46:32,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:32,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:32,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:46:32,768 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 23:46:32,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash 529676278, now seen corresponding path program 1 times [2024-06-27 23:46:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:32,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143473611] [2024-06-27 23:46:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:32,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:33,743 INFO 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 23:46:33,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143473611] [2024-06-27 23:46:33,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143473611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:33,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:33,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:46:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188650567] [2024-06-27 23:46:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:46:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:46:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:46:33,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:33,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 285 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 23:46:33,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:33,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:33,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:34,216 INFO L124 PetriNetUnfolderBase]: 1204/2027 cut-off events. [2024-06-27 23:46:34,217 INFO L125 PetriNetUnfolderBase]: For 3655/3655 co-relation queries the response was YES. [2024-06-27 23:46:34,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 2027 events. 1204/2027 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10900 event pairs, 447 based on Foata normal form. 4/2022 useless extension candidates. Maximal degree in co-relation 6339. Up to 1814 conditions per place. [2024-06-27 23:46:34,228 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 47 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-27 23:46:34,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 441 flow [2024-06-27 23:46:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:46:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:46:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 23:46:34,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-06-27 23:46:34,229 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 285 flow. Second operand 5 states and 106 transitions. [2024-06-27 23:46:34,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 441 flow [2024-06-27 23:46:34,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 395 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:46:34,233 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 288 flow [2024-06-27 23:46:34,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-27 23:46:34,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-27 23:46:34,234 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 288 flow [2024-06-27 23:46:34,234 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 23:46:34,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:34,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:34,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:46:34,235 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 23:46:34,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1948773619, now seen corresponding path program 1 times [2024-06-27 23:46:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:34,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881456797] [2024-06-27 23:46:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:34,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:35,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:35,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881456797] [2024-06-27 23:46:35,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881456797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:35,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:35,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:35,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587273907] [2024-06-27 23:46:35,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:35,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:35,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:35,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:35,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 288 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 23:46:35,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:35,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:35,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:36,167 INFO L124 PetriNetUnfolderBase]: 1502/2406 cut-off events. [2024-06-27 23:46:36,168 INFO L125 PetriNetUnfolderBase]: For 5105/5105 co-relation queries the response was YES. [2024-06-27 23:46:36,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 2406 events. 1502/2406 cut-off events. For 5105/5105 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12373 event pairs, 446 based on Foata normal form. 8/2390 useless extension candidates. Maximal degree in co-relation 7758. Up to 2020 conditions per place. [2024-06-27 23:46:36,183 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 57 selfloop transitions, 29 changer transitions 0/92 dead transitions. [2024-06-27 23:46:36,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 666 flow [2024-06-27 23:46:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 23:46:36,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 23:46:36,185 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 288 flow. Second operand 6 states and 135 transitions. [2024-06-27 23:46:36,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 666 flow [2024-06-27 23:46:36,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 647 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:46:36,193 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 450 flow [2024-06-27 23:46:36,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=450, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-27 23:46:36,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-27 23:46:36,196 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 450 flow [2024-06-27 23:46:36,196 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 23:46:36,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:36,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:36,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:46:36,197 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 23:46:36,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2082191787, now seen corresponding path program 2 times [2024-06-27 23:46:36,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:36,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179406032] [2024-06-27 23:46:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:36,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:37,263 INFO 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 23:46:37,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:37,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179406032] [2024-06-27 23:46:37,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179406032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:37,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:37,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:37,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499326338] [2024-06-27 23:46:37,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:37,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:37,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:37,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:37,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 450 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 23:46:37,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:37,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:37,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:37,959 INFO L124 PetriNetUnfolderBase]: 1486/2369 cut-off events. [2024-06-27 23:46:37,959 INFO L125 PetriNetUnfolderBase]: For 6485/6487 co-relation queries the response was YES. [2024-06-27 23:46:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8139 conditions, 2369 events. 1486/2369 cut-off events. For 6485/6487 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12081 event pairs, 433 based on Foata normal form. 6/2352 useless extension candidates. Maximal degree in co-relation 8110. Up to 2008 conditions per place. [2024-06-27 23:46:37,983 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 49 selfloop transitions, 33 changer transitions 0/88 dead transitions. [2024-06-27 23:46:37,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 702 flow [2024-06-27 23:46:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-27 23:46:37,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-27 23:46:37,985 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 450 flow. Second operand 6 states and 131 transitions. [2024-06-27 23:46:37,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 702 flow [2024-06-27 23:46:37,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 673 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 23:46:37,994 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 507 flow [2024-06-27 23:46:37,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 23:46:37,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-27 23:46:37,995 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 507 flow [2024-06-27 23:46:37,996 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 23:46:37,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:37,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:37,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:46:37,996 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 23:46:37,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2037780723, now seen corresponding path program 3 times [2024-06-27 23:46:37,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:37,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683859789] [2024-06-27 23:46:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:38,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683859789] [2024-06-27 23:46:38,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683859789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:38,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:38,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932820408] [2024-06-27 23:46:38,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:38,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:38,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 507 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 23:46:38,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:38,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:38,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:39,511 INFO L124 PetriNetUnfolderBase]: 1542/2450 cut-off events. [2024-06-27 23:46:39,511 INFO L125 PetriNetUnfolderBase]: For 8962/8964 co-relation queries the response was YES. [2024-06-27 23:46:39,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 2450 events. 1542/2450 cut-off events. For 8962/8964 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12534 event pairs, 418 based on Foata normal form. 10/2444 useless extension candidates. Maximal degree in co-relation 8801. Up to 2019 conditions per place. [2024-06-27 23:46:39,528 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 60 selfloop transitions, 45 changer transitions 0/111 dead transitions. [2024-06-27 23:46:39,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 970 flow [2024-06-27 23:46:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:46:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:46:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 23:46:39,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 23:46:39,531 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 507 flow. Second operand 7 states and 150 transitions. [2024-06-27 23:46:39,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 970 flow [2024-06-27 23:46:39,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 111 transitions, 909 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 23:46:39,548 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 756 flow [2024-06-27 23:46:39,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=756, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-27 23:46:39,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 23:46:39,552 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 756 flow [2024-06-27 23:46:39,552 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 23:46:39,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:39,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:39,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:46:39,553 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 23:46:39,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash -123189217, now seen corresponding path program 1 times [2024-06-27 23:46:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:39,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854499689] [2024-06-27 23:46:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:41,102 INFO 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 23:46:41,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854499689] [2024-06-27 23:46:41,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854499689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:41,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:41,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:41,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108179733] [2024-06-27 23:46:41,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:41,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:41,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:41,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 756 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 23:46:41,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:41,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:41,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:41,828 INFO L124 PetriNetUnfolderBase]: 1364/2269 cut-off events. [2024-06-27 23:46:41,828 INFO L125 PetriNetUnfolderBase]: For 10116/10118 co-relation queries the response was YES. [2024-06-27 23:46:41,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8453 conditions, 2269 events. 1364/2269 cut-off events. For 10116/10118 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 12053 event pairs, 467 based on Foata normal form. 4/2258 useless extension candidates. Maximal degree in co-relation 8416. Up to 2014 conditions per place. [2024-06-27 23:46:41,839 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-06-27 23:46:41,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 1058 flow [2024-06-27 23:46:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:46:41,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 23:46:41,841 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 756 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:46:41,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 1058 flow [2024-06-27 23:46:41,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 1017 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 23:46:41,849 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 806 flow [2024-06-27 23:46:41,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=806, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-27 23:46:41,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-27 23:46:41,850 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 806 flow [2024-06-27 23:46:41,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 23:46:41,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:41,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:41,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:46:41,851 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 23:46:41,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash 275117078, now seen corresponding path program 1 times [2024-06-27 23:46:41,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:41,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163847987] [2024-06-27 23:46:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:41,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:42,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163847987] [2024-06-27 23:46:42,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163847987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:42,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:42,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:46:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566310362] [2024-06-27 23:46:42,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:46:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:46:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:46:42,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:46:42,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 806 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 23:46:42,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:42,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:46:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:43,180 INFO L124 PetriNetUnfolderBase]: 1361/2255 cut-off events. [2024-06-27 23:46:43,180 INFO L125 PetriNetUnfolderBase]: For 11659/11661 co-relation queries the response was YES. [2024-06-27 23:46:43,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8705 conditions, 2255 events. 1361/2255 cut-off events. For 11659/11661 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11881 event pairs, 481 based on Foata normal form. 1/2241 useless extension candidates. Maximal degree in co-relation 8666. Up to 2043 conditions per place. [2024-06-27 23:46:43,191 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 82 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-06-27 23:46:43,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 1030 flow [2024-06-27 23:46:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:46:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:46:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 23:46:43,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-27 23:46:43,193 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 806 flow. Second operand 5 states and 101 transitions. [2024-06-27 23:46:43,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 1030 flow [2024-06-27 23:46:43,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 982 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 23:46:43,205 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 810 flow [2024-06-27 23:46:43,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=810, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-06-27 23:46:43,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 23:46:43,207 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 810 flow [2024-06-27 23:46:43,207 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 23:46:43,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:43,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:43,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:46:43,208 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:43,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash -61304236, now seen corresponding path program 1 times [2024-06-27 23:46:43,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:43,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264432646] [2024-06-27 23:46:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264432646] [2024-06-27 23:46:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264432646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:44,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:44,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558800717] [2024-06-27 23:46:44,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:44,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:44,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 810 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 23:46:44,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:44,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:44,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:44,684 INFO L124 PetriNetUnfolderBase]: 1528/2446 cut-off events. [2024-06-27 23:46:44,684 INFO L125 PetriNetUnfolderBase]: For 14702/14704 co-relation queries the response was YES. [2024-06-27 23:46:44,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9877 conditions, 2446 events. 1528/2446 cut-off events. For 14702/14704 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12591 event pairs, 553 based on Foata normal form. 1/2445 useless extension candidates. Maximal degree in co-relation 9839. Up to 2281 conditions per place. [2024-06-27 23:46:44,698 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-06-27 23:46:44,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 1050 flow [2024-06-27 23:46:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:46:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:46:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 23:46:44,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 23:46:44,699 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 810 flow. Second operand 7 states and 123 transitions. [2024-06-27 23:46:44,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 1050 flow [2024-06-27 23:46:44,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 103 transitions, 1020 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 23:46:44,712 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 842 flow [2024-06-27 23:46:44,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=842, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-27 23:46:44,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-27 23:46:44,713 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 842 flow [2024-06-27 23:46:44,713 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 23:46:44,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:44,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:44,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:46:44,714 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 23:46:44,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -475697726, now seen corresponding path program 1 times [2024-06-27 23:46:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:44,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933853404] [2024-06-27 23:46:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:46,092 INFO 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 23:46:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:46,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933853404] [2024-06-27 23:46:46,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933853404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:46,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:46,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567931340] [2024-06-27 23:46:46,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:46,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:46,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:46,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:46,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:46,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:46,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 842 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 23:46:46,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:46,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:46,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:46,845 INFO L124 PetriNetUnfolderBase]: 1675/2671 cut-off events. [2024-06-27 23:46:46,845 INFO L125 PetriNetUnfolderBase]: For 21161/21163 co-relation queries the response was YES. [2024-06-27 23:46:46,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11357 conditions, 2671 events. 1675/2671 cut-off events. For 21161/21163 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14054 event pairs, 426 based on Foata normal form. 26/2688 useless extension candidates. Maximal degree in co-relation 11318. Up to 2045 conditions per place. [2024-06-27 23:46:46,861 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 70 selfloop transitions, 48 changer transitions 0/125 dead transitions. [2024-06-27 23:46:46,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 1196 flow [2024-06-27 23:46:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 23:46:46,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 23:46:46,863 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 842 flow. Second operand 8 states and 164 transitions. [2024-06-27 23:46:46,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 1196 flow [2024-06-27 23:46:46,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1156 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:46:46,877 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 932 flow [2024-06-27 23:46:46,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=932, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-06-27 23:46:46,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 23:46:46,878 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 932 flow [2024-06-27 23:46:46,878 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 23:46:46,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:46,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:46,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:46:46,879 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 23:46:46,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -475815836, now seen corresponding path program 2 times [2024-06-27 23:46:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:46,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948805375] [2024-06-27 23:46:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:48,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:48,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948805375] [2024-06-27 23:46:48,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948805375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:48,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:48,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:48,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007396151] [2024-06-27 23:46:48,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:48,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:48,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:48,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:48,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:48,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:48,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 932 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 23:46:48,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:48,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:48,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:49,002 INFO L124 PetriNetUnfolderBase]: 1912/3093 cut-off events. [2024-06-27 23:46:49,002 INFO L125 PetriNetUnfolderBase]: For 26557/26559 co-relation queries the response was YES. [2024-06-27 23:46:49,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13464 conditions, 3093 events. 1912/3093 cut-off events. For 26557/26559 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17008 event pairs, 501 based on Foata normal form. 18/3102 useless extension candidates. Maximal degree in co-relation 13424. Up to 2058 conditions per place. [2024-06-27 23:46:49,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 45 changer transitions 0/136 dead transitions. [2024-06-27 23:46:49,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1394 flow [2024-06-27 23:46:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:46:49,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:46:49,021 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 932 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:46:49,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1394 flow [2024-06-27 23:46:49,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 1265 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:46:49,039 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 959 flow [2024-06-27 23:46:49,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-27 23:46:49,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 23:46:49,039 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 959 flow [2024-06-27 23:46:49,040 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 23:46:49,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:49,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:49,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:46:49,040 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:49,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1911872075, now seen corresponding path program 1 times [2024-06-27 23:46:49,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:49,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714986007] [2024-06-27 23:46:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:49,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:49,996 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 23:46:49,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714986007] [2024-06-27 23:46:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714986007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:49,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:49,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:49,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127697465] [2024-06-27 23:46:49,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:49,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:49,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:50,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:50,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 959 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 23:46:50,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:50,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:50,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:50,516 INFO L124 PetriNetUnfolderBase]: 1947/3131 cut-off events. [2024-06-27 23:46:50,516 INFO L125 PetriNetUnfolderBase]: For 27645/27650 co-relation queries the response was YES. [2024-06-27 23:46:50,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13894 conditions, 3131 events. 1947/3131 cut-off events. For 27645/27650 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17051 event pairs, 646 based on Foata normal form. 5/3133 useless extension candidates. Maximal degree in co-relation 13853. Up to 2900 conditions per place. [2024-06-27 23:46:50,534 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2024-06-27 23:46:50,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 119 transitions, 1275 flow [2024-06-27 23:46:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 23:46:50,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 23:46:50,535 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 959 flow. Second operand 6 states and 118 transitions. [2024-06-27 23:46:50,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 119 transitions, 1275 flow [2024-06-27 23:46:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1217 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 23:46:50,558 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1012 flow [2024-06-27 23:46:50,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1012, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2024-06-27 23:46:50,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-27 23:46:50,559 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1012 flow [2024-06-27 23:46:50,560 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 23:46:50,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:50,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:50,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:46:50,560 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 23:46:50,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash -504797984, now seen corresponding path program 1 times [2024-06-27 23:46:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:50,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594804589] [2024-06-27 23:46:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:50,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:52,274 INFO 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 23:46:52,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594804589] [2024-06-27 23:46:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594804589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:52,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:52,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:52,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390363651] [2024-06-27 23:46:52,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:52,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:52,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:52,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1012 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:52,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:52,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:52,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:53,193 INFO L124 PetriNetUnfolderBase]: 1982/3183 cut-off events. [2024-06-27 23:46:53,194 INFO L125 PetriNetUnfolderBase]: For 30735/30735 co-relation queries the response was YES. [2024-06-27 23:46:53,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14654 conditions, 3183 events. 1982/3183 cut-off events. For 30735/30735 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17339 event pairs, 541 based on Foata normal form. 4/3171 useless extension candidates. Maximal degree in co-relation 14610. Up to 2657 conditions per place. [2024-06-27 23:46:53,234 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 73 changer transitions 0/155 dead transitions. [2024-06-27 23:46:53,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 155 transitions, 1649 flow [2024-06-27 23:46:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:46:53,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 23:46:53,236 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1012 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:46:53,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 155 transitions, 1649 flow [2024-06-27 23:46:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 155 transitions, 1614 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 23:46:53,258 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1416 flow [2024-06-27 23:46:53,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1416, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-27 23:46:53,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 23:46:53,259 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1416 flow [2024-06-27 23:46:53,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:53,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:53,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:46:53,260 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1911128082, now seen corresponding path program 2 times [2024-06-27 23:46:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:53,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948974193] [2024-06-27 23:46:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:54,848 INFO 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 23:46:54,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:54,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948974193] [2024-06-27 23:46:54,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948974193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:54,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168010523] [2024-06-27 23:46:54,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:54,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:54,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:54,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:54,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1416 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:54,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:54,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:54,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:55,706 INFO L124 PetriNetUnfolderBase]: 2126/3433 cut-off events. [2024-06-27 23:46:55,707 INFO L125 PetriNetUnfolderBase]: For 38254/38254 co-relation queries the response was YES. [2024-06-27 23:46:55,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16686 conditions, 3433 events. 2126/3433 cut-off events. For 38254/38254 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19226 event pairs, 394 based on Foata normal form. 4/3421 useless extension candidates. Maximal degree in co-relation 16638. Up to 2549 conditions per place. [2024-06-27 23:46:55,727 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 79 selfloop transitions, 81 changer transitions 0/167 dead transitions. [2024-06-27 23:46:55,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 167 transitions, 1976 flow [2024-06-27 23:46:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:46:55,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 23:46:55,729 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1416 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:46:55,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 167 transitions, 1976 flow [2024-06-27 23:46:55,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 167 transitions, 1863 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 23:46:55,757 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1588 flow [2024-06-27 23:46:55,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-27 23:46:55,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 23:46:55,758 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1588 flow [2024-06-27 23:46:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:55,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:55,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:46:55,759 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 23:46:55,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -732699134, now seen corresponding path program 3 times [2024-06-27 23:46:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124377204] [2024-06-27 23:46:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:57,316 INFO 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 23:46:57,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:57,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124377204] [2024-06-27 23:46:57,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124377204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:57,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:57,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:46:57,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586609015] [2024-06-27 23:46:57,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:57,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:46:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:46:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:46:57,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:57,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1588 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:57,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:57,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:57,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:58,265 INFO L124 PetriNetUnfolderBase]: 2118/3420 cut-off events. [2024-06-27 23:46:58,265 INFO L125 PetriNetUnfolderBase]: For 42971/42971 co-relation queries the response was YES. [2024-06-27 23:46:58,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17051 conditions, 3420 events. 2118/3420 cut-off events. For 42971/42971 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19095 event pairs, 585 based on Foata normal form. 4/3410 useless extension candidates. Maximal degree in co-relation 17001. Up to 2885 conditions per place. [2024-06-27 23:46:58,283 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 82 selfloop transitions, 73 changer transitions 0/162 dead transitions. [2024-06-27 23:46:58,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 162 transitions, 2004 flow [2024-06-27 23:46:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:46:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:46:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:46:58,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 23:46:58,285 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1588 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:46:58,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 162 transitions, 2004 flow [2024-06-27 23:46:58,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 162 transitions, 1828 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:46:58,314 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 1605 flow [2024-06-27 23:46:58,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1605, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-06-27 23:46:58,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-27 23:46:58,315 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 1605 flow [2024-06-27 23:46:58,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:58,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:58,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:58,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:46:58,315 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:58,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1900444235, now seen corresponding path program 2 times [2024-06-27 23:46:58,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:58,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928926184] [2024-06-27 23:46:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:59,289 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 23:46:59,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928926184] [2024-06-27 23:46:59,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928926184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:59,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:59,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:46:59,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709953023] [2024-06-27 23:46:59,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:59,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:46:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:46:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:46:59,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:46:59,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 1605 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 23:46:59,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:59,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:46:59,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:59,868 INFO L124 PetriNetUnfolderBase]: 2123/3438 cut-off events. [2024-06-27 23:46:59,868 INFO L125 PetriNetUnfolderBase]: For 45824/45833 co-relation queries the response was YES. [2024-06-27 23:46:59,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17233 conditions, 3438 events. 2123/3438 cut-off events. For 45824/45833 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19327 event pairs, 569 based on Foata normal form. 7/3440 useless extension candidates. Maximal degree in co-relation 17181. Up to 3178 conditions per place. [2024-06-27 23:46:59,890 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 119 selfloop transitions, 27 changer transitions 0/153 dead transitions. [2024-06-27 23:46:59,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 2029 flow [2024-06-27 23:46:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:46:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:46:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 23:46:59,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 23:46:59,891 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 1605 flow. Second operand 6 states and 116 transitions. [2024-06-27 23:46:59,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 2029 flow [2024-06-27 23:46:59,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 153 transitions, 1807 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:46:59,927 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1517 flow [2024-06-27 23:46:59,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1517, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-27 23:46:59,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-27 23:46:59,927 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1517 flow [2024-06-27 23:46:59,928 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 23:46:59,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:59,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:59,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:46:59,928 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 23:46:59,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1954884506, now seen corresponding path program 3 times [2024-06-27 23:46:59,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:59,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259407522] [2024-06-27 23:46:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:59,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:00,919 INFO 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 23:47:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:00,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259407522] [2024-06-27 23:47:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259407522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:00,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:00,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457757888] [2024-06-27 23:47:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:00,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:00,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:01,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:01,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1517 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 23:47:01,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:01,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:01,766 INFO L124 PetriNetUnfolderBase]: 2557/4185 cut-off events. [2024-06-27 23:47:01,766 INFO L125 PetriNetUnfolderBase]: For 56102/56110 co-relation queries the response was YES. [2024-06-27 23:47:01,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20524 conditions, 4185 events. 2557/4185 cut-off events. For 56102/56110 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24979 event pairs, 694 based on Foata normal form. 24/4204 useless extension candidates. Maximal degree in co-relation 20472. Up to 2726 conditions per place. [2024-06-27 23:47:01,789 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 69 changer transitions 0/204 dead transitions. [2024-06-27 23:47:01,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 204 transitions, 2328 flow [2024-06-27 23:47:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 23:47:01,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 23:47:01,792 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1517 flow. Second operand 8 states and 176 transitions. [2024-06-27 23:47:01,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 204 transitions, 2328 flow [2024-06-27 23:47:01,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 2279 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 23:47:01,839 INFO L231 Difference]: Finished difference. Result has 117 places, 155 transitions, 1801 flow [2024-06-27 23:47:01,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1801, PETRI_PLACES=117, PETRI_TRANSITIONS=155} [2024-06-27 23:47:01,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-27 23:47:01,840 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 155 transitions, 1801 flow [2024-06-27 23:47:01,840 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 23:47:01,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:01,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:01,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:47:01,841 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 23:47:01,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash -719940712, now seen corresponding path program 4 times [2024-06-27 23:47:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055709930] [2024-06-27 23:47:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:02,894 INFO 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 23:47:02,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055709930] [2024-06-27 23:47:02,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055709930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:02,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:02,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409977982] [2024-06-27 23:47:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:02,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:02,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 155 transitions, 1801 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 23:47:02,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:02,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:02,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:03,886 INFO L124 PetriNetUnfolderBase]: 2616/4288 cut-off events. [2024-06-27 23:47:03,886 INFO L125 PetriNetUnfolderBase]: For 63455/63463 co-relation queries the response was YES. [2024-06-27 23:47:03,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21563 conditions, 4288 events. 2616/4288 cut-off events. For 63455/63463 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25770 event pairs, 692 based on Foata normal form. 44/4327 useless extension candidates. Maximal degree in co-relation 21508. Up to 3416 conditions per place. [2024-06-27 23:47:03,916 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-27 23:47:03,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 199 transitions, 2424 flow [2024-06-27 23:47:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 23:47:03,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 23:47:03,918 INFO L175 Difference]: Start difference. First operand has 117 places, 155 transitions, 1801 flow. Second operand 8 states and 172 transitions. [2024-06-27 23:47:03,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 199 transitions, 2424 flow [2024-06-27 23:47:03,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 199 transitions, 2338 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:03,983 INFO L231 Difference]: Finished difference. Result has 121 places, 159 transitions, 1936 flow [2024-06-27 23:47:03,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1936, PETRI_PLACES=121, PETRI_TRANSITIONS=159} [2024-06-27 23:47:03,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-27 23:47:03,984 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 159 transitions, 1936 flow [2024-06-27 23:47:03,984 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 23:47:03,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:03,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:03,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:47:03,985 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 23:47:03,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -509818042, now seen corresponding path program 5 times [2024-06-27 23:47:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026454438] [2024-06-27 23:47:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:04,752 INFO 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 23:47:04,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:04,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026454438] [2024-06-27 23:47:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026454438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:04,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:04,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415679494] [2024-06-27 23:47:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:04,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:04,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:04,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 23:47:04,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 159 transitions, 1936 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 23:47:04,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:04,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 23:47:04,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:05,566 INFO L124 PetriNetUnfolderBase]: 2223/4056 cut-off events. [2024-06-27 23:47:05,566 INFO L125 PetriNetUnfolderBase]: For 59653/59912 co-relation queries the response was YES. [2024-06-27 23:47:05,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20518 conditions, 4056 events. 2223/4056 cut-off events. For 59653/59912 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28045 event pairs, 363 based on Foata normal form. 119/4042 useless extension candidates. Maximal degree in co-relation 20461. Up to 1687 conditions per place. [2024-06-27 23:47:05,595 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 85 changer transitions 0/213 dead transitions. [2024-06-27 23:47:05,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 213 transitions, 2758 flow [2024-06-27 23:47:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 23:47:05,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-27 23:47:05,596 INFO L175 Difference]: Start difference. First operand has 121 places, 159 transitions, 1936 flow. Second operand 7 states and 164 transitions. [2024-06-27 23:47:05,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 213 transitions, 2758 flow [2024-06-27 23:47:05,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 213 transitions, 2616 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:05,658 INFO L231 Difference]: Finished difference. Result has 124 places, 172 transitions, 2232 flow [2024-06-27 23:47:05,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2232, PETRI_PLACES=124, PETRI_TRANSITIONS=172} [2024-06-27 23:47:05,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-27 23:47:05,659 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 172 transitions, 2232 flow [2024-06-27 23:47:05,659 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 23:47:05,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:05,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:05,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:47:05,660 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 23:47:05,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:05,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1924363403, now seen corresponding path program 3 times [2024-06-27 23:47:05,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:05,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101087881] [2024-06-27 23:47:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:05,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:06,426 INFO 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 23:47:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101087881] [2024-06-27 23:47:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101087881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:06,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:06,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062507773] [2024-06-27 23:47:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:06,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:06,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:06,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 172 transitions, 2232 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 23:47:06,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:06,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:06,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:07,254 INFO L124 PetriNetUnfolderBase]: 2962/4931 cut-off events. [2024-06-27 23:47:07,254 INFO L125 PetriNetUnfolderBase]: For 73182/73182 co-relation queries the response was YES. [2024-06-27 23:47:07,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26005 conditions, 4931 events. 2962/4931 cut-off events. For 73182/73182 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31390 event pairs, 1204 based on Foata normal form. 1/4930 useless extension candidates. Maximal degree in co-relation 25945. Up to 4561 conditions per place. [2024-06-27 23:47:07,287 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 24 changer transitions 0/194 dead transitions. [2024-06-27 23:47:07,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 194 transitions, 2696 flow [2024-06-27 23:47:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 23:47:07,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 23:47:07,289 INFO L175 Difference]: Start difference. First operand has 124 places, 172 transitions, 2232 flow. Second operand 7 states and 136 transitions. [2024-06-27 23:47:07,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 194 transitions, 2696 flow [2024-06-27 23:47:07,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 194 transitions, 2594 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:47:07,378 INFO L231 Difference]: Finished difference. Result has 129 places, 177 transitions, 2244 flow [2024-06-27 23:47:07,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=129, PETRI_TRANSITIONS=177} [2024-06-27 23:47:07,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 23:47:07,379 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 177 transitions, 2244 flow [2024-06-27 23:47:07,379 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 23:47:07,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:07,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:07,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:47:07,379 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:07,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1906152203, now seen corresponding path program 1 times [2024-06-27 23:47:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:07,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87233654] [2024-06-27 23:47:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:07,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:08,166 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 23:47:08,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:08,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87233654] [2024-06-27 23:47:08,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87233654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:08,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:08,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:08,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222269214] [2024-06-27 23:47:08,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:08,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:08,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:08,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:47:08,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 177 transitions, 2244 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 23:47:08,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:08,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:47:08,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:08,931 INFO L124 PetriNetUnfolderBase]: 2797/4745 cut-off events. [2024-06-27 23:47:08,932 INFO L125 PetriNetUnfolderBase]: For 69996/69996 co-relation queries the response was YES. [2024-06-27 23:47:08,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24298 conditions, 4745 events. 2797/4745 cut-off events. For 69996/69996 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30797 event pairs, 1240 based on Foata normal form. 1/4744 useless extension candidates. Maximal degree in co-relation 24236. Up to 4339 conditions per place. [2024-06-27 23:47:08,966 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 13 changer transitions 0/191 dead transitions. [2024-06-27 23:47:08,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 191 transitions, 2666 flow [2024-06-27 23:47:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:47:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:47:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 23:47:08,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:47:08,968 INFO L175 Difference]: Start difference. First operand has 129 places, 177 transitions, 2244 flow. Second operand 6 states and 120 transitions. [2024-06-27 23:47:08,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 191 transitions, 2666 flow [2024-06-27 23:47:09,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 191 transitions, 2608 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:09,048 INFO L231 Difference]: Finished difference. Result has 130 places, 180 transitions, 2248 flow [2024-06-27 23:47:09,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2248, PETRI_PLACES=130, PETRI_TRANSITIONS=180} [2024-06-27 23:47:09,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 23:47:09,049 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 180 transitions, 2248 flow [2024-06-27 23:47:09,049 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 23:47:09,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:09,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:47:09,050 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:09,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1900438283, now seen corresponding path program 2 times [2024-06-27 23:47:09,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:09,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055028049] [2024-06-27 23:47:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:09,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:09,975 INFO 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 23:47:09,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:09,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055028049] [2024-06-27 23:47:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055028049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:09,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:47:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898815405] [2024-06-27 23:47:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:09,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:47:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:47:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:47:10,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:47:10,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 180 transitions, 2248 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 23:47:10,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:10,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:47:10,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:10,749 INFO L124 PetriNetUnfolderBase]: 2794/4742 cut-off events. [2024-06-27 23:47:10,749 INFO L125 PetriNetUnfolderBase]: For 74088/74091 co-relation queries the response was YES. [2024-06-27 23:47:10,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24768 conditions, 4742 events. 2794/4742 cut-off events. For 74088/74091 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30763 event pairs, 1244 based on Foata normal form. 3/4742 useless extension candidates. Maximal degree in co-relation 24705. Up to 4329 conditions per place. [2024-06-27 23:47:10,782 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 165 selfloop transitions, 18 changer transitions 0/191 dead transitions. [2024-06-27 23:47:10,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2666 flow [2024-06-27 23:47:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:47:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:47:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 23:47:10,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 23:47:10,784 INFO L175 Difference]: Start difference. First operand has 130 places, 180 transitions, 2248 flow. Second operand 6 states and 119 transitions. [2024-06-27 23:47:10,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2666 flow [2024-06-27 23:47:10,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 2626 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:10,857 INFO L231 Difference]: Finished difference. Result has 132 places, 183 transitions, 2286 flow [2024-06-27 23:47:10,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2286, PETRI_PLACES=132, PETRI_TRANSITIONS=183} [2024-06-27 23:47:10,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 23:47:10,858 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 183 transitions, 2286 flow [2024-06-27 23:47:10,858 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 23:47:10,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:10,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:10,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:47:10,858 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:10,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1900430347, now seen corresponding path program 1 times [2024-06-27 23:47:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:10,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890210916] [2024-06-27 23:47:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:11,864 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 23:47:11,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:11,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890210916] [2024-06-27 23:47:11,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890210916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:11,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978351236] [2024-06-27 23:47:11,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:11,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:11,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:11,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:11,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 183 transitions, 2286 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 23:47:11,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:11,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:11,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:12,669 INFO L124 PetriNetUnfolderBase]: 2876/4822 cut-off events. [2024-06-27 23:47:12,670 INFO L125 PetriNetUnfolderBase]: For 78147/78147 co-relation queries the response was YES. [2024-06-27 23:47:12,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25609 conditions, 4822 events. 2876/4822 cut-off events. For 78147/78147 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30883 event pairs, 1263 based on Foata normal form. 1/4821 useless extension candidates. Maximal degree in co-relation 25545. Up to 4493 conditions per place. [2024-06-27 23:47:12,707 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 16 changer transitions 0/195 dead transitions. [2024-06-27 23:47:12,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 195 transitions, 2724 flow [2024-06-27 23:47:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 23:47:12,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 23:47:12,709 INFO L175 Difference]: Start difference. First operand has 132 places, 183 transitions, 2286 flow. Second operand 8 states and 138 transitions. [2024-06-27 23:47:12,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 195 transitions, 2724 flow [2024-06-27 23:47:12,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 195 transitions, 2668 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:12,783 INFO L231 Difference]: Finished difference. Result has 136 places, 186 transitions, 2310 flow [2024-06-27 23:47:12,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2310, PETRI_PLACES=136, PETRI_TRANSITIONS=186} [2024-06-27 23:47:12,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 23:47:12,783 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 186 transitions, 2310 flow [2024-06-27 23:47:12,784 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 23:47:12,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:12,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:12,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:47:12,784 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:12,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1718024766, now seen corresponding path program 1 times [2024-06-27 23:47:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931889525] [2024-06-27 23:47:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:14,326 INFO 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 23:47:14,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:14,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931889525] [2024-06-27 23:47:14,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931889525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:14,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:14,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356418929] [2024-06-27 23:47:14,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:14,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:14,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:14,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:14,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:14,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 186 transitions, 2310 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:14,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:14,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:14,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:15,410 INFO L124 PetriNetUnfolderBase]: 3205/5402 cut-off events. [2024-06-27 23:47:15,410 INFO L125 PetriNetUnfolderBase]: For 101777/101777 co-relation queries the response was YES. [2024-06-27 23:47:15,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29073 conditions, 5402 events. 3205/5402 cut-off events. For 101777/101777 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35652 event pairs, 968 based on Foata normal form. 24/5417 useless extension candidates. Maximal degree in co-relation 29008. Up to 3998 conditions per place. [2024-06-27 23:47:15,456 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 80 changer transitions 0/230 dead transitions. [2024-06-27 23:47:15,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 230 transitions, 3095 flow [2024-06-27 23:47:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 23:47:15,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 23:47:15,458 INFO L175 Difference]: Start difference. First operand has 136 places, 186 transitions, 2310 flow. Second operand 9 states and 181 transitions. [2024-06-27 23:47:15,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 230 transitions, 3095 flow [2024-06-27 23:47:15,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 230 transitions, 3037 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:15,562 INFO L231 Difference]: Finished difference. Result has 141 places, 200 transitions, 2718 flow [2024-06-27 23:47:15,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2718, PETRI_PLACES=141, PETRI_TRANSITIONS=200} [2024-06-27 23:47:15,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 23:47:15,562 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 200 transitions, 2718 flow [2024-06-27 23:47:15,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:15,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:15,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:15,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:47:15,563 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:15,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1836863713, now seen corresponding path program 1 times [2024-06-27 23:47:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:15,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793324282] [2024-06-27 23:47:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:15,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:16,453 INFO 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 23:47:16,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:16,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793324282] [2024-06-27 23:47:16,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793324282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:16,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:16,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:16,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460596011] [2024-06-27 23:47:16,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:16,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:16,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 200 transitions, 2718 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 23:47:16,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:16,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:17,387 INFO L124 PetriNetUnfolderBase]: 3215/5412 cut-off events. [2024-06-27 23:47:17,387 INFO L125 PetriNetUnfolderBase]: For 105487/105490 co-relation queries the response was YES. [2024-06-27 23:47:17,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30498 conditions, 5412 events. 3215/5412 cut-off events. For 105487/105490 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35681 event pairs, 1086 based on Foata normal form. 4/5409 useless extension candidates. Maximal degree in co-relation 30430. Up to 4840 conditions per place. [2024-06-27 23:47:17,431 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 175 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-06-27 23:47:17,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 228 transitions, 3392 flow [2024-06-27 23:47:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 23:47:17,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 23:47:17,433 INFO L175 Difference]: Start difference. First operand has 141 places, 200 transitions, 2718 flow. Second operand 7 states and 144 transitions. [2024-06-27 23:47:17,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 228 transitions, 3392 flow [2024-06-27 23:47:17,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 228 transitions, 3253 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:17,570 INFO L231 Difference]: Finished difference. Result has 146 places, 211 transitions, 2892 flow [2024-06-27 23:47:17,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2587, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2892, PETRI_PLACES=146, PETRI_TRANSITIONS=211} [2024-06-27 23:47:17,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-27 23:47:17,570 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 211 transitions, 2892 flow [2024-06-27 23:47:17,570 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 23:47:17,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:17,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:17,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:47:17,571 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:17,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash -767043775, now seen corresponding path program 2 times [2024-06-27 23:47:17,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:17,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548309681] [2024-06-27 23:47:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:18,498 INFO 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 23:47:18,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:18,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548309681] [2024-06-27 23:47:18,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548309681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:18,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:18,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:18,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904300181] [2024-06-27 23:47:18,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:18,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:18,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:18,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:18,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:18,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 211 transitions, 2892 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 23:47:18,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:18,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:18,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:19,475 INFO L124 PetriNetUnfolderBase]: 3243/5457 cut-off events. [2024-06-27 23:47:19,476 INFO L125 PetriNetUnfolderBase]: For 111626/111629 co-relation queries the response was YES. [2024-06-27 23:47:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31335 conditions, 5457 events. 3243/5457 cut-off events. For 111626/111629 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 36019 event pairs, 1074 based on Foata normal form. 4/5454 useless extension candidates. Maximal degree in co-relation 31263. Up to 4836 conditions per place. [2024-06-27 23:47:19,515 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 176 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-27 23:47:19,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 233 transitions, 3546 flow [2024-06-27 23:47:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 23:47:19,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 23:47:19,516 INFO L175 Difference]: Start difference. First operand has 146 places, 211 transitions, 2892 flow. Second operand 7 states and 142 transitions. [2024-06-27 23:47:19,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 233 transitions, 3546 flow [2024-06-27 23:47:19,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 233 transitions, 3487 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-27 23:47:19,645 INFO L231 Difference]: Finished difference. Result has 153 places, 219 transitions, 3073 flow [2024-06-27 23:47:19,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3073, PETRI_PLACES=153, PETRI_TRANSITIONS=219} [2024-06-27 23:47:19,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 23:47:19,646 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 219 transitions, 3073 flow [2024-06-27 23:47:19,646 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 23:47:19,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:19,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:19,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:47:19,647 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:19,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1199644825, now seen corresponding path program 1 times [2024-06-27 23:47:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:19,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586709421] [2024-06-27 23:47:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:20,655 INFO 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 23:47:20,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:20,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586709421] [2024-06-27 23:47:20,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586709421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:20,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:20,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:20,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926974189] [2024-06-27 23:47:20,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:20,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:20,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:20,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:20,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 219 transitions, 3073 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:20,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:20,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:20,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:21,637 INFO L124 PetriNetUnfolderBase]: 3333/5544 cut-off events. [2024-06-27 23:47:21,637 INFO L125 PetriNetUnfolderBase]: For 120016/120019 co-relation queries the response was YES. [2024-06-27 23:47:21,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32690 conditions, 5544 events. 3333/5544 cut-off events. For 120016/120019 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 36034 event pairs, 1230 based on Foata normal form. 3/5544 useless extension candidates. Maximal degree in co-relation 32614. Up to 5179 conditions per place. [2024-06-27 23:47:21,677 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 26 changer transitions 0/234 dead transitions. [2024-06-27 23:47:21,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 234 transitions, 3609 flow [2024-06-27 23:47:21,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 23:47:21,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 23:47:21,679 INFO L175 Difference]: Start difference. First operand has 153 places, 219 transitions, 3073 flow. Second operand 7 states and 127 transitions. [2024-06-27 23:47:21,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 234 transitions, 3609 flow [2024-06-27 23:47:21,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 234 transitions, 3516 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 23:47:21,806 INFO L231 Difference]: Finished difference. Result has 157 places, 222 transitions, 3089 flow [2024-06-27 23:47:21,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3089, PETRI_PLACES=157, PETRI_TRANSITIONS=222} [2024-06-27 23:47:21,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 23:47:21,808 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 222 transitions, 3089 flow [2024-06-27 23:47:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:21,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:47:21,809 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 23:47:21,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1150268406, now seen corresponding path program 2 times [2024-06-27 23:47:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788453363] [2024-06-27 23:47:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:23,608 INFO 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 23:47:23,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:23,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788453363] [2024-06-27 23:47:23,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788453363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:23,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:23,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:23,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027646144] [2024-06-27 23:47:23,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:23,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:23,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:23,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:23,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 222 transitions, 3089 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:23,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:23,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:23,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:24,900 INFO L124 PetriNetUnfolderBase]: 3307/5583 cut-off events. [2024-06-27 23:47:24,900 INFO L125 PetriNetUnfolderBase]: For 126313/126316 co-relation queries the response was YES. [2024-06-27 23:47:24,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32265 conditions, 5583 events. 3307/5583 cut-off events. For 126313/126316 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37163 event pairs, 1033 based on Foata normal form. 26/5592 useless extension candidates. Maximal degree in co-relation 32187. Up to 4472 conditions per place. [2024-06-27 23:47:24,951 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 81 changer transitions 0/255 dead transitions. [2024-06-27 23:47:24,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 255 transitions, 3751 flow [2024-06-27 23:47:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:47:24,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 23:47:24,953 INFO L175 Difference]: Start difference. First operand has 157 places, 222 transitions, 3089 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:47:24,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 255 transitions, 3751 flow [2024-06-27 23:47:25,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 255 transitions, 3648 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:25,093 INFO L231 Difference]: Finished difference. Result has 162 places, 225 transitions, 3221 flow [2024-06-27 23:47:25,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3221, PETRI_PLACES=162, PETRI_TRANSITIONS=225} [2024-06-27 23:47:25,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 23:47:25,093 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 225 transitions, 3221 flow [2024-06-27 23:47:25,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:25,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:25,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:25,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:47:25,094 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 23:47:25,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2027480738, now seen corresponding path program 3 times [2024-06-27 23:47:25,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:25,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644209585] [2024-06-27 23:47:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:26,825 INFO 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 23:47:26,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:26,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644209585] [2024-06-27 23:47:26,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644209585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:26,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:26,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:26,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280388897] [2024-06-27 23:47:26,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:26,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:26,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:26,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:26,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 225 transitions, 3221 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:26,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:26,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:26,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:28,049 INFO L124 PetriNetUnfolderBase]: 3315/5582 cut-off events. [2024-06-27 23:47:28,050 INFO L125 PetriNetUnfolderBase]: For 125088/125091 co-relation queries the response was YES. [2024-06-27 23:47:28,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32361 conditions, 5582 events. 3315/5582 cut-off events. For 125088/125091 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36996 event pairs, 886 based on Foata normal form. 20/5585 useless extension candidates. Maximal degree in co-relation 32281. Up to 3352 conditions per place. [2024-06-27 23:47:28,097 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 102 changer transitions 0/259 dead transitions. [2024-06-27 23:47:28,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 259 transitions, 3922 flow [2024-06-27 23:47:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:47:28,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 23:47:28,099 INFO L175 Difference]: Start difference. First operand has 162 places, 225 transitions, 3221 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:47:28,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 259 transitions, 3922 flow [2024-06-27 23:47:28,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 259 transitions, 3769 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:28,248 INFO L231 Difference]: Finished difference. Result has 167 places, 226 transitions, 3344 flow [2024-06-27 23:47:28,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3344, PETRI_PLACES=167, PETRI_TRANSITIONS=226} [2024-06-27 23:47:28,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 23:47:28,249 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 226 transitions, 3344 flow [2024-06-27 23:47:28,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:28,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:28,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:47:28,249 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:28,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1215771425, now seen corresponding path program 3 times [2024-06-27 23:47:28,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:28,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017087583] [2024-06-27 23:47:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:29,269 INFO 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 23:47:29,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:29,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017087583] [2024-06-27 23:47:29,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017087583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:29,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:29,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:29,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207578220] [2024-06-27 23:47:29,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:29,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:29,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:29,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:29,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:29,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:29,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 226 transitions, 3344 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 23:47:29,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:29,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:29,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:30,161 INFO L124 PetriNetUnfolderBase]: 3343/5629 cut-off events. [2024-06-27 23:47:30,162 INFO L125 PetriNetUnfolderBase]: For 128757/128760 co-relation queries the response was YES. [2024-06-27 23:47:30,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33248 conditions, 5629 events. 3343/5629 cut-off events. For 128757/128760 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 37439 event pairs, 1102 based on Foata normal form. 4/5616 useless extension candidates. Maximal degree in co-relation 33169. Up to 4943 conditions per place. [2024-06-27 23:47:30,213 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 66 changer transitions 0/251 dead transitions. [2024-06-27 23:47:30,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 251 transitions, 4184 flow [2024-06-27 23:47:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 23:47:30,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:47:30,214 INFO L175 Difference]: Start difference. First operand has 167 places, 226 transitions, 3344 flow. Second operand 7 states and 140 transitions. [2024-06-27 23:47:30,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 251 transitions, 4184 flow [2024-06-27 23:47:30,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 251 transitions, 4005 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:30,373 INFO L231 Difference]: Finished difference. Result has 169 places, 237 transitions, 3471 flow [2024-06-27 23:47:30,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3471, PETRI_PLACES=169, PETRI_TRANSITIONS=237} [2024-06-27 23:47:30,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 23:47:30,374 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 237 transitions, 3471 flow [2024-06-27 23:47:30,374 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 23:47:30,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:30,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:30,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:47:30,375 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 23:47:30,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1215771797, now seen corresponding path program 2 times [2024-06-27 23:47:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:30,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935364266] [2024-06-27 23:47:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:31,375 INFO 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 23:47:31,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:31,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935364266] [2024-06-27 23:47:31,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935364266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:31,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:31,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:31,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400525044] [2024-06-27 23:47:31,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:31,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:31,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:31,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:31,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:31,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 237 transitions, 3471 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:31,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:31,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:31,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:32,281 INFO L124 PetriNetUnfolderBase]: 3431/5716 cut-off events. [2024-06-27 23:47:32,282 INFO L125 PetriNetUnfolderBase]: For 135669/135675 co-relation queries the response was YES. [2024-06-27 23:47:32,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34224 conditions, 5716 events. 3431/5716 cut-off events. For 135669/135675 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 37489 event pairs, 1243 based on Foata normal form. 5/5716 useless extension candidates. Maximal degree in co-relation 34143. Up to 5324 conditions per place. [2024-06-27 23:47:32,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 42 changer transitions 0/257 dead transitions. [2024-06-27 23:47:32,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 257 transitions, 4293 flow [2024-06-27 23:47:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 23:47:32,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 23:47:32,330 INFO L175 Difference]: Start difference. First operand has 169 places, 237 transitions, 3471 flow. Second operand 7 states and 128 transitions. [2024-06-27 23:47:32,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 257 transitions, 4293 flow [2024-06-27 23:47:32,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 257 transitions, 4180 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 23:47:32,466 INFO L231 Difference]: Finished difference. Result has 174 places, 246 transitions, 3616 flow [2024-06-27 23:47:32,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3616, PETRI_PLACES=174, PETRI_TRANSITIONS=246} [2024-06-27 23:47:32,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 23:47:32,466 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 246 transitions, 3616 flow [2024-06-27 23:47:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:32,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:32,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:32,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:47:32,468 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 23:47:32,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1355014675, now seen corresponding path program 3 times [2024-06-27 23:47:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146941823] [2024-06-27 23:47:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:32,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:33,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146941823] [2024-06-27 23:47:33,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146941823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:33,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:33,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:33,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041288555] [2024-06-27 23:47:33,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:33,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:33,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:33,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:33,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:33,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 246 transitions, 3616 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:33,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:33,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:33,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:34,502 INFO L124 PetriNetUnfolderBase]: 3428/5712 cut-off events. [2024-06-27 23:47:34,503 INFO L125 PetriNetUnfolderBase]: For 139892/139898 co-relation queries the response was YES. [2024-06-27 23:47:34,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34035 conditions, 5712 events. 3428/5712 cut-off events. For 139892/139898 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 37515 event pairs, 1243 based on Foata normal form. 5/5712 useless extension candidates. Maximal degree in co-relation 33952. Up to 5321 conditions per place. [2024-06-27 23:47:34,557 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 45 changer transitions 0/256 dead transitions. [2024-06-27 23:47:34,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 256 transitions, 4210 flow [2024-06-27 23:47:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:47:34,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:47:34,559 INFO L175 Difference]: Start difference. First operand has 174 places, 246 transitions, 3616 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:47:34,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 256 transitions, 4210 flow [2024-06-27 23:47:34,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 256 transitions, 4097 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 23:47:34,726 INFO L231 Difference]: Finished difference. Result has 179 places, 246 transitions, 3599 flow [2024-06-27 23:47:34,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3599, PETRI_PLACES=179, PETRI_TRANSITIONS=246} [2024-06-27 23:47:34,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-27 23:47:34,727 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 246 transitions, 3599 flow [2024-06-27 23:47:34,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:34,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:34,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:34,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:47:34,728 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:34,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1990701400, now seen corresponding path program 4 times [2024-06-27 23:47:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:34,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588157812] [2024-06-27 23:47:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:34,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588157812] [2024-06-27 23:47:36,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588157812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:36,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:36,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:47:36,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104366704] [2024-06-27 23:47:36,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:36,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:47:36,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:47:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:47:36,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:36,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 246 transitions, 3599 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:36,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:36,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:36,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:37,541 INFO L124 PetriNetUnfolderBase]: 3486/5871 cut-off events. [2024-06-27 23:47:37,542 INFO L125 PetriNetUnfolderBase]: For 148343/148343 co-relation queries the response was YES. [2024-06-27 23:47:37,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34918 conditions, 5871 events. 3486/5871 cut-off events. For 148343/148343 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 39464 event pairs, 1031 based on Foata normal form. 12/5878 useless extension candidates. Maximal degree in co-relation 34833. Up to 4602 conditions per place. [2024-06-27 23:47:37,597 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 94 changer transitions 0/304 dead transitions. [2024-06-27 23:47:37,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 304 transitions, 4638 flow [2024-06-27 23:47:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:47:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:47:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 23:47:37,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-27 23:47:37,599 INFO L175 Difference]: Start difference. First operand has 179 places, 246 transitions, 3599 flow. Second operand 9 states and 188 transitions. [2024-06-27 23:47:37,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 304 transitions, 4638 flow [2024-06-27 23:47:37,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 304 transitions, 4541 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:37,787 INFO L231 Difference]: Finished difference. Result has 184 places, 262 transitions, 4037 flow [2024-06-27 23:47:37,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4037, PETRI_PLACES=184, PETRI_TRANSITIONS=262} [2024-06-27 23:47:37,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 23:47:37,788 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 262 transitions, 4037 flow [2024-06-27 23:47:37,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:37,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:37,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:37,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:47:37,789 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:37,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:37,789 INFO L85 PathProgramCache]: Analyzing trace with hash -450227193, now seen corresponding path program 4 times [2024-06-27 23:47:37,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:37,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644086576] [2024-06-27 23:47:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:37,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:38,753 INFO 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 23:47:38,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:38,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644086576] [2024-06-27 23:47:38,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644086576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:38,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:38,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510695355] [2024-06-27 23:47:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:38,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:38,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:38,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:38,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 262 transitions, 4037 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 23:47:38,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:38,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:38,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:39,820 INFO L124 PetriNetUnfolderBase]: 3572/6016 cut-off events. [2024-06-27 23:47:39,820 INFO L125 PetriNetUnfolderBase]: For 159003/159005 co-relation queries the response was YES. [2024-06-27 23:47:39,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36985 conditions, 6016 events. 3572/6016 cut-off events. For 159003/159005 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 40601 event pairs, 1115 based on Foata normal form. 5/6016 useless extension candidates. Maximal degree in co-relation 36897. Up to 5179 conditions per place. [2024-06-27 23:47:39,876 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 186 selfloop transitions, 121 changer transitions 0/318 dead transitions. [2024-06-27 23:47:39,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 318 transitions, 5308 flow [2024-06-27 23:47:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 23:47:39,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 23:47:39,878 INFO L175 Difference]: Start difference. First operand has 184 places, 262 transitions, 4037 flow. Second operand 8 states and 167 transitions. [2024-06-27 23:47:39,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 318 transitions, 5308 flow [2024-06-27 23:47:40,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 318 transitions, 5052 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:47:40,092 INFO L231 Difference]: Finished difference. Result has 186 places, 293 transitions, 4676 flow [2024-06-27 23:47:40,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=186, PETRI_TRANSITIONS=293} [2024-06-27 23:47:40,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 23:47:40,092 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 293 transitions, 4676 flow [2024-06-27 23:47:40,093 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 23:47:40,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:40,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:40,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:47:40,093 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 23:47:40,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash 473978687, now seen corresponding path program 5 times [2024-06-27 23:47:40,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:40,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804403994] [2024-06-27 23:47:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:40,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:40,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:40,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804403994] [2024-06-27 23:47:40,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804403994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:40,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:40,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:40,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117736593] [2024-06-27 23:47:40,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:40,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:40,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:40,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:40,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 293 transitions, 4676 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 23:47:40,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:40,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:40,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:42,075 INFO L124 PetriNetUnfolderBase]: 3604/6059 cut-off events. [2024-06-27 23:47:42,075 INFO L125 PetriNetUnfolderBase]: For 159901/159906 co-relation queries the response was YES. [2024-06-27 23:47:42,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38169 conditions, 6059 events. 3604/6059 cut-off events. For 159901/159906 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 40838 event pairs, 1136 based on Foata normal form. 6/6062 useless extension candidates. Maximal degree in co-relation 38080. Up to 5401 conditions per place. [2024-06-27 23:47:42,130 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 254 selfloop transitions, 69 changer transitions 0/334 dead transitions. [2024-06-27 23:47:42,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 334 transitions, 5723 flow [2024-06-27 23:47:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:47:42,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 23:47:42,136 INFO L175 Difference]: Start difference. First operand has 186 places, 293 transitions, 4676 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:47:42,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 334 transitions, 5723 flow [2024-06-27 23:47:42,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 334 transitions, 5392 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:42,355 INFO L231 Difference]: Finished difference. Result has 191 places, 312 transitions, 4926 flow [2024-06-27 23:47:42,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4926, PETRI_PLACES=191, PETRI_TRANSITIONS=312} [2024-06-27 23:47:42,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 23:47:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 312 transitions, 4926 flow [2024-06-27 23:47:42,356 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 23:47:42,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:42,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:47:42,357 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 23:47:42,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash 474277589, now seen corresponding path program 4 times [2024-06-27 23:47:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871647972] [2024-06-27 23:47:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:43,251 INFO 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 23:47:43,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:43,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871647972] [2024-06-27 23:47:43,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871647972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:43,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:43,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347801519] [2024-06-27 23:47:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:43,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:43,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:43,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:47:43,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 312 transitions, 4926 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:43,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:43,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:47:43,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:44,412 INFO L124 PetriNetUnfolderBase]: 3681/6132 cut-off events. [2024-06-27 23:47:44,412 INFO L125 PetriNetUnfolderBase]: For 163241/163243 co-relation queries the response was YES. [2024-06-27 23:47:44,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38728 conditions, 6132 events. 3681/6132 cut-off events. For 163241/163243 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40884 event pairs, 1417 based on Foata normal form. 3/6133 useless extension candidates. Maximal degree in co-relation 38636. Up to 5724 conditions per place. [2024-06-27 23:47:44,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 298 selfloop transitions, 30 changer transitions 0/333 dead transitions. [2024-06-27 23:47:44,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 333 transitions, 5659 flow [2024-06-27 23:47:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:47:44,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 23:47:44,472 INFO L175 Difference]: Start difference. First operand has 191 places, 312 transitions, 4926 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:47:44,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 333 transitions, 5659 flow [2024-06-27 23:47:44,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 333 transitions, 5491 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:44,708 INFO L231 Difference]: Finished difference. Result has 195 places, 315 transitions, 4855 flow [2024-06-27 23:47:44,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4855, PETRI_PLACES=195, PETRI_TRANSITIONS=315} [2024-06-27 23:47:44,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 23:47:44,708 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 315 transitions, 4855 flow [2024-06-27 23:47:44,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:44,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:44,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:47:44,709 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 23:47:44,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash 474277217, now seen corresponding path program 6 times [2024-06-27 23:47:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:44,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279814889] [2024-06-27 23:47:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:45,672 INFO 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 23:47:45,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279814889] [2024-06-27 23:47:45,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279814889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:45,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:45,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488340536] [2024-06-27 23:47:45,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:45,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:45,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:45,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:45,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:45,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 315 transitions, 4855 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 23:47:45,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:45,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:45,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:46,771 INFO L124 PetriNetUnfolderBase]: 3638/6109 cut-off events. [2024-06-27 23:47:46,771 INFO L125 PetriNetUnfolderBase]: For 171367/171370 co-relation queries the response was YES. [2024-06-27 23:47:46,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38575 conditions, 6109 events. 3638/6109 cut-off events. For 171367/171370 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41124 event pairs, 1146 based on Foata normal form. 4/6110 useless extension candidates. Maximal degree in co-relation 38483. Up to 5379 conditions per place. [2024-06-27 23:47:46,827 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 254 selfloop transitions, 82 changer transitions 0/348 dead transitions. [2024-06-27 23:47:46,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 348 transitions, 5854 flow [2024-06-27 23:47:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:47:46,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 23:47:46,829 INFO L175 Difference]: Start difference. First operand has 195 places, 315 transitions, 4855 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:47:46,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 348 transitions, 5854 flow [2024-06-27 23:47:47,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 348 transitions, 5711 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 23:47:47,085 INFO L231 Difference]: Finished difference. Result has 196 places, 328 transitions, 5137 flow [2024-06-27 23:47:47,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5137, PETRI_PLACES=196, PETRI_TRANSITIONS=328} [2024-06-27 23:47:47,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 23:47:47,086 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 328 transitions, 5137 flow [2024-06-27 23:47:47,086 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 23:47:47,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:47,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:47,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:47:47,087 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 23:47:47,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash -997124495, now seen corresponding path program 1 times [2024-06-27 23:47:47,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:47,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864668398] [2024-06-27 23:47:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:47,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:48,260 INFO 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 23:47:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864668398] [2024-06-27 23:47:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864668398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:48,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:48,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:48,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686729923] [2024-06-27 23:47:48,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:48,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:48,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:48,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:47:48,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 328 transitions, 5137 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:48,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:48,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:47:48,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:49,397 INFO L124 PetriNetUnfolderBase]: 3476/5924 cut-off events. [2024-06-27 23:47:49,397 INFO L125 PetriNetUnfolderBase]: For 160765/160765 co-relation queries the response was YES. [2024-06-27 23:47:49,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37222 conditions, 5924 events. 3476/5924 cut-off events. For 160765/160765 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 40454 event pairs, 1470 based on Foata normal form. 1/5923 useless extension candidates. Maximal degree in co-relation 37129. Up to 5392 conditions per place. [2024-06-27 23:47:49,450 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 16 changer transitions 0/346 dead transitions. [2024-06-27 23:47:49,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 346 transitions, 5895 flow [2024-06-27 23:47:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:47:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:47:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:47:49,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:47:49,451 INFO L175 Difference]: Start difference. First operand has 196 places, 328 transitions, 5137 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:47:49,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 346 transitions, 5895 flow [2024-06-27 23:47:49,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 346 transitions, 5655 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:49,673 INFO L231 Difference]: Finished difference. Result has 198 places, 331 transitions, 4983 flow [2024-06-27 23:47:49,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4983, PETRI_PLACES=198, PETRI_TRANSITIONS=331} [2024-06-27 23:47:49,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 23:47:49,674 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 331 transitions, 4983 flow [2024-06-27 23:47:49,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:49,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:49,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:49,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:47:49,675 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 23:47:49,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:49,675 INFO L85 PathProgramCache]: Analyzing trace with hash -658025231, now seen corresponding path program 1 times [2024-06-27 23:47:49,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:49,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222971158] [2024-06-27 23:47:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:49,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:50,594 INFO 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 23:47:50,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:50,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222971158] [2024-06-27 23:47:50,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222971158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:50,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:50,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:50,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280169350] [2024-06-27 23:47:50,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:50,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:50,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:50,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:50,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:50,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:50,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 331 transitions, 4983 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 23:47:50,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:50,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:50,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:51,664 INFO L124 PetriNetUnfolderBase]: 3556/6006 cut-off events. [2024-06-27 23:47:51,664 INFO L125 PetriNetUnfolderBase]: For 164128/164128 co-relation queries the response was YES. [2024-06-27 23:47:51,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37824 conditions, 6006 events. 3556/6006 cut-off events. For 164128/164128 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 40705 event pairs, 1493 based on Foata normal form. 1/6005 useless extension candidates. Maximal degree in co-relation 37730. Up to 5561 conditions per place. [2024-06-27 23:47:51,722 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 324 selfloop transitions, 16 changer transitions 0/346 dead transitions. [2024-06-27 23:47:51,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 346 transitions, 5739 flow [2024-06-27 23:47:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 23:47:51,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 23:47:51,723 INFO L175 Difference]: Start difference. First operand has 198 places, 331 transitions, 4983 flow. Second operand 7 states and 129 transitions. [2024-06-27 23:47:51,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 346 transitions, 5739 flow [2024-06-27 23:47:51,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 346 transitions, 5675 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 23:47:51,953 INFO L231 Difference]: Finished difference. Result has 199 places, 334 transitions, 5001 flow [2024-06-27 23:47:51,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5001, PETRI_PLACES=199, PETRI_TRANSITIONS=334} [2024-06-27 23:47:51,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 23:47:51,954 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 334 transitions, 5001 flow [2024-06-27 23:47:51,954 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 23:47:51,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:51,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:47:51,954 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 23:47:51,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:51,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1038824603, now seen corresponding path program 2 times [2024-06-27 23:47:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:51,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128997322] [2024-06-27 23:47:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:53,220 INFO 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 23:47:53,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:53,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128997322] [2024-06-27 23:47:53,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128997322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:53,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:53,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174057717] [2024-06-27 23:47:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:53,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:53,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 334 transitions, 5001 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 23:47:53,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:53,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:53,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:54,390 INFO L124 PetriNetUnfolderBase]: 3663/6141 cut-off events. [2024-06-27 23:47:54,390 INFO L125 PetriNetUnfolderBase]: For 195253/195253 co-relation queries the response was YES. [2024-06-27 23:47:54,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40128 conditions, 6141 events. 3663/6141 cut-off events. For 195253/195253 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41320 event pairs, 1529 based on Foata normal form. 1/6140 useless extension candidates. Maximal degree in co-relation 40033. Up to 5649 conditions per place. [2024-06-27 23:47:54,457 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 21 changer transitions 0/349 dead transitions. [2024-06-27 23:47:54,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 349 transitions, 5761 flow [2024-06-27 23:47:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 23:47:54,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 23:47:54,458 INFO L175 Difference]: Start difference. First operand has 199 places, 334 transitions, 5001 flow. Second operand 7 states and 131 transitions. [2024-06-27 23:47:54,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 349 transitions, 5761 flow [2024-06-27 23:47:54,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 349 transitions, 5701 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:54,810 INFO L231 Difference]: Finished difference. Result has 201 places, 337 transitions, 5045 flow [2024-06-27 23:47:54,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5045, PETRI_PLACES=201, PETRI_TRANSITIONS=337} [2024-06-27 23:47:54,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-27 23:47:54,811 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 337 transitions, 5045 flow [2024-06-27 23:47:54,811 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 23:47:54,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:54,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:54,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:47:54,811 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 23:47:54,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1216193459, now seen corresponding path program 2 times [2024-06-27 23:47:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:54,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445490587] [2024-06-27 23:47:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:54,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:55,885 INFO 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 23:47:55,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445490587] [2024-06-27 23:47:55,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445490587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:55,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:55,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96468058] [2024-06-27 23:47:55,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:55,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:55,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:55,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 337 transitions, 5045 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 23:47:55,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:55,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:55,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:56,960 INFO L124 PetriNetUnfolderBase]: 3566/6023 cut-off events. [2024-06-27 23:47:56,960 INFO L125 PetriNetUnfolderBase]: For 178366/178369 co-relation queries the response was YES. [2024-06-27 23:47:56,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38987 conditions, 6023 events. 3566/6023 cut-off events. For 178366/178369 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 40879 event pairs, 1497 based on Foata normal form. 3/6023 useless extension candidates. Maximal degree in co-relation 38891. Up to 5559 conditions per place. [2024-06-27 23:47:57,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 29 changer transitions 0/353 dead transitions. [2024-06-27 23:47:57,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 353 transitions, 5941 flow [2024-06-27 23:47:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:47:57,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 23:47:57,017 INFO L175 Difference]: Start difference. First operand has 201 places, 337 transitions, 5045 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:47:57,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 353 transitions, 5941 flow [2024-06-27 23:47:57,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 353 transitions, 5859 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:47:57,279 INFO L231 Difference]: Finished difference. Result has 203 places, 343 transitions, 5125 flow [2024-06-27 23:47:57,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5125, PETRI_PLACES=203, PETRI_TRANSITIONS=343} [2024-06-27 23:47:57,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 23:47:57,280 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 343 transitions, 5125 flow [2024-06-27 23:47:57,280 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 23:47:57,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:57,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:57,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:47:57,280 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 23:47:57,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:57,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1215956123, now seen corresponding path program 3 times [2024-06-27 23:47:57,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:57,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981082598] [2024-06-27 23:47:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:57,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:58,626 INFO 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 23:47:58,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:58,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981082598] [2024-06-27 23:47:58,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981082598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:58,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:58,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:47:58,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795081296] [2024-06-27 23:47:58,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:58,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:47:58,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:47:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:47:58,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:47:58,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 343 transitions, 5125 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 23:47:58,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:58,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:47:58,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:59,847 INFO L124 PetriNetUnfolderBase]: 3648/6127 cut-off events. [2024-06-27 23:47:59,847 INFO L125 PetriNetUnfolderBase]: For 213629/213629 co-relation queries the response was YES. [2024-06-27 23:47:59,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41184 conditions, 6127 events. 3648/6127 cut-off events. For 213629/213629 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41374 event pairs, 1525 based on Foata normal form. 1/6123 useless extension candidates. Maximal degree in co-relation 41087. Up to 5624 conditions per place. [2024-06-27 23:47:59,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 28 changer transitions 0/355 dead transitions. [2024-06-27 23:47:59,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 355 transitions, 5889 flow [2024-06-27 23:47:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:47:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:47:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:47:59,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 23:47:59,922 INFO L175 Difference]: Start difference. First operand has 203 places, 343 transitions, 5125 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:47:59,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 355 transitions, 5889 flow [2024-06-27 23:48:00,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 355 transitions, 5822 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 23:48:00,204 INFO L231 Difference]: Finished difference. Result has 207 places, 346 transitions, 5184 flow [2024-06-27 23:48:00,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5184, PETRI_PLACES=207, PETRI_TRANSITIONS=346} [2024-06-27 23:48:00,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-27 23:48:00,205 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 346 transitions, 5184 flow [2024-06-27 23:48:00,205 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 23:48:00,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:00,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:00,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:48:00,206 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 23:48:00,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1215956309, now seen corresponding path program 3 times [2024-06-27 23:48:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706844782] [2024-06-27 23:48:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706844782] [2024-06-27 23:48:01,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706844782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:01,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:01,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:01,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714821652] [2024-06-27 23:48:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:01,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:01,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:01,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:01,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 346 transitions, 5184 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 23:48:01,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:01,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:01,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:02,412 INFO L124 PetriNetUnfolderBase]: 3560/6033 cut-off events. [2024-06-27 23:48:02,412 INFO L125 PetriNetUnfolderBase]: For 192604/192607 co-relation queries the response was YES. [2024-06-27 23:48:02,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39923 conditions, 6033 events. 3560/6033 cut-off events. For 192604/192607 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41101 event pairs, 1497 based on Foata normal form. 3/6033 useless extension candidates. Maximal degree in co-relation 39824. Up to 5552 conditions per place. [2024-06-27 23:48:02,466 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 28 changer transitions 0/355 dead transitions. [2024-06-27 23:48:02,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 355 transitions, 5908 flow [2024-06-27 23:48:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:48:02,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 23:48:02,468 INFO L175 Difference]: Start difference. First operand has 207 places, 346 transitions, 5184 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:48:02,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 355 transitions, 5908 flow [2024-06-27 23:48:02,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 355 transitions, 5782 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:02,767 INFO L231 Difference]: Finished difference. Result has 210 places, 346 transitions, 5120 flow [2024-06-27 23:48:02,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5120, PETRI_PLACES=210, PETRI_TRANSITIONS=346} [2024-06-27 23:48:02,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 23:48:02,768 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 346 transitions, 5120 flow [2024-06-27 23:48:02,768 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 23:48:02,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:02,768 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 23:48:02,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:48:02,769 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 23:48:02,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1260293872, now seen corresponding path program 1 times [2024-06-27 23:48:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:02,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399479249] [2024-06-27 23:48:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:03,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:03,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399479249] [2024-06-27 23:48:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399479249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:03,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332142093] [2024-06-27 23:48:03,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:03,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:03,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:03,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 346 transitions, 5120 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 23:48:03,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:03,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:03,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:05,094 INFO L124 PetriNetUnfolderBase]: 3682/6175 cut-off events. [2024-06-27 23:48:05,095 INFO L125 PetriNetUnfolderBase]: For 229609/229612 co-relation queries the response was YES. [2024-06-27 23:48:05,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42174 conditions, 6175 events. 3682/6175 cut-off events. For 229609/229612 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41664 event pairs, 1185 based on Foata normal form. 6/6171 useless extension candidates. Maximal degree in co-relation 42074. Up to 5505 conditions per place. [2024-06-27 23:48:05,170 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 61 changer transitions 0/370 dead transitions. [2024-06-27 23:48:05,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 370 transitions, 6024 flow [2024-06-27 23:48:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:05,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 23:48:05,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 23:48:05,171 INFO L175 Difference]: Start difference. First operand has 210 places, 346 transitions, 5120 flow. Second operand 7 states and 142 transitions. [2024-06-27 23:48:05,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 370 transitions, 6024 flow [2024-06-27 23:48:05,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 370 transitions, 5948 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:48:05,486 INFO L231 Difference]: Finished difference. Result has 210 places, 354 transitions, 5321 flow [2024-06-27 23:48:05,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5321, PETRI_PLACES=210, PETRI_TRANSITIONS=354} [2024-06-27 23:48:05,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 23:48:05,487 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 354 transitions, 5321 flow [2024-06-27 23:48:05,487 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 23:48:05,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:05,487 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 23:48:05,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:48:05,487 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 23:48:05,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1260086482, now seen corresponding path program 2 times [2024-06-27 23:48:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:05,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911811397] [2024-06-27 23:48:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:05,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:06,502 INFO 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 23:48:06,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:06,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911811397] [2024-06-27 23:48:06,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911811397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:06,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:06,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:06,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186863578] [2024-06-27 23:48:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:06,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:06,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:06,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:06,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:06,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:06,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 354 transitions, 5321 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 23:48:06,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:06,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:07,687 INFO L124 PetriNetUnfolderBase]: 3686/6180 cut-off events. [2024-06-27 23:48:07,688 INFO L125 PetriNetUnfolderBase]: For 236746/236749 co-relation queries the response was YES. [2024-06-27 23:48:07,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42562 conditions, 6180 events. 3686/6180 cut-off events. For 236746/236749 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41615 event pairs, 1144 based on Foata normal form. 6/6176 useless extension candidates. Maximal degree in co-relation 42461. Up to 5439 conditions per place. [2024-06-27 23:48:07,761 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 87 changer transitions 0/374 dead transitions. [2024-06-27 23:48:07,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 374 transitions, 6292 flow [2024-06-27 23:48:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 23:48:07,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-27 23:48:07,763 INFO L175 Difference]: Start difference. First operand has 210 places, 354 transitions, 5321 flow. Second operand 7 states and 141 transitions. [2024-06-27 23:48:07,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 374 transitions, 6292 flow [2024-06-27 23:48:08,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 374 transitions, 6087 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:08,107 INFO L231 Difference]: Finished difference. Result has 212 places, 360 transitions, 5429 flow [2024-06-27 23:48:08,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5429, PETRI_PLACES=212, PETRI_TRANSITIONS=360} [2024-06-27 23:48:08,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 23:48:08,108 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 360 transitions, 5429 flow [2024-06-27 23:48:08,108 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 23:48:08,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:08,108 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 23:48:08,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:48:08,108 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 23:48:08,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1269344539, now seen corresponding path program 1 times [2024-06-27 23:48:08,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791990428] [2024-06-27 23:48:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:08,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:09,092 INFO 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 23:48:09,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:09,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791990428] [2024-06-27 23:48:09,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791990428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:09,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:09,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014022497] [2024-06-27 23:48:09,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:09,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:09,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:09,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:09,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 360 transitions, 5429 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:09,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:09,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:09,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:10,320 INFO L124 PetriNetUnfolderBase]: 3761/6263 cut-off events. [2024-06-27 23:48:10,321 INFO L125 PetriNetUnfolderBase]: For 240787/240790 co-relation queries the response was YES. [2024-06-27 23:48:10,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43135 conditions, 6263 events. 3761/6263 cut-off events. For 240787/240790 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41994 event pairs, 1186 based on Foata normal form. 4/6257 useless extension candidates. Maximal degree in co-relation 43033. Up to 5658 conditions per place. [2024-06-27 23:48:10,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 71 changer transitions 0/381 dead transitions. [2024-06-27 23:48:10,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 381 transitions, 6308 flow [2024-06-27 23:48:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:48:10,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:48:10,391 INFO L175 Difference]: Start difference. First operand has 212 places, 360 transitions, 5429 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:48:10,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 381 transitions, 6308 flow [2024-06-27 23:48:10,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 381 transitions, 6119 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:10,834 INFO L231 Difference]: Finished difference. Result has 216 places, 364 transitions, 5471 flow [2024-06-27 23:48:10,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5471, PETRI_PLACES=216, PETRI_TRANSITIONS=364} [2024-06-27 23:48:10,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 23:48:10,835 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 364 transitions, 5471 flow [2024-06-27 23:48:10,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:10,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:10,836 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 23:48:10,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:48:10,836 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 23:48:10,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 936968660, now seen corresponding path program 1 times [2024-06-27 23:48:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:10,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204870213] [2024-06-27 23:48:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:11,896 INFO 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 23:48:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:11,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204870213] [2024-06-27 23:48:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204870213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:11,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:11,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:11,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782077929] [2024-06-27 23:48:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:11,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:11,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:11,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 364 transitions, 5471 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:11,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:11,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:11,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:13,095 INFO L124 PetriNetUnfolderBase]: 3766/6263 cut-off events. [2024-06-27 23:48:13,095 INFO L125 PetriNetUnfolderBase]: For 249580/249583 co-relation queries the response was YES. [2024-06-27 23:48:13,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43909 conditions, 6263 events. 3766/6263 cut-off events. For 249580/249583 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41890 event pairs, 1302 based on Foata normal form. 3/6263 useless extension candidates. Maximal degree in co-relation 43806. Up to 5839 conditions per place. [2024-06-27 23:48:13,166 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2024-06-27 23:48:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 380 transitions, 6323 flow [2024-06-27 23:48:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 23:48:13,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 23:48:13,167 INFO L175 Difference]: Start difference. First operand has 216 places, 364 transitions, 5471 flow. Second operand 8 states and 140 transitions. [2024-06-27 23:48:13,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 380 transitions, 6323 flow [2024-06-27 23:48:13,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 380 transitions, 6124 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 23:48:13,613 INFO L231 Difference]: Finished difference. Result has 218 places, 367 transitions, 5413 flow [2024-06-27 23:48:13,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5413, PETRI_PLACES=218, PETRI_TRANSITIONS=367} [2024-06-27 23:48:13,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 23:48:13,614 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 367 transitions, 5413 flow [2024-06-27 23:48:13,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:13,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:13,614 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 23:48:13,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:48:13,614 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:13,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:13,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1260078949, now seen corresponding path program 2 times [2024-06-27 23:48:13,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:13,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392627423] [2024-06-27 23:48:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:13,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:14,698 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 23:48:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392627423] [2024-06-27 23:48:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392627423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:14,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003308677] [2024-06-27 23:48:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:14,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:14,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 367 transitions, 5413 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:14,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:14,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:14,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:15,943 INFO L124 PetriNetUnfolderBase]: 3802/6324 cut-off events. [2024-06-27 23:48:15,944 INFO L125 PetriNetUnfolderBase]: For 260029/260032 co-relation queries the response was YES. [2024-06-27 23:48:15,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44657 conditions, 6324 events. 3802/6324 cut-off events. For 260029/260032 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 42433 event pairs, 1159 based on Foata normal form. 4/6318 useless extension candidates. Maximal degree in co-relation 44553. Up to 5581 conditions per place. [2024-06-27 23:48:16,017 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 93 changer transitions 0/392 dead transitions. [2024-06-27 23:48:16,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 392 transitions, 6618 flow [2024-06-27 23:48:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:48:16,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:48:16,019 INFO L175 Difference]: Start difference. First operand has 218 places, 367 transitions, 5413 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:48:16,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 392 transitions, 6618 flow [2024-06-27 23:48:16,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 392 transitions, 6501 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 23:48:16,449 INFO L231 Difference]: Finished difference. Result has 221 places, 375 transitions, 5676 flow [2024-06-27 23:48:16,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5676, PETRI_PLACES=221, PETRI_TRANSITIONS=375} [2024-06-27 23:48:16,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 23:48:16,450 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 375 transitions, 5676 flow [2024-06-27 23:48:16,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:16,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:16,450 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 23:48:16,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:48:16,450 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:16,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1991447689, now seen corresponding path program 3 times [2024-06-27 23:48:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:16,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359413292] [2024-06-27 23:48:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:17,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:17,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359413292] [2024-06-27 23:48:17,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359413292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:17,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:17,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:17,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925042664] [2024-06-27 23:48:17,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:17,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:17,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:17,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:17,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:17,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:17,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 375 transitions, 5676 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:17,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:17,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:17,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:18,701 INFO L124 PetriNetUnfolderBase]: 3806/6328 cut-off events. [2024-06-27 23:48:18,702 INFO L125 PetriNetUnfolderBase]: For 273876/273879 co-relation queries the response was YES. [2024-06-27 23:48:18,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45853 conditions, 6328 events. 3806/6328 cut-off events. For 273876/273879 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 42292 event pairs, 1158 based on Foata normal form. 4/6322 useless extension candidates. Maximal degree in co-relation 45747. Up to 5588 conditions per place. [2024-06-27 23:48:18,781 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 293 selfloop transitions, 96 changer transitions 0/394 dead transitions. [2024-06-27 23:48:18,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 394 transitions, 6692 flow [2024-06-27 23:48:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:48:18,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:48:18,789 INFO L175 Difference]: Start difference. First operand has 221 places, 375 transitions, 5676 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:48:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 394 transitions, 6692 flow [2024-06-27 23:48:19,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 394 transitions, 6473 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:19,303 INFO L231 Difference]: Finished difference. Result has 224 places, 379 transitions, 5752 flow [2024-06-27 23:48:19,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5469, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5752, PETRI_PLACES=224, PETRI_TRANSITIONS=379} [2024-06-27 23:48:19,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 23:48:19,304 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 379 transitions, 5752 flow [2024-06-27 23:48:19,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:19,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:19,304 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 23:48:19,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:48:19,304 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:19,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1422729544, now seen corresponding path program 3 times [2024-06-27 23:48:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:19,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081901348] [2024-06-27 23:48:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:19,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:20,169 INFO 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 23:48:20,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081901348] [2024-06-27 23:48:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081901348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:20,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:20,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333403778] [2024-06-27 23:48:20,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:20,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:20,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 379 transitions, 5752 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 23:48:20,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:20,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:20,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:21,374 INFO L124 PetriNetUnfolderBase]: 3738/6249 cut-off events. [2024-06-27 23:48:21,375 INFO L125 PetriNetUnfolderBase]: For 280647/280647 co-relation queries the response was YES. [2024-06-27 23:48:21,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45720 conditions, 6249 events. 3738/6249 cut-off events. For 280647/280647 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42032 event pairs, 1141 based on Foata normal form. 2/6236 useless extension candidates. Maximal degree in co-relation 45612. Up to 5571 conditions per place. [2024-06-27 23:48:21,444 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 66 changer transitions 0/395 dead transitions. [2024-06-27 23:48:21,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 395 transitions, 6574 flow [2024-06-27 23:48:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:48:21,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-27 23:48:21,445 INFO L175 Difference]: Start difference. First operand has 224 places, 379 transitions, 5752 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:48:21,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 395 transitions, 6574 flow [2024-06-27 23:48:21,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 395 transitions, 6341 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:21,969 INFO L231 Difference]: Finished difference. Result has 226 places, 379 transitions, 5661 flow [2024-06-27 23:48:21,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5661, PETRI_PLACES=226, PETRI_TRANSITIONS=379} [2024-06-27 23:48:21,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 23:48:21,970 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 379 transitions, 5661 flow [2024-06-27 23:48:21,970 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 23:48:21,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:21,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:21,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:48:21,971 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:21,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1076041400, now seen corresponding path program 4 times [2024-06-27 23:48:21,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:21,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396375066] [2024-06-27 23:48:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:22,908 INFO 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 23:48:22,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:22,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396375066] [2024-06-27 23:48:22,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396375066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:22,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:22,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:22,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490145543] [2024-06-27 23:48:22,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:22,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:22,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:22,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:22,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 379 transitions, 5661 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 23:48:22,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:22,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:22,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:24,106 INFO L124 PetriNetUnfolderBase]: 3759/6276 cut-off events. [2024-06-27 23:48:24,107 INFO L125 PetriNetUnfolderBase]: For 289829/289829 co-relation queries the response was YES. [2024-06-27 23:48:24,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46115 conditions, 6276 events. 3759/6276 cut-off events. For 289829/289829 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42085 event pairs, 1135 based on Foata normal form. 1/6262 useless extension candidates. Maximal degree in co-relation 46006. Up to 5570 conditions per place. [2024-06-27 23:48:24,180 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 298 selfloop transitions, 83 changer transitions 0/400 dead transitions. [2024-06-27 23:48:24,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 400 transitions, 6689 flow [2024-06-27 23:48:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:48:24,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-27 23:48:24,181 INFO L175 Difference]: Start difference. First operand has 226 places, 379 transitions, 5661 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:48:24,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 400 transitions, 6689 flow [2024-06-27 23:48:24,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 400 transitions, 6458 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:24,640 INFO L231 Difference]: Finished difference. Result has 229 places, 386 transitions, 5761 flow [2024-06-27 23:48:24,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5430, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5761, PETRI_PLACES=229, PETRI_TRANSITIONS=386} [2024-06-27 23:48:24,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 23:48:24,641 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 386 transitions, 5761 flow [2024-06-27 23:48:24,641 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 23:48:24,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:24,641 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 23:48:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:48:24,642 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:24,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1219724540, now seen corresponding path program 5 times [2024-06-27 23:48:24,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:24,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577659573] [2024-06-27 23:48:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:24,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:25,648 INFO 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 23:48:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577659573] [2024-06-27 23:48:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577659573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:25,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:25,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145446557] [2024-06-27 23:48:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:25,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:25,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 386 transitions, 5761 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 23:48:25,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:25,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:25,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:26,792 INFO L124 PetriNetUnfolderBase]: 3761/6290 cut-off events. [2024-06-27 23:48:26,792 INFO L125 PetriNetUnfolderBase]: For 301237/301240 co-relation queries the response was YES. [2024-06-27 23:48:26,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46189 conditions, 6290 events. 3761/6290 cut-off events. For 301237/301240 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42309 event pairs, 1163 based on Foata normal form. 4/6274 useless extension candidates. Maximal degree in co-relation 46078. Up to 5439 conditions per place. [2024-06-27 23:48:26,862 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 266 selfloop transitions, 116 changer transitions 0/401 dead transitions. [2024-06-27 23:48:26,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 401 transitions, 6820 flow [2024-06-27 23:48:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 23:48:26,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-27 23:48:26,864 INFO L175 Difference]: Start difference. First operand has 229 places, 386 transitions, 5761 flow. Second operand 7 states and 139 transitions. [2024-06-27 23:48:26,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 401 transitions, 6820 flow [2024-06-27 23:48:27,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 401 transitions, 6652 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:27,340 INFO L231 Difference]: Finished difference. Result has 232 places, 389 transitions, 5885 flow [2024-06-27 23:48:27,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5885, PETRI_PLACES=232, PETRI_TRANSITIONS=389} [2024-06-27 23:48:27,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-27 23:48:27,340 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 389 transitions, 5885 flow [2024-06-27 23:48:27,340 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 23:48:27,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:27,341 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 23:48:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:48:27,341 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:27,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash -960073004, now seen corresponding path program 6 times [2024-06-27 23:48:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170527655] [2024-06-27 23:48:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:28,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170527655] [2024-06-27 23:48:28,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170527655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:28,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:28,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:28,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398220861] [2024-06-27 23:48:28,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:28,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:28,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:28,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:28,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:28,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 389 transitions, 5885 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 23:48:28,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:28,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:28,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:29,551 INFO L124 PetriNetUnfolderBase]: 3756/6282 cut-off events. [2024-06-27 23:48:29,551 INFO L125 PetriNetUnfolderBase]: For 307036/307039 co-relation queries the response was YES. [2024-06-27 23:48:29,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46352 conditions, 6282 events. 3756/6282 cut-off events. For 307036/307039 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42302 event pairs, 1163 based on Foata normal form. 3/6265 useless extension candidates. Maximal degree in co-relation 46240. Up to 5434 conditions per place. [2024-06-27 23:48:29,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 131 changer transitions 0/401 dead transitions. [2024-06-27 23:48:29,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 401 transitions, 6898 flow [2024-06-27 23:48:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:48:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:48:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 23:48:29,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 23:48:29,624 INFO L175 Difference]: Start difference. First operand has 232 places, 389 transitions, 5885 flow. Second operand 7 states and 138 transitions. [2024-06-27 23:48:29,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 401 transitions, 6898 flow [2024-06-27 23:48:30,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 401 transitions, 6626 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:30,144 INFO L231 Difference]: Finished difference. Result has 235 places, 389 transitions, 5881 flow [2024-06-27 23:48:30,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5881, PETRI_PLACES=235, PETRI_TRANSITIONS=389} [2024-06-27 23:48:30,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 23:48:30,145 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 389 transitions, 5881 flow [2024-06-27 23:48:30,146 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 23:48:30,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:30,146 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 23:48:30,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:48:30,146 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:30,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -965790551, now seen corresponding path program 4 times [2024-06-27 23:48:30,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:30,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435703187] [2024-06-27 23:48:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:30,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:31,295 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 23:48:31,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:31,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435703187] [2024-06-27 23:48:31,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435703187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:31,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:31,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:31,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766652142] [2024-06-27 23:48:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:31,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:31,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:31,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:31,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:31,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 389 transitions, 5881 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:31,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:31,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:31,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:32,535 INFO L124 PetriNetUnfolderBase]: 3854/6396 cut-off events. [2024-06-27 23:48:32,535 INFO L125 PetriNetUnfolderBase]: For 321950/321953 co-relation queries the response was YES. [2024-06-27 23:48:32,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47510 conditions, 6396 events. 3854/6396 cut-off events. For 321950/321953 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 42683 event pairs, 1186 based on Foata normal form. 4/6380 useless extension candidates. Maximal degree in co-relation 47397. Up to 5470 conditions per place. [2024-06-27 23:48:32,608 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 279 selfloop transitions, 136 changer transitions 0/420 dead transitions. [2024-06-27 23:48:32,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 420 transitions, 7456 flow [2024-06-27 23:48:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:48:32,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:48:32,609 INFO L175 Difference]: Start difference. First operand has 235 places, 389 transitions, 5881 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:48:32,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 420 transitions, 7456 flow [2024-06-27 23:48:33,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 420 transitions, 7236 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 23:48:33,174 INFO L231 Difference]: Finished difference. Result has 239 places, 404 transitions, 6301 flow [2024-06-27 23:48:33,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6301, PETRI_PLACES=239, PETRI_TRANSITIONS=404} [2024-06-27 23:48:33,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 23:48:33,175 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 404 transitions, 6301 flow [2024-06-27 23:48:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:33,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:33,176 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 23:48:33,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:48:33,176 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:33,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash -944592259, now seen corresponding path program 5 times [2024-06-27 23:48:33,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:33,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460655441] [2024-06-27 23:48:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:33,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:34,431 INFO 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 23:48:34,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460655441] [2024-06-27 23:48:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460655441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:34,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:34,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:34,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191514321] [2024-06-27 23:48:34,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:34,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:34,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:34,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 404 transitions, 6301 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:34,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:34,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:34,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:35,703 INFO L124 PetriNetUnfolderBase]: 3882/6442 cut-off events. [2024-06-27 23:48:35,703 INFO L125 PetriNetUnfolderBase]: For 340880/340883 co-relation queries the response was YES. [2024-06-27 23:48:35,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49123 conditions, 6442 events. 3882/6442 cut-off events. For 340880/340883 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43146 event pairs, 1188 based on Foata normal form. 4/6426 useless extension candidates. Maximal degree in co-relation 49008. Up to 5498 conditions per place. [2024-06-27 23:48:35,775 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 139 changer transitions 0/428 dead transitions. [2024-06-27 23:48:35,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 428 transitions, 7790 flow [2024-06-27 23:48:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:48:35,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:48:35,777 INFO L175 Difference]: Start difference. First operand has 239 places, 404 transitions, 6301 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:48:35,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 428 transitions, 7790 flow [2024-06-27 23:48:36,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 428 transitions, 7561 flow, removed 91 selfloop flow, removed 2 redundant places. [2024-06-27 23:48:36,366 INFO L231 Difference]: Finished difference. Result has 246 places, 412 transitions, 6573 flow [2024-06-27 23:48:36,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6116, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6573, PETRI_PLACES=246, PETRI_TRANSITIONS=412} [2024-06-27 23:48:36,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-27 23:48:36,367 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 412 transitions, 6573 flow [2024-06-27 23:48:36,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:36,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:36,368 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 23:48:36,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:48:36,368 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:36,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -952446508, now seen corresponding path program 2 times [2024-06-27 23:48:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:36,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110743087] [2024-06-27 23:48:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:36,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:37,498 INFO 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 23:48:37,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:37,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110743087] [2024-06-27 23:48:37,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110743087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:37,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:37,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:37,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486027174] [2024-06-27 23:48:37,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:37,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:37,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:37,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:37,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:37,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 412 transitions, 6573 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:37,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:37,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:37,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:38,716 INFO L124 PetriNetUnfolderBase]: 3887/6441 cut-off events. [2024-06-27 23:48:38,716 INFO L125 PetriNetUnfolderBase]: For 343609/343615 co-relation queries the response was YES. [2024-06-27 23:48:38,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48996 conditions, 6441 events. 3887/6441 cut-off events. For 343609/343615 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43019 event pairs, 1310 based on Foata normal form. 5/6441 useless extension candidates. Maximal degree in co-relation 48878. Up to 5972 conditions per place. [2024-06-27 23:48:38,793 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 368 selfloop transitions, 58 changer transitions 0/431 dead transitions. [2024-06-27 23:48:38,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 431 transitions, 7735 flow [2024-06-27 23:48:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 23:48:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 23:48:38,794 INFO L175 Difference]: Start difference. First operand has 246 places, 412 transitions, 6573 flow. Second operand 8 states and 140 transitions. [2024-06-27 23:48:38,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 431 transitions, 7735 flow [2024-06-27 23:48:39,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 431 transitions, 7431 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:39,530 INFO L231 Difference]: Finished difference. Result has 251 places, 420 transitions, 6583 flow [2024-06-27 23:48:39,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6583, PETRI_PLACES=251, PETRI_TRANSITIONS=420} [2024-06-27 23:48:39,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-27 23:48:39,531 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 420 transitions, 6583 flow [2024-06-27 23:48:39,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:39,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:39,531 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 23:48:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:48:39,531 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:39,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash -965778988, now seen corresponding path program 3 times [2024-06-27 23:48:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:39,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992160184] [2024-06-27 23:48:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:40,843 INFO 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 23:48:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992160184] [2024-06-27 23:48:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992160184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:40,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487690874] [2024-06-27 23:48:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:40,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:40,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:40,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:40,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 420 transitions, 6583 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:40,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:40,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:40,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:42,253 INFO L124 PetriNetUnfolderBase]: 3900/6459 cut-off events. [2024-06-27 23:48:42,254 INFO L125 PetriNetUnfolderBase]: For 357136/357142 co-relation queries the response was YES. [2024-06-27 23:48:42,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49319 conditions, 6459 events. 3900/6459 cut-off events. For 357136/357142 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43115 event pairs, 1310 based on Foata normal form. 5/6459 useless extension candidates. Maximal degree in co-relation 49199. Up to 5987 conditions per place. [2024-06-27 23:48:42,324 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 57 changer transitions 0/438 dead transitions. [2024-06-27 23:48:42,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 438 transitions, 7887 flow [2024-06-27 23:48:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 23:48:42,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:48:42,325 INFO L175 Difference]: Start difference. First operand has 251 places, 420 transitions, 6583 flow. Second operand 9 states and 153 transitions. [2024-06-27 23:48:42,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 438 transitions, 7887 flow [2024-06-27 23:48:42,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 438 transitions, 7694 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:42,986 INFO L231 Difference]: Finished difference. Result has 256 places, 426 transitions, 6688 flow [2024-06-27 23:48:42,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6688, PETRI_PLACES=256, PETRI_TRANSITIONS=426} [2024-06-27 23:48:42,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 23:48:42,987 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 426 transitions, 6688 flow [2024-06-27 23:48:42,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:42,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:42,988 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 23:48:42,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:48:42,988 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 23:48:42,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash -952892381, now seen corresponding path program 6 times [2024-06-27 23:48:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:42,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386783617] [2024-06-27 23:48:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:42,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:44,167 INFO 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 23:48:44,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:44,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386783617] [2024-06-27 23:48:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386783617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:44,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:44,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256167285] [2024-06-27 23:48:44,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:44,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:44,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:44,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 426 transitions, 6688 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:44,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:44,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:44,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:45,540 INFO L124 PetriNetUnfolderBase]: 3896/6461 cut-off events. [2024-06-27 23:48:45,541 INFO L125 PetriNetUnfolderBase]: For 364952/364955 co-relation queries the response was YES. [2024-06-27 23:48:45,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49311 conditions, 6461 events. 3896/6461 cut-off events. For 364952/364955 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43136 event pairs, 1184 based on Foata normal form. 4/6445 useless extension candidates. Maximal degree in co-relation 49189. Up to 5521 conditions per place. [2024-06-27 23:48:45,618 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 278 selfloop transitions, 159 changer transitions 0/442 dead transitions. [2024-06-27 23:48:45,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 442 transitions, 8031 flow [2024-06-27 23:48:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:48:45,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:48:45,620 INFO L175 Difference]: Start difference. First operand has 256 places, 426 transitions, 6688 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:48:45,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 442 transitions, 8031 flow [2024-06-27 23:48:46,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 442 transitions, 7864 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-27 23:48:46,345 INFO L231 Difference]: Finished difference. Result has 260 places, 426 transitions, 6847 flow [2024-06-27 23:48:46,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6847, PETRI_PLACES=260, PETRI_TRANSITIONS=426} [2024-06-27 23:48:46,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 23:48:46,346 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 426 transitions, 6847 flow [2024-06-27 23:48:46,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:46,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:46,347 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 23:48:46,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:48:46,347 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 23:48:46,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash -952891978, now seen corresponding path program 4 times [2024-06-27 23:48:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:46,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420447303] [2024-06-27 23:48:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420447303] [2024-06-27 23:48:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420447303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:47,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:47,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108859521] [2024-06-27 23:48:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:47,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:47,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:47,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 426 transitions, 6847 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:47,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:47,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:47,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:48,750 INFO L124 PetriNetUnfolderBase]: 3893/6451 cut-off events. [2024-06-27 23:48:48,750 INFO L125 PetriNetUnfolderBase]: For 373109/373115 co-relation queries the response was YES. [2024-06-27 23:48:48,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49709 conditions, 6451 events. 3893/6451 cut-off events. For 373109/373115 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43052 event pairs, 1308 based on Foata normal form. 5/6451 useless extension candidates. Maximal degree in co-relation 49586. Up to 5979 conditions per place. [2024-06-27 23:48:48,832 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 60 changer transitions 0/437 dead transitions. [2024-06-27 23:48:48,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 437 transitions, 7859 flow [2024-06-27 23:48:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:48:48,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 23:48:48,834 INFO L175 Difference]: Start difference. First operand has 260 places, 426 transitions, 6847 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:48:48,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 437 transitions, 7859 flow [2024-06-27 23:48:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 437 transitions, 7473 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 23:48:49,652 INFO L231 Difference]: Finished difference. Result has 260 places, 426 transitions, 6587 flow [2024-06-27 23:48:49,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6461, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6587, PETRI_PLACES=260, PETRI_TRANSITIONS=426} [2024-06-27 23:48:49,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 23:48:49,653 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 426 transitions, 6587 flow [2024-06-27 23:48:49,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:49,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:49,653 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 23:48:49,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:48:49,653 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 23:48:49,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash -103393972, now seen corresponding path program 7 times [2024-06-27 23:48:49,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:49,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130466280] [2024-06-27 23:48:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:49,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130466280] [2024-06-27 23:48:50,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130466280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:50,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:50,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647039206] [2024-06-27 23:48:50,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:50,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:50,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:50,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:50,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 426 transitions, 6587 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 23:48:50,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:50,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:50,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:51,975 INFO L124 PetriNetUnfolderBase]: 3839/6397 cut-off events. [2024-06-27 23:48:51,975 INFO L125 PetriNetUnfolderBase]: For 380418/380421 co-relation queries the response was YES. [2024-06-27 23:48:52,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48999 conditions, 6397 events. 3839/6397 cut-off events. For 380418/380421 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42947 event pairs, 1128 based on Foata normal form. 4/6398 useless extension candidates. Maximal degree in co-relation 48877. Up to 5681 conditions per place. [2024-06-27 23:48:52,053 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 66 changer transitions 0/453 dead transitions. [2024-06-27 23:48:52,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 453 transitions, 7592 flow [2024-06-27 23:48:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:48:52,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:48:52,054 INFO L175 Difference]: Start difference. First operand has 260 places, 426 transitions, 6587 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:48:52,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 453 transitions, 7592 flow [2024-06-27 23:48:52,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 453 transitions, 7454 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 23:48:52,668 INFO L231 Difference]: Finished difference. Result has 262 places, 431 transitions, 6675 flow [2024-06-27 23:48:52,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6675, PETRI_PLACES=262, PETRI_TRANSITIONS=431} [2024-06-27 23:48:52,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 23:48:52,669 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 431 transitions, 6675 flow [2024-06-27 23:48:52,669 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 23:48:52,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:52,669 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 23:48:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:48:52,669 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 23:48:52,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1040859607, now seen corresponding path program 7 times [2024-06-27 23:48:52,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:52,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111424143] [2024-06-27 23:48:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:53,670 INFO 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 23:48:53,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:53,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111424143] [2024-06-27 23:48:53,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111424143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:53,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:53,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:48:53,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844229474] [2024-06-27 23:48:53,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:53,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:48:53,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:53,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:48:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:48:53,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:48:53,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 431 transitions, 6675 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:53,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:48:53,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:55,041 INFO L124 PetriNetUnfolderBase]: 3917/6491 cut-off events. [2024-06-27 23:48:55,041 INFO L125 PetriNetUnfolderBase]: For 392379/392384 co-relation queries the response was YES. [2024-06-27 23:48:55,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49798 conditions, 6491 events. 3917/6491 cut-off events. For 392379/392384 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43501 event pairs, 1181 based on Foata normal form. 6/6494 useless extension candidates. Maximal degree in co-relation 49675. Up to 5879 conditions per place. [2024-06-27 23:48:55,118 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 377 selfloop transitions, 83 changer transitions 0/465 dead transitions. [2024-06-27 23:48:55,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 465 transitions, 7828 flow [2024-06-27 23:48:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:48:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:48:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:48:55,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 23:48:55,120 INFO L175 Difference]: Start difference. First operand has 262 places, 431 transitions, 6675 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:48:55,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 465 transitions, 7828 flow [2024-06-27 23:48:55,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 465 transitions, 7718 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:55,944 INFO L231 Difference]: Finished difference. Result has 267 places, 441 transitions, 6945 flow [2024-06-27 23:48:55,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6566, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6945, PETRI_PLACES=267, PETRI_TRANSITIONS=441} [2024-06-27 23:48:55,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 23:48:55,945 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 441 transitions, 6945 flow [2024-06-27 23:48:55,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:48:55,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:55,946 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 23:48:55,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:48:55,946 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 23:48:55,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1817696404, now seen corresponding path program 8 times [2024-06-27 23:48:55,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:55,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458749708] [2024-06-27 23:48:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:55,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:56,918 INFO 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 23:48:56,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458749708] [2024-06-27 23:48:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458749708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:56,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:56,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:48:56,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804121260] [2024-06-27 23:48:56,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:56,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:48:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:56,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:48:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:48:56,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:48:56,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 441 transitions, 6945 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 23:48:56,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:56,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:48:56,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:58,300 INFO L124 PetriNetUnfolderBase]: 3851/6418 cut-off events. [2024-06-27 23:48:58,300 INFO L125 PetriNetUnfolderBase]: For 404006/404009 co-relation queries the response was YES. [2024-06-27 23:48:58,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49742 conditions, 6418 events. 3851/6418 cut-off events. For 404006/404009 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43277 event pairs, 1141 based on Foata normal form. 4/6419 useless extension candidates. Maximal degree in co-relation 49617. Up to 5606 conditions per place. [2024-06-27 23:48:58,381 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 100 changer transitions 0/459 dead transitions. [2024-06-27 23:48:58,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 459 transitions, 7865 flow [2024-06-27 23:48:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:48:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:48:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:48:58,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:48:58,382 INFO L175 Difference]: Start difference. First operand has 267 places, 441 transitions, 6945 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:48:58,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 459 transitions, 7865 flow [2024-06-27 23:48:59,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 459 transitions, 7567 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 23:48:59,332 INFO L231 Difference]: Finished difference. Result has 270 places, 441 transitions, 6866 flow [2024-06-27 23:48:59,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6647, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6866, PETRI_PLACES=270, PETRI_TRANSITIONS=441} [2024-06-27 23:48:59,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 23:48:59,343 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 441 transitions, 6866 flow [2024-06-27 23:48:59,343 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 23:48:59,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:59,343 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 23:48:59,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:48:59,344 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 23:48:59,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash -73165909, now seen corresponding path program 8 times [2024-06-27 23:48:59,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:59,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944479860] [2024-06-27 23:48:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:59,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:00,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:00,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944479860] [2024-06-27 23:49:00,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944479860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:00,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:00,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:00,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997101262] [2024-06-27 23:49:00,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:00,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:00,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:00,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:00,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 441 transitions, 6866 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:00,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:00,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:00,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:01,796 INFO L124 PetriNetUnfolderBase]: 3934/6516 cut-off events. [2024-06-27 23:49:01,797 INFO L125 PetriNetUnfolderBase]: For 412952/412957 co-relation queries the response was YES. [2024-06-27 23:49:01,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50404 conditions, 6516 events. 3934/6516 cut-off events. For 412952/412957 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 43589 event pairs, 1154 based on Foata normal form. 6/6519 useless extension candidates. Maximal degree in co-relation 50278. Up to 5896 conditions per place. [2024-06-27 23:49:01,878 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 386 selfloop transitions, 83 changer transitions 0/474 dead transitions. [2024-06-27 23:49:01,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 474 transitions, 8052 flow [2024-06-27 23:49:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:49:01,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:49:01,880 INFO L175 Difference]: Start difference. First operand has 270 places, 441 transitions, 6866 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:49:01,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 474 transitions, 8052 flow [2024-06-27 23:49:02,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 474 transitions, 7890 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:49:02,731 INFO L231 Difference]: Finished difference. Result has 273 places, 452 transitions, 7089 flow [2024-06-27 23:49:02,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6704, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7089, PETRI_PLACES=273, PETRI_TRANSITIONS=452} [2024-06-27 23:49:02,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 23:49:02,732 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 452 transitions, 7089 flow [2024-06-27 23:49:02,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:02,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:02,732 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 23:49:02,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:49:02,733 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:02,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:02,733 INFO L85 PathProgramCache]: Analyzing trace with hash -464152522, now seen corresponding path program 5 times [2024-06-27 23:49:02,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:02,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019303160] [2024-06-27 23:49:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:02,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:03,798 INFO 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 23:49:03,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:03,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019303160] [2024-06-27 23:49:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019303160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:03,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:03,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:03,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044223175] [2024-06-27 23:49:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:03,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:03,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:03,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 452 transitions, 7089 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:03,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:03,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:03,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:05,282 INFO L124 PetriNetUnfolderBase]: 3936/6517 cut-off events. [2024-06-27 23:49:05,282 INFO L125 PetriNetUnfolderBase]: For 421619/421621 co-relation queries the response was YES. [2024-06-27 23:49:05,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50645 conditions, 6517 events. 3936/6517 cut-off events. For 421619/421621 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43500 event pairs, 1427 based on Foata normal form. 3/6518 useless extension candidates. Maximal degree in co-relation 50518. Up to 6076 conditions per place. [2024-06-27 23:49:05,357 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 36 changer transitions 0/475 dead transitions. [2024-06-27 23:49:05,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 475 transitions, 8123 flow [2024-06-27 23:49:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:49:05,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:49:05,358 INFO L175 Difference]: Start difference. First operand has 273 places, 452 transitions, 7089 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:49:05,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 475 transitions, 8123 flow [2024-06-27 23:49:06,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 475 transitions, 7890 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 23:49:06,168 INFO L231 Difference]: Finished difference. Result has 276 places, 456 transitions, 6982 flow [2024-06-27 23:49:06,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6982, PETRI_PLACES=276, PETRI_TRANSITIONS=456} [2024-06-27 23:49:06,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 23:49:06,169 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 456 transitions, 6982 flow [2024-06-27 23:49:06,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:06,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:06,169 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 23:49:06,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:49:06,170 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:06,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1817703937, now seen corresponding path program 9 times [2024-06-27 23:49:06,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:06,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250457957] [2024-06-27 23:49:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:07,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250457957] [2024-06-27 23:49:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250457957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:07,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:07,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542301364] [2024-06-27 23:49:07,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:07,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:07,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:07,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:07,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 456 transitions, 6982 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:07,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:07,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:07,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:08,729 INFO L124 PetriNetUnfolderBase]: 3986/6593 cut-off events. [2024-06-27 23:49:08,729 INFO L125 PetriNetUnfolderBase]: For 438470/438473 co-relation queries the response was YES. [2024-06-27 23:49:08,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51183 conditions, 6593 events. 3986/6593 cut-off events. For 438470/438473 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44064 event pairs, 1164 based on Foata normal form. 4/6594 useless extension candidates. Maximal degree in co-relation 51055. Up to 5797 conditions per place. [2024-06-27 23:49:08,810 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 363 selfloop transitions, 126 changer transitions 0/494 dead transitions. [2024-06-27 23:49:08,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 494 transitions, 8487 flow [2024-06-27 23:49:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:49:08,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:49:08,812 INFO L175 Difference]: Start difference. First operand has 276 places, 456 transitions, 6982 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:49:08,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 494 transitions, 8487 flow [2024-06-27 23:49:09,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 494 transitions, 8421 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:09,785 INFO L231 Difference]: Finished difference. Result has 279 places, 472 transitions, 7532 flow [2024-06-27 23:49:09,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6916, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7532, PETRI_PLACES=279, PETRI_TRANSITIONS=472} [2024-06-27 23:49:09,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 23:49:09,786 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 472 transitions, 7532 flow [2024-06-27 23:49:09,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:09,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:09,786 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 23:49:09,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:49:09,787 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:09,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1817692777, now seen corresponding path program 10 times [2024-06-27 23:49:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:09,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651984832] [2024-06-27 23:49:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:09,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:10,791 INFO 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 23:49:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651984832] [2024-06-27 23:49:10,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651984832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:10,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:10,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:10,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384627010] [2024-06-27 23:49:10,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:10,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:10,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:10,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:10,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:10,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:10,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 472 transitions, 7532 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:10,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:10,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:10,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:12,239 INFO L124 PetriNetUnfolderBase]: 3988/6598 cut-off events. [2024-06-27 23:49:12,240 INFO L125 PetriNetUnfolderBase]: For 452493/452496 co-relation queries the response was YES. [2024-06-27 23:49:12,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52031 conditions, 6598 events. 3988/6598 cut-off events. For 452493/452496 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 44168 event pairs, 1165 based on Foata normal form. 4/6599 useless extension candidates. Maximal degree in co-relation 51901. Up to 5801 conditions per place. [2024-06-27 23:49:12,321 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 364 selfloop transitions, 128 changer transitions 0/497 dead transitions. [2024-06-27 23:49:12,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 497 transitions, 8839 flow [2024-06-27 23:49:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:49:12,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:49:12,323 INFO L175 Difference]: Start difference. First operand has 279 places, 472 transitions, 7532 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:49:12,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 497 transitions, 8839 flow [2024-06-27 23:49:13,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 497 transitions, 8326 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-27 23:49:13,201 INFO L231 Difference]: Finished difference. Result has 280 places, 477 transitions, 7422 flow [2024-06-27 23:49:13,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7032, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7422, PETRI_PLACES=280, PETRI_TRANSITIONS=477} [2024-06-27 23:49:13,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 23:49:13,202 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 477 transitions, 7422 flow [2024-06-27 23:49:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:13,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:13,202 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 23:49:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:49:13,202 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:13,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash -849662255, now seen corresponding path program 1 times [2024-06-27 23:49:13,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:13,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926982805] [2024-06-27 23:49:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:14,509 INFO 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 23:49:14,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:14,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926982805] [2024-06-27 23:49:14,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926982805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:14,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:14,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:14,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492464193] [2024-06-27 23:49:14,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:14,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:14,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:14,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 477 transitions, 7422 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 23:49:14,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:14,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:14,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:15,972 INFO L124 PetriNetUnfolderBase]: 3910/6516 cut-off events. [2024-06-27 23:49:15,972 INFO L125 PetriNetUnfolderBase]: For 462568/462568 co-relation queries the response was YES. [2024-06-27 23:49:16,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51556 conditions, 6516 events. 3910/6516 cut-off events. For 462568/462568 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 43938 event pairs, 1554 based on Foata normal form. 1/6515 useless extension candidates. Maximal degree in co-relation 51425. Up to 6006 conditions per place. [2024-06-27 23:49:16,053 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 19 changer transitions 0/496 dead transitions. [2024-06-27 23:49:16,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 496 transitions, 8496 flow [2024-06-27 23:49:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:49:16,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:49:16,054 INFO L175 Difference]: Start difference. First operand has 280 places, 477 transitions, 7422 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:49:16,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 496 transitions, 8496 flow [2024-06-27 23:49:16,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 496 transitions, 8233 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 23:49:16,801 INFO L231 Difference]: Finished difference. Result has 283 places, 480 transitions, 7265 flow [2024-06-27 23:49:16,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7265, PETRI_PLACES=283, PETRI_TRANSITIONS=480} [2024-06-27 23:49:16,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 23:49:16,802 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 480 transitions, 7265 flow [2024-06-27 23:49:16,802 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 23:49:16,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:16,802 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 23:49:16,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:49:16,802 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 23:49:16,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1076049491, now seen corresponding path program 2 times [2024-06-27 23:49:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:16,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989533459] [2024-06-27 23:49:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:16,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:18,306 INFO 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 23:49:18,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:18,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989533459] [2024-06-27 23:49:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989533459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:18,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023196096] [2024-06-27 23:49:18,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:18,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:18,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:18,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 480 transitions, 7265 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 23:49:18,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:18,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:19,869 INFO L124 PetriNetUnfolderBase]: 3923/6540 cut-off events. [2024-06-27 23:49:19,869 INFO L125 PetriNetUnfolderBase]: For 475313/475313 co-relation queries the response was YES. [2024-06-27 23:49:19,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51984 conditions, 6540 events. 3923/6540 cut-off events. For 475313/475313 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 44094 event pairs, 1556 based on Foata normal form. 1/6539 useless extension candidates. Maximal degree in co-relation 51852. Up to 6008 conditions per place. [2024-06-27 23:49:19,950 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 31 changer transitions 0/500 dead transitions. [2024-06-27 23:49:19,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 500 transitions, 8541 flow [2024-06-27 23:49:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:49:19,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:49:19,952 INFO L175 Difference]: Start difference. First operand has 283 places, 480 transitions, 7265 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:49:19,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 500 transitions, 8541 flow [2024-06-27 23:49:20,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 500 transitions, 8455 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:20,934 INFO L231 Difference]: Finished difference. Result has 284 places, 486 transitions, 7377 flow [2024-06-27 23:49:20,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7179, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7377, PETRI_PLACES=284, PETRI_TRANSITIONS=486} [2024-06-27 23:49:20,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-27 23:49:20,934 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 486 transitions, 7377 flow [2024-06-27 23:49:20,934 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 23:49:20,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:20,935 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 23:49:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:49:20,935 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 23:49:20,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2144125585, now seen corresponding path program 3 times [2024-06-27 23:49:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959483580] [2024-06-27 23:49:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:20,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:22,279 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 23:49:22,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:22,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959483580] [2024-06-27 23:49:22,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959483580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:22,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:22,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165633541] [2024-06-27 23:49:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:22,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:22,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:22,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 486 transitions, 7377 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 23:49:22,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:22,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:22,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:23,780 INFO L124 PetriNetUnfolderBase]: 3920/6536 cut-off events. [2024-06-27 23:49:23,781 INFO L125 PetriNetUnfolderBase]: For 487571/487571 co-relation queries the response was YES. [2024-06-27 23:49:23,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52473 conditions, 6536 events. 3920/6536 cut-off events. For 487571/487571 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 44070 event pairs, 1556 based on Foata normal form. 1/6535 useless extension candidates. Maximal degree in co-relation 52340. Up to 6005 conditions per place. [2024-06-27 23:49:23,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 32 changer transitions 0/499 dead transitions. [2024-06-27 23:49:23,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 499 transitions, 8389 flow [2024-06-27 23:49:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 23:49:23,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:49:23,871 INFO L175 Difference]: Start difference. First operand has 284 places, 486 transitions, 7377 flow. Second operand 8 states and 147 transitions. [2024-06-27 23:49:23,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 499 transitions, 8389 flow [2024-06-27 23:49:25,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 499 transitions, 8243 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 23:49:25,041 INFO L231 Difference]: Finished difference. Result has 287 places, 486 transitions, 7301 flow [2024-06-27 23:49:25,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7231, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7301, PETRI_PLACES=287, PETRI_TRANSITIONS=486} [2024-06-27 23:49:25,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 23:49:25,042 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 486 transitions, 7301 flow [2024-06-27 23:49:25,042 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 23:49:25,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:25,042 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 23:49:25,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:49:25,042 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 23:49:25,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2138798356, now seen corresponding path program 1 times [2024-06-27 23:49:25,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:25,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674597772] [2024-06-27 23:49:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:25,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:26,168 INFO 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 23:49:26,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:26,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674597772] [2024-06-27 23:49:26,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674597772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:26,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:26,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:26,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088081885] [2024-06-27 23:49:26,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:26,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:26,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:26,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 486 transitions, 7301 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 23:49:26,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:26,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:26,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:27,701 INFO L124 PetriNetUnfolderBase]: 3925/6545 cut-off events. [2024-06-27 23:49:27,701 INFO L125 PetriNetUnfolderBase]: For 500575/500575 co-relation queries the response was YES. [2024-06-27 23:49:27,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52567 conditions, 6545 events. 3925/6545 cut-off events. For 500575/500575 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44161 event pairs, 1555 based on Foata normal form. 2/6545 useless extension candidates. Maximal degree in co-relation 52433. Up to 6033 conditions per place. [2024-06-27 23:49:27,787 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 470 selfloop transitions, 19 changer transitions 0/502 dead transitions. [2024-06-27 23:49:27,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 502 transitions, 8371 flow [2024-06-27 23:49:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 23:49:27,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 23:49:27,788 INFO L175 Difference]: Start difference. First operand has 287 places, 486 transitions, 7301 flow. Second operand 9 states and 155 transitions. [2024-06-27 23:49:27,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 502 transitions, 8371 flow [2024-06-27 23:49:28,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 502 transitions, 8299 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:28,927 INFO L231 Difference]: Finished difference. Result has 289 places, 489 transitions, 7331 flow [2024-06-27 23:49:28,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7229, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7331, PETRI_PLACES=289, PETRI_TRANSITIONS=489} [2024-06-27 23:49:28,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 23:49:28,928 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 489 transitions, 7331 flow [2024-06-27 23:49:28,928 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 23:49:28,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:28,928 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 23:49:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:49:28,929 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 23:49:28,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash -952707466, now seen corresponding path program 2 times [2024-06-27 23:49:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929856235] [2024-06-27 23:49:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:30,010 INFO 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 23:49:30,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:30,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929856235] [2024-06-27 23:49:30,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929856235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:30,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:30,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567339886] [2024-06-27 23:49:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:30,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:30,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:30,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:30,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 489 transitions, 7331 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 23:49:30,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:30,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:30,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:31,622 INFO L124 PetriNetUnfolderBase]: 3946/6577 cut-off events. [2024-06-27 23:49:31,622 INFO L125 PetriNetUnfolderBase]: For 518682/518685 co-relation queries the response was YES. [2024-06-27 23:49:31,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53463 conditions, 6577 events. 3946/6577 cut-off events. For 518682/518685 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 44321 event pairs, 1559 based on Foata normal form. 4/6578 useless extension candidates. Maximal degree in co-relation 53328. Up to 6025 conditions per place. [2024-06-27 23:49:31,696 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 43 changer transitions 0/510 dead transitions. [2024-06-27 23:49:31,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 510 transitions, 8815 flow [2024-06-27 23:49:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:49:31,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:49:31,697 INFO L175 Difference]: Start difference. First operand has 289 places, 489 transitions, 7331 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:49:31,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 510 transitions, 8815 flow [2024-06-27 23:49:32,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 510 transitions, 8735 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:32,877 INFO L231 Difference]: Finished difference. Result has 291 places, 498 transitions, 7523 flow [2024-06-27 23:49:32,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7251, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7523, PETRI_PLACES=291, PETRI_TRANSITIONS=498} [2024-06-27 23:49:32,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 23:49:32,878 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 498 transitions, 7523 flow [2024-06-27 23:49:32,878 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 23:49:32,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:32,878 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 23:49:32,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:49:32,879 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:32,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:32,879 INFO L85 PathProgramCache]: Analyzing trace with hash -952707683, now seen corresponding path program 4 times [2024-06-27 23:49:32,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:32,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414406591] [2024-06-27 23:49:32,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:32,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414406591] [2024-06-27 23:49:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414406591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:34,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:34,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118815924] [2024-06-27 23:49:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:34,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:34,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 498 transitions, 7523 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:34,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:34,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:34,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:35,733 INFO L124 PetriNetUnfolderBase]: 4044/6676 cut-off events. [2024-06-27 23:49:35,733 INFO L125 PetriNetUnfolderBase]: For 536398/536398 co-relation queries the response was YES. [2024-06-27 23:49:35,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54763 conditions, 6676 events. 4044/6676 cut-off events. For 536398/536398 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 44643 event pairs, 1588 based on Foata normal form. 1/6672 useless extension candidates. Maximal degree in co-relation 54627. Up to 6201 conditions per place. [2024-06-27 23:49:35,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 459 selfloop transitions, 51 changer transitions 0/515 dead transitions. [2024-06-27 23:49:35,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 515 transitions, 8857 flow [2024-06-27 23:49:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 23:49:35,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 23:49:35,820 INFO L175 Difference]: Start difference. First operand has 291 places, 498 transitions, 7523 flow. Second operand 8 states and 141 transitions. [2024-06-27 23:49:35,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 515 transitions, 8857 flow [2024-06-27 23:49:36,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 515 transitions, 8774 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 23:49:36,824 INFO L231 Difference]: Finished difference. Result has 295 places, 504 transitions, 7694 flow [2024-06-27 23:49:36,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7694, PETRI_PLACES=295, PETRI_TRANSITIONS=504} [2024-06-27 23:49:36,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-27 23:49:36,825 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 504 transitions, 7694 flow [2024-06-27 23:49:36,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:36,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:36,825 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 23:49:36,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:49:36,825 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:36,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1081478738, now seen corresponding path program 3 times [2024-06-27 23:49:36,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:36,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076784876] [2024-06-27 23:49:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:36,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:37,926 INFO 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 23:49:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076784876] [2024-06-27 23:49:37,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076784876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:37,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:37,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539967806] [2024-06-27 23:49:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:37,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:37,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:37,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:37,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:38,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:38,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 504 transitions, 7694 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 23:49:38,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:38,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:38,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:39,381 INFO L124 PetriNetUnfolderBase]: 3919/6552 cut-off events. [2024-06-27 23:49:39,381 INFO L125 PetriNetUnfolderBase]: For 548079/548082 co-relation queries the response was YES. [2024-06-27 23:49:39,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54297 conditions, 6552 events. 3919/6552 cut-off events. For 548079/548082 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 44443 event pairs, 1547 based on Foata normal form. 4/6553 useless extension candidates. Maximal degree in co-relation 54159. Up to 6002 conditions per place. [2024-06-27 23:49:39,463 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 457 selfloop transitions, 45 changer transitions 0/515 dead transitions. [2024-06-27 23:49:39,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 515 transitions, 8874 flow [2024-06-27 23:49:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:49:39,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:49:39,464 INFO L175 Difference]: Start difference. First operand has 295 places, 504 transitions, 7694 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:49:39,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 515 transitions, 8874 flow [2024-06-27 23:49:40,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 515 transitions, 8733 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 23:49:40,410 INFO L231 Difference]: Finished difference. Result has 300 places, 504 transitions, 7650 flow [2024-06-27 23:49:40,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7553, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7650, PETRI_PLACES=300, PETRI_TRANSITIONS=504} [2024-06-27 23:49:40,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 23:49:40,411 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 504 transitions, 7650 flow [2024-06-27 23:49:40,411 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 23:49:40,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:40,411 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 23:49:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:49:40,411 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash -960059333, now seen corresponding path program 5 times [2024-06-27 23:49:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:40,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071122092] [2024-06-27 23:49:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:41,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:41,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071122092] [2024-06-27 23:49:41,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071122092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:41,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:41,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:41,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73648848] [2024-06-27 23:49:41,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:41,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:41,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:41,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 504 transitions, 7650 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:41,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:41,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:41,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:43,098 INFO L124 PetriNetUnfolderBase]: 4043/6677 cut-off events. [2024-06-27 23:49:43,098 INFO L125 PetriNetUnfolderBase]: For 557941/557941 co-relation queries the response was YES. [2024-06-27 23:49:43,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55386 conditions, 6677 events. 4043/6677 cut-off events. For 557941/557941 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 44661 event pairs, 1587 based on Foata normal form. 1/6673 useless extension candidates. Maximal degree in co-relation 55246. Up to 6199 conditions per place. [2024-06-27 23:49:43,190 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 51 changer transitions 0/518 dead transitions. [2024-06-27 23:49:43,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 518 transitions, 8928 flow [2024-06-27 23:49:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 23:49:43,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 23:49:43,192 INFO L175 Difference]: Start difference. First operand has 300 places, 504 transitions, 7650 flow. Second operand 8 states and 143 transitions. [2024-06-27 23:49:43,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 518 transitions, 8928 flow [2024-06-27 23:49:44,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 518 transitions, 8838 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:44,134 INFO L231 Difference]: Finished difference. Result has 301 places, 507 transitions, 7742 flow [2024-06-27 23:49:44,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7742, PETRI_PLACES=301, PETRI_TRANSITIONS=507} [2024-06-27 23:49:44,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 23:49:44,135 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 507 transitions, 7742 flow [2024-06-27 23:49:44,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:49:44,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:44,135 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 23:49:44,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:49:44,135 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:44,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1219940021, now seen corresponding path program 6 times [2024-06-27 23:49:44,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:44,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375735738] [2024-06-27 23:49:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:44,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:45,579 INFO 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 23:49:45,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375735738] [2024-06-27 23:49:45,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375735738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:45,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:45,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:45,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689621220] [2024-06-27 23:49:45,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:45,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:45,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:45,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:45,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 507 transitions, 7742 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 23:49:45,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:45,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:45,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:47,122 INFO L124 PetriNetUnfolderBase]: 3926/6559 cut-off events. [2024-06-27 23:49:47,122 INFO L125 PetriNetUnfolderBase]: For 567081/567081 co-relation queries the response was YES. [2024-06-27 23:49:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54610 conditions, 6559 events. 3926/6559 cut-off events. For 567081/567081 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 44397 event pairs, 1551 based on Foata normal form. 1/6555 useless extension candidates. Maximal degree in co-relation 54469. Up to 5993 conditions per place. [2024-06-27 23:49:47,215 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 52 changer transitions 0/517 dead transitions. [2024-06-27 23:49:47,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 517 transitions, 8778 flow [2024-06-27 23:49:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:49:47,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:49:47,216 INFO L175 Difference]: Start difference. First operand has 301 places, 507 transitions, 7742 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:49:47,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 517 transitions, 8778 flow [2024-06-27 23:49:48,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 517 transitions, 8515 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:48,287 INFO L231 Difference]: Finished difference. Result has 302 places, 507 transitions, 7589 flow [2024-06-27 23:49:48,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7589, PETRI_PLACES=302, PETRI_TRANSITIONS=507} [2024-06-27 23:49:48,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 23:49:48,288 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 507 transitions, 7589 flow [2024-06-27 23:49:48,288 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 23:49:48,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:48,288 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 23:49:48,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:49:48,289 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:48,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -960059116, now seen corresponding path program 4 times [2024-06-27 23:49:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:48,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588042992] [2024-06-27 23:49:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:48,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:49,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:49,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588042992] [2024-06-27 23:49:49,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588042992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:49,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:49,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:49,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390149698] [2024-06-27 23:49:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:49,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:49,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:49,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:49,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 507 transitions, 7589 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 23:49:49,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:49,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:49,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:50,898 INFO L124 PetriNetUnfolderBase]: 3920/6552 cut-off events. [2024-06-27 23:49:50,898 INFO L125 PetriNetUnfolderBase]: For 572545/572548 co-relation queries the response was YES. [2024-06-27 23:49:50,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53968 conditions, 6552 events. 3920/6552 cut-off events. For 572545/572548 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 44429 event pairs, 1546 based on Foata normal form. 4/6553 useless extension candidates. Maximal degree in co-relation 53827. Up to 6004 conditions per place. [2024-06-27 23:49:50,996 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 462 selfloop transitions, 42 changer transitions 0/517 dead transitions. [2024-06-27 23:49:50,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 517 transitions, 8625 flow [2024-06-27 23:49:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 23:49:50,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:49:50,997 INFO L175 Difference]: Start difference. First operand has 302 places, 507 transitions, 7589 flow. Second operand 8 states and 147 transitions. [2024-06-27 23:49:50,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 517 transitions, 8625 flow [2024-06-27 23:49:52,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 517 transitions, 8479 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 23:49:52,154 INFO L231 Difference]: Finished difference. Result has 303 places, 507 transitions, 7533 flow [2024-06-27 23:49:52,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7443, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7533, PETRI_PLACES=303, PETRI_TRANSITIONS=507} [2024-06-27 23:49:52,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 23:49:52,154 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 507 transitions, 7533 flow [2024-06-27 23:49:52,154 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 23:49:52,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:52,155 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 23:49:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:49:52,155 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 23:49:52,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash -952430636, now seen corresponding path program 1 times [2024-06-27 23:49:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130215462] [2024-06-27 23:49:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130215462] [2024-06-27 23:49:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130215462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:49:53,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021608881] [2024-06-27 23:49:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:49:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:49:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:49:53,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:49:53,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 507 transitions, 7533 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:53,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:53,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:49:53,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:55,443 INFO L124 PetriNetUnfolderBase]: 4031/6661 cut-off events. [2024-06-27 23:49:55,443 INFO L125 PetriNetUnfolderBase]: For 579565/579565 co-relation queries the response was YES. [2024-06-27 23:49:55,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54714 conditions, 6661 events. 4031/6661 cut-off events. For 579565/579565 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44622 event pairs, 1577 based on Foata normal form. 1/6660 useless extension candidates. Maximal degree in co-relation 54572. Up to 6235 conditions per place. [2024-06-27 23:49:55,551 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 494 selfloop transitions, 22 changer transitions 0/521 dead transitions. [2024-06-27 23:49:55,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 521 transitions, 8689 flow [2024-06-27 23:49:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 23:49:55,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 23:49:55,552 INFO L175 Difference]: Start difference. First operand has 303 places, 507 transitions, 7533 flow. Second operand 9 states and 148 transitions. [2024-06-27 23:49:55,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 521 transitions, 8689 flow [2024-06-27 23:49:56,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 521 transitions, 8561 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 23:49:56,867 INFO L231 Difference]: Finished difference. Result has 304 places, 510 transitions, 7555 flow [2024-06-27 23:49:56,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7405, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7555, PETRI_PLACES=304, PETRI_TRANSITIONS=510} [2024-06-27 23:49:56,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 23:49:56,868 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 510 transitions, 7555 flow [2024-06-27 23:49:56,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:56,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:56,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:49:56,869 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 23:49:56,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1800792532, now seen corresponding path program 1 times [2024-06-27 23:49:56,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:56,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912116767] [2024-06-27 23:49:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:58,141 INFO 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 23:49:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:58,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912116767] [2024-06-27 23:49:58,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912116767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:58,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:58,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37807334] [2024-06-27 23:49:58,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:58,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:58,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:58,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:58,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:58,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:49:58,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 510 transitions, 7555 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 23:49:58,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:58,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:49:58,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:59,946 INFO L124 PetriNetUnfolderBase]: 3980/6628 cut-off events. [2024-06-27 23:49:59,946 INFO L125 PetriNetUnfolderBase]: For 597498/597498 co-relation queries the response was YES. [2024-06-27 23:50:00,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54875 conditions, 6628 events. 3980/6628 cut-off events. For 597498/597498 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 44924 event pairs, 1097 based on Foata normal form. 2/6618 useless extension candidates. Maximal degree in co-relation 54732. Up to 5648 conditions per place. [2024-06-27 23:50:00,037 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 382 selfloop transitions, 110 changer transitions 0/533 dead transitions. [2024-06-27 23:50:00,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 533 transitions, 8711 flow [2024-06-27 23:50:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:50:00,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 23:50:00,039 INFO L175 Difference]: Start difference. First operand has 304 places, 510 transitions, 7555 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:50:00,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 533 transitions, 8711 flow [2024-06-27 23:50:01,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 533 transitions, 8467 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-27 23:50:01,213 INFO L231 Difference]: Finished difference. Result has 302 places, 514 transitions, 7635 flow [2024-06-27 23:50:01,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7311, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7635, PETRI_PLACES=302, PETRI_TRANSITIONS=514} [2024-06-27 23:50:01,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 23:50:01,214 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 514 transitions, 7635 flow [2024-06-27 23:50:01,214 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 23:50:01,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:01,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:01,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:50:01,214 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 23:50:01,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1800797368, now seen corresponding path program 1 times [2024-06-27 23:50:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:01,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956580968] [2024-06-27 23:50:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:01,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:02,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:02,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956580968] [2024-06-27 23:50:02,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956580968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:02,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534942766] [2024-06-27 23:50:02,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:02,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:02,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:02,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 514 transitions, 7635 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:50:02,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:02,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:02,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:03,961 INFO L124 PetriNetUnfolderBase]: 4061/6712 cut-off events. [2024-06-27 23:50:03,961 INFO L125 PetriNetUnfolderBase]: For 620614/620617 co-relation queries the response was YES. [2024-06-27 23:50:04,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56560 conditions, 6712 events. 4061/6712 cut-off events. For 620614/620617 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 45041 event pairs, 1200 based on Foata normal form. 6/6708 useless extension candidates. Maximal degree in co-relation 56417. Up to 6077 conditions per place. [2024-06-27 23:50:04,044 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 458 selfloop transitions, 75 changer transitions 0/538 dead transitions. [2024-06-27 23:50:04,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 538 transitions, 8920 flow [2024-06-27 23:50:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:50:04,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:50:04,045 INFO L175 Difference]: Start difference. First operand has 302 places, 514 transitions, 7635 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:50:04,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 538 transitions, 8920 flow [2024-06-27 23:50:05,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 538 transitions, 8675 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 23:50:05,192 INFO L231 Difference]: Finished difference. Result has 305 places, 522 transitions, 7723 flow [2024-06-27 23:50:05,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7390, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7723, PETRI_PLACES=305, PETRI_TRANSITIONS=522} [2024-06-27 23:50:05,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 23:50:05,193 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 522 transitions, 7723 flow [2024-06-27 23:50:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:50:05,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:05,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:05,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:50:05,193 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 23:50:05,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:05,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1428317884, now seen corresponding path program 2 times [2024-06-27 23:50:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312538947] [2024-06-27 23:50:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:06,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:06,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312538947] [2024-06-27 23:50:06,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312538947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:06,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:06,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351395605] [2024-06-27 23:50:06,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:06,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:06,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:06,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 522 transitions, 7723 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 23:50:06,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:06,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:06,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:08,245 INFO L124 PetriNetUnfolderBase]: 4018/6679 cut-off events. [2024-06-27 23:50:08,245 INFO L125 PetriNetUnfolderBase]: For 627591/627591 co-relation queries the response was YES. [2024-06-27 23:50:08,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56424 conditions, 6679 events. 4018/6679 cut-off events. For 627591/627591 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 45211 event pairs, 1106 based on Foata normal form. 2/6669 useless extension candidates. Maximal degree in co-relation 56280. Up to 5660 conditions per place. [2024-06-27 23:50:08,330 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 377 selfloop transitions, 123 changer transitions 0/543 dead transitions. [2024-06-27 23:50:08,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 543 transitions, 8897 flow [2024-06-27 23:50:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:50:08,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 23:50:08,335 INFO L175 Difference]: Start difference. First operand has 305 places, 522 transitions, 7723 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:50:08,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 543 transitions, 8897 flow [2024-06-27 23:50:09,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 543 transitions, 8682 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:09,299 INFO L231 Difference]: Finished difference. Result has 307 places, 526 transitions, 7865 flow [2024-06-27 23:50:09,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7508, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7865, PETRI_PLACES=307, PETRI_TRANSITIONS=526} [2024-06-27 23:50:09,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 23:50:09,300 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 526 transitions, 7865 flow [2024-06-27 23:50:09,300 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 23:50:09,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:09,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:09,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:50:09,300 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 23:50:09,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1076378536, now seen corresponding path program 3 times [2024-06-27 23:50:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228789948] [2024-06-27 23:50:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:10,626 INFO 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 23:50:10,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:10,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228789948] [2024-06-27 23:50:10,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228789948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:10,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:10,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341533072] [2024-06-27 23:50:10,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:10,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:10,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:10,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:10,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 526 transitions, 7865 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 23:50:10,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:10,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:12,296 INFO L124 PetriNetUnfolderBase]: 4051/6729 cut-off events. [2024-06-27 23:50:12,296 INFO L125 PetriNetUnfolderBase]: For 654633/654633 co-relation queries the response was YES. [2024-06-27 23:50:12,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58036 conditions, 6729 events. 4051/6729 cut-off events. For 654633/654633 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 45571 event pairs, 1084 based on Foata normal form. 2/6718 useless extension candidates. Maximal degree in co-relation 57891. Up to 5569 conditions per place. [2024-06-27 23:50:12,384 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 364 selfloop transitions, 144 changer transitions 0/551 dead transitions. [2024-06-27 23:50:12,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 551 transitions, 9307 flow [2024-06-27 23:50:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:50:12,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:50:12,386 INFO L175 Difference]: Start difference. First operand has 307 places, 526 transitions, 7865 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:50:12,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 551 transitions, 9307 flow [2024-06-27 23:50:13,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 551 transitions, 8982 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:13,503 INFO L231 Difference]: Finished difference. Result has 310 places, 536 transitions, 8107 flow [2024-06-27 23:50:13,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7540, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8107, PETRI_PLACES=310, PETRI_TRANSITIONS=536} [2024-06-27 23:50:13,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 23:50:13,503 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 536 transitions, 8107 flow [2024-06-27 23:50:13,504 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 23:50:13,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:13,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:13,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:50:13,504 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 23:50:13,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash -407974340, now seen corresponding path program 2 times [2024-06-27 23:50:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:13,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550456998] [2024-06-27 23:50:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:13,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:14,551 INFO 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 23:50:14,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:14,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550456998] [2024-06-27 23:50:14,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550456998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:14,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:14,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698350916] [2024-06-27 23:50:14,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:14,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:14,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 536 transitions, 8107 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:50:14,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:14,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:14,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:16,282 INFO L124 PetriNetUnfolderBase]: 4138/6823 cut-off events. [2024-06-27 23:50:16,282 INFO L125 PetriNetUnfolderBase]: For 686283/686286 co-relation queries the response was YES. [2024-06-27 23:50:16,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59981 conditions, 6823 events. 4138/6823 cut-off events. For 686283/686286 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 45716 event pairs, 1159 based on Foata normal form. 6/6819 useless extension candidates. Maximal degree in co-relation 59834. Up to 6004 conditions per place. [2024-06-27 23:50:16,378 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 422 selfloop transitions, 138 changer transitions 0/565 dead transitions. [2024-06-27 23:50:16,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 565 transitions, 9902 flow [2024-06-27 23:50:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:50:16,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:50:16,379 INFO L175 Difference]: Start difference. First operand has 310 places, 536 transitions, 8107 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:50:16,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 565 transitions, 9902 flow [2024-06-27 23:50:17,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 565 transitions, 9687 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:17,479 INFO L231 Difference]: Finished difference. Result has 315 places, 550 transitions, 8489 flow [2024-06-27 23:50:17,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7892, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8489, PETRI_PLACES=315, PETRI_TRANSITIONS=550} [2024-06-27 23:50:17,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 23:50:17,480 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 550 transitions, 8489 flow [2024-06-27 23:50:17,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:50:17,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:17,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:17,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:50:17,481 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:17,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:17,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1076371840, now seen corresponding path program 3 times [2024-06-27 23:50:17,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:17,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440916363] [2024-06-27 23:50:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:17,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:18,592 INFO 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 23:50:18,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:18,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440916363] [2024-06-27 23:50:18,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440916363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:18,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:18,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:18,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925807452] [2024-06-27 23:50:18,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:18,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:18,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:18,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:18,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:18,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 550 transitions, 8489 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:50:18,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:18,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:18,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:20,275 INFO L124 PetriNetUnfolderBase]: 4126/6809 cut-off events. [2024-06-27 23:50:20,275 INFO L125 PetriNetUnfolderBase]: For 684431/684434 co-relation queries the response was YES. [2024-06-27 23:50:20,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59981 conditions, 6809 events. 4126/6809 cut-off events. For 684431/684434 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 45654 event pairs, 1160 based on Foata normal form. 6/6805 useless extension candidates. Maximal degree in co-relation 59832. Up to 5994 conditions per place. [2024-06-27 23:50:20,363 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 420 selfloop transitions, 139 changer transitions 0/564 dead transitions. [2024-06-27 23:50:20,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 564 transitions, 9813 flow [2024-06-27 23:50:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:50:20,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:50:20,365 INFO L175 Difference]: Start difference. First operand has 315 places, 550 transitions, 8489 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:50:20,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 564 transitions, 9813 flow [2024-06-27 23:50:21,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 564 transitions, 9478 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-27 23:50:21,873 INFO L231 Difference]: Finished difference. Result has 318 places, 550 transitions, 8451 flow [2024-06-27 23:50:21,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8154, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8451, PETRI_PLACES=318, PETRI_TRANSITIONS=550} [2024-06-27 23:50:21,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 23:50:21,874 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 550 transitions, 8451 flow [2024-06-27 23:50:21,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:50:21,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:21,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:21,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:50:21,875 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:21,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1314569218, now seen corresponding path program 1 times [2024-06-27 23:50:21,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:21,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517006933] [2024-06-27 23:50:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:22,906 INFO 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 23:50:22,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517006933] [2024-06-27 23:50:22,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517006933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:22,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:22,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:22,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38031508] [2024-06-27 23:50:22,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:22,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:22,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:22,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:22,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 550 transitions, 8451 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 23:50:22,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:22,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:22,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:24,696 INFO L124 PetriNetUnfolderBase]: 4091/6773 cut-off events. [2024-06-27 23:50:24,696 INFO L125 PetriNetUnfolderBase]: For 705712/705715 co-relation queries the response was YES. [2024-06-27 23:50:24,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59993 conditions, 6773 events. 4091/6773 cut-off events. For 705712/705715 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 45823 event pairs, 1121 based on Foata normal form. 6/6756 useless extension candidates. Maximal degree in co-relation 59843. Up to 5868 conditions per place. [2024-06-27 23:50:24,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 465 selfloop transitions, 67 changer transitions 0/579 dead transitions. [2024-06-27 23:50:24,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 579 transitions, 9771 flow [2024-06-27 23:50:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:50:24,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 23:50:24,787 INFO L175 Difference]: Start difference. First operand has 318 places, 550 transitions, 8451 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:50:24,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 579 transitions, 9771 flow [2024-06-27 23:50:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 579 transitions, 9542 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:26,514 INFO L231 Difference]: Finished difference. Result has 322 places, 557 transitions, 8572 flow [2024-06-27 23:50:26,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8222, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8572, PETRI_PLACES=322, PETRI_TRANSITIONS=557} [2024-06-27 23:50:26,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 23:50:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 557 transitions, 8572 flow [2024-06-27 23:50:26,515 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 23:50:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:26,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:26,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:50:26,515 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:26,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:26,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1314330208, now seen corresponding path program 2 times [2024-06-27 23:50:26,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326862413] [2024-06-27 23:50:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:26,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326862413] [2024-06-27 23:50:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326862413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:27,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:27,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944312692] [2024-06-27 23:50:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:27,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:27,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:27,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:27,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 557 transitions, 8572 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 23:50:27,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:27,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:27,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:29,411 INFO L124 PetriNetUnfolderBase]: 4105/6805 cut-off events. [2024-06-27 23:50:29,412 INFO L125 PetriNetUnfolderBase]: For 722684/722687 co-relation queries the response was YES. [2024-06-27 23:50:29,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60807 conditions, 6805 events. 4105/6805 cut-off events. For 722684/722687 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 46004 event pairs, 1160 based on Foata normal form. 6/6801 useless extension candidates. Maximal degree in co-relation 60655. Up to 5966 conditions per place. [2024-06-27 23:50:29,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 458 selfloop transitions, 72 changer transitions 0/577 dead transitions. [2024-06-27 23:50:29,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 577 transitions, 9800 flow [2024-06-27 23:50:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:50:29,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 23:50:29,499 INFO L175 Difference]: Start difference. First operand has 322 places, 557 transitions, 8572 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:50:29,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 577 transitions, 9800 flow [2024-06-27 23:50:31,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 577 transitions, 9541 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:31,083 INFO L231 Difference]: Finished difference. Result has 325 places, 560 transitions, 8589 flow [2024-06-27 23:50:31,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8313, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8589, PETRI_PLACES=325, PETRI_TRANSITIONS=560} [2024-06-27 23:50:31,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 23:50:31,084 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 560 transitions, 8589 flow [2024-06-27 23:50:31,084 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 23:50:31,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:31,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:31,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:50:31,084 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:31,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1019111008, now seen corresponding path program 3 times [2024-06-27 23:50:31,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:31,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888303833] [2024-06-27 23:50:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:31,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:32,229 INFO 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 23:50:32,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:32,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888303833] [2024-06-27 23:50:32,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888303833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:32,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:32,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:32,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538276955] [2024-06-27 23:50:32,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:32,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:32,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:32,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:32,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 560 transitions, 8589 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 23:50:32,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:32,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:32,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:33,993 INFO L124 PetriNetUnfolderBase]: 4123/6830 cut-off events. [2024-06-27 23:50:33,993 INFO L125 PetriNetUnfolderBase]: For 739635/739638 co-relation queries the response was YES. [2024-06-27 23:50:34,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61301 conditions, 6830 events. 4123/6830 cut-off events. For 739635/739638 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 46158 event pairs, 1140 based on Foata normal form. 6/6826 useless extension candidates. Maximal degree in co-relation 61148. Up to 5924 conditions per place. [2024-06-27 23:50:34,081 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 433 selfloop transitions, 97 changer transitions 0/577 dead transitions. [2024-06-27 23:50:34,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 577 transitions, 9813 flow [2024-06-27 23:50:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:50:34,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:50:34,082 INFO L175 Difference]: Start difference. First operand has 325 places, 560 transitions, 8589 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:50:34,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 577 transitions, 9813 flow [2024-06-27 23:50:36,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 577 transitions, 9563 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:36,038 INFO L231 Difference]: Finished difference. Result has 326 places, 563 transitions, 8670 flow [2024-06-27 23:50:36,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8339, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8670, PETRI_PLACES=326, PETRI_TRANSITIONS=563} [2024-06-27 23:50:36,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 23:50:36,039 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 563 transitions, 8670 flow [2024-06-27 23:50:36,039 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 23:50:36,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:36,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:36,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:50:36,040 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:36,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1305987426, now seen corresponding path program 1 times [2024-06-27 23:50:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:36,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958919594] [2024-06-27 23:50:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:36,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958919594] [2024-06-27 23:50:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958919594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:37,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:50:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972292738] [2024-06-27 23:50:37,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:50:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:50:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:50:37,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:37,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 563 transitions, 8670 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:37,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:37,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:37,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:38,864 INFO L124 PetriNetUnfolderBase]: 4184/6894 cut-off events. [2024-06-27 23:50:38,864 INFO L125 PetriNetUnfolderBase]: For 745765/745768 co-relation queries the response was YES. [2024-06-27 23:50:38,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62034 conditions, 6894 events. 4184/6894 cut-off events. For 745765/745768 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46154 event pairs, 1178 based on Foata normal form. 4/6888 useless extension candidates. Maximal degree in co-relation 61880. Up to 6238 conditions per place. [2024-06-27 23:50:38,951 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 494 selfloop transitions, 85 changer transitions 0/584 dead transitions. [2024-06-27 23:50:38,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 584 transitions, 9998 flow [2024-06-27 23:50:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 23:50:38,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 23:50:38,953 INFO L175 Difference]: Start difference. First operand has 326 places, 563 transitions, 8670 flow. Second operand 9 states and 167 transitions. [2024-06-27 23:50:38,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 584 transitions, 9998 flow [2024-06-27 23:50:40,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 584 transitions, 9691 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 23:50:40,791 INFO L231 Difference]: Finished difference. Result has 329 places, 567 transitions, 8670 flow [2024-06-27 23:50:40,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8363, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8670, PETRI_PLACES=329, PETRI_TRANSITIONS=567} [2024-06-27 23:50:40,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 23:50:40,792 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 567 transitions, 8670 flow [2024-06-27 23:50:40,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:40,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:40,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:40,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:50:40,792 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 23:50:40,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1018754136, now seen corresponding path program 2 times [2024-06-27 23:50:40,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:40,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731068445] [2024-06-27 23:50:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:42,014 INFO 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 23:50:42,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:42,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731068445] [2024-06-27 23:50:42,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731068445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:42,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:42,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:50:42,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467256368] [2024-06-27 23:50:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:42,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:50:42,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:50:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:50:42,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:42,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 567 transitions, 8670 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:42,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:42,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:42,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:43,733 INFO L124 PetriNetUnfolderBase]: 4236/6972 cut-off events. [2024-06-27 23:50:43,733 INFO L125 PetriNetUnfolderBase]: For 784029/784032 co-relation queries the response was YES. [2024-06-27 23:50:43,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63798 conditions, 6972 events. 4236/6972 cut-off events. For 784029/784032 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 46699 event pairs, 1157 based on Foata normal form. 4/6966 useless extension candidates. Maximal degree in co-relation 63643. Up to 6051 conditions per place. [2024-06-27 23:50:43,826 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 447 selfloop transitions, 144 changer transitions 0/596 dead transitions. [2024-06-27 23:50:43,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 596 transitions, 10670 flow [2024-06-27 23:50:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:50:43,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:50:43,827 INFO L175 Difference]: Start difference. First operand has 329 places, 567 transitions, 8670 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:50:43,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 596 transitions, 10670 flow [2024-06-27 23:50:45,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 596 transitions, 10395 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:45,721 INFO L231 Difference]: Finished difference. Result has 333 places, 579 transitions, 9145 flow [2024-06-27 23:50:45,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8395, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9145, PETRI_PLACES=333, PETRI_TRANSITIONS=579} [2024-06-27 23:50:45,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 23:50:45,722 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 579 transitions, 9145 flow [2024-06-27 23:50:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:45,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:45,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:45,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:50:45,723 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:45,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1018742046, now seen corresponding path program 3 times [2024-06-27 23:50:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:45,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829808191] [2024-06-27 23:50:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:45,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829808191] [2024-06-27 23:50:46,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829808191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:46,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:46,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:50:46,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609994126] [2024-06-27 23:50:46,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:46,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:50:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:50:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:50:46,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:46,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 579 transitions, 9145 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:46,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:46,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:46,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:48,695 INFO L124 PetriNetUnfolderBase]: 4232/6967 cut-off events. [2024-06-27 23:50:48,695 INFO L125 PetriNetUnfolderBase]: For 801703/801706 co-relation queries the response was YES. [2024-06-27 23:50:48,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64769 conditions, 6967 events. 4232/6967 cut-off events. For 801703/801706 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46674 event pairs, 1157 based on Foata normal form. 4/6961 useless extension candidates. Maximal degree in co-relation 64611. Up to 6049 conditions per place. [2024-06-27 23:50:48,791 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 445 selfloop transitions, 146 changer transitions 0/596 dead transitions. [2024-06-27 23:50:48,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 596 transitions, 10799 flow [2024-06-27 23:50:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:50:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:50:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 23:50:48,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 23:50:48,792 INFO L175 Difference]: Start difference. First operand has 333 places, 579 transitions, 9145 flow. Second operand 10 states and 178 transitions. [2024-06-27 23:50:48,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 596 transitions, 10799 flow [2024-06-27 23:50:50,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 596 transitions, 10444 flow, removed 128 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:50,590 INFO L231 Difference]: Finished difference. Result has 339 places, 579 transitions, 9091 flow [2024-06-27 23:50:50,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8790, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9091, PETRI_PLACES=339, PETRI_TRANSITIONS=579} [2024-06-27 23:50:50,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 23:50:50,590 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 579 transitions, 9091 flow [2024-06-27 23:50:50,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:50,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:50,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:50,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:50:50,591 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:50,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash -407728262, now seen corresponding path program 1 times [2024-06-27 23:50:50,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:50,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294008026] [2024-06-27 23:50:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:50,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:51,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:51,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294008026] [2024-06-27 23:50:51,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294008026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:51,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:51,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438713258] [2024-06-27 23:50:51,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:51,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:51,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:51,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:51,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:51,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 579 transitions, 9091 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:51,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:51,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:51,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:53,633 INFO L124 PetriNetUnfolderBase]: 4237/6973 cut-off events. [2024-06-27 23:50:53,633 INFO L125 PetriNetUnfolderBase]: For 811738/811740 co-relation queries the response was YES. [2024-06-27 23:50:53,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65169 conditions, 6973 events. 4237/6973 cut-off events. For 811738/811740 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46718 event pairs, 1425 based on Foata normal form. 3/6974 useless extension candidates. Maximal degree in co-relation 65009. Up to 6487 conditions per place. [2024-06-27 23:50:53,734 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 548 selfloop transitions, 45 changer transitions 0/598 dead transitions. [2024-06-27 23:50:53,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 598 transitions, 10445 flow [2024-06-27 23:50:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:50:53,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:50:53,738 INFO L175 Difference]: Start difference. First operand has 339 places, 579 transitions, 9091 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:50:53,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 598 transitions, 10445 flow [2024-06-27 23:50:55,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 598 transitions, 10151 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 23:50:55,628 INFO L231 Difference]: Finished difference. Result has 339 places, 582 transitions, 9021 flow [2024-06-27 23:50:55,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9021, PETRI_PLACES=339, PETRI_TRANSITIONS=582} [2024-06-27 23:50:55,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 23:50:55,628 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 582 transitions, 9021 flow [2024-06-27 23:50:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:55,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:55,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:50:55,629 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:55,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1019100096, now seen corresponding path program 4 times [2024-06-27 23:50:55,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:55,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470920515] [2024-06-27 23:50:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:56,847 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 23:50:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470920515] [2024-06-27 23:50:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470920515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:56,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:56,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:50:56,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875369508] [2024-06-27 23:50:56,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:56,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:50:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:50:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:50:56,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:56,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 582 transitions, 9021 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:56,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:56,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:56,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:58,591 INFO L124 PetriNetUnfolderBase]: 4239/6977 cut-off events. [2024-06-27 23:50:58,592 INFO L125 PetriNetUnfolderBase]: For 815981/815984 co-relation queries the response was YES. [2024-06-27 23:50:58,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65093 conditions, 6977 events. 4239/6977 cut-off events. For 815981/815984 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 46771 event pairs, 1156 based on Foata normal form. 4/6971 useless extension candidates. Maximal degree in co-relation 64933. Up to 6060 conditions per place. [2024-06-27 23:50:58,691 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 447 selfloop transitions, 149 changer transitions 0/601 dead transitions. [2024-06-27 23:50:58,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 601 transitions, 10563 flow [2024-06-27 23:50:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:50:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:50:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:50:58,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:50:58,693 INFO L175 Difference]: Start difference. First operand has 339 places, 582 transitions, 9021 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:50:58,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 601 transitions, 10563 flow [2024-06-27 23:51:00,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 601 transitions, 10365 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 23:51:00,789 INFO L231 Difference]: Finished difference. Result has 342 places, 586 transitions, 9257 flow [2024-06-27 23:51:00,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8823, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9257, PETRI_PLACES=342, PETRI_TRANSITIONS=586} [2024-06-27 23:51:00,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-27 23:51:00,790 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 586 transitions, 9257 flow [2024-06-27 23:51:00,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:00,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:00,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:00,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:51:00,790 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:00,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:00,790 INFO L85 PathProgramCache]: Analyzing trace with hash 896900780, now seen corresponding path program 4 times [2024-06-27 23:51:00,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:00,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990087409] [2024-06-27 23:51:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:00,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:01,995 INFO 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 23:51:01,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:01,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990087409] [2024-06-27 23:51:01,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990087409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:01,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:01,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:01,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028415317] [2024-06-27 23:51:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:01,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:01,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:02,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:51:02,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 586 transitions, 9257 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 23:51:02,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:02,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:51:02,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:03,812 INFO L124 PetriNetUnfolderBase]: 4186/6928 cut-off events. [2024-06-27 23:51:03,813 INFO L125 PetriNetUnfolderBase]: For 834111/834111 co-relation queries the response was YES. [2024-06-27 23:51:03,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65415 conditions, 6928 events. 4186/6928 cut-off events. For 834111/834111 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 46737 event pairs, 1084 based on Foata normal form. 1/6907 useless extension candidates. Maximal degree in co-relation 65253. Up to 5935 conditions per place. [2024-06-27 23:51:03,921 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 122 changer transitions 0/608 dead transitions. [2024-06-27 23:51:03,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 608 transitions, 10544 flow [2024-06-27 23:51:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:51:03,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:51:03,922 INFO L175 Difference]: Start difference. First operand has 342 places, 586 transitions, 9257 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:51:03,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 608 transitions, 10544 flow [2024-06-27 23:51:06,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 608 transitions, 10233 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 23:51:06,417 INFO L231 Difference]: Finished difference. Result has 344 places, 589 transitions, 9295 flow [2024-06-27 23:51:06,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8946, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9295, PETRI_PLACES=344, PETRI_TRANSITIONS=589} [2024-06-27 23:51:06,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 23:51:06,418 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 589 transitions, 9295 flow [2024-06-27 23:51:06,418 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 23:51:06,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:06,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:06,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:51:06,419 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:06,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1350252826, now seen corresponding path program 5 times [2024-06-27 23:51:06,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:06,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346627125] [2024-06-27 23:51:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:06,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:07,837 INFO 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 23:51:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346627125] [2024-06-27 23:51:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346627125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:07,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977827549] [2024-06-27 23:51:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:07,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:51:07,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 589 transitions, 9295 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 23:51:07,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:07,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:51:07,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:09,611 INFO L124 PetriNetUnfolderBase]: 4215/6966 cut-off events. [2024-06-27 23:51:09,611 INFO L125 PetriNetUnfolderBase]: For 865991/865991 co-relation queries the response was YES. [2024-06-27 23:51:09,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66472 conditions, 6966 events. 4215/6966 cut-off events. For 865991/865991 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 46960 event pairs, 1074 based on Foata normal form. 1/6943 useless extension candidates. Maximal degree in co-relation 66309. Up to 5935 conditions per place. [2024-06-27 23:51:09,724 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 431 selfloop transitions, 137 changer transitions 0/615 dead transitions. [2024-06-27 23:51:09,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 615 transitions, 10953 flow [2024-06-27 23:51:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:51:09,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:51:09,726 INFO L175 Difference]: Start difference. First operand has 344 places, 589 transitions, 9295 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:51:09,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 615 transitions, 10953 flow [2024-06-27 23:51:12,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 615 transitions, 10665 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:12,329 INFO L231 Difference]: Finished difference. Result has 349 places, 598 transitions, 9608 flow [2024-06-27 23:51:12,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9007, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9608, PETRI_PLACES=349, PETRI_TRANSITIONS=598} [2024-06-27 23:51:12,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 23:51:12,339 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 598 transitions, 9608 flow [2024-06-27 23:51:12,339 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 23:51:12,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:12,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:12,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:51:12,339 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:12,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1523426810, now seen corresponding path program 6 times [2024-06-27 23:51:12,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:12,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148288451] [2024-06-27 23:51:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:13,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:13,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148288451] [2024-06-27 23:51:13,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148288451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:13,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:13,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942130922] [2024-06-27 23:51:13,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:13,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:13,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:13,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:51:13,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 598 transitions, 9608 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 23:51:13,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:13,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:51:13,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:15,301 INFO L124 PetriNetUnfolderBase]: 4212/6967 cut-off events. [2024-06-27 23:51:15,301 INFO L125 PetriNetUnfolderBase]: For 885437/885437 co-relation queries the response was YES. [2024-06-27 23:51:15,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67313 conditions, 6967 events. 4212/6967 cut-off events. For 885437/885437 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47038 event pairs, 1070 based on Foata normal form. 1/6945 useless extension candidates. Maximal degree in co-relation 67148. Up to 5969 conditions per place. [2024-06-27 23:51:15,406 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 454 selfloop transitions, 118 changer transitions 0/619 dead transitions. [2024-06-27 23:51:15,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 619 transitions, 10902 flow [2024-06-27 23:51:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:51:15,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:51:15,407 INFO L175 Difference]: Start difference. First operand has 349 places, 598 transitions, 9608 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:51:15,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 619 transitions, 10902 flow [2024-06-27 23:51:17,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 619 transitions, 10598 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:17,763 INFO L231 Difference]: Finished difference. Result has 352 places, 599 transitions, 9597 flow [2024-06-27 23:51:17,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9324, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9597, PETRI_PLACES=352, PETRI_TRANSITIONS=599} [2024-06-27 23:51:17,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 23:51:17,764 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 599 transitions, 9597 flow [2024-06-27 23:51:17,764 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 23:51:17,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:17,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:17,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:51:17,765 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:17,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1523546780, now seen corresponding path program 7 times [2024-06-27 23:51:17,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546641090] [2024-06-27 23:51:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546641090] [2024-06-27 23:51:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546641090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:19,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:19,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664849211] [2024-06-27 23:51:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:19,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:51:19,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 599 transitions, 9597 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 23:51:19,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:19,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:51:19,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:20,888 INFO L124 PetriNetUnfolderBase]: 4208/6960 cut-off events. [2024-06-27 23:51:20,888 INFO L125 PetriNetUnfolderBase]: For 896508/896508 co-relation queries the response was YES. [2024-06-27 23:51:20,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67446 conditions, 6960 events. 4208/6960 cut-off events. For 896508/896508 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 46889 event pairs, 1070 based on Foata normal form. 1/6939 useless extension candidates. Maximal degree in co-relation 67279. Up to 5949 conditions per place. [2024-06-27 23:51:20,999 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 444 selfloop transitions, 128 changer transitions 0/619 dead transitions. [2024-06-27 23:51:20,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 619 transitions, 10927 flow [2024-06-27 23:51:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:51:21,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:51:21,001 INFO L175 Difference]: Start difference. First operand has 352 places, 599 transitions, 9597 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:51:21,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 619 transitions, 10927 flow [2024-06-27 23:51:23,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 619 transitions, 10648 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:23,463 INFO L231 Difference]: Finished difference. Result has 355 places, 602 transitions, 9691 flow [2024-06-27 23:51:23,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9318, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9691, PETRI_PLACES=355, PETRI_TRANSITIONS=602} [2024-06-27 23:51:23,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 23:51:23,464 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 602 transitions, 9691 flow [2024-06-27 23:51:23,464 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 23:51:23,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:23,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:23,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:51:23,465 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:23,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1593957204, now seen corresponding path program 4 times [2024-06-27 23:51:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:23,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465057507] [2024-06-27 23:51:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:23,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:24,557 INFO 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 23:51:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465057507] [2024-06-27 23:51:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465057507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:24,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204207794] [2024-06-27 23:51:24,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:24,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:24,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:24,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:24,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:24,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 602 transitions, 9691 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:24,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:24,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:24,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:26,255 INFO L124 PetriNetUnfolderBase]: 4255/6996 cut-off events. [2024-06-27 23:51:26,256 INFO L125 PetriNetUnfolderBase]: For 905180/905180 co-relation queries the response was YES. [2024-06-27 23:51:26,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67663 conditions, 6996 events. 4255/6996 cut-off events. For 905180/905180 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 46778 event pairs, 1154 based on Foata normal form. 2/6983 useless extension candidates. Maximal degree in co-relation 67495. Up to 6375 conditions per place. [2024-06-27 23:51:26,370 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 539 selfloop transitions, 74 changer transitions 0/618 dead transitions. [2024-06-27 23:51:26,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 618 transitions, 10984 flow [2024-06-27 23:51:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 23:51:26,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:51:26,372 INFO L175 Difference]: Start difference. First operand has 355 places, 602 transitions, 9691 flow. Second operand 8 states and 147 transitions. [2024-06-27 23:51:26,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 618 transitions, 10984 flow [2024-06-27 23:51:28,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 618 transitions, 10601 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 23:51:28,884 INFO L231 Difference]: Finished difference. Result has 357 places, 602 transitions, 9466 flow [2024-06-27 23:51:28,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9308, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9466, PETRI_PLACES=357, PETRI_TRANSITIONS=602} [2024-06-27 23:51:28,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-27 23:51:28,885 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 602 transitions, 9466 flow [2024-06-27 23:51:28,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:28,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:28,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:28,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:51:28,885 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:28,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1877809820, now seen corresponding path program 8 times [2024-06-27 23:51:28,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:28,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882944172] [2024-06-27 23:51:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:28,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:30,152 INFO 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 23:51:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882944172] [2024-06-27 23:51:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882944172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:30,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:30,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224999870] [2024-06-27 23:51:30,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:30,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:51:30,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 602 transitions, 9466 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 23:51:30,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:30,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:51:30,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:32,036 INFO L124 PetriNetUnfolderBase]: 4226/6989 cut-off events. [2024-06-27 23:51:32,036 INFO L125 PetriNetUnfolderBase]: For 933841/933841 co-relation queries the response was YES. [2024-06-27 23:51:32,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68138 conditions, 6989 events. 4226/6989 cut-off events. For 933841/933841 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 47185 event pairs, 1061 based on Foata normal form. 1/6968 useless extension candidates. Maximal degree in co-relation 67969. Up to 5882 conditions per place. [2024-06-27 23:51:32,152 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 408 selfloop transitions, 172 changer transitions 0/627 dead transitions. [2024-06-27 23:51:32,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 627 transitions, 11414 flow [2024-06-27 23:51:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:51:32,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 23:51:32,153 INFO L175 Difference]: Start difference. First operand has 357 places, 602 transitions, 9466 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:51:32,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 627 transitions, 11414 flow [2024-06-27 23:51:34,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 627 transitions, 10945 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:34,517 INFO L231 Difference]: Finished difference. Result has 357 places, 612 transitions, 9778 flow [2024-06-27 23:51:34,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8997, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9778, PETRI_PLACES=357, PETRI_TRANSITIONS=612} [2024-06-27 23:51:34,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-27 23:51:34,518 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 612 transitions, 9778 flow [2024-06-27 23:51:34,518 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 23:51:34,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:34,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:34,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:51:34,519 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:34,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:34,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1877810006, now seen corresponding path program 5 times [2024-06-27 23:51:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:34,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851945258] [2024-06-27 23:51:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:34,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:35,573 INFO 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 23:51:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851945258] [2024-06-27 23:51:35,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851945258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:35,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:35,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:35,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559751246] [2024-06-27 23:51:35,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:35,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:35,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:35,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:35,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:35,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 612 transitions, 9778 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:35,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:35,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:35,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:37,554 INFO L124 PetriNetUnfolderBase]: 4313/7082 cut-off events. [2024-06-27 23:51:37,554 INFO L125 PetriNetUnfolderBase]: For 971907/971907 co-relation queries the response was YES. [2024-06-27 23:51:37,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70233 conditions, 7082 events. 4313/7082 cut-off events. For 971907/971907 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 47350 event pairs, 1149 based on Foata normal form. 1/7068 useless extension candidates. Maximal degree in co-relation 70061. Up to 6391 conditions per place. [2024-06-27 23:51:37,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 523 selfloop transitions, 109 changer transitions 0/637 dead transitions. [2024-06-27 23:51:37,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 637 transitions, 11667 flow [2024-06-27 23:51:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:51:37,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:51:37,659 INFO L175 Difference]: Start difference. First operand has 357 places, 612 transitions, 9778 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:51:37,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 637 transitions, 11667 flow [2024-06-27 23:51:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 637 transitions, 11371 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-27 23:51:40,158 INFO L231 Difference]: Finished difference. Result has 364 places, 622 transitions, 9969 flow [2024-06-27 23:51:40,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9482, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9969, PETRI_PLACES=364, PETRI_TRANSITIONS=622} [2024-06-27 23:51:40,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 23:51:40,159 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 622 transitions, 9969 flow [2024-06-27 23:51:40,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:40,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:40,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:40,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:51:40,160 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:40,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1878046970, now seen corresponding path program 9 times [2024-06-27 23:51:40,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:40,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074244052] [2024-06-27 23:51:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:41,648 INFO 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 23:51:41,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:41,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074244052] [2024-06-27 23:51:41,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074244052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:41,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:41,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:41,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498557713] [2024-06-27 23:51:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:41,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:41,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:41,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:51:41,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 622 transitions, 9969 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 23:51:41,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:41,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:51:41,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:43,487 INFO L124 PetriNetUnfolderBase]: 4252/7021 cut-off events. [2024-06-27 23:51:43,488 INFO L125 PetriNetUnfolderBase]: For 978487/978487 co-relation queries the response was YES. [2024-06-27 23:51:43,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69734 conditions, 7021 events. 4252/7021 cut-off events. For 978487/978487 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 47352 event pairs, 1058 based on Foata normal form. 1/6998 useless extension candidates. Maximal degree in co-relation 69558. Up to 5908 conditions per place. [2024-06-27 23:51:43,600 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 410 selfloop transitions, 177 changer transitions 0/637 dead transitions. [2024-06-27 23:51:43,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 637 transitions, 11583 flow [2024-06-27 23:51:43,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:51:43,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:51:43,602 INFO L175 Difference]: Start difference. First operand has 364 places, 622 transitions, 9969 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:51:43,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 637 transitions, 11583 flow [2024-06-27 23:51:46,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 637 transitions, 11315 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 23:51:46,453 INFO L231 Difference]: Finished difference. Result has 369 places, 622 transitions, 10061 flow [2024-06-27 23:51:46,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9701, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10061, PETRI_PLACES=369, PETRI_TRANSITIONS=622} [2024-06-27 23:51:46,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 23:51:46,456 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 622 transitions, 10061 flow [2024-06-27 23:51:46,456 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 23:51:46,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:46,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:46,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:51:46,456 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:46,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1580463598, now seen corresponding path program 6 times [2024-06-27 23:51:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:46,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702915281] [2024-06-27 23:51:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:47,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:47,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702915281] [2024-06-27 23:51:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702915281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:47,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:47,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:47,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094375242] [2024-06-27 23:51:47,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:47,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:47,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:47,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 622 transitions, 10061 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:47,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:47,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:47,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:49,391 INFO L124 PetriNetUnfolderBase]: 4307/7074 cut-off events. [2024-06-27 23:51:49,391 INFO L125 PetriNetUnfolderBase]: For 988394/988394 co-relation queries the response was YES. [2024-06-27 23:51:49,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70240 conditions, 7074 events. 4307/7074 cut-off events. For 988394/988394 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 47300 event pairs, 1149 based on Foata normal form. 1/7060 useless extension candidates. Maximal degree in co-relation 70063. Up to 6384 conditions per place. [2024-06-27 23:51:49,510 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 516 selfloop transitions, 115 changer transitions 0/636 dead transitions. [2024-06-27 23:51:49,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 636 transitions, 11565 flow [2024-06-27 23:51:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:51:49,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:51:49,512 INFO L175 Difference]: Start difference. First operand has 369 places, 622 transitions, 10061 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:51:49,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 636 transitions, 11565 flow [2024-06-27 23:51:52,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 636 transitions, 11076 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 23:51:52,983 INFO L231 Difference]: Finished difference. Result has 370 places, 622 transitions, 9808 flow [2024-06-27 23:51:52,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9808, PETRI_PLACES=370, PETRI_TRANSITIONS=622} [2024-06-27 23:51:52,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 23:51:52,984 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 622 transitions, 9808 flow [2024-06-27 23:51:52,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:52,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:52,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:51:52,985 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:52,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2050120960, now seen corresponding path program 7 times [2024-06-27 23:51:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699789188] [2024-06-27 23:51:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:52,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:54,118 INFO 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 23:51:54,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699789188] [2024-06-27 23:51:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699789188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:54,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:54,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:54,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028351576] [2024-06-27 23:51:54,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:54,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:54,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:54,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:54,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 622 transitions, 9808 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:54,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:54,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:55,861 INFO L124 PetriNetUnfolderBase]: 4352/7147 cut-off events. [2024-06-27 23:51:55,861 INFO L125 PetriNetUnfolderBase]: For 1029414/1029417 co-relation queries the response was YES. [2024-06-27 23:51:55,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70894 conditions, 7147 events. 4352/7147 cut-off events. For 1029414/1029417 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 47859 event pairs, 1177 based on Foata normal form. 3/7130 useless extension candidates. Maximal degree in co-relation 70717. Up to 6079 conditions per place. [2024-06-27 23:51:55,987 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 396 selfloop transitions, 247 changer transitions 0/648 dead transitions. [2024-06-27 23:51:55,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 648 transitions, 11809 flow [2024-06-27 23:51:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:51:55,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:51:55,988 INFO L175 Difference]: Start difference. First operand has 370 places, 622 transitions, 9808 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:51:55,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 648 transitions, 11809 flow [2024-06-27 23:51:59,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 648 transitions, 11607 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:59,179 INFO L231 Difference]: Finished difference. Result has 372 places, 636 transitions, 10435 flow [2024-06-27 23:51:59,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9606, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10435, PETRI_PLACES=372, PETRI_TRANSITIONS=636} [2024-06-27 23:51:59,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 23:51:59,180 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 636 transitions, 10435 flow [2024-06-27 23:51:59,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:51:59,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:59,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:59,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:51:59,180 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:59,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash 183020748, now seen corresponding path program 8 times [2024-06-27 23:51:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:59,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541568731] [2024-06-27 23:51:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:00,294 INFO 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 23:52:00,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:00,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541568731] [2024-06-27 23:52:00,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541568731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:00,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:00,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:00,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953026656] [2024-06-27 23:52:00,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:00,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:00,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:00,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:00,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 636 transitions, 10435 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:00,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:00,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:00,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:02,138 INFO L124 PetriNetUnfolderBase]: 4346/7135 cut-off events. [2024-06-27 23:52:02,139 INFO L125 PetriNetUnfolderBase]: For 1043095/1043098 co-relation queries the response was YES. [2024-06-27 23:52:02,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71323 conditions, 7135 events. 4346/7135 cut-off events. For 1043095/1043098 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 47730 event pairs, 1176 based on Foata normal form. 4/7119 useless extension candidates. Maximal degree in co-relation 71144. Up to 6074 conditions per place. [2024-06-27 23:52:02,252 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 226 changer transitions 0/648 dead transitions. [2024-06-27 23:52:02,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 648 transitions, 12161 flow [2024-06-27 23:52:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 23:52:02,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 23:52:02,255 INFO L175 Difference]: Start difference. First operand has 372 places, 636 transitions, 10435 flow. Second operand 9 states and 160 transitions. [2024-06-27 23:52:02,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 648 transitions, 12161 flow [2024-06-27 23:52:05,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 648 transitions, 11790 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 23:52:05,513 INFO L231 Difference]: Finished difference. Result has 377 places, 636 transitions, 10524 flow [2024-06-27 23:52:05,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10524, PETRI_PLACES=377, PETRI_TRANSITIONS=636} [2024-06-27 23:52:05,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 23:52:05,528 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 636 transitions, 10524 flow [2024-06-27 23:52:05,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:05,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:05,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:05,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:52:05,529 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:05,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash 171402258, now seen corresponding path program 9 times [2024-06-27 23:52:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:05,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490485797] [2024-06-27 23:52:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:05,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:06,657 INFO 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 23:52:06,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:06,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490485797] [2024-06-27 23:52:06,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490485797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:06,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:06,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:06,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986273843] [2024-06-27 23:52:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:06,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:06,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:06,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:06,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:06,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:06,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 636 transitions, 10524 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:06,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:06,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:08,466 INFO L124 PetriNetUnfolderBase]: 4340/7132 cut-off events. [2024-06-27 23:52:08,466 INFO L125 PetriNetUnfolderBase]: For 1049077/1049080 co-relation queries the response was YES. [2024-06-27 23:52:08,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71251 conditions, 7132 events. 4340/7132 cut-off events. For 1049077/1049080 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 47861 event pairs, 1177 based on Foata normal form. 4/7116 useless extension candidates. Maximal degree in co-relation 71071. Up to 6069 conditions per place. [2024-06-27 23:52:08,585 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 206 changer transitions 0/649 dead transitions. [2024-06-27 23:52:08,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 649 transitions, 12464 flow [2024-06-27 23:52:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:52:08,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:52:08,586 INFO L175 Difference]: Start difference. First operand has 377 places, 636 transitions, 10524 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:52:08,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 649 transitions, 12464 flow [2024-06-27 23:52:12,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 649 transitions, 12001 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:12,021 INFO L231 Difference]: Finished difference. Result has 379 places, 636 transitions, 10482 flow [2024-06-27 23:52:12,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10061, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10482, PETRI_PLACES=379, PETRI_TRANSITIONS=636} [2024-06-27 23:52:12,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 23:52:12,022 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 636 transitions, 10482 flow [2024-06-27 23:52:12,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:12,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:52:12,023 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:12,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash -760891660, now seen corresponding path program 10 times [2024-06-27 23:52:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:12,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275828324] [2024-06-27 23:52:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:13,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:13,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275828324] [2024-06-27 23:52:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275828324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:13,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:13,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:13,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486874353] [2024-06-27 23:52:13,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:13,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:13,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:13,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:13,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:13,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:13,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 636 transitions, 10482 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:13,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:13,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:13,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:14,998 INFO L124 PetriNetUnfolderBase]: 4342/7134 cut-off events. [2024-06-27 23:52:14,998 INFO L125 PetriNetUnfolderBase]: For 1061819/1061822 co-relation queries the response was YES. [2024-06-27 23:52:15,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71263 conditions, 7134 events. 4342/7134 cut-off events. For 1061819/1061822 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 47844 event pairs, 1177 based on Foata normal form. 4/7118 useless extension candidates. Maximal degree in co-relation 71082. Up to 6070 conditions per place. [2024-06-27 23:52:15,118 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 211 changer transitions 0/651 dead transitions. [2024-06-27 23:52:15,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 651 transitions, 12288 flow [2024-06-27 23:52:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 23:52:15,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 23:52:15,120 INFO L175 Difference]: Start difference. First operand has 379 places, 636 transitions, 10482 flow. Second operand 9 states and 161 transitions. [2024-06-27 23:52:15,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 651 transitions, 12288 flow [2024-06-27 23:52:19,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 651 transitions, 11862 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 23:52:19,047 INFO L231 Difference]: Finished difference. Result has 383 places, 639 transitions, 10553 flow [2024-06-27 23:52:19,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10058, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10553, PETRI_PLACES=383, PETRI_TRANSITIONS=639} [2024-06-27 23:52:19,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 23:52:19,048 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 639 transitions, 10553 flow [2024-06-27 23:52:19,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:19,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:19,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:19,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:52:19,048 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:19,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash -760891846, now seen corresponding path program 10 times [2024-06-27 23:52:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:19,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279979712] [2024-06-27 23:52:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:19,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:20,382 INFO 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 23:52:20,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:20,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279979712] [2024-06-27 23:52:20,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279979712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:20,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:20,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:20,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493532761] [2024-06-27 23:52:20,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:20,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:20,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:20,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:20,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:20,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:52:20,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 639 transitions, 10553 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 23:52:20,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:20,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:52:20,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:22,484 INFO L124 PetriNetUnfolderBase]: 4309/7122 cut-off events. [2024-06-27 23:52:22,485 INFO L125 PetriNetUnfolderBase]: For 1097975/1097975 co-relation queries the response was YES. [2024-06-27 23:52:22,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71845 conditions, 7122 events. 4309/7122 cut-off events. For 1097975/1097975 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 48153 event pairs, 1121 based on Foata normal form. 2/7096 useless extension candidates. Maximal degree in co-relation 71663. Up to 5736 conditions per place. [2024-06-27 23:52:22,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 409 selfloop transitions, 199 changer transitions 0/663 dead transitions. [2024-06-27 23:52:22,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 663 transitions, 12635 flow [2024-06-27 23:52:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:52:22,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:52:22,593 INFO L175 Difference]: Start difference. First operand has 383 places, 639 transitions, 10553 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:52:22,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 663 transitions, 12635 flow [2024-06-27 23:52:26,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 663 transitions, 12215 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:26,325 INFO L231 Difference]: Finished difference. Result has 385 places, 649 transitions, 10864 flow [2024-06-27 23:52:26,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10133, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10864, PETRI_PLACES=385, PETRI_TRANSITIONS=649} [2024-06-27 23:52:26,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 23:52:26,326 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 649 transitions, 10864 flow [2024-06-27 23:52:26,326 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 23:52:26,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:26,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:26,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:52:26,327 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:26,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -836399186, now seen corresponding path program 11 times [2024-06-27 23:52:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782533682] [2024-06-27 23:52:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:27,434 INFO 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 23:52:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782533682] [2024-06-27 23:52:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782533682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:27,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:27,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090341219] [2024-06-27 23:52:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:27,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:27,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:27,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 649 transitions, 10864 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:27,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:27,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:27,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:29,370 INFO L124 PetriNetUnfolderBase]: 4363/7165 cut-off events. [2024-06-27 23:52:29,371 INFO L125 PetriNetUnfolderBase]: For 1110323/1110326 co-relation queries the response was YES. [2024-06-27 23:52:29,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72851 conditions, 7165 events. 4363/7165 cut-off events. For 1110323/1110326 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 48027 event pairs, 1176 based on Foata normal form. 3/7148 useless extension candidates. Maximal degree in co-relation 72668. Up to 6101 conditions per place. [2024-06-27 23:52:29,493 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 405 selfloop transitions, 252 changer transitions 0/662 dead transitions. [2024-06-27 23:52:29,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 662 transitions, 12848 flow [2024-06-27 23:52:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:52:29,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 23:52:29,495 INFO L175 Difference]: Start difference. First operand has 385 places, 649 transitions, 10864 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:52:29,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 662 transitions, 12848 flow [2024-06-27 23:52:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 662 transitions, 12558 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-27 23:52:33,378 INFO L231 Difference]: Finished difference. Result has 390 places, 649 transitions, 11084 flow [2024-06-27 23:52:33,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11084, PETRI_PLACES=390, PETRI_TRANSITIONS=649} [2024-06-27 23:52:33,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-27 23:52:33,379 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 649 transitions, 11084 flow [2024-06-27 23:52:33,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:33,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:33,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:33,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:52:33,380 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:33,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash 302508700, now seen corresponding path program 11 times [2024-06-27 23:52:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:33,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280756738] [2024-06-27 23:52:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:34,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:34,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280756738] [2024-06-27 23:52:34,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280756738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:34,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:34,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:34,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723837324] [2024-06-27 23:52:34,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:34,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:34,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:52:34,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 649 transitions, 11084 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 23:52:34,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:34,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:52:34,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:36,769 INFO L124 PetriNetUnfolderBase]: 4317/7132 cut-off events. [2024-06-27 23:52:36,769 INFO L125 PetriNetUnfolderBase]: For 1123508/1123508 co-relation queries the response was YES. [2024-06-27 23:52:36,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72406 conditions, 7132 events. 4317/7132 cut-off events. For 1123508/1123508 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 48268 event pairs, 1119 based on Foata normal form. 1/7104 useless extension candidates. Maximal degree in co-relation 72221. Up to 5744 conditions per place. [2024-06-27 23:52:36,892 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 394 selfloop transitions, 223 changer transitions 0/672 dead transitions. [2024-06-27 23:52:36,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 672 transitions, 13352 flow [2024-06-27 23:52:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:52:36,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:52:36,894 INFO L175 Difference]: Start difference. First operand has 390 places, 649 transitions, 11084 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:52:36,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 672 transitions, 13352 flow [2024-06-27 23:52:40,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 672 transitions, 12568 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-27 23:52:40,352 INFO L231 Difference]: Finished difference. Result has 388 places, 659 transitions, 11112 flow [2024-06-27 23:52:40,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10300, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11112, PETRI_PLACES=388, PETRI_TRANSITIONS=659} [2024-06-27 23:52:40,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 23:52:40,353 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 659 transitions, 11112 flow [2024-06-27 23:52:40,353 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 23:52:40,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:40,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:52:40,353 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:40,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash 597292540, now seen corresponding path program 12 times [2024-06-27 23:52:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:40,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476457906] [2024-06-27 23:52:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:41,623 INFO 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 23:52:41,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476457906] [2024-06-27 23:52:41,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476457906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:41,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:41,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:41,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387365284] [2024-06-27 23:52:41,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:41,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:41,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:41,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:41,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:41,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 659 transitions, 11112 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:41,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:41,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:41,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:43,517 INFO L124 PetriNetUnfolderBase]: 4371/7177 cut-off events. [2024-06-27 23:52:43,517 INFO L125 PetriNetUnfolderBase]: For 1133346/1133349 co-relation queries the response was YES. [2024-06-27 23:52:43,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72422 conditions, 7177 events. 4371/7177 cut-off events. For 1133346/1133349 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 48129 event pairs, 1177 based on Foata normal form. 3/7160 useless extension candidates. Maximal degree in co-relation 72239. Up to 6114 conditions per place. [2024-06-27 23:52:43,646 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 249 changer transitions 0/671 dead transitions. [2024-06-27 23:52:43,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 671 transitions, 12908 flow [2024-06-27 23:52:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:52:43,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:52:43,648 INFO L175 Difference]: Start difference. First operand has 388 places, 659 transitions, 11112 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:52:43,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 671 transitions, 12908 flow [2024-06-27 23:52:47,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 671 transitions, 12632 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-27 23:52:47,261 INFO L231 Difference]: Finished difference. Result has 393 places, 659 transitions, 11340 flow [2024-06-27 23:52:47,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10836, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11340, PETRI_PLACES=393, PETRI_TRANSITIONS=659} [2024-06-27 23:52:47,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 23:52:47,262 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 659 transitions, 11340 flow [2024-06-27 23:52:47,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:52:47,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:47,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:47,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:52:47,263 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:47,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash 302745850, now seen corresponding path program 12 times [2024-06-27 23:52:47,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:47,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764585115] [2024-06-27 23:52:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:48,892 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 23:52:48,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:48,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764585115] [2024-06-27 23:52:48,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764585115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:48,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:48,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:48,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409686931] [2024-06-27 23:52:48,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:48,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:48,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:48,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:49,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:52:49,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 659 transitions, 11340 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 23:52:49,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:49,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:52:49,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:51,282 INFO L124 PetriNetUnfolderBase]: 4309/7120 cut-off events. [2024-06-27 23:52:51,282 INFO L125 PetriNetUnfolderBase]: For 1144219/1144219 co-relation queries the response was YES. [2024-06-27 23:52:51,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72479 conditions, 7120 events. 4309/7120 cut-off events. For 1144219/1144219 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 48185 event pairs, 1119 based on Foata normal form. 1/7092 useless extension candidates. Maximal degree in co-relation 72294. Up to 5737 conditions per place. [2024-06-27 23:52:51,387 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 389 selfloop transitions, 227 changer transitions 0/671 dead transitions. [2024-06-27 23:52:51,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 671 transitions, 13040 flow [2024-06-27 23:52:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:52:51,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:52:51,389 INFO L175 Difference]: Start difference. First operand has 393 places, 659 transitions, 11340 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:52:51,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 671 transitions, 13040 flow [2024-06-27 23:52:54,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 671 transitions, 12421 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 23:52:54,985 INFO L231 Difference]: Finished difference. Result has 393 places, 659 transitions, 11181 flow [2024-06-27 23:52:54,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10721, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11181, PETRI_PLACES=393, PETRI_TRANSITIONS=659} [2024-06-27 23:52:54,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 23:52:54,986 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 659 transitions, 11181 flow [2024-06-27 23:52:54,986 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 23:52:54,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:54,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:54,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:52:54,986 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:54,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash 125254048, now seen corresponding path program 4 times [2024-06-27 23:52:54,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:54,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406058378] [2024-06-27 23:52:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:54,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:56,182 INFO 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 23:52:56,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406058378] [2024-06-27 23:52:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406058378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:56,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652929728] [2024-06-27 23:52:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:56,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:56,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:52:56,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 659 transitions, 11181 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 23:52:56,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:56,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:52:56,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:58,194 INFO L124 PetriNetUnfolderBase]: 4327/7140 cut-off events. [2024-06-27 23:52:58,194 INFO L125 PetriNetUnfolderBase]: For 1184676/1184679 co-relation queries the response was YES. [2024-06-27 23:52:58,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72938 conditions, 7140 events. 4327/7140 cut-off events. For 1184676/1184679 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 48205 event pairs, 1159 based on Foata normal form. 6/7126 useless extension candidates. Maximal degree in co-relation 72752. Up to 6122 conditions per place. [2024-06-27 23:52:58,313 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 126 changer transitions 0/673 dead transitions. [2024-06-27 23:52:58,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 673 transitions, 12593 flow [2024-06-27 23:52:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:52:58,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:52:58,314 INFO L175 Difference]: Start difference. First operand has 393 places, 659 transitions, 11181 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:52:58,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 673 transitions, 12593 flow [2024-06-27 23:53:02,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 673 transitions, 12141 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 23:53:02,469 INFO L231 Difference]: Finished difference. Result has 394 places, 662 transitions, 11139 flow [2024-06-27 23:53:02,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10729, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11139, PETRI_PLACES=394, PETRI_TRANSITIONS=662} [2024-06-27 23:53:02,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-27 23:53:02,470 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 662 transitions, 11139 flow [2024-06-27 23:53:02,470 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 23:53:02,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:02,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:53:02,470 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 125264960, now seen corresponding path program 5 times [2024-06-27 23:53:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:02,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298631495] [2024-06-27 23:53:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:03,856 INFO 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 23:53:03,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298631495] [2024-06-27 23:53:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298631495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:03,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:03,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:03,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078558033] [2024-06-27 23:53:03,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:03,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:03,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:03,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:53:03,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 662 transitions, 11139 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:03,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:03,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:53:03,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:05,820 INFO L124 PetriNetUnfolderBase]: 4426/7259 cut-off events. [2024-06-27 23:53:05,820 INFO L125 PetriNetUnfolderBase]: For 1213291/1213294 co-relation queries the response was YES. [2024-06-27 23:53:05,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74658 conditions, 7259 events. 4426/7259 cut-off events. For 1213291/1213294 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 48698 event pairs, 1178 based on Foata normal form. 4/7243 useless extension candidates. Maximal degree in co-relation 74471. Up to 5947 conditions per place. [2024-06-27 23:53:05,950 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 471 selfloop transitions, 225 changer transitions 0/701 dead transitions. [2024-06-27 23:53:05,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 701 transitions, 13875 flow [2024-06-27 23:53:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:53:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:53:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:53:05,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 23:53:05,952 INFO L175 Difference]: Start difference. First operand has 394 places, 662 transitions, 11139 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:53:05,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 701 transitions, 13875 flow [2024-06-27 23:53:10,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 701 transitions, 13487 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 23:53:10,536 INFO L231 Difference]: Finished difference. Result has 400 places, 685 transitions, 11977 flow [2024-06-27 23:53:10,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11977, PETRI_PLACES=400, PETRI_TRANSITIONS=685} [2024-06-27 23:53:10,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 23:53:10,537 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 685 transitions, 11977 flow [2024-06-27 23:53:10,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:10,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:10,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:10,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:53:10,537 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:10,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash 538930324, now seen corresponding path program 2 times [2024-06-27 23:53:10,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420737156] [2024-06-27 23:53:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:11,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:11,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420737156] [2024-06-27 23:53:11,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420737156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:11,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:11,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:53:11,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719730368] [2024-06-27 23:53:11,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:11,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:53:11,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:53:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:53:11,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:53:11,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 685 transitions, 11977 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:11,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:11,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:53:11,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:13,816 INFO L124 PetriNetUnfolderBase]: 4439/7269 cut-off events. [2024-06-27 23:53:13,816 INFO L125 PetriNetUnfolderBase]: For 1244584/1244590 co-relation queries the response was YES. [2024-06-27 23:53:13,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76533 conditions, 7269 events. 4439/7269 cut-off events. For 1244584/1244590 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 48607 event pairs, 1317 based on Foata normal form. 5/7269 useless extension candidates. Maximal degree in co-relation 76342. Up to 6726 conditions per place. [2024-06-27 23:53:13,955 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 628 selfloop transitions, 74 changer transitions 0/707 dead transitions. [2024-06-27 23:53:13,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 707 transitions, 14289 flow [2024-06-27 23:53:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:53:13,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:53:13,957 INFO L175 Difference]: Start difference. First operand has 400 places, 685 transitions, 11977 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:53:13,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 707 transitions, 14289 flow [2024-06-27 23:53:18,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 707 transitions, 14033 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-06-27 23:53:18,869 INFO L231 Difference]: Finished difference. Result has 405 places, 694 transitions, 12307 flow [2024-06-27 23:53:18,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11727, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12307, PETRI_PLACES=405, PETRI_TRANSITIONS=694} [2024-06-27 23:53:18,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 23:53:18,870 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 694 transitions, 12307 flow [2024-06-27 23:53:18,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:18,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:18,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:53:18,870 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:18,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash 538929890, now seen corresponding path program 6 times [2024-06-27 23:53:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:18,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891136681] [2024-06-27 23:53:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:20,185 INFO 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 23:53:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:20,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891136681] [2024-06-27 23:53:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891136681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:20,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:20,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929354430] [2024-06-27 23:53:20,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:20,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:20,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:53:20,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 694 transitions, 12307 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:20,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:20,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:53:20,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:22,168 INFO L124 PetriNetUnfolderBase]: 4467/7317 cut-off events. [2024-06-27 23:53:22,168 INFO L125 PetriNetUnfolderBase]: For 1282974/1282977 co-relation queries the response was YES. [2024-06-27 23:53:22,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77421 conditions, 7317 events. 4467/7317 cut-off events. For 1282974/1282977 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 48975 event pairs, 1176 based on Foata normal form. 4/7301 useless extension candidates. Maximal degree in co-relation 77229. Up to 5993 conditions per place. [2024-06-27 23:53:22,295 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 440 selfloop transitions, 273 changer transitions 0/718 dead transitions. [2024-06-27 23:53:22,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 718 transitions, 14819 flow [2024-06-27 23:53:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:53:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:53:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:53:22,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:53:22,297 INFO L175 Difference]: Start difference. First operand has 405 places, 694 transitions, 12307 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:53:22,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 718 transitions, 14819 flow [2024-06-27 23:53:27,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 718 transitions, 14576 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-27 23:53:27,263 INFO L231 Difference]: Finished difference. Result has 412 places, 702 transitions, 12874 flow [2024-06-27 23:53:27,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12066, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12874, PETRI_PLACES=412, PETRI_TRANSITIONS=702} [2024-06-27 23:53:27,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 23:53:27,264 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 702 transitions, 12874 flow [2024-06-27 23:53:27,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:27,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:27,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:53:27,265 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:27,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:27,266 INFO L85 PathProgramCache]: Analyzing trace with hash 125623444, now seen corresponding path program 3 times [2024-06-27 23:53:27,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:27,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890622221] [2024-06-27 23:53:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:27,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:28,580 INFO 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 23:53:28,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:28,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890622221] [2024-06-27 23:53:28,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890622221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:28,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:28,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:53:28,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966039473] [2024-06-27 23:53:28,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:28,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:53:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:53:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:53:28,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:53:28,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 702 transitions, 12874 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:28,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:28,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:53:28,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:30,668 INFO L124 PetriNetUnfolderBase]: 4472/7318 cut-off events. [2024-06-27 23:53:30,669 INFO L125 PetriNetUnfolderBase]: For 1292838/1292844 co-relation queries the response was YES. [2024-06-27 23:53:30,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78386 conditions, 7318 events. 4472/7318 cut-off events. For 1292838/1292844 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 48954 event pairs, 1316 based on Foata normal form. 5/7318 useless extension candidates. Maximal degree in co-relation 78190. Up to 6771 conditions per place. [2024-06-27 23:53:30,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 642 selfloop transitions, 70 changer transitions 0/717 dead transitions. [2024-06-27 23:53:30,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 717 transitions, 14680 flow [2024-06-27 23:53:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:53:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:53:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:53:30,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 23:53:30,793 INFO L175 Difference]: Start difference. First operand has 412 places, 702 transitions, 12874 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:53:30,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 717 transitions, 14680 flow [2024-06-27 23:53:35,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 717 transitions, 14073 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-27 23:53:35,614 INFO L231 Difference]: Finished difference. Result has 415 places, 705 transitions, 12535 flow [2024-06-27 23:53:35,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12267, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12535, PETRI_PLACES=415, PETRI_TRANSITIONS=705} [2024-06-27 23:53:35,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-27 23:53:35,615 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 705 transitions, 12535 flow [2024-06-27 23:53:35,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:35,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:35,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:53:35,616 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:35,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash 525120320, now seen corresponding path program 7 times [2024-06-27 23:53:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:35,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291555404] [2024-06-27 23:53:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:36,899 INFO 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 23:53:36,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:36,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291555404] [2024-06-27 23:53:36,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291555404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:36,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:36,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:36,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746337288] [2024-06-27 23:53:36,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:36,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:36,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:53:36,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 705 transitions, 12535 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:36,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:36,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:53:36,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:38,936 INFO L124 PetriNetUnfolderBase]: 4516/7390 cut-off events. [2024-06-27 23:53:38,937 INFO L125 PetriNetUnfolderBase]: For 1343805/1343808 co-relation queries the response was YES. [2024-06-27 23:53:39,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78864 conditions, 7390 events. 4516/7390 cut-off events. For 1343805/1343808 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 49510 event pairs, 1179 based on Foata normal form. 4/7374 useless extension candidates. Maximal degree in co-relation 78668. Up to 6043 conditions per place. [2024-06-27 23:53:39,065 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 479 selfloop transitions, 249 changer transitions 0/733 dead transitions. [2024-06-27 23:53:39,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 733 transitions, 15205 flow [2024-06-27 23:53:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:53:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:53:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:53:39,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:53:39,066 INFO L175 Difference]: Start difference. First operand has 415 places, 705 transitions, 12535 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:53:39,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 733 transitions, 15205 flow [2024-06-27 23:53:43,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 733 transitions, 14977 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 23:53:43,880 INFO L231 Difference]: Finished difference. Result has 420 places, 716 transitions, 13113 flow [2024-06-27 23:53:43,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12307, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13113, PETRI_PLACES=420, PETRI_TRANSITIONS=716} [2024-06-27 23:53:43,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-27 23:53:43,881 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 716 transitions, 13113 flow [2024-06-27 23:53:43,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:43,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:43,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:43,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:53:43,882 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:43,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:43,900 INFO L85 PathProgramCache]: Analyzing trace with hash 820321978, now seen corresponding path program 4 times [2024-06-27 23:53:43,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:43,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630841502] [2024-06-27 23:53:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:43,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:45,272 INFO 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 23:53:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:45,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630841502] [2024-06-27 23:53:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630841502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:45,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:45,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:53:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976626644] [2024-06-27 23:53:45,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:45,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:53:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:45,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:53:45,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:53:45,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:53:45,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 716 transitions, 13113 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:45,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:45,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:53:45,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:47,345 INFO L124 PetriNetUnfolderBase]: 4513/7376 cut-off events. [2024-06-27 23:53:47,345 INFO L125 PetriNetUnfolderBase]: For 1355588/1355588 co-relation queries the response was YES. [2024-06-27 23:53:47,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79491 conditions, 7376 events. 4513/7376 cut-off events. For 1355588/1355588 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 49344 event pairs, 1597 based on Foata normal form. 1/7375 useless extension candidates. Maximal degree in co-relation 79292. Up to 6913 conditions per place. [2024-06-27 23:53:47,477 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 700 selfloop transitions, 22 changer transitions 0/727 dead transitions. [2024-06-27 23:53:47,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 727 transitions, 14587 flow [2024-06-27 23:53:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:53:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:53:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 23:53:47,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 23:53:47,479 INFO L175 Difference]: Start difference. First operand has 420 places, 716 transitions, 13113 flow. Second operand 9 states and 148 transitions. [2024-06-27 23:53:47,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 727 transitions, 14587 flow [2024-06-27 23:53:52,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 727 transitions, 14025 flow, removed 108 selfloop flow, removed 5 redundant places. [2024-06-27 23:53:52,426 INFO L231 Difference]: Finished difference. Result has 424 places, 716 transitions, 12601 flow [2024-06-27 23:53:52,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12551, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12601, PETRI_PLACES=424, PETRI_TRANSITIONS=716} [2024-06-27 23:53:52,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 23:53:52,427 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 716 transitions, 12601 flow [2024-06-27 23:53:52,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:52,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:52,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:53:52,427 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 525108230, now seen corresponding path program 8 times [2024-06-27 23:53:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:52,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737210549] [2024-06-27 23:53:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:53,689 INFO 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 23:53:53,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:53,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737210549] [2024-06-27 23:53:53,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737210549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:53,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:53,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:53,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169314104] [2024-06-27 23:53:53,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:53,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:53,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:53,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:53,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:53:53,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 716 transitions, 12601 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:53,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:53,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:53:53,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:55,819 INFO L124 PetriNetUnfolderBase]: 4507/7376 cut-off events. [2024-06-27 23:53:55,820 INFO L125 PetriNetUnfolderBase]: For 1365656/1365659 co-relation queries the response was YES. [2024-06-27 23:53:55,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78423 conditions, 7376 events. 4507/7376 cut-off events. For 1365656/1365659 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 49396 event pairs, 1179 based on Foata normal form. 4/7361 useless extension candidates. Maximal degree in co-relation 78223. Up to 6034 conditions per place. [2024-06-27 23:53:55,943 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 473 selfloop transitions, 254 changer transitions 0/732 dead transitions. [2024-06-27 23:53:55,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 732 transitions, 14767 flow [2024-06-27 23:53:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:53:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:53:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:53:55,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:53:55,945 INFO L175 Difference]: Start difference. First operand has 424 places, 716 transitions, 12601 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:53:55,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 732 transitions, 14767 flow [2024-06-27 23:54:00,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 732 transitions, 14713 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 23:54:00,704 INFO L231 Difference]: Finished difference. Result has 425 places, 717 transitions, 13142 flow [2024-06-27 23:54:00,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12547, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13142, PETRI_PLACES=425, PETRI_TRANSITIONS=717} [2024-06-27 23:54:00,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-27 23:54:00,705 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 717 transitions, 13142 flow [2024-06-27 23:54:00,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:00,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:00,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:00,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:54:00,706 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:00,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 525120754, now seen corresponding path program 5 times [2024-06-27 23:54:00,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985496440] [2024-06-27 23:54:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:00,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:01,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:01,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985496440] [2024-06-27 23:54:01,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985496440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:01,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:01,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:54:01,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203125053] [2024-06-27 23:54:01,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:01,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:54:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:54:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:54:02,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:54:02,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 717 transitions, 13142 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:02,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:02,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:54:02,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:04,066 INFO L124 PetriNetUnfolderBase]: 4504/7366 cut-off events. [2024-06-27 23:54:04,066 INFO L125 PetriNetUnfolderBase]: For 1379497/1379503 co-relation queries the response was YES. [2024-06-27 23:54:04,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79220 conditions, 7366 events. 4504/7366 cut-off events. For 1379497/1379503 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 49320 event pairs, 1315 based on Foata normal form. 5/7366 useless extension candidates. Maximal degree in co-relation 79019. Up to 6818 conditions per place. [2024-06-27 23:54:04,218 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 650 selfloop transitions, 73 changer transitions 0/728 dead transitions. [2024-06-27 23:54:04,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 728 transitions, 14618 flow [2024-06-27 23:54:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:54:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:54:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 23:54:04,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:54:04,219 INFO L175 Difference]: Start difference. First operand has 425 places, 717 transitions, 13142 flow. Second operand 8 states and 152 transitions. [2024-06-27 23:54:04,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 728 transitions, 14618 flow [2024-06-27 23:54:08,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 728 transitions, 14074 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-27 23:54:08,479 INFO L231 Difference]: Finished difference. Result has 428 places, 717 transitions, 12750 flow [2024-06-27 23:54:08,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12598, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12750, PETRI_PLACES=428, PETRI_TRANSITIONS=717} [2024-06-27 23:54:08,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 23:54:08,480 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 717 transitions, 12750 flow [2024-06-27 23:54:08,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:08,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:08,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:08,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:54:08,480 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:08,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 125610920, now seen corresponding path program 9 times [2024-06-27 23:54:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935988566] [2024-06-27 23:54:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:09,703 INFO 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 23:54:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935988566] [2024-06-27 23:54:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935988566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:09,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:09,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:09,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152004294] [2024-06-27 23:54:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:09,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 717 transitions, 12750 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:11,765 INFO L124 PetriNetUnfolderBase]: 4514/7390 cut-off events. [2024-06-27 23:54:11,765 INFO L125 PetriNetUnfolderBase]: For 1402865/1402868 co-relation queries the response was YES. [2024-06-27 23:54:11,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78807 conditions, 7390 events. 4514/7390 cut-off events. For 1402865/1402868 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 49541 event pairs, 1178 based on Foata normal form. 4/7374 useless extension candidates. Maximal degree in co-relation 78606. Up to 6040 conditions per place. [2024-06-27 23:54:11,909 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 500 selfloop transitions, 233 changer transitions 0/738 dead transitions. [2024-06-27 23:54:11,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 738 transitions, 15476 flow [2024-06-27 23:54:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:54:11,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 23:54:11,911 INFO L175 Difference]: Start difference. First operand has 428 places, 717 transitions, 12750 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:54:11,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 738 transitions, 15476 flow [2024-06-27 23:54:18,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 738 transitions, 15276 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 23:54:18,480 INFO L231 Difference]: Finished difference. Result has 429 places, 721 transitions, 13161 flow [2024-06-27 23:54:18,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13161, PETRI_PLACES=429, PETRI_TRANSITIONS=721} [2024-06-27 23:54:18,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-27 23:54:18,481 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 721 transitions, 13161 flow [2024-06-27 23:54:18,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:18,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:18,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:18,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:54:18,482 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:18,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash 125623010, now seen corresponding path program 10 times [2024-06-27 23:54:18,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:18,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275197720] [2024-06-27 23:54:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:19,806 INFO 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 23:54:19,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:19,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275197720] [2024-06-27 23:54:19,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275197720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:19,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:19,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195907747] [2024-06-27 23:54:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:19,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:19,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:19,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:19,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 721 transitions, 13161 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:19,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:19,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:19,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:21,976 INFO L124 PetriNetUnfolderBase]: 4510/7388 cut-off events. [2024-06-27 23:54:21,976 INFO L125 PetriNetUnfolderBase]: For 1413317/1413320 co-relation queries the response was YES. [2024-06-27 23:54:22,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79287 conditions, 7388 events. 4510/7388 cut-off events. For 1413317/1413320 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 49604 event pairs, 1178 based on Foata normal form. 4/7372 useless extension candidates. Maximal degree in co-relation 79084. Up to 6038 conditions per place. [2024-06-27 23:54:22,112 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 500 selfloop transitions, 232 changer transitions 0/737 dead transitions. [2024-06-27 23:54:22,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 737 transitions, 15513 flow [2024-06-27 23:54:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:54:22,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 23:54:22,114 INFO L175 Difference]: Start difference. First operand has 429 places, 721 transitions, 13161 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:54:22,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 737 transitions, 15513 flow [2024-06-27 23:54:28,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 737 transitions, 14931 flow, removed 112 selfloop flow, removed 7 redundant places. [2024-06-27 23:54:28,124 INFO L231 Difference]: Finished difference. Result has 431 places, 721 transitions, 13051 flow [2024-06-27 23:54:28,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12579, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13051, PETRI_PLACES=431, PETRI_TRANSITIONS=721} [2024-06-27 23:54:28,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-27 23:54:28,125 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 721 transitions, 13051 flow [2024-06-27 23:54:28,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:28,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:28,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:28,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:54:28,125 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:28,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash 897681508, now seen corresponding path program 5 times [2024-06-27 23:54:28,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:28,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578820112] [2024-06-27 23:54:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:28,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:29,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578820112] [2024-06-27 23:54:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578820112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:29,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:29,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:54:29,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290152759] [2024-06-27 23:54:29,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:54:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:54:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:54:29,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:54:29,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 721 transitions, 13051 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 23:54:29,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:29,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:54:29,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:31,400 INFO L124 PetriNetUnfolderBase]: 4526/7442 cut-off events. [2024-06-27 23:54:31,401 INFO L125 PetriNetUnfolderBase]: For 1459923/1459928 co-relation queries the response was YES. [2024-06-27 23:54:31,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79885 conditions, 7442 events. 4526/7442 cut-off events. For 1459923/1459928 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 50467 event pairs, 1151 based on Foata normal form. 8/7445 useless extension candidates. Maximal degree in co-relation 79683. Up to 6508 conditions per place. [2024-06-27 23:54:31,542 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 632 selfloop transitions, 76 changer transitions 0/763 dead transitions. [2024-06-27 23:54:31,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 763 transitions, 14841 flow [2024-06-27 23:54:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:54:31,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 23:54:31,543 INFO L175 Difference]: Start difference. First operand has 431 places, 721 transitions, 13051 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:54:31,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 763 transitions, 14841 flow [2024-06-27 23:54:36,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 763 transitions, 14306 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 23:54:36,852 INFO L231 Difference]: Finished difference. Result has 432 places, 733 transitions, 12987 flow [2024-06-27 23:54:36,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12516, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12987, PETRI_PLACES=432, PETRI_TRANSITIONS=733} [2024-06-27 23:54:36,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 23:54:36,853 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 733 transitions, 12987 flow [2024-06-27 23:54:36,853 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 23:54:36,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:36,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:54:36,854 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:36,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2125254888, now seen corresponding path program 6 times [2024-06-27 23:54:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:36,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109979665] [2024-06-27 23:54:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:37,924 INFO 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 23:54:37,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:37,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109979665] [2024-06-27 23:54:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109979665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:37,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:37,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:54:37,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815024948] [2024-06-27 23:54:37,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:54:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:54:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:54:38,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:54:38,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 733 transitions, 12987 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 23:54:38,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:38,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:54:38,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:40,491 INFO L124 PetriNetUnfolderBase]: 4547/7484 cut-off events. [2024-06-27 23:54:40,491 INFO L125 PetriNetUnfolderBase]: For 1524365/1524371 co-relation queries the response was YES. [2024-06-27 23:54:40,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80583 conditions, 7484 events. 4547/7484 cut-off events. For 1524365/1524371 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 50827 event pairs, 1170 based on Foata normal form. 8/7486 useless extension candidates. Maximal degree in co-relation 80381. Up to 6596 conditions per place. [2024-06-27 23:54:40,700 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 628 selfloop transitions, 81 changer transitions 0/764 dead transitions. [2024-06-27 23:54:40,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 764 transitions, 14659 flow [2024-06-27 23:54:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:54:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:54:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:54:40,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 23:54:40,701 INFO L175 Difference]: Start difference. First operand has 432 places, 733 transitions, 12987 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:54:40,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 764 transitions, 14659 flow [2024-06-27 23:54:45,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 764 transitions, 14416 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-27 23:54:45,361 INFO L231 Difference]: Finished difference. Result has 437 places, 739 transitions, 13105 flow [2024-06-27 23:54:45,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12744, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13105, PETRI_PLACES=437, PETRI_TRANSITIONS=739} [2024-06-27 23:54:45,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-27 23:54:45,362 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 739 transitions, 13105 flow [2024-06-27 23:54:45,362 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 23:54:45,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:45,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:45,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:54:45,363 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:45,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash 227014878, now seen corresponding path program 11 times [2024-06-27 23:54:45,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:45,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126911740] [2024-06-27 23:54:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:45,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:46,579 INFO 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 23:54:46,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:46,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126911740] [2024-06-27 23:54:46,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126911740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:46,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:46,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:46,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095358641] [2024-06-27 23:54:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:46,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:46,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:46,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:46,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:46,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 739 transitions, 13105 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:46,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:46,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:46,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:49,332 INFO L124 PetriNetUnfolderBase]: 4645/7590 cut-off events. [2024-06-27 23:54:49,332 INFO L125 PetriNetUnfolderBase]: For 1488177/1488182 co-relation queries the response was YES. [2024-06-27 23:54:49,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81407 conditions, 7590 events. 4645/7590 cut-off events. For 1488177/1488182 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 51085 event pairs, 1162 based on Foata normal form. 6/7593 useless extension candidates. Maximal degree in co-relation 81203. Up to 6897 conditions per place. [2024-06-27 23:54:49,459 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 674 selfloop transitions, 91 changer transitions 0/770 dead transitions. [2024-06-27 23:54:49,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 770 transitions, 14914 flow [2024-06-27 23:54:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:54:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:54:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 23:54:49,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 23:54:49,461 INFO L175 Difference]: Start difference. First operand has 437 places, 739 transitions, 13105 flow. Second operand 10 states and 184 transitions. [2024-06-27 23:54:49,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 770 transitions, 14914 flow [2024-06-27 23:54:55,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 770 transitions, 14623 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-27 23:54:55,476 INFO L231 Difference]: Finished difference. Result has 441 places, 747 transitions, 13234 flow [2024-06-27 23:54:55,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12814, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13234, PETRI_PLACES=441, PETRI_TRANSITIONS=747} [2024-06-27 23:54:55,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-27 23:54:55,477 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 747 transitions, 13234 flow [2024-06-27 23:54:55,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:55,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:55,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:55,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:54:55,478 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:55,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash -584923352, now seen corresponding path program 7 times [2024-06-27 23:54:55,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:55,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720561063] [2024-06-27 23:54:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:55,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:56,391 INFO 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 23:54:56,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:56,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720561063] [2024-06-27 23:54:56,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720561063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:56,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:56,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:56,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188409797] [2024-06-27 23:54:56,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:56,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 23:54:56,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 747 transitions, 13234 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 23:54:56,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:56,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 23:54:56,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:58,810 INFO L124 PetriNetUnfolderBase]: 3845/6713 cut-off events. [2024-06-27 23:54:58,810 INFO L125 PetriNetUnfolderBase]: For 1601503/1601763 co-relation queries the response was YES. [2024-06-27 23:54:58,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74448 conditions, 6713 events. 3845/6713 cut-off events. For 1601503/1601763 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 48746 event pairs, 532 based on Foata normal form. 122/6679 useless extension candidates. Maximal degree in co-relation 74243. Up to 4585 conditions per place. [2024-06-27 23:54:58,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 116 changer transitions 0/799 dead transitions. [2024-06-27 23:54:58,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 799 transitions, 15031 flow [2024-06-27 23:54:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:54:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:54:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 23:54:58,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 23:54:58,927 INFO L175 Difference]: Start difference. First operand has 441 places, 747 transitions, 13234 flow. Second operand 8 states and 180 transitions. [2024-06-27 23:54:58,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 799 transitions, 15031 flow [2024-06-27 23:55:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 799 transitions, 14746 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 23:55:02,303 INFO L231 Difference]: Finished difference. Result has 443 places, 773 transitions, 13877 flow [2024-06-27 23:55:02,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12949, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13877, PETRI_PLACES=443, PETRI_TRANSITIONS=773} [2024-06-27 23:55:02,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-27 23:55:02,304 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 773 transitions, 13877 flow [2024-06-27 23:55:02,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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 23:55:02,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:02,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:02,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:55:02,304 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:02,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash 514260258, now seen corresponding path program 12 times [2024-06-27 23:55:02,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:02,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891248531] [2024-06-27 23:55:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:02,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:03,567 INFO 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 23:55:03,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:03,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891248531] [2024-06-27 23:55:03,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891248531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:03,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:03,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:55:03,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639082128] [2024-06-27 23:55:03,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:03,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:55:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:55:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:55:03,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:55:03,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 773 transitions, 13877 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:03,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:03,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:55:03,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:06,415 INFO L124 PetriNetUnfolderBase]: 4844/7890 cut-off events. [2024-06-27 23:55:06,416 INFO L125 PetriNetUnfolderBase]: For 1615539/1615539 co-relation queries the response was YES. [2024-06-27 23:55:06,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86566 conditions, 7890 events. 4844/7890 cut-off events. For 1615539/1615539 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 53252 event pairs, 1127 based on Foata normal form. 3/7888 useless extension candidates. Maximal degree in co-relation 86358. Up to 6591 conditions per place. [2024-06-27 23:55:06,550 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 596 selfloop transitions, 251 changer transitions 0/852 dead transitions. [2024-06-27 23:55:06,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 852 transitions, 17636 flow [2024-06-27 23:55:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:55:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:55:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:55:06,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-27 23:55:06,552 INFO L175 Difference]: Start difference. First operand has 443 places, 773 transitions, 13877 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:55:06,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 852 transitions, 17636 flow [2024-06-27 23:55:12,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 852 transitions, 17387 flow, removed 120 selfloop flow, removed 2 redundant places. [2024-06-27 23:55:13,000 INFO L231 Difference]: Finished difference. Result has 454 places, 818 transitions, 15465 flow [2024-06-27 23:55:13,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13638, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15465, PETRI_PLACES=454, PETRI_TRANSITIONS=818} [2024-06-27 23:55:13,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-27 23:55:13,001 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 818 transitions, 15465 flow [2024-06-27 23:55:13,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:13,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:13,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:13,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 23:55:13,001 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:13,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1123394470, now seen corresponding path program 13 times [2024-06-27 23:55:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:13,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796639626] [2024-06-27 23:55:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:14,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796639626] [2024-06-27 23:55:14,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796639626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:14,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:14,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:55:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520958926] [2024-06-27 23:55:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:55:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:55:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:55:14,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:55:14,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 818 transitions, 15465 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:14,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:14,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:55:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:17,097 INFO L124 PetriNetUnfolderBase]: 4859/7916 cut-off events. [2024-06-27 23:55:17,098 INFO L125 PetriNetUnfolderBase]: For 1600047/1600052 co-relation queries the response was YES. [2024-06-27 23:55:17,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87361 conditions, 7916 events. 4859/7916 cut-off events. For 1600047/1600052 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 53653 event pairs, 1227 based on Foata normal form. 5/7918 useless extension candidates. Maximal degree in co-relation 87148. Up to 7209 conditions per place. [2024-06-27 23:55:17,258 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 749 selfloop transitions, 97 changer transitions 0/851 dead transitions. [2024-06-27 23:55:17,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 851 transitions, 17447 flow [2024-06-27 23:55:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:55:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:55:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 23:55:17,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:55:17,260 INFO L175 Difference]: Start difference. First operand has 454 places, 818 transitions, 15465 flow. Second operand 10 states and 185 transitions. [2024-06-27 23:55:17,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 851 transitions, 17447 flow [2024-06-27 23:55:22,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 851 transitions, 17111 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:22,788 INFO L231 Difference]: Finished difference. Result has 460 places, 826 transitions, 15561 flow [2024-06-27 23:55:22,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15129, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15561, PETRI_PLACES=460, PETRI_TRANSITIONS=826} [2024-06-27 23:55:22,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-27 23:55:22,789 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 826 transitions, 15561 flow [2024-06-27 23:55:22,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:22,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:22,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:22,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 23:55:22,790 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:22,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1667785640, now seen corresponding path program 13 times [2024-06-27 23:55:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:22,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238491455] [2024-06-27 23:55:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:22,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:24,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:24,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238491455] [2024-06-27 23:55:24,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238491455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:24,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:24,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:24,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496655760] [2024-06-27 23:55:24,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:24,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:24,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:24,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:24,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:55:24,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 826 transitions, 15561 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 23:55:24,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:24,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:55:24,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:26,870 INFO L124 PetriNetUnfolderBase]: 4779/7831 cut-off events. [2024-06-27 23:55:26,870 INFO L125 PetriNetUnfolderBase]: For 1615999/1615999 co-relation queries the response was YES. [2024-06-27 23:55:26,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87001 conditions, 7831 events. 4779/7831 cut-off events. For 1615999/1615999 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 53288 event pairs, 1087 based on Foata normal form. 2/7828 useless extension candidates. Maximal degree in co-relation 86786. Up to 6768 conditions per place. [2024-06-27 23:55:27,013 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 683 selfloop transitions, 119 changer transitions 0/858 dead transitions. [2024-06-27 23:55:27,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 858 transitions, 17358 flow [2024-06-27 23:55:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:55:27,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 23:55:27,015 INFO L175 Difference]: Start difference. First operand has 460 places, 826 transitions, 15561 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:55:27,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 858 transitions, 17358 flow [2024-06-27 23:55:33,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 858 transitions, 17032 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 23:55:33,348 INFO L231 Difference]: Finished difference. Result has 462 places, 830 transitions, 15560 flow [2024-06-27 23:55:33,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15235, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15560, PETRI_PLACES=462, PETRI_TRANSITIONS=830} [2024-06-27 23:55:33,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-27 23:55:33,349 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 830 transitions, 15560 flow [2024-06-27 23:55:33,349 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 23:55:33,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:33,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:33,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 23:55:33,349 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:33,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:33,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1359966926, now seen corresponding path program 13 times [2024-06-27 23:55:33,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:33,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370444797] [2024-06-27 23:55:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:33,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:34,337 INFO 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 23:55:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370444797] [2024-06-27 23:55:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370444797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:34,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508317432] [2024-06-27 23:55:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:34,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:34,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:55:34,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 830 transitions, 15560 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:55:34,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:55:34,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:37,213 INFO L124 PetriNetUnfolderBase]: 4867/7921 cut-off events. [2024-06-27 23:55:37,213 INFO L125 PetriNetUnfolderBase]: For 1615722/1615725 co-relation queries the response was YES. [2024-06-27 23:55:37,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87316 conditions, 7921 events. 4867/7921 cut-off events. For 1615722/1615725 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 53589 event pairs, 1180 based on Foata normal form. 4/7922 useless extension candidates. Maximal degree in co-relation 87100. Up to 7242 conditions per place. [2024-06-27 23:55:37,354 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 776 selfloop transitions, 75 changer transitions 0/856 dead transitions. [2024-06-27 23:55:37,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 856 transitions, 17424 flow [2024-06-27 23:55:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:55:37,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:55:37,355 INFO L175 Difference]: Start difference. First operand has 462 places, 830 transitions, 15560 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:55:37,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 856 transitions, 17424 flow [2024-06-27 23:55:42,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 856 transitions, 17165 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 23:55:42,974 INFO L231 Difference]: Finished difference. Result has 464 places, 834 transitions, 15557 flow [2024-06-27 23:55:42,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15301, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15557, PETRI_PLACES=464, PETRI_TRANSITIONS=834} [2024-06-27 23:55:42,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-27 23:55:42,974 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 834 transitions, 15557 flow [2024-06-27 23:55:42,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:55:42,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:42,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 23:55:42,975 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:42,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash 336882908, now seen corresponding path program 14 times [2024-06-27 23:55:42,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158676241] [2024-06-27 23:55:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:44,390 INFO 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 23:55:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:44,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158676241] [2024-06-27 23:55:44,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158676241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:44,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:44,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312148594] [2024-06-27 23:55:44,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:44,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:44,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:44,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:55:44,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 834 transitions, 15557 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 23:55:44,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:44,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:55:44,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:47,136 INFO L124 PetriNetUnfolderBase]: 4787/7843 cut-off events. [2024-06-27 23:55:47,136 INFO L125 PetriNetUnfolderBase]: For 1629123/1629123 co-relation queries the response was YES. [2024-06-27 23:55:47,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86657 conditions, 7843 events. 4787/7843 cut-off events. For 1629123/1629123 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 53467 event pairs, 1083 based on Foata normal form. 2/7840 useless extension candidates. Maximal degree in co-relation 86440. Up to 6754 conditions per place. [2024-06-27 23:55:47,285 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 673 selfloop transitions, 133 changer transitions 0/863 dead transitions. [2024-06-27 23:55:47,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 863 transitions, 17334 flow [2024-06-27 23:55:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 23:55:47,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 23:55:47,287 INFO L175 Difference]: Start difference. First operand has 464 places, 834 transitions, 15557 flow. Second operand 9 states and 181 transitions. [2024-06-27 23:55:47,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 863 transitions, 17334 flow [2024-06-27 23:55:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 863 transitions, 17085 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 23:55:53,108 INFO L231 Difference]: Finished difference. Result has 466 places, 838 transitions, 15647 flow [2024-06-27 23:55:53,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15308, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15647, PETRI_PLACES=466, PETRI_TRANSITIONS=838} [2024-06-27 23:55:53,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-27 23:55:53,109 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 838 transitions, 15647 flow [2024-06-27 23:55:53,109 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 23:55:53,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:53,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:53,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 23:55:53,110 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:53,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:53,110 INFO L85 PathProgramCache]: Analyzing trace with hash 514014614, now seen corresponding path program 14 times [2024-06-27 23:55:53,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:53,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428286291] [2024-06-27 23:55:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:53,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:54,239 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 23:55:54,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428286291] [2024-06-27 23:55:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428286291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:54,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:54,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:54,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077211177] [2024-06-27 23:55:54,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:54,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:54,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:54,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:55:54,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 838 transitions, 15647 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:55:54,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:54,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:55:54,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:56,924 INFO L124 PetriNetUnfolderBase]: 4865/7926 cut-off events. [2024-06-27 23:55:56,925 INFO L125 PetriNetUnfolderBase]: For 1632796/1632799 co-relation queries the response was YES. [2024-06-27 23:55:57,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86984 conditions, 7926 events. 4865/7926 cut-off events. For 1632796/1632799 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 53690 event pairs, 1192 based on Foata normal form. 4/7927 useless extension candidates. Maximal degree in co-relation 86766. Up to 7037 conditions per place. [2024-06-27 23:55:57,261 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 700 selfloop transitions, 153 changer transitions 0/858 dead transitions. [2024-06-27 23:55:57,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 858 transitions, 17675 flow [2024-06-27 23:55:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:55:57,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:55:57,262 INFO L175 Difference]: Start difference. First operand has 466 places, 838 transitions, 15647 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:55:57,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 858 transitions, 17675 flow [2024-06-27 23:56:02,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 858 transitions, 17254 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 23:56:02,743 INFO L231 Difference]: Finished difference. Result has 466 places, 838 transitions, 15544 flow [2024-06-27 23:56:02,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15226, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15544, PETRI_PLACES=466, PETRI_TRANSITIONS=838} [2024-06-27 23:56:02,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-27 23:56:02,744 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 838 transitions, 15544 flow [2024-06-27 23:56:02,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 23:56:02,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:02,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:02,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 23:56:02,744 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:02,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash 514014428, now seen corresponding path program 15 times [2024-06-27 23:56:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:02,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913776080] [2024-06-27 23:56:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:02,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat