./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.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-nonrel/safe019_rmo.oepc.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/safe019_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_rmo.oepc.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 [2024-06-28 04:19:29,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:19:29,972 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:19:29,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:19:29,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:19:30,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:19:30,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:19:30,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:19:30,009 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:19:30,013 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:19:30,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:19:30,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:19:30,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:19:30,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:19:30,016 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:19:30,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:19:30,017 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:19:30,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:19:30,018 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:19:30,018 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:19:30,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:19:30,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:19:30,019 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:19:30,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:19:30,020 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:19:30,020 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:19:30,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:19:30,020 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:19:30,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:19:30,021 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:19:30,022 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:19:30,023 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:19:30,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:19:30,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:19:30,023 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:19:30,023 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:19:30,028 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:19:30,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:19:30,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:19:30,028 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:19:30,029 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:19:30,029 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:19:30,029 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:19:30,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:19:30,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:19:30,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:19:30,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:19:30,338 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:19:30,339 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:19:30,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_rmo.oepc.yml/witness.yml [2024-06-28 04:19:30,605 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:19:30,606 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:19:30,607 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-28 04:19:31,827 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:19:32,091 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:19:32,092 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-28 04:19:32,112 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bdafed8/c6c3d6ae63c742f9939512824da823fa/FLAG4a0f1074c [2024-06-28 04:19:32,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bdafed8/c6c3d6ae63c742f9939512824da823fa [2024-06-28 04:19:32,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:19:32,125 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:19:32,126 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:19:32,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:19:32,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:19:32,131 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:19:30" (1/2) ... [2024-06-28 04:19:32,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33884c8b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:19:32, skipping insertion in model container [2024-06-28 04:19:32,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:19:30" (1/2) ... [2024-06-28 04:19:32,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ca99697 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:19:32, skipping insertion in model container [2024-06-28 04:19:32,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:19:32" (2/2) ... [2024-06-28 04:19:32,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33884c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:32, skipping insertion in model container [2024-06-28 04:19:32,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:19:32" (2/2) ... [2024-06-28 04:19:32,135 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:19:32,322 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:19:32,323 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-28 04:19:32,324 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-28 04:19:32,324 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-28 04:19:32,325 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((((((! multithreaded || y$w_buff0_used == (_Bool)0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0) [2024-06-28 04:19:32,325 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:19:32,326 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-28 04:19:32,379 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:19:32,781 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:19:32,799 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:19:33,006 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:19:33,053 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:19:33,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33 WrapperNode [2024-06-28 04:19:33,054 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:19:33,055 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:19:33,055 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:19:33,056 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:19:33,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,149 INFO L138 Inliner]: procedures = 176, calls = 118, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 328 [2024-06-28 04:19:33,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:19:33,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:19:33,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:19:33,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:19:33,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,179 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,217 INFO L175 MemorySlicer]: Split 72 memory accesses to 2 slices as follows [2, 70]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-28 04:19:33,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,238 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,259 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:19:33,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:19:33,275 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:19:33,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:19:33,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (1/1) ... [2024-06-28 04:19:33,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:19:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:19:33,305 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) [2024-06-28 04:19:33,334 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 [2024-06-28 04:19:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:19:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:19:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:19:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:19:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:19:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:19:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:19:33,352 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:19:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:19:33,352 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:19:33,352 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:19:33,353 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:19:33,353 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 04:19:33,353 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 04:19:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:19:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:19:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:19:33,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:19:33,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:19:33,357 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 04:19:33,546 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:19:33,547 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:19:34,226 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:19:34,226 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:19:34,935 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:19:34,936 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:19:34,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:19:34 BoogieIcfgContainer [2024-06-28 04:19:34,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:19:34,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:19:34,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:19:34,941 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:19:34,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:19:30" (1/4) ... [2024-06-28 04:19:34,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b6237 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:19:34, skipping insertion in model container [2024-06-28 04:19:34,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:19:32" (2/4) ... [2024-06-28 04:19:34,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b6237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:19:34, skipping insertion in model container [2024-06-28 04:19:34,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:19:33" (3/4) ... [2024-06-28 04:19:34,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b6237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:19:34, skipping insertion in model container [2024-06-28 04:19:34,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:19:34" (4/4) ... [2024-06-28 04:19:34,945 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.oepc.i [2024-06-28 04:19:34,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:19:34,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 04:19:34,963 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:19:35,043 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:19:35,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 04:19:35,120 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-28 04:19:35,121 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:19:35,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:19:35,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 04:19:35,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-28 04:19:35,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:19:35,150 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;@21753217, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:19:35,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 04:19:35,158 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:19:35,158 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:19:35,159 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:19:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:35,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:19:35,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:35,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash 916095718, now seen corresponding path program 1 times [2024-06-28 04:19:35,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:35,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231961615] [2024-06-28 04:19:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:38,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231961615] [2024-06-28 04:19:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231961615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:38,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:38,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:19:38,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259371266] [2024-06-28 04:19:38,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:38,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:19:38,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:19:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:19:38,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 04:19:38,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:38,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:38,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 04:19:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:39,667 INFO L124 PetriNetUnfolderBase]: 4366/6138 cut-off events. [2024-06-28 04:19:39,668 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-28 04:19:39,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 6138 events. 4366/6138 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32228 event pairs, 3068 based on Foata normal form. 1/6032 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-28 04:19:39,711 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-28 04:19:39,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 239 flow [2024-06-28 04:19:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:19:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:19:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-28 04:19:39,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-28 04:19:39,724 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-28 04:19:39,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 239 flow [2024-06-28 04:19:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:39,730 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-28 04:19:39,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 04:19:39,735 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-28 04:19:39,736 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-28 04:19:39,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:39,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:39,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:39,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:19:39,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:39,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -100276155, now seen corresponding path program 1 times [2024-06-28 04:19:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:39,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038183370] [2024-06-28 04:19:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:39,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:43,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:43,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038183370] [2024-06-28 04:19:43,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038183370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:43,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:43,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:19:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961950257] [2024-06-28 04:19:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:43,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:19:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:19:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:19:43,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 04:19:43,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 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) [2024-06-28 04:19:43,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:43,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 04:19:43,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:44,858 INFO L124 PetriNetUnfolderBase]: 4356/6125 cut-off events. [2024-06-28 04:19:44,858 INFO L125 PetriNetUnfolderBase]: For 1259/1269 co-relation queries the response was YES. [2024-06-28 04:19:44,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14294 conditions, 6125 events. 4356/6125 cut-off events. For 1259/1269 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32028 event pairs, 2547 based on Foata normal form. 7/6127 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-28 04:19:44,908 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-28 04:19:44,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 343 flow [2024-06-28 04:19:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:19:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:19:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-28 04:19:44,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-28 04:19:44,914 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-28 04:19:44,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 343 flow [2024-06-28 04:19:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:19:44,921 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-28 04:19:44,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-28 04:19:44,923 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-28 04:19:44,923 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-28 04:19:44,928 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) [2024-06-28 04:19:44,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:44,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:44,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:19:44,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:44,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:44,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1971437454, now seen corresponding path program 1 times [2024-06-28 04:19:44,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965389094] [2024-06-28 04:19:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:44,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:48,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:48,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965389094] [2024-06-28 04:19:48,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965389094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:48,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:48,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:19:48,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254975403] [2024-06-28 04:19:48,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:48,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:19:48,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:19:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:19:48,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-28 04:19:48,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 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) [2024-06-28 04:19:48,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:48,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-28 04:19:48,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:50,689 INFO L124 PetriNetUnfolderBase]: 5530/7706 cut-off events. [2024-06-28 04:19:50,689 INFO L125 PetriNetUnfolderBase]: For 4291/4310 co-relation queries the response was YES. [2024-06-28 04:19:50,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 7706 events. 5530/7706 cut-off events. For 4291/4310 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39704 event pairs, 2395 based on Foata normal form. 14/7715 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-28 04:19:50,735 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-28 04:19:50,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 528 flow [2024-06-28 04:19:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:19:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:19:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 04:19:50,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-28 04:19:50,738 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 173 transitions. [2024-06-28 04:19:50,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 528 flow [2024-06-28 04:19:50,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 04:19:50,745 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-28 04:19:50,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-28 04:19:50,746 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-28 04:19:50,746 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-28 04:19:50,746 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) [2024-06-28 04:19:50,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:50,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:50,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:19:50,747 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:50,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2002598117, now seen corresponding path program 1 times [2024-06-28 04:19:50,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:50,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190143572] [2024-06-28 04:19:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:52,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:52,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190143572] [2024-06-28 04:19:52,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190143572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:52,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:52,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:19:52,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872770183] [2024-06-28 04:19:52,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:52,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:19:52,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:19:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:19:52,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:19:52,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:52,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:52,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:19:52,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:54,954 INFO L124 PetriNetUnfolderBase]: 6648/9210 cut-off events. [2024-06-28 04:19:54,954 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-28 04:19:54,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26380 conditions, 9210 events. 6648/9210 cut-off events. For 9702/9702 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47508 event pairs, 3316 based on Foata normal form. 3/9209 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-28 04:19:55,008 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-28 04:19:55,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 494 flow [2024-06-28 04:19:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:19:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:19:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 04:19:55,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-28 04:19:55,011 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 118 transitions. [2024-06-28 04:19:55,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 494 flow [2024-06-28 04:19:55,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 450 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 04:19:55,016 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 286 flow [2024-06-28 04:19:55,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-28 04:19:55,017 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-28 04:19:55,018 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 286 flow [2024-06-28 04:19:55,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:55,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:55,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:55,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:19:55,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:55,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:55,019 INFO L85 PathProgramCache]: Analyzing trace with hash -670506684, now seen corresponding path program 1 times [2024-06-28 04:19:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062678563] [2024-06-28 04:19:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:58,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:58,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062678563] [2024-06-28 04:19:58,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062678563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:58,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:58,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:19:58,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386518605] [2024-06-28 04:19:58,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:58,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:19:58,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:19:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:19:58,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:19:58,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:58,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:58,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:19:58,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:00,479 INFO L124 PetriNetUnfolderBase]: 6675/9240 cut-off events. [2024-06-28 04:20:00,479 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-28 04:20:00,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 9240 events. 6675/9240 cut-off events. For 14074/14074 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47568 event pairs, 3168 based on Foata normal form. 3/9236 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-28 04:20:00,545 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-28 04:20:00,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 675 flow [2024-06-28 04:20:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:20:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:20:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 04:20:00,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-28 04:20:00,549 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 286 flow. Second operand 6 states and 150 transitions. [2024-06-28 04:20:00,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 675 flow [2024-06-28 04:20:00,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 04:20:00,556 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 409 flow [2024-06-28 04:20:00,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-28 04:20:00,557 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-28 04:20:00,557 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 409 flow [2024-06-28 04:20:00,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:00,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:00,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:00,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:20:00,558 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:00,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash 650500508, now seen corresponding path program 2 times [2024-06-28 04:20:00,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:00,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110131172] [2024-06-28 04:20:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:00,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:03,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:03,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110131172] [2024-06-28 04:20:03,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110131172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:03,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:20:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538010362] [2024-06-28 04:20:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:03,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:20:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:20:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:20:03,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:03,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:03,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:03,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:03,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:05,267 INFO L124 PetriNetUnfolderBase]: 6666/9238 cut-off events. [2024-06-28 04:20:05,267 INFO L125 PetriNetUnfolderBase]: For 20629/20644 co-relation queries the response was YES. [2024-06-28 04:20:05,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31511 conditions, 9238 events. 6666/9238 cut-off events. For 20629/20644 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47632 event pairs, 3185 based on Foata normal form. 13/9244 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-28 04:20:05,331 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-28 04:20:05,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 694 flow [2024-06-28 04:20:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:20:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:20:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 04:20:05,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 04:20:05,333 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-28 04:20:05,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 694 flow [2024-06-28 04:20:05,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 04:20:05,361 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 423 flow [2024-06-28 04:20:05,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-28 04:20:05,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-28 04:20:05,365 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 423 flow [2024-06-28 04:20:05,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:05,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:05,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:05,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:20:05,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:05,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:05,367 INFO L85 PathProgramCache]: Analyzing trace with hash 618334164, now seen corresponding path program 1 times [2024-06-28 04:20:05,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:05,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210689866] [2024-06-28 04:20:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:05,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:07,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:07,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210689866] [2024-06-28 04:20:07,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210689866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:07,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:07,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:20:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425875792] [2024-06-28 04:20:07,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:07,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:20:07,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:20:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:20:07,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:07,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:07,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:07,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:07,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:09,672 INFO L124 PetriNetUnfolderBase]: 6651/9214 cut-off events. [2024-06-28 04:20:09,672 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-28 04:20:09,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 9214 events. 6651/9214 cut-off events. For 23651/23651 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47569 event pairs, 3011 based on Foata normal form. 6/9216 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-28 04:20:09,730 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-28 04:20:09,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 733 flow [2024-06-28 04:20:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:20:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:20:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 04:20:09,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-28 04:20:09,733 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 423 flow. Second operand 6 states and 141 transitions. [2024-06-28 04:20:09,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 733 flow [2024-06-28 04:20:09,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 04:20:09,761 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 454 flow [2024-06-28 04:20:09,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-28 04:20:09,761 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-28 04:20:09,762 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 454 flow [2024-06-28 04:20:09,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:09,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:09,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:09,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:20:09,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:09,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:09,763 INFO L85 PathProgramCache]: Analyzing trace with hash 689011586, now seen corresponding path program 1 times [2024-06-28 04:20:09,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070495550] [2024-06-28 04:20:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:13,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:13,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070495550] [2024-06-28 04:20:13,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070495550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:13,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:13,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:13,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827591883] [2024-06-28 04:20:13,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:13,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:13,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:13,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:13,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:13,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:13,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:13,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:15,423 INFO L124 PetriNetUnfolderBase]: 6697/9305 cut-off events. [2024-06-28 04:20:15,423 INFO L125 PetriNetUnfolderBase]: For 30778/30781 co-relation queries the response was YES. [2024-06-28 04:20:15,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33868 conditions, 9305 events. 6697/9305 cut-off events. For 30778/30781 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 48570 event pairs, 2838 based on Foata normal form. 7/9307 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-28 04:20:15,481 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-28 04:20:15,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 870 flow [2024-06-28 04:20:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 04:20:15,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-28 04:20:15,484 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 454 flow. Second operand 7 states and 176 transitions. [2024-06-28 04:20:15,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 870 flow [2024-06-28 04:20:15,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 832 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 04:20:15,517 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 526 flow [2024-06-28 04:20:15,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-28 04:20:15,520 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-28 04:20:15,520 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 526 flow [2024-06-28 04:20:15,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:15,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:15,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:15,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:20:15,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:15,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1815277166, now seen corresponding path program 2 times [2024-06-28 04:20:15,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:15,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63277898] [2024-06-28 04:20:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:18,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:18,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63277898] [2024-06-28 04:20:18,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63277898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:18,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:18,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32664212] [2024-06-28 04:20:18,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:18,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:18,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:18,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:18,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:18,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:18,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:18,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:20,961 INFO L124 PetriNetUnfolderBase]: 6724/9332 cut-off events. [2024-06-28 04:20:20,961 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-28 04:20:20,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36900 conditions, 9332 events. 6724/9332 cut-off events. For 38967/38967 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48174 event pairs, 2984 based on Foata normal form. 3/9328 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-28 04:20:21,006 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-28 04:20:21,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 145 transitions, 1096 flow [2024-06-28 04:20:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 04:20:21,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-28 04:20:21,008 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 526 flow. Second operand 7 states and 175 transitions. [2024-06-28 04:20:21,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 145 transitions, 1096 flow [2024-06-28 04:20:21,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:20:21,030 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 682 flow [2024-06-28 04:20:21,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-28 04:20:21,031 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-28 04:20:21,031 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 682 flow [2024-06-28 04:20:21,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:21,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:21,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:20:21,032 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:21,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1309318452, now seen corresponding path program 3 times [2024-06-28 04:20:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:21,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336960117] [2024-06-28 04:20:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336960117] [2024-06-28 04:20:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336960117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:23,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:23,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30164412] [2024-06-28 04:20:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:23,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:23,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:23,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 682 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:23,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:23,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:23,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:26,458 INFO L124 PetriNetUnfolderBase]: 6715/9323 cut-off events. [2024-06-28 04:20:26,458 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-28 04:20:26,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39395 conditions, 9323 events. 6715/9323 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48206 event pairs, 3001 based on Foata normal form. 3/9315 useless extension candidates. Maximal degree in co-relation 39364. Up to 9050 conditions per place. [2024-06-28 04:20:26,507 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-28 04:20:26,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1057 flow [2024-06-28 04:20:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 04:20:26,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 04:20:26,509 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 682 flow. Second operand 7 states and 168 transitions. [2024-06-28 04:20:26,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1057 flow [2024-06-28 04:20:26,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-28 04:20:26,537 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 710 flow [2024-06-28 04:20:26,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-28 04:20:26,538 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-28 04:20:26,538 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 710 flow [2024-06-28 04:20:26,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:26,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:26,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:26,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:20:26,539 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:26,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:26,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1231491195, now seen corresponding path program 1 times [2024-06-28 04:20:26,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:26,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010328091] [2024-06-28 04:20:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:26,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:29,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010328091] [2024-06-28 04:20:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010328091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:29,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012594134] [2024-06-28 04:20:29,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:29,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:29,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:29,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:29,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:29,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:31,716 INFO L124 PetriNetUnfolderBase]: 6861/9541 cut-off events. [2024-06-28 04:20:31,716 INFO L125 PetriNetUnfolderBase]: For 57471/57471 co-relation queries the response was YES. [2024-06-28 04:20:31,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41305 conditions, 9541 events. 6861/9541 cut-off events. For 57471/57471 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 49429 event pairs, 2984 based on Foata normal form. 6/9540 useless extension candidates. Maximal degree in co-relation 41272. Up to 9256 conditions per place. [2024-06-28 04:20:31,771 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 126 selfloop transitions, 42 changer transitions 0/174 dead transitions. [2024-06-28 04:20:31,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 1392 flow [2024-06-28 04:20:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-28 04:20:31,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-28 04:20:31,774 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 710 flow. Second operand 8 states and 196 transitions. [2024-06-28 04:20:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 1392 flow [2024-06-28 04:20:31,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 174 transitions, 1306 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 04:20:31,816 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 977 flow [2024-06-28 04:20:31,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=94, PETRI_TRANSITIONS=121} [2024-06-28 04:20:31,817 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-28 04:20:31,817 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 977 flow [2024-06-28 04:20:31,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:31,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:31,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:31,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:20:31,818 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:31,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:31,818 INFO L85 PathProgramCache]: Analyzing trace with hash -111749981, now seen corresponding path program 2 times [2024-06-28 04:20:31,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:31,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887853744] [2024-06-28 04:20:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:34,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887853744] [2024-06-28 04:20:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887853744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:34,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:34,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785790343] [2024-06-28 04:20:34,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:34,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:34,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:34,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:34,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 121 transitions, 977 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:34,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:34,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:34,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:37,160 INFO L124 PetriNetUnfolderBase]: 6989/9724 cut-off events. [2024-06-28 04:20:37,160 INFO L125 PetriNetUnfolderBase]: For 70335/70335 co-relation queries the response was YES. [2024-06-28 04:20:37,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44460 conditions, 9724 events. 6989/9724 cut-off events. For 70335/70335 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50448 event pairs, 2950 based on Foata normal form. 6/9717 useless extension candidates. Maximal degree in co-relation 44423. Up to 9376 conditions per place. [2024-06-28 04:20:37,222 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 121 selfloop transitions, 53 changer transitions 0/180 dead transitions. [2024-06-28 04:20:37,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 180 transitions, 1665 flow [2024-06-28 04:20:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-28 04:20:37,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2024-06-28 04:20:37,225 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 977 flow. Second operand 8 states and 181 transitions. [2024-06-28 04:20:37,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 180 transitions, 1665 flow [2024-06-28 04:20:37,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 180 transitions, 1554 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 04:20:37,281 INFO L231 Difference]: Finished difference. Result has 102 places, 138 transitions, 1259 flow [2024-06-28 04:20:37,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=102, PETRI_TRANSITIONS=138} [2024-06-28 04:20:37,282 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-28 04:20:37,282 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 138 transitions, 1259 flow [2024-06-28 04:20:37,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:37,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:37,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:20:37,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:37,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1130694815, now seen corresponding path program 3 times [2024-06-28 04:20:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:37,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409919469] [2024-06-28 04:20:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:37,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:39,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:39,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409919469] [2024-06-28 04:20:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409919469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:39,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083116610] [2024-06-28 04:20:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:39,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:40,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:40,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 138 transitions, 1259 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:40,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:40,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:40,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:42,486 INFO L124 PetriNetUnfolderBase]: 7033/9805 cut-off events. [2024-06-28 04:20:42,486 INFO L125 PetriNetUnfolderBase]: For 83017/83032 co-relation queries the response was YES. [2024-06-28 04:20:42,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46779 conditions, 9805 events. 7033/9805 cut-off events. For 83017/83032 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50893 event pairs, 2959 based on Foata normal form. 16/9809 useless extension candidates. Maximal degree in co-relation 46738. Up to 9470 conditions per place. [2024-06-28 04:20:42,545 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 129 selfloop transitions, 49 changer transitions 0/184 dead transitions. [2024-06-28 04:20:42,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 184 transitions, 1795 flow [2024-06-28 04:20:42,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-28 04:20:42,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-28 04:20:42,547 INFO L175 Difference]: Start difference. First operand has 102 places, 138 transitions, 1259 flow. Second operand 7 states and 166 transitions. [2024-06-28 04:20:42,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 184 transitions, 1795 flow [2024-06-28 04:20:42,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 184 transitions, 1703 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 04:20:42,617 INFO L231 Difference]: Finished difference. Result has 106 places, 141 transitions, 1328 flow [2024-06-28 04:20:42,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1328, PETRI_PLACES=106, PETRI_TRANSITIONS=141} [2024-06-28 04:20:42,617 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-28 04:20:42,617 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 141 transitions, 1328 flow [2024-06-28 04:20:42,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:42,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:42,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:42,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:20:42,618 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:42,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1642753945, now seen corresponding path program 4 times [2024-06-28 04:20:42,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:42,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696030316] [2024-06-28 04:20:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:42,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:45,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:45,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696030316] [2024-06-28 04:20:45,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696030316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:45,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:45,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068465321] [2024-06-28 04:20:45,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:45,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:45,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 141 transitions, 1328 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:45,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:45,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:45,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:47,549 INFO L124 PetriNetUnfolderBase]: 7018/9784 cut-off events. [2024-06-28 04:20:47,549 INFO L125 PetriNetUnfolderBase]: For 96632/96647 co-relation queries the response was YES. [2024-06-28 04:20:47,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48324 conditions, 9784 events. 7018/9784 cut-off events. For 96632/96647 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50839 event pairs, 2722 based on Foata normal form. 16/9788 useless extension candidates. Maximal degree in co-relation 48281. Up to 9249 conditions per place. [2024-06-28 04:20:47,609 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 118 selfloop transitions, 63 changer transitions 0/187 dead transitions. [2024-06-28 04:20:47,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 187 transitions, 1870 flow [2024-06-28 04:20:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 04:20:47,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-28 04:20:47,612 INFO L175 Difference]: Start difference. First operand has 106 places, 141 transitions, 1328 flow. Second operand 7 states and 167 transitions. [2024-06-28 04:20:47,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 187 transitions, 1870 flow [2024-06-28 04:20:47,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 1737 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 04:20:47,677 INFO L231 Difference]: Finished difference. Result has 108 places, 144 transitions, 1389 flow [2024-06-28 04:20:47,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=108, PETRI_TRANSITIONS=144} [2024-06-28 04:20:47,678 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-28 04:20:47,678 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 144 transitions, 1389 flow [2024-06-28 04:20:47,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:47,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:47,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:47,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:20:47,679 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:47,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1277997429, now seen corresponding path program 1 times [2024-06-28 04:20:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179598196] [2024-06-28 04:20:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:47,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:51,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179598196] [2024-06-28 04:20:51,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179598196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:51,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:51,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:20:51,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422863504] [2024-06-28 04:20:51,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:51,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:20:51,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:20:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:20:51,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:51,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 144 transitions, 1389 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:51,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:51,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:51,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:53,774 INFO L124 PetriNetUnfolderBase]: 7616/10668 cut-off events. [2024-06-28 04:20:53,774 INFO L125 PetriNetUnfolderBase]: For 126203/126206 co-relation queries the response was YES. [2024-06-28 04:20:53,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55076 conditions, 10668 events. 7616/10668 cut-off events. For 126203/126206 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 56666 event pairs, 2362 based on Foata normal form. 32/10695 useless extension candidates. Maximal degree in co-relation 55032. Up to 9642 conditions per place. [2024-06-28 04:20:53,849 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 175 selfloop transitions, 48 changer transitions 0/229 dead transitions. [2024-06-28 04:20:53,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 229 transitions, 2279 flow [2024-06-28 04:20:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:20:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:20:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-28 04:20:53,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-28 04:20:53,851 INFO L175 Difference]: Start difference. First operand has 108 places, 144 transitions, 1389 flow. Second operand 9 states and 231 transitions. [2024-06-28 04:20:53,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 229 transitions, 2279 flow [2024-06-28 04:20:53,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 229 transitions, 2111 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 04:20:53,934 INFO L231 Difference]: Finished difference. Result has 113 places, 153 transitions, 1471 flow [2024-06-28 04:20:53,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1471, PETRI_PLACES=113, PETRI_TRANSITIONS=153} [2024-06-28 04:20:53,935 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-28 04:20:53,935 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 153 transitions, 1471 flow [2024-06-28 04:20:53,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:53,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:53,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:53,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:20:53,936 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:53,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 609417163, now seen corresponding path program 2 times [2024-06-28 04:20:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87449854] [2024-06-28 04:20:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:53,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:57,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:57,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87449854] [2024-06-28 04:20:57,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87449854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:57,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:57,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:20:57,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055694853] [2024-06-28 04:20:57,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:57,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:20:57,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:57,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:20:57,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:20:57,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:57,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 153 transitions, 1471 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:57,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:57,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:57,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:00,180 INFO L124 PetriNetUnfolderBase]: 7518/10530 cut-off events. [2024-06-28 04:21:00,180 INFO L125 PetriNetUnfolderBase]: For 138378/138381 co-relation queries the response was YES. [2024-06-28 04:21:00,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55589 conditions, 10530 events. 7518/10530 cut-off events. For 138378/138381 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 55839 event pairs, 2842 based on Foata normal form. 42/10567 useless extension candidates. Maximal degree in co-relation 55543. Up to 9898 conditions per place. [2024-06-28 04:21:00,264 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 167 selfloop transitions, 42 changer transitions 0/215 dead transitions. [2024-06-28 04:21:00,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 215 transitions, 2104 flow [2024-06-28 04:21:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 04:21:00,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-28 04:21:00,267 INFO L175 Difference]: Start difference. First operand has 113 places, 153 transitions, 1471 flow. Second operand 8 states and 202 transitions. [2024-06-28 04:21:00,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 215 transitions, 2104 flow [2024-06-28 04:21:00,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 215 transitions, 1988 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:00,411 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1475 flow [2024-06-28 04:21:00,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1475, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-28 04:21:00,412 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-28 04:21:00,412 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1475 flow [2024-06-28 04:21:00,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:00,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:00,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:00,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:21:00,413 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:00,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 830535715, now seen corresponding path program 3 times [2024-06-28 04:21:00,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:00,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511145225] [2024-06-28 04:21:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:03,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511145225] [2024-06-28 04:21:03,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511145225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:03,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:03,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229244690] [2024-06-28 04:21:03,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:03,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:03,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1475 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:03,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:03,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:03,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:06,724 INFO L124 PetriNetUnfolderBase]: 7674/10778 cut-off events. [2024-06-28 04:21:06,724 INFO L125 PetriNetUnfolderBase]: For 146183/146183 co-relation queries the response was YES. [2024-06-28 04:21:06,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56997 conditions, 10778 events. 7674/10778 cut-off events. For 146183/146183 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 57733 event pairs, 2884 based on Foata normal form. 24/10795 useless extension candidates. Maximal degree in co-relation 56949. Up to 10137 conditions per place. [2024-06-28 04:21:06,799 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 149 selfloop transitions, 59 changer transitions 0/214 dead transitions. [2024-06-28 04:21:06,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 214 transitions, 2125 flow [2024-06-28 04:21:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:06,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 04:21:06,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-28 04:21:06,801 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1475 flow. Second operand 8 states and 197 transitions. [2024-06-28 04:21:06,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 214 transitions, 2125 flow [2024-06-28 04:21:06,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 214 transitions, 2044 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:06,911 INFO L231 Difference]: Finished difference. Result has 118 places, 156 transitions, 1574 flow [2024-06-28 04:21:06,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1574, PETRI_PLACES=118, PETRI_TRANSITIONS=156} [2024-06-28 04:21:06,912 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-28 04:21:06,912 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 156 transitions, 1574 flow [2024-06-28 04:21:06,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:06,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:06,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:06,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:21:06,912 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:06,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 724892783, now seen corresponding path program 1 times [2024-06-28 04:21:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:06,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618205223] [2024-06-28 04:21:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:06,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:10,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:10,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618205223] [2024-06-28 04:21:10,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618205223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:10,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:10,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:10,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920693832] [2024-06-28 04:21:10,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:10,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:10,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:10,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:10,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:10,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:10,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 156 transitions, 1574 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:10,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:10,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:10,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:12,913 INFO L124 PetriNetUnfolderBase]: 7786/10970 cut-off events. [2024-06-28 04:21:12,913 INFO L125 PetriNetUnfolderBase]: For 163777/163777 co-relation queries the response was YES. [2024-06-28 04:21:12,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59373 conditions, 10970 events. 7786/10970 cut-off events. For 163777/163777 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 59317 event pairs, 2868 based on Foata normal form. 18/10981 useless extension candidates. Maximal degree in co-relation 59324. Up to 9823 conditions per place. [2024-06-28 04:21:12,998 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 146 selfloop transitions, 68 changer transitions 0/220 dead transitions. [2024-06-28 04:21:12,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 220 transitions, 2269 flow [2024-06-28 04:21:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 04:21:13,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-28 04:21:13,000 INFO L175 Difference]: Start difference. First operand has 118 places, 156 transitions, 1574 flow. Second operand 8 states and 199 transitions. [2024-06-28 04:21:13,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 220 transitions, 2269 flow [2024-06-28 04:21:13,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 220 transitions, 2127 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:13,154 INFO L231 Difference]: Finished difference. Result has 121 places, 159 transitions, 1675 flow [2024-06-28 04:21:13,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1675, PETRI_PLACES=121, PETRI_TRANSITIONS=159} [2024-06-28 04:21:13,155 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-28 04:21:13,155 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 159 transitions, 1675 flow [2024-06-28 04:21:13,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:13,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:13,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:13,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:21:13,156 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:13,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -691983067, now seen corresponding path program 4 times [2024-06-28 04:21:13,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:13,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768888914] [2024-06-28 04:21:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:13,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:16,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:16,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768888914] [2024-06-28 04:21:16,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768888914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:16,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:16,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212219109] [2024-06-28 04:21:16,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:16,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:16,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:16,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 159 transitions, 1675 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:16,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:16,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:16,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:19,279 INFO L124 PetriNetUnfolderBase]: 7883/11124 cut-off events. [2024-06-28 04:21:19,280 INFO L125 PetriNetUnfolderBase]: For 182594/182600 co-relation queries the response was YES. [2024-06-28 04:21:19,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61533 conditions, 11124 events. 7883/11124 cut-off events. For 182594/182600 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 60226 event pairs, 2944 based on Foata normal form. 25/11135 useless extension candidates. Maximal degree in co-relation 61482. Up to 10460 conditions per place. [2024-06-28 04:21:19,362 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 155 selfloop transitions, 56 changer transitions 0/217 dead transitions. [2024-06-28 04:21:19,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 217 transitions, 2339 flow [2024-06-28 04:21:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-28 04:21:19,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-28 04:21:19,365 INFO L175 Difference]: Start difference. First operand has 121 places, 159 transitions, 1675 flow. Second operand 8 states and 193 transitions. [2024-06-28 04:21:19,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 217 transitions, 2339 flow [2024-06-28 04:21:19,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 217 transitions, 2191 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:19,515 INFO L231 Difference]: Finished difference. Result has 124 places, 161 transitions, 1709 flow [2024-06-28 04:21:19,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=124, PETRI_TRANSITIONS=161} [2024-06-28 04:21:19,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-28 04:21:19,516 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 161 transitions, 1709 flow [2024-06-28 04:21:19,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:19,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:19,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:19,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:21:19,517 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:19,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash -622507187, now seen corresponding path program 2 times [2024-06-28 04:21:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588565181] [2024-06-28 04:21:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:19,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:22,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:22,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588565181] [2024-06-28 04:21:22,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588565181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:22,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:22,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407511108] [2024-06-28 04:21:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:22,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:22,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:22,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:22,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 161 transitions, 1709 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:22,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:22,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:22,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:25,339 INFO L124 PetriNetUnfolderBase]: 7995/11316 cut-off events. [2024-06-28 04:21:25,340 INFO L125 PetriNetUnfolderBase]: For 200924/200930 co-relation queries the response was YES. [2024-06-28 04:21:25,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63471 conditions, 11316 events. 7995/11316 cut-off events. For 200924/200930 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 61637 event pairs, 2944 based on Foata normal form. 19/11321 useless extension candidates. Maximal degree in co-relation 63419. Up to 10442 conditions per place. [2024-06-28 04:21:25,422 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 158 selfloop transitions, 59 changer transitions 0/223 dead transitions. [2024-06-28 04:21:25,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 223 transitions, 2405 flow [2024-06-28 04:21:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-28 04:21:25,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-28 04:21:25,425 INFO L175 Difference]: Start difference. First operand has 124 places, 161 transitions, 1709 flow. Second operand 8 states and 196 transitions. [2024-06-28 04:21:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 223 transitions, 2405 flow [2024-06-28 04:21:25,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 223 transitions, 2261 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:25,604 INFO L231 Difference]: Finished difference. Result has 126 places, 163 transitions, 1756 flow [2024-06-28 04:21:25,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1756, PETRI_PLACES=126, PETRI_TRANSITIONS=163} [2024-06-28 04:21:25,605 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-28 04:21:25,605 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 163 transitions, 1756 flow [2024-06-28 04:21:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:25,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:25,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:21:25,605 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:25,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash -319449323, now seen corresponding path program 3 times [2024-06-28 04:21:25,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:25,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714510886] [2024-06-28 04:21:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:25,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:28,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:28,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714510886] [2024-06-28 04:21:28,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714510886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:28,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:28,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:28,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041540048] [2024-06-28 04:21:28,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:28,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:28,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:28,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 163 transitions, 1756 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:28,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:28,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:28,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:31,627 INFO L124 PetriNetUnfolderBase]: 7956/11259 cut-off events. [2024-06-28 04:21:31,627 INFO L125 PetriNetUnfolderBase]: For 212265/212271 co-relation queries the response was YES. [2024-06-28 04:21:31,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63591 conditions, 11259 events. 7956/11259 cut-off events. For 212265/212271 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 61239 event pairs, 2577 based on Foata normal form. 19/11264 useless extension candidates. Maximal degree in co-relation 63538. Up to 9477 conditions per place. [2024-06-28 04:21:31,714 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 140 selfloop transitions, 77 changer transitions 0/223 dead transitions. [2024-06-28 04:21:31,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 223 transitions, 2404 flow [2024-06-28 04:21:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 04:21:31,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-28 04:21:31,716 INFO L175 Difference]: Start difference. First operand has 126 places, 163 transitions, 1756 flow. Second operand 8 states and 195 transitions. [2024-06-28 04:21:31,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 223 transitions, 2404 flow [2024-06-28 04:21:31,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 223 transitions, 2243 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:31,903 INFO L231 Difference]: Finished difference. Result has 127 places, 164 transitions, 1782 flow [2024-06-28 04:21:31,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1782, PETRI_PLACES=127, PETRI_TRANSITIONS=164} [2024-06-28 04:21:31,904 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-28 04:21:31,904 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 164 transitions, 1782 flow [2024-06-28 04:21:31,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:31,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:31,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:31,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:21:31,905 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:31,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1642169295, now seen corresponding path program 1 times [2024-06-28 04:21:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437015975] [2024-06-28 04:21:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:33,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437015975] [2024-06-28 04:21:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437015975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:33,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:33,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:21:33,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677824541] [2024-06-28 04:21:33,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:33,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:21:33,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:33,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:21:33,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:21:33,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:21:33,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 164 transitions, 1782 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:33,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:33,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:21:33,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:36,147 INFO L124 PetriNetUnfolderBase]: 7509/10783 cut-off events. [2024-06-28 04:21:36,147 INFO L125 PetriNetUnfolderBase]: For 215150/215153 co-relation queries the response was YES. [2024-06-28 04:21:36,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61190 conditions, 10783 events. 7509/10783 cut-off events. For 215150/215153 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 60456 event pairs, 2945 based on Foata normal form. 10/10751 useless extension candidates. Maximal degree in co-relation 61136. Up to 10248 conditions per place. [2024-06-28 04:21:36,248 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 156 selfloop transitions, 18 changer transitions 0/197 dead transitions. [2024-06-28 04:21:36,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 197 transitions, 2350 flow [2024-06-28 04:21:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:21:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:21:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-28 04:21:36,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-28 04:21:36,250 INFO L175 Difference]: Start difference. First operand has 127 places, 164 transitions, 1782 flow. Second operand 5 states and 125 transitions. [2024-06-28 04:21:36,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 197 transitions, 2350 flow [2024-06-28 04:21:36,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 197 transitions, 2149 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:36,459 INFO L231 Difference]: Finished difference. Result has 127 places, 174 transitions, 1743 flow [2024-06-28 04:21:36,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1743, PETRI_PLACES=127, PETRI_TRANSITIONS=174} [2024-06-28 04:21:36,460 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-28 04:21:36,460 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 174 transitions, 1743 flow [2024-06-28 04:21:36,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:36,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:36,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:21:36,460 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:36,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1707372255, now seen corresponding path program 1 times [2024-06-28 04:21:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:36,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698831685] [2024-06-28 04:21:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:38,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:38,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698831685] [2024-06-28 04:21:38,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698831685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:38,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:38,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:21:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244216920] [2024-06-28 04:21:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:38,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:21:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:21:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:21:38,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:38,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 174 transitions, 1743 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-28 04:21:38,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:38,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:38,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:41,136 INFO L124 PetriNetUnfolderBase]: 8001/11327 cut-off events. [2024-06-28 04:21:41,137 INFO L125 PetriNetUnfolderBase]: For 240398/240404 co-relation queries the response was YES. [2024-06-28 04:21:41,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66794 conditions, 11327 events. 8001/11327 cut-off events. For 240398/240404 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 61735 event pairs, 2954 based on Foata normal form. 6/11327 useless extension candidates. Maximal degree in co-relation 66738. Up to 11060 conditions per place. [2024-06-28 04:21:41,221 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 182 selfloop transitions, 22 changer transitions 0/210 dead transitions. [2024-06-28 04:21:41,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 210 transitions, 2465 flow [2024-06-28 04:21:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 04:21:41,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-28 04:21:41,223 INFO L175 Difference]: Start difference. First operand has 127 places, 174 transitions, 1743 flow. Second operand 6 states and 139 transitions. [2024-06-28 04:21:41,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 210 transitions, 2465 flow [2024-06-28 04:21:41,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 210 transitions, 2415 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-28 04:21:41,431 INFO L231 Difference]: Finished difference. Result has 132 places, 182 transitions, 1902 flow [2024-06-28 04:21:41,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1902, PETRI_PLACES=132, PETRI_TRANSITIONS=182} [2024-06-28 04:21:41,432 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-28 04:21:41,432 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 182 transitions, 1902 flow [2024-06-28 04:21:41,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-28 04:21:41,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:41,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:41,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:21:41,433 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:41,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:41,433 INFO L85 PathProgramCache]: Analyzing trace with hash 26314561, now seen corresponding path program 2 times [2024-06-28 04:21:41,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:41,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490759613] [2024-06-28 04:21:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:41,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:43,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:43,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490759613] [2024-06-28 04:21:43,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490759613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:43,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:43,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:21:43,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703917299] [2024-06-28 04:21:43,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:43,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:21:43,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:43,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:21:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:21:43,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:43,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 182 transitions, 1902 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-28 04:21:43,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:43,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:45,839 INFO L124 PetriNetUnfolderBase]: 7994/11318 cut-off events. [2024-06-28 04:21:45,840 INFO L125 PetriNetUnfolderBase]: For 263119/263125 co-relation queries the response was YES. [2024-06-28 04:21:45,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68940 conditions, 11318 events. 7994/11318 cut-off events. For 263119/263125 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 61838 event pairs, 2954 based on Foata normal form. 6/11318 useless extension candidates. Maximal degree in co-relation 68881. Up to 11064 conditions per place. [2024-06-28 04:21:45,935 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 179 selfloop transitions, 18 changer transitions 0/203 dead transitions. [2024-06-28 04:21:45,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 203 transitions, 2356 flow [2024-06-28 04:21:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:21:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:21:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 04:21:45,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-28 04:21:45,937 INFO L175 Difference]: Start difference. First operand has 132 places, 182 transitions, 1902 flow. Second operand 5 states and 118 transitions. [2024-06-28 04:21:45,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 203 transitions, 2356 flow [2024-06-28 04:21:46,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 203 transitions, 2227 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-28 04:21:46,241 INFO L231 Difference]: Finished difference. Result has 135 places, 182 transitions, 1823 flow [2024-06-28 04:21:46,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1823, PETRI_PLACES=135, PETRI_TRANSITIONS=182} [2024-06-28 04:21:46,242 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-28 04:21:46,242 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 182 transitions, 1823 flow [2024-06-28 04:21:46,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-28 04:21:46,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:46,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:21:46,243 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:46,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1658710374, now seen corresponding path program 1 times [2024-06-28 04:21:46,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:46,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778315115] [2024-06-28 04:21:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:49,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:49,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778315115] [2024-06-28 04:21:49,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778315115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:49,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:49,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:49,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642484493] [2024-06-28 04:21:49,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:49,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:49,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:49,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:49,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:21:49,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 182 transitions, 1823 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:49,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:49,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:21:49,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:52,129 INFO L124 PetriNetUnfolderBase]: 8051/11525 cut-off events. [2024-06-28 04:21:52,130 INFO L125 PetriNetUnfolderBase]: For 289021/289061 co-relation queries the response was YES. [2024-06-28 04:21:52,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70447 conditions, 11525 events. 8051/11525 cut-off events. For 289021/289061 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 64566 event pairs, 2900 based on Foata normal form. 20/11483 useless extension candidates. Maximal degree in co-relation 70386. Up to 10570 conditions per place. [2024-06-28 04:21:52,237 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 183 selfloop transitions, 52 changer transitions 0/258 dead transitions. [2024-06-28 04:21:52,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 258 transitions, 2861 flow [2024-06-28 04:21:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:21:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:21:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-28 04:21:52,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 04:21:52,239 INFO L175 Difference]: Start difference. First operand has 135 places, 182 transitions, 1823 flow. Second operand 9 states and 216 transitions. [2024-06-28 04:21:52,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 258 transitions, 2861 flow [2024-06-28 04:21:52,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 258 transitions, 2825 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:52,526 INFO L231 Difference]: Finished difference. Result has 142 places, 204 transitions, 2157 flow [2024-06-28 04:21:52,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2157, PETRI_PLACES=142, PETRI_TRANSITIONS=204} [2024-06-28 04:21:52,527 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-28 04:21:52,527 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 204 transitions, 2157 flow [2024-06-28 04:21:52,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:52,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:52,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:52,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:21:52,528 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:52,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash 815954700, now seen corresponding path program 2 times [2024-06-28 04:21:52,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:52,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485362592] [2024-06-28 04:21:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:52,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:55,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:55,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485362592] [2024-06-28 04:21:55,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485362592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:55,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:21:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610313177] [2024-06-28 04:21:55,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:55,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:21:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:21:55,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:21:55,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:21:55,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 204 transitions, 2157 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:55,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:55,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:21:55,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:58,169 INFO L124 PetriNetUnfolderBase]: 8220/11762 cut-off events. [2024-06-28 04:21:58,169 INFO L125 PetriNetUnfolderBase]: For 316465/316551 co-relation queries the response was YES. [2024-06-28 04:21:58,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75907 conditions, 11762 events. 8220/11762 cut-off events. For 316465/316551 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 66076 event pairs, 2913 based on Foata normal form. 28/11716 useless extension candidates. Maximal degree in co-relation 75843. Up to 10452 conditions per place. [2024-06-28 04:21:58,281 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 173 selfloop transitions, 62 changer transitions 0/258 dead transitions. [2024-06-28 04:21:58,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 258 transitions, 3153 flow [2024-06-28 04:21:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:21:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:21:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 04:21:58,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-28 04:21:58,282 INFO L175 Difference]: Start difference. First operand has 142 places, 204 transitions, 2157 flow. Second operand 6 states and 152 transitions. [2024-06-28 04:21:58,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 258 transitions, 3153 flow [2024-06-28 04:21:58,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 258 transitions, 3062 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-28 04:21:58,583 INFO L231 Difference]: Finished difference. Result has 147 places, 223 transitions, 2499 flow [2024-06-28 04:21:58,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2499, PETRI_PLACES=147, PETRI_TRANSITIONS=223} [2024-06-28 04:21:58,583 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-28 04:21:58,583 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 223 transitions, 2499 flow [2024-06-28 04:21:58,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:58,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:58,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:58,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:21:58,584 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:58,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 815568750, now seen corresponding path program 3 times [2024-06-28 04:21:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:58,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77335779] [2024-06-28 04:21:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:58,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:01,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:01,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77335779] [2024-06-28 04:22:01,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77335779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:01,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:01,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:01,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650040529] [2024-06-28 04:22:01,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:01,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:01,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:01,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:22:01,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 223 transitions, 2499 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:01,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:01,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:22:01,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:04,290 INFO L124 PetriNetUnfolderBase]: 8183/11707 cut-off events. [2024-06-28 04:22:04,290 INFO L125 PetriNetUnfolderBase]: For 347001/347095 co-relation queries the response was YES. [2024-06-28 04:22:04,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78939 conditions, 11707 events. 8183/11707 cut-off events. For 347001/347095 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65584 event pairs, 2898 based on Foata normal form. 20/11657 useless extension candidates. Maximal degree in co-relation 78872. Up to 10730 conditions per place. [2024-06-28 04:22:04,392 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 186 selfloop transitions, 53 changer transitions 0/262 dead transitions. [2024-06-28 04:22:04,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 262 transitions, 3162 flow [2024-06-28 04:22:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 04:22:04,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-28 04:22:04,393 INFO L175 Difference]: Start difference. First operand has 147 places, 223 transitions, 2499 flow. Second operand 7 states and 170 transitions. [2024-06-28 04:22:04,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 262 transitions, 3162 flow [2024-06-28 04:22:04,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 262 transitions, 3080 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-28 04:22:04,695 INFO L231 Difference]: Finished difference. Result has 154 places, 224 transitions, 2586 flow [2024-06-28 04:22:04,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2586, PETRI_PLACES=154, PETRI_TRANSITIONS=224} [2024-06-28 04:22:04,696 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-28 04:22:04,696 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 224 transitions, 2586 flow [2024-06-28 04:22:04,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:04,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:04,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:04,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:22:04,696 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:04,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:04,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1723930832, now seen corresponding path program 1 times [2024-06-28 04:22:04,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:04,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301480993] [2024-06-28 04:22:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:04,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:07,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:07,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301480993] [2024-06-28 04:22:07,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301480993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:07,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:07,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:07,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858602406] [2024-06-28 04:22:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:07,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:07,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:07,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:22:07,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 224 transitions, 2586 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:07,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:07,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:22:07,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:10,326 INFO L124 PetriNetUnfolderBase]: 8936/12577 cut-off events. [2024-06-28 04:22:10,326 INFO L125 PetriNetUnfolderBase]: For 352825/352825 co-relation queries the response was YES. [2024-06-28 04:22:10,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83413 conditions, 12577 events. 8936/12577 cut-off events. For 352825/352825 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68279 event pairs, 3003 based on Foata normal form. 8/12577 useless extension candidates. Maximal degree in co-relation 83342. Up to 11968 conditions per place. [2024-06-28 04:22:10,444 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 241 selfloop transitions, 38 changer transitions 0/285 dead transitions. [2024-06-28 04:22:10,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 285 transitions, 3768 flow [2024-06-28 04:22:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 04:22:10,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-28 04:22:10,446 INFO L175 Difference]: Start difference. First operand has 154 places, 224 transitions, 2586 flow. Second operand 7 states and 175 transitions. [2024-06-28 04:22:10,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 285 transitions, 3768 flow [2024-06-28 04:22:10,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 285 transitions, 3654 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 04:22:10,869 INFO L231 Difference]: Finished difference. Result has 159 places, 239 transitions, 2800 flow [2024-06-28 04:22:10,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2800, PETRI_PLACES=159, PETRI_TRANSITIONS=239} [2024-06-28 04:22:10,869 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-28 04:22:10,870 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 239 transitions, 2800 flow [2024-06-28 04:22:10,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:10,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:10,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:10,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:22:10,870 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:10,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash 815753262, now seen corresponding path program 2 times [2024-06-28 04:22:10,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:10,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708890158] [2024-06-28 04:22:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:10,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:13,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:13,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708890158] [2024-06-28 04:22:13,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708890158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:13,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:13,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:13,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418878716] [2024-06-28 04:22:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:13,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:13,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:22:13,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 239 transitions, 2800 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:13,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:13,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:22:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:16,318 INFO L124 PetriNetUnfolderBase]: 9014/12691 cut-off events. [2024-06-28 04:22:16,318 INFO L125 PetriNetUnfolderBase]: For 385328/385328 co-relation queries the response was YES. [2024-06-28 04:22:16,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87148 conditions, 12691 events. 9014/12691 cut-off events. For 385328/385328 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 68923 event pairs, 3012 based on Foata normal form. 8/12691 useless extension candidates. Maximal degree in co-relation 87074. Up to 12128 conditions per place. [2024-06-28 04:22:16,435 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 244 selfloop transitions, 32 changer transitions 0/282 dead transitions. [2024-06-28 04:22:16,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 282 transitions, 3808 flow [2024-06-28 04:22:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:22:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:22:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-28 04:22:16,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-28 04:22:16,437 INFO L175 Difference]: Start difference. First operand has 159 places, 239 transitions, 2800 flow. Second operand 6 states and 151 transitions. [2024-06-28 04:22:16,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 282 transitions, 3808 flow [2024-06-28 04:22:16,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 282 transitions, 3688 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-28 04:22:16,768 INFO L231 Difference]: Finished difference. Result has 164 places, 245 transitions, 2890 flow [2024-06-28 04:22:16,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2890, PETRI_PLACES=164, PETRI_TRANSITIONS=245} [2024-06-28 04:22:16,768 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-28 04:22:16,769 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 245 transitions, 2890 flow [2024-06-28 04:22:16,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:16,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:16,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:16,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:22:16,769 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:16,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash -726526822, now seen corresponding path program 3 times [2024-06-28 04:22:16,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:16,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062198949] [2024-06-28 04:22:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:16,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:19,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062198949] [2024-06-28 04:22:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062198949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:19,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:19,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:19,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582377991] [2024-06-28 04:22:19,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:19,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:19,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:19,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:22:19,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 245 transitions, 2890 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:19,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:19,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:22:19,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:22,569 INFO L124 PetriNetUnfolderBase]: 9040/12736 cut-off events. [2024-06-28 04:22:22,570 INFO L125 PetriNetUnfolderBase]: For 407716/407719 co-relation queries the response was YES. [2024-06-28 04:22:22,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88600 conditions, 12736 events. 9040/12736 cut-off events. For 407716/407719 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 69249 event pairs, 2984 based on Foata normal form. 10/12740 useless extension candidates. Maximal degree in co-relation 88523. Up to 12154 conditions per place. [2024-06-28 04:22:22,722 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 253 selfloop transitions, 40 changer transitions 0/299 dead transitions. [2024-06-28 04:22:22,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 299 transitions, 3856 flow [2024-06-28 04:22:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 04:22:22,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-28 04:22:22,724 INFO L175 Difference]: Start difference. First operand has 164 places, 245 transitions, 2890 flow. Second operand 8 states and 194 transitions. [2024-06-28 04:22:22,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 299 transitions, 3856 flow [2024-06-28 04:22:23,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 299 transitions, 3718 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 04:22:23,300 INFO L231 Difference]: Finished difference. Result has 168 places, 250 transitions, 2948 flow [2024-06-28 04:22:23,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2948, PETRI_PLACES=168, PETRI_TRANSITIONS=250} [2024-06-28 04:22:23,300 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-28 04:22:23,300 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 250 transitions, 2948 flow [2024-06-28 04:22:23,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:23,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:23,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:23,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:22:23,301 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:23,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:23,301 INFO L85 PathProgramCache]: Analyzing trace with hash 815968588, now seen corresponding path program 1 times [2024-06-28 04:22:23,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:23,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759474072] [2024-06-28 04:22:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:23,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:27,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:27,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759474072] [2024-06-28 04:22:27,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759474072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:27,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:27,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:27,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067648761] [2024-06-28 04:22:27,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:27,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:27,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:27,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:22:27,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 250 transitions, 2948 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:27,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:27,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:22:27,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:30,623 INFO L124 PetriNetUnfolderBase]: 8454/12134 cut-off events. [2024-06-28 04:22:30,623 INFO L125 PetriNetUnfolderBase]: For 422950/423037 co-relation queries the response was YES. [2024-06-28 04:22:30,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85126 conditions, 12134 events. 8454/12134 cut-off events. For 422950/423037 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 68340 event pairs, 2937 based on Foata normal form. 18/12106 useless extension candidates. Maximal degree in co-relation 85048. Up to 11385 conditions per place. [2024-06-28 04:22:30,766 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 243 selfloop transitions, 21 changer transitions 0/287 dead transitions. [2024-06-28 04:22:30,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 287 transitions, 3744 flow [2024-06-28 04:22:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:22:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:22:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 04:22:30,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-28 04:22:30,768 INFO L175 Difference]: Start difference. First operand has 168 places, 250 transitions, 2948 flow. Second operand 6 states and 150 transitions. [2024-06-28 04:22:30,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 287 transitions, 3744 flow [2024-06-28 04:22:31,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 287 transitions, 3588 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:31,296 INFO L231 Difference]: Finished difference. Result has 168 places, 253 transitions, 2927 flow [2024-06-28 04:22:31,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2927, PETRI_PLACES=168, PETRI_TRANSITIONS=253} [2024-06-28 04:22:31,297 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-28 04:22:31,297 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 253 transitions, 2927 flow [2024-06-28 04:22:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:31,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:31,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:31,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:22:31,298 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:31,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:31,298 INFO L85 PathProgramCache]: Analyzing trace with hash 695651902, now seen corresponding path program 1 times [2024-06-28 04:22:31,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:31,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429330381] [2024-06-28 04:22:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:31,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:34,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:34,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429330381] [2024-06-28 04:22:34,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429330381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:34,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:34,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:34,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193676583] [2024-06-28 04:22:34,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:34,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:34,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:34,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:22:34,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 253 transitions, 2927 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:34,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:34,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:22:34,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:37,653 INFO L124 PetriNetUnfolderBase]: 9169/12908 cut-off events. [2024-06-28 04:22:37,653 INFO L125 PetriNetUnfolderBase]: For 477740/477755 co-relation queries the response was YES. [2024-06-28 04:22:37,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91623 conditions, 12908 events. 9169/12908 cut-off events. For 477740/477755 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70535 event pairs, 3070 based on Foata normal form. 12/12910 useless extension candidates. Maximal degree in co-relation 91544. Up to 12336 conditions per place. [2024-06-28 04:22:37,774 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 233 selfloop transitions, 70 changer transitions 0/309 dead transitions. [2024-06-28 04:22:37,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 309 transitions, 4215 flow [2024-06-28 04:22:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 04:22:37,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-28 04:22:37,776 INFO L175 Difference]: Start difference. First operand has 168 places, 253 transitions, 2927 flow. Second operand 7 states and 171 transitions. [2024-06-28 04:22:37,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 309 transitions, 4215 flow [2024-06-28 04:22:38,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 309 transitions, 4116 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-28 04:22:38,273 INFO L231 Difference]: Finished difference. Result has 171 places, 265 transitions, 3294 flow [2024-06-28 04:22:38,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3294, PETRI_PLACES=171, PETRI_TRANSITIONS=265} [2024-06-28 04:22:38,274 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-28 04:22:38,274 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 265 transitions, 3294 flow [2024-06-28 04:22:38,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:38,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:38,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:38,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:22:38,275 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:38,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash 700413502, now seen corresponding path program 2 times [2024-06-28 04:22:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:38,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453909812] [2024-06-28 04:22:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:38,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:41,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:41,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453909812] [2024-06-28 04:22:41,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453909812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:41,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:41,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:41,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730456509] [2024-06-28 04:22:41,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:41,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:41,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:41,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:41,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:22:41,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 265 transitions, 3294 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:41,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:41,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:22:41,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:44,699 INFO L124 PetriNetUnfolderBase]: 9207/12977 cut-off events. [2024-06-28 04:22:44,699 INFO L125 PetriNetUnfolderBase]: For 511994/511997 co-relation queries the response was YES. [2024-06-28 04:22:44,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94164 conditions, 12977 events. 9207/12977 cut-off events. For 511994/511997 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 71194 event pairs, 3069 based on Foata normal form. 4/12976 useless extension candidates. Maximal degree in co-relation 94084. Up to 12495 conditions per place. [2024-06-28 04:22:44,821 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 260 selfloop transitions, 45 changer transitions 0/311 dead transitions. [2024-06-28 04:22:44,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 311 transitions, 4169 flow [2024-06-28 04:22:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 04:22:44,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-28 04:22:44,823 INFO L175 Difference]: Start difference. First operand has 171 places, 265 transitions, 3294 flow. Second operand 7 states and 163 transitions. [2024-06-28 04:22:44,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 311 transitions, 4169 flow [2024-06-28 04:22:45,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 311 transitions, 3997 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-28 04:22:45,414 INFO L231 Difference]: Finished difference. Result has 176 places, 273 transitions, 3384 flow [2024-06-28 04:22:45,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3384, PETRI_PLACES=176, PETRI_TRANSITIONS=273} [2024-06-28 04:22:45,414 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-28 04:22:45,414 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 273 transitions, 3384 flow [2024-06-28 04:22:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:45,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:45,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:45,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:22:45,415 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:45,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:45,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1891761726, now seen corresponding path program 3 times [2024-06-28 04:22:45,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:45,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553951516] [2024-06-28 04:22:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:45,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553951516] [2024-06-28 04:22:48,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553951516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:48,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:48,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:48,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066102636] [2024-06-28 04:22:48,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:48,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:22:48,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 273 transitions, 3384 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:48,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:48,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:22:48,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:51,762 INFO L124 PetriNetUnfolderBase]: 9226/12995 cut-off events. [2024-06-28 04:22:51,762 INFO L125 PetriNetUnfolderBase]: For 533557/533591 co-relation queries the response was YES. [2024-06-28 04:22:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94505 conditions, 12995 events. 9226/12995 cut-off events. For 533557/533591 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 71073 event pairs, 3071 based on Foata normal form. 21/13001 useless extension candidates. Maximal degree in co-relation 94423. Up to 12401 conditions per place. [2024-06-28 04:22:51,925 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 238 selfloop transitions, 75 changer transitions 0/319 dead transitions. [2024-06-28 04:22:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 319 transitions, 4500 flow [2024-06-28 04:22:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 04:22:51,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-28 04:22:51,927 INFO L175 Difference]: Start difference. First operand has 176 places, 273 transitions, 3384 flow. Second operand 7 states and 167 transitions. [2024-06-28 04:22:51,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 319 transitions, 4500 flow [2024-06-28 04:22:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 319 transitions, 4348 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 04:22:52,742 INFO L231 Difference]: Finished difference. Result has 178 places, 277 transitions, 3490 flow [2024-06-28 04:22:52,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3490, PETRI_PLACES=178, PETRI_TRANSITIONS=277} [2024-06-28 04:22:52,743 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-28 04:22:52,743 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 277 transitions, 3490 flow [2024-06-28 04:22:52,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:52,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:52,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:52,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:22:52,743 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:52,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1902237246, now seen corresponding path program 4 times [2024-06-28 04:22:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965144420] [2024-06-28 04:22:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:55,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965144420] [2024-06-28 04:22:55,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965144420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:55,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:55,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:22:55,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692327481] [2024-06-28 04:22:55,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:55,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:22:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:22:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:22:55,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:22:55,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 277 transitions, 3490 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:55,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:55,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:22:55,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:58,898 INFO L124 PetriNetUnfolderBase]: 9245/13020 cut-off events. [2024-06-28 04:22:58,898 INFO L125 PetriNetUnfolderBase]: For 556403/556437 co-relation queries the response was YES. [2024-06-28 04:22:58,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95549 conditions, 13020 events. 9245/13020 cut-off events. For 556403/556437 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 71252 event pairs, 3071 based on Foata normal form. 21/13026 useless extension candidates. Maximal degree in co-relation 95466. Up to 12421 conditions per place. [2024-06-28 04:22:59,041 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 228 selfloop transitions, 82 changer transitions 0/316 dead transitions. [2024-06-28 04:22:59,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 316 transitions, 4456 flow [2024-06-28 04:22:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-28 04:22:59,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-28 04:22:59,043 INFO L175 Difference]: Start difference. First operand has 178 places, 277 transitions, 3490 flow. Second operand 7 states and 161 transitions. [2024-06-28 04:22:59,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 316 transitions, 4456 flow [2024-06-28 04:22:59,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 316 transitions, 4160 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:59,639 INFO L231 Difference]: Finished difference. Result has 179 places, 281 transitions, 3473 flow [2024-06-28 04:22:59,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3473, PETRI_PLACES=179, PETRI_TRANSITIONS=281} [2024-06-28 04:22:59,640 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-28 04:22:59,640 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 281 transitions, 3473 flow [2024-06-28 04:22:59,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:59,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:59,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:22:59,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:22:59,640 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:22:59,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash -487177568, now seen corresponding path program 5 times [2024-06-28 04:22:59,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:59,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67951138] [2024-06-28 04:22:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:02,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:02,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67951138] [2024-06-28 04:23:02,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67951138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:02,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:02,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:23:02,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160299716] [2024-06-28 04:23:02,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:02,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:23:02,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:23:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:23:02,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:02,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 281 transitions, 3473 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) [2024-06-28 04:23:02,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:02,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:02,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:06,664 INFO L124 PetriNetUnfolderBase]: 9238/13013 cut-off events. [2024-06-28 04:23:06,664 INFO L125 PetriNetUnfolderBase]: For 575829/575835 co-relation queries the response was YES. [2024-06-28 04:23:06,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95805 conditions, 13013 events. 9238/13013 cut-off events. For 575829/575835 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 71291 event pairs, 3086 based on Foata normal form. 3/13002 useless extension candidates. Maximal degree in co-relation 95722. Up to 12490 conditions per place. [2024-06-28 04:23:06,813 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 255 selfloop transitions, 64 changer transitions 0/325 dead transitions. [2024-06-28 04:23:06,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 325 transitions, 4403 flow [2024-06-28 04:23:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:23:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:23:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-28 04:23:06,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40576923076923077 [2024-06-28 04:23:06,818 INFO L175 Difference]: Start difference. First operand has 179 places, 281 transitions, 3473 flow. Second operand 10 states and 211 transitions. [2024-06-28 04:23:06,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 325 transitions, 4403 flow [2024-06-28 04:23:07,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 325 transitions, 4151 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:07,899 INFO L231 Difference]: Finished difference. Result has 186 places, 283 transitions, 3395 flow [2024-06-28 04:23:07,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3395, PETRI_PLACES=186, PETRI_TRANSITIONS=283} [2024-06-28 04:23:07,900 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-28 04:23:07,900 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 283 transitions, 3395 flow [2024-06-28 04:23:07,900 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) [2024-06-28 04:23:07,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:07,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:07,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:23:07,901 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:07,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:07,902 INFO L85 PathProgramCache]: Analyzing trace with hash 380384112, now seen corresponding path program 6 times [2024-06-28 04:23:07,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:07,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005458647] [2024-06-28 04:23:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:07,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:10,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:10,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005458647] [2024-06-28 04:23:10,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005458647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:10,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:10,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:10,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319708093] [2024-06-28 04:23:10,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:10,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:10,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:10,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:10,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:10,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:10,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 283 transitions, 3395 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:10,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:10,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:10,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:13,514 INFO L124 PetriNetUnfolderBase]: 9231/12995 cut-off events. [2024-06-28 04:23:13,514 INFO L125 PetriNetUnfolderBase]: For 597868/597890 co-relation queries the response was YES. [2024-06-28 04:23:13,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96055 conditions, 12995 events. 9231/12995 cut-off events. For 597868/597890 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 71029 event pairs, 3093 based on Foata normal form. 11/12988 useless extension candidates. Maximal degree in co-relation 95970. Up to 12359 conditions per place. [2024-06-28 04:23:13,653 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 223 selfloop transitions, 87 changer transitions 0/316 dead transitions. [2024-06-28 04:23:13,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 316 transitions, 4121 flow [2024-06-28 04:23:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:23:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:23:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-28 04:23:13,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-28 04:23:13,655 INFO L175 Difference]: Start difference. First operand has 186 places, 283 transitions, 3395 flow. Second operand 6 states and 146 transitions. [2024-06-28 04:23:13,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 316 transitions, 4121 flow [2024-06-28 04:23:14,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 316 transitions, 3796 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-28 04:23:14,254 INFO L231 Difference]: Finished difference. Result has 184 places, 283 transitions, 3262 flow [2024-06-28 04:23:14,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3262, PETRI_PLACES=184, PETRI_TRANSITIONS=283} [2024-06-28 04:23:14,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-28 04:23:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 283 transitions, 3262 flow [2024-06-28 04:23:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:14,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:14,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:23:14,255 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:14,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1899388222, now seen corresponding path program 1 times [2024-06-28 04:23:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:14,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937084233] [2024-06-28 04:23:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:16,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:16,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937084233] [2024-06-28 04:23:16,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937084233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:16,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:16,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687285614] [2024-06-28 04:23:16,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:16,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:16,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:16,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 283 transitions, 3262 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:16,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:16,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:16,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:19,667 INFO L124 PetriNetUnfolderBase]: 9263/13037 cut-off events. [2024-06-28 04:23:19,667 INFO L125 PetriNetUnfolderBase]: For 617757/617760 co-relation queries the response was YES. [2024-06-28 04:23:19,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96817 conditions, 13037 events. 9263/13037 cut-off events. For 617757/617760 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 71319 event pairs, 2916 based on Foata normal form. 6/13037 useless extension candidates. Maximal degree in co-relation 96734. Up to 12606 conditions per place. [2024-06-28 04:23:19,842 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 292 selfloop transitions, 30 changer transitions 0/328 dead transitions. [2024-06-28 04:23:19,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 328 transitions, 4350 flow [2024-06-28 04:23:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 04:23:19,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-28 04:23:19,844 INFO L175 Difference]: Start difference. First operand has 184 places, 283 transitions, 3262 flow. Second operand 7 states and 163 transitions. [2024-06-28 04:23:19,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 328 transitions, 4350 flow [2024-06-28 04:23:20,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 328 transitions, 4159 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:23:20,494 INFO L231 Difference]: Finished difference. Result has 185 places, 289 transitions, 3337 flow [2024-06-28 04:23:20,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3337, PETRI_PLACES=185, PETRI_TRANSITIONS=289} [2024-06-28 04:23:20,495 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-28 04:23:20,495 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 289 transitions, 3337 flow [2024-06-28 04:23:20,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:20,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:20,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:20,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:23:20,495 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:20,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1902245182, now seen corresponding path program 2 times [2024-06-28 04:23:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:20,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907694311] [2024-06-28 04:23:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:20,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:23,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:23,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907694311] [2024-06-28 04:23:23,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907694311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:23,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:23,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:23,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640631305] [2024-06-28 04:23:23,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:23,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:23,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:23,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:23,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:23,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 289 transitions, 3337 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:23,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:23,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:23,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:26,327 INFO L124 PetriNetUnfolderBase]: 9295/13083 cut-off events. [2024-06-28 04:23:26,327 INFO L125 PetriNetUnfolderBase]: For 628314/628317 co-relation queries the response was YES. [2024-06-28 04:23:26,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97820 conditions, 13083 events. 9295/13083 cut-off events. For 628314/628317 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 71645 event pairs, 3066 based on Foata normal form. 6/13083 useless extension candidates. Maximal degree in co-relation 97737. Up to 12728 conditions per place. [2024-06-28 04:23:26,462 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 293 selfloop transitions, 25 changer transitions 0/324 dead transitions. [2024-06-28 04:23:26,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 324 transitions, 4163 flow [2024-06-28 04:23:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:23:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:23:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-28 04:23:26,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:23:26,463 INFO L175 Difference]: Start difference. First operand has 185 places, 289 transitions, 3337 flow. Second operand 7 states and 156 transitions. [2024-06-28 04:23:26,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 324 transitions, 4163 flow [2024-06-28 04:23:27,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 324 transitions, 3991 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-28 04:23:27,144 INFO L231 Difference]: Finished difference. Result has 189 places, 292 transitions, 3329 flow [2024-06-28 04:23:27,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3329, PETRI_PLACES=189, PETRI_TRANSITIONS=292} [2024-06-28 04:23:27,145 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-28 04:23:27,145 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 292 transitions, 3329 flow [2024-06-28 04:23:27,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:27,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:27,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:27,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:23:27,145 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:27,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash -481455712, now seen corresponding path program 3 times [2024-06-28 04:23:27,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:27,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011801441] [2024-06-28 04:23:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:29,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:29,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011801441] [2024-06-28 04:23:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011801441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:29,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:23:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708426936] [2024-06-28 04:23:29,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:29,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:23:29,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:29,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:23:29,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:23:29,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:29,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 292 transitions, 3329 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:29,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:29,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:29,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:32,591 INFO L124 PetriNetUnfolderBase]: 9283/13065 cut-off events. [2024-06-28 04:23:32,591 INFO L125 PetriNetUnfolderBase]: For 648940/648943 co-relation queries the response was YES. [2024-06-28 04:23:32,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97798 conditions, 13065 events. 9283/13065 cut-off events. For 648940/648943 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 71445 event pairs, 2914 based on Foata normal form. 6/13065 useless extension candidates. Maximal degree in co-relation 97713. Up to 12685 conditions per place. [2024-06-28 04:23:32,747 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 293 selfloop transitions, 24 changer transitions 0/323 dead transitions. [2024-06-28 04:23:32,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 323 transitions, 4051 flow [2024-06-28 04:23:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:23:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:23:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 04:23:32,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-28 04:23:32,749 INFO L175 Difference]: Start difference. First operand has 189 places, 292 transitions, 3329 flow. Second operand 6 states and 142 transitions. [2024-06-28 04:23:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 323 transitions, 4051 flow [2024-06-28 04:23:33,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 323 transitions, 3893 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:33,541 INFO L231 Difference]: Finished difference. Result has 190 places, 292 transitions, 3231 flow [2024-06-28 04:23:33,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3231, PETRI_PLACES=190, PETRI_TRANSITIONS=292} [2024-06-28 04:23:33,542 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-28 04:23:33,542 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 292 transitions, 3231 flow [2024-06-28 04:23:33,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:33,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:33,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:33,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:23:33,543 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:33,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1347144339, now seen corresponding path program 1 times [2024-06-28 04:23:33,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:33,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048163208] [2024-06-28 04:23:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:35,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048163208] [2024-06-28 04:23:35,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048163208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:35,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:35,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:23:35,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522259456] [2024-06-28 04:23:35,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:35,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:23:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:35,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:23:35,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:23:35,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-28 04:23:35,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 292 transitions, 3231 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:35,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:35,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-28 04:23:35,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:38,025 INFO L124 PetriNetUnfolderBase]: 8154/11846 cut-off events. [2024-06-28 04:23:38,025 INFO L125 PetriNetUnfolderBase]: For 667539/668072 co-relation queries the response was YES. [2024-06-28 04:23:38,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90699 conditions, 11846 events. 8154/11846 cut-off events. For 667539/668072 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 68863 event pairs, 2801 based on Foata normal form. 11/11675 useless extension candidates. Maximal degree in co-relation 90613. Up to 10838 conditions per place. [2024-06-28 04:23:38,176 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 229 selfloop transitions, 19 changer transitions 0/309 dead transitions. [2024-06-28 04:23:38,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 309 transitions, 3771 flow [2024-06-28 04:23:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:23:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:23:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-28 04:23:38,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-28 04:23:38,178 INFO L175 Difference]: Start difference. First operand has 190 places, 292 transitions, 3231 flow. Second operand 5 states and 122 transitions. [2024-06-28 04:23:38,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 309 transitions, 3771 flow [2024-06-28 04:23:39,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 309 transitions, 3703 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:39,027 INFO L231 Difference]: Finished difference. Result has 190 places, 292 transitions, 3211 flow [2024-06-28 04:23:39,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3211, PETRI_PLACES=190, PETRI_TRANSITIONS=292} [2024-06-28 04:23:39,027 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-28 04:23:39,028 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 292 transitions, 3211 flow [2024-06-28 04:23:39,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:39,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:39,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:39,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:23:39,028 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:39,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash -25185928, now seen corresponding path program 1 times [2024-06-28 04:23:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:39,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359290349] [2024-06-28 04:23:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:39,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:42,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359290349] [2024-06-28 04:23:42,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359290349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:42,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:42,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:23:42,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964371581] [2024-06-28 04:23:42,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:42,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:23:42,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:42,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:23:42,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:23:42,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:42,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 292 transitions, 3211 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:42,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:42,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:42,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:45,879 INFO L124 PetriNetUnfolderBase]: 9307/13118 cut-off events. [2024-06-28 04:23:45,879 INFO L125 PetriNetUnfolderBase]: For 675566/675569 co-relation queries the response was YES. [2024-06-28 04:23:45,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98938 conditions, 13118 events. 9307/13118 cut-off events. For 675566/675569 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 72034 event pairs, 2982 based on Foata normal form. 4/13109 useless extension candidates. Maximal degree in co-relation 98851. Up to 12570 conditions per place. [2024-06-28 04:23:46,034 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 294 selfloop transitions, 65 changer transitions 0/365 dead transitions. [2024-06-28 04:23:46,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 365 transitions, 4419 flow [2024-06-28 04:23:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-28 04:23:46,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-28 04:23:46,037 INFO L175 Difference]: Start difference. First operand has 190 places, 292 transitions, 3211 flow. Second operand 9 states and 204 transitions. [2024-06-28 04:23:46,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 365 transitions, 4419 flow [2024-06-28 04:23:46,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 365 transitions, 4370 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:46,773 INFO L231 Difference]: Finished difference. Result has 197 places, 315 transitions, 3691 flow [2024-06-28 04:23:46,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3691, PETRI_PLACES=197, PETRI_TRANSITIONS=315} [2024-06-28 04:23:46,774 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 142 predicate places. [2024-06-28 04:23:46,775 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 315 transitions, 3691 flow [2024-06-28 04:23:46,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:46,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:46,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:46,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:23:46,775 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:46,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1623216678, now seen corresponding path program 2 times [2024-06-28 04:23:46,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:46,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675076889] [2024-06-28 04:23:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:46,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:50,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:50,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675076889] [2024-06-28 04:23:50,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675076889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:50,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:50,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:23:50,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111537302] [2024-06-28 04:23:50,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:50,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:23:50,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:23:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:23:50,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:50,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 315 transitions, 3691 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:50,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:50,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:50,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:54,428 INFO L124 PetriNetUnfolderBase]: 9378/13206 cut-off events. [2024-06-28 04:23:54,428 INFO L125 PetriNetUnfolderBase]: For 721755/721770 co-relation queries the response was YES. [2024-06-28 04:23:54,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102836 conditions, 13206 events. 9378/13206 cut-off events. For 721755/721770 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 72392 event pairs, 2999 based on Foata normal form. 12/13208 useless extension candidates. Maximal degree in co-relation 102747. Up to 12258 conditions per place. [2024-06-28 04:23:54,568 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 245 selfloop transitions, 135 changer transitions 0/386 dead transitions. [2024-06-28 04:23:54,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 386 transitions, 5559 flow [2024-06-28 04:23:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:23:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:23:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 04:23:54,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-28 04:23:54,569 INFO L175 Difference]: Start difference. First operand has 197 places, 315 transitions, 3691 flow. Second operand 8 states and 199 transitions. [2024-06-28 04:23:54,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 386 transitions, 5559 flow [2024-06-28 04:23:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 386 transitions, 5380 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-28 04:23:55,535 INFO L231 Difference]: Finished difference. Result has 201 places, 331 transitions, 4263 flow [2024-06-28 04:23:55,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3512, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4263, PETRI_PLACES=201, PETRI_TRANSITIONS=331} [2024-06-28 04:23:55,535 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-28 04:23:55,536 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 331 transitions, 4263 flow [2024-06-28 04:23:55,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:55,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:55,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:23:55,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:23:55,536 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:23:55,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash 232477082, now seen corresponding path program 3 times [2024-06-28 04:23:55,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:55,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383174636] [2024-06-28 04:23:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:59,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:59,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383174636] [2024-06-28 04:23:59,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383174636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:59,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:59,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:23:59,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608193634] [2024-06-28 04:23:59,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:59,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:23:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:23:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:23:59,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:23:59,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 331 transitions, 4263 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:59,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:59,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:23:59,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:03,464 INFO L124 PetriNetUnfolderBase]: 9397/13237 cut-off events. [2024-06-28 04:24:03,464 INFO L125 PetriNetUnfolderBase]: For 768200/768215 co-relation queries the response was YES. [2024-06-28 04:24:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105664 conditions, 13237 events. 9397/13237 cut-off events. For 768200/768215 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 72617 event pairs, 2999 based on Foata normal form. 12/13239 useless extension candidates. Maximal degree in co-relation 105575. Up to 12278 conditions per place. [2024-06-28 04:24:03,602 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 241 selfloop transitions, 139 changer transitions 0/386 dead transitions. [2024-06-28 04:24:03,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 386 transitions, 5791 flow [2024-06-28 04:24:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:03,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 04:24:03,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-28 04:24:03,604 INFO L175 Difference]: Start difference. First operand has 201 places, 331 transitions, 4263 flow. Second operand 8 states and 195 transitions. [2024-06-28 04:24:03,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 386 transitions, 5791 flow [2024-06-28 04:24:04,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 386 transitions, 5553 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-28 04:24:04,578 INFO L231 Difference]: Finished difference. Result has 207 places, 335 transitions, 4436 flow [2024-06-28 04:24:04,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4436, PETRI_PLACES=207, PETRI_TRANSITIONS=335} [2024-06-28 04:24:04,578 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 152 predicate places. [2024-06-28 04:24:04,578 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 335 transitions, 4436 flow [2024-06-28 04:24:04,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:04,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:04,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:04,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:24:04,579 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:24:04,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:04,579 INFO L85 PathProgramCache]: Analyzing trace with hash 90374353, now seen corresponding path program 1 times [2024-06-28 04:24:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:04,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264623117] [2024-06-28 04:24:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:04,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:08,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264623117] [2024-06-28 04:24:08,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264623117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:08,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:08,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181079650] [2024-06-28 04:24:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:08,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:08,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:08,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:24:08,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 335 transitions, 4436 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:08,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:08,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:24:08,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:12,496 INFO L124 PetriNetUnfolderBase]: 9821/13776 cut-off events. [2024-06-28 04:24:12,496 INFO L125 PetriNetUnfolderBase]: For 836000/836015 co-relation queries the response was YES. [2024-06-28 04:24:12,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111978 conditions, 13776 events. 9821/13776 cut-off events. For 836000/836015 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 75393 event pairs, 3028 based on Foata normal form. 18/13784 useless extension candidates. Maximal degree in co-relation 111887. Up to 12618 conditions per place. [2024-06-28 04:24:12,651 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 322 selfloop transitions, 117 changer transitions 0/445 dead transitions. [2024-06-28 04:24:12,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 445 transitions, 6712 flow [2024-06-28 04:24:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-28 04:24:12,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562937062937063 [2024-06-28 04:24:12,653 INFO L175 Difference]: Start difference. First operand has 207 places, 335 transitions, 4436 flow. Second operand 11 states and 261 transitions. [2024-06-28 04:24:12,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 445 transitions, 6712 flow [2024-06-28 04:24:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 445 transitions, 6493 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-28 04:24:14,218 INFO L231 Difference]: Finished difference. Result has 218 places, 366 transitions, 5008 flow [2024-06-28 04:24:14,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5008, PETRI_PLACES=218, PETRI_TRANSITIONS=366} [2024-06-28 04:24:14,219 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 163 predicate places. [2024-06-28 04:24:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 366 transitions, 5008 flow [2024-06-28 04:24:14,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:14,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:14,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:14,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:24:14,220 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:24:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash 237983612, now seen corresponding path program 4 times [2024-06-28 04:24:14,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:14,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823759811] [2024-06-28 04:24:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:17,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:17,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823759811] [2024-06-28 04:24:17,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823759811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:17,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:17,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:17,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394278844] [2024-06-28 04:24:17,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:17,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:17,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:17,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:24:17,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 366 transitions, 5008 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:17,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:17,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:24:17,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:21,969 INFO L124 PetriNetUnfolderBase]: 9840/13819 cut-off events. [2024-06-28 04:24:21,970 INFO L125 PetriNetUnfolderBase]: For 879034/879037 co-relation queries the response was YES. [2024-06-28 04:24:22,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116492 conditions, 13819 events. 9840/13819 cut-off events. For 879034/879037 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 75741 event pairs, 3013 based on Foata normal form. 4/13818 useless extension candidates. Maximal degree in co-relation 116397. Up to 13261 conditions per place. [2024-06-28 04:24:22,129 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 342 selfloop transitions, 64 changer transitions 0/412 dead transitions. [2024-06-28 04:24:22,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 412 transitions, 6046 flow [2024-06-28 04:24:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:24:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:24:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-28 04:24:22,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:24:22,131 INFO L175 Difference]: Start difference. First operand has 218 places, 366 transitions, 5008 flow. Second operand 8 states and 182 transitions. [2024-06-28 04:24:22,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 412 transitions, 6046 flow [2024-06-28 04:24:23,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 412 transitions, 5772 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:23,345 INFO L231 Difference]: Finished difference. Result has 221 places, 370 transitions, 4972 flow [2024-06-28 04:24:23,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4972, PETRI_PLACES=221, PETRI_TRANSITIONS=370} [2024-06-28 04:24:23,346 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 166 predicate places. [2024-06-28 04:24:23,346 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 370 transitions, 4972 flow [2024-06-28 04:24:23,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:23,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:23,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:23,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:24:23,346 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:24:23,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash 237983953, now seen corresponding path program 2 times [2024-06-28 04:24:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:23,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586457106] [2024-06-28 04:24:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:23,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:26,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:26,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586457106] [2024-06-28 04:24:26,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586457106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:26,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:26,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626358961] [2024-06-28 04:24:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:26,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:27,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:24:27,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 370 transitions, 4972 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:27,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:27,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:24:27,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:31,632 INFO L124 PetriNetUnfolderBase]: 10583/14812 cut-off events. [2024-06-28 04:24:31,632 INFO L125 PetriNetUnfolderBase]: For 971522/971531 co-relation queries the response was YES. [2024-06-28 04:24:31,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125450 conditions, 14812 events. 10583/14812 cut-off events. For 971522/971531 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 81170 event pairs, 3055 based on Foata normal form. 22/14821 useless extension candidates. Maximal degree in co-relation 125353. Up to 13526 conditions per place. [2024-06-28 04:24:31,968 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 373 selfloop transitions, 102 changer transitions 0/481 dead transitions. [2024-06-28 04:24:31,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 481 transitions, 7271 flow [2024-06-28 04:24:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-28 04:24:31,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44755244755244755 [2024-06-28 04:24:31,970 INFO L175 Difference]: Start difference. First operand has 221 places, 370 transitions, 4972 flow. Second operand 11 states and 256 transitions. [2024-06-28 04:24:31,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 481 transitions, 7271 flow [2024-06-28 04:24:33,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 481 transitions, 7095 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 04:24:33,678 INFO L231 Difference]: Finished difference. Result has 231 places, 412 transitions, 5820 flow [2024-06-28 04:24:33,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4804, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5820, PETRI_PLACES=231, PETRI_TRANSITIONS=412} [2024-06-28 04:24:33,678 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-28 04:24:33,678 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 412 transitions, 5820 flow [2024-06-28 04:24:33,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:33,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:33,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:24:33,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:24:33,679 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:24:33,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash -587749639, now seen corresponding path program 3 times [2024-06-28 04:24:33,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:33,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585688077] [2024-06-28 04:24:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:33,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:37,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:37,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585688077] [2024-06-28 04:24:37,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585688077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:37,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:37,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:24:37,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818719947] [2024-06-28 04:24:37,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:37,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:24:37,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:37,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:24:37,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:24:37,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:24:37,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 412 transitions, 5820 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:37,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:37,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:24:37,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand