./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe019_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe019_power.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-76401ed-m [2024-06-20 17:14:28,063 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:14:28,131 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:14:28,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:14:28,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:14:28,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:14:28,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:14:28,168 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:14:28,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:14:28,172 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:14:28,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:14:28,172 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:14:28,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:14:28,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:14:28,182 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:14:28,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:14:28,182 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:14:28,182 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:14:28,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:14:28,183 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:14:28,183 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:14:28,183 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:14:28,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:14:28,183 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:14:28,184 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:14:28,184 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:14:28,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:14:28,184 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:14:28,185 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:14:28,185 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:14:28,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:14:28,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:14:28,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:14:28,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:14:28,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:14:28,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:14:28,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:14:28,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:14:28,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:14:28,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:14:28,188 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:14:28,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:14:28,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:14:28,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:14:28,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:14:28,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:14:28,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:14:28,402 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:14:28,403 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:14:28,403 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe019_power.oepc.yml/witness.yml [2024-06-20 17:14:28,633 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:14:28,634 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:14:28,635 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-20 17:14:29,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:14:29,840 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:14:29,840 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-20 17:14:29,855 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bb08d899/e3b9500e503840069cb2a61078671db2/FLAG581b81ab9 [2024-06-20 17:14:29,865 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bb08d899/e3b9500e503840069cb2a61078671db2 [2024-06-20 17:14:29,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:14:29,867 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:14:29,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:14:29,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:14:29,873 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:14:29,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:14:28" (1/2) ... [2024-06-20 17:14:29,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3541b5a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:14:29, skipping insertion in model container [2024-06-20 17:14:29,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:14:28" (1/2) ... [2024-06-20 17:14:29,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5112116a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:14:29, skipping insertion in model container [2024-06-20 17:14:29,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:14:29" (2/2) ... [2024-06-20 17:14:29,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3541b5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:29, skipping insertion in model container [2024-06-20 17:14:29,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:14:29" (2/2) ... [2024-06-20 17:14:29,878 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:14:30,038 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:14:30,038 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __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 || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 17:14:30,039 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 17:14:30,039 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __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 || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 17:14:30,039 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 17:14:30,039 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:14:30,039 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-20 17:14:30,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:14:30,388 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:14:30,409 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:14:30,593 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:14:30,638 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:14:30,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30 WrapperNode [2024-06-20 17:14:30,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:14:30,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:14:30,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:14:30,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:14:30,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,713 INFO L138 Inliner]: procedures = 176, calls = 120, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 328 [2024-06-20 17:14:30,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:14:30,716 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:14:30,716 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:14:30,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:14:30,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,739 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,769 INFO L175 MemorySlicer]: Split 74 memory accesses to 2 slices as follows [2, 72]. 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]. [2024-06-20 17:14:30,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,817 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:14:30,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:14:30,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:14:30,818 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:14:30,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (1/1) ... [2024-06-20 17:14:30,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:14:30,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:14:30,847 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) [2024-06-20 17:14:30,850 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 [2024-06-20 17:14:30,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:14:30,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:14:30,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:14:30,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:14:30,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:14:30,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:14:30,877 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:14:30,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:14:30,877 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:14:30,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:14:30,877 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:14:30,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:14:30,878 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 17:14:30,878 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 17:14:30,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:14:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:14:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:14:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:14:30,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:14:30,880 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:14:31,025 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:14:31,027 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:14:31,484 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:14:31,485 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:14:32,048 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:14:32,048 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:14:32,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:14:32 BoogieIcfgContainer [2024-06-20 17:14:32,049 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:14:32,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:14:32,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:14:32,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:14:32,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:14:28" (1/4) ... [2024-06-20 17:14:32,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fca0233 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:14:32, skipping insertion in model container [2024-06-20 17:14:32,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:14:29" (2/4) ... [2024-06-20 17:14:32,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fca0233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:14:32, skipping insertion in model container [2024-06-20 17:14:32,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:14:30" (3/4) ... [2024-06-20 17:14:32,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fca0233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:14:32, skipping insertion in model container [2024-06-20 17:14:32,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:14:32" (4/4) ... [2024-06-20 17:14:32,056 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.oepc.i [2024-06-20 17:14:32,069 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:14:32,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 17:14:32,070 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:14:32,132 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:14:32,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 17:14:32,201 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-20 17:14:32,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:14:32,204 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 69 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. [2024-06-20 17:14:32,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 17:14:32,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-20 17:14:32,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:14:32,224 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;@3d07bcd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:14:32,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 17:14:32,228 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:14:32,229 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:14:32,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:14:32,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:32,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:14:32,230 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)] === [2024-06-20 17:14:32,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1000071962, now seen corresponding path program 1 times [2024-06-20 17:14:32,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:32,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488609296] [2024-06-20 17:14:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:32,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:34,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:34,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488609296] [2024-06-20 17:14:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488609296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:34,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:34,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:14:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564586225] [2024-06-20 17:14:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:34,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:14:34,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:14:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:14:34,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 17:14:34,271 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) [2024-06-20 17:14:34,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:34,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 17:14:34,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:35,683 INFO L124 PetriNetUnfolderBase]: 4366/6138 cut-off events. [2024-06-20 17:14:35,683 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-20 17:14:35,692 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 32258 event pairs, 3068 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-20 17:14:35,715 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-20 17:14:35,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 239 flow [2024-06-20 17:14:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:14:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:14:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-20 17:14:35,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-20 17:14:35,725 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-20 17:14:35,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 239 flow [2024-06-20 17:14:35,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:14:35,729 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-20 17:14:35,730 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} [2024-06-20 17:14:35,732 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-20 17:14:35,732 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-20 17:14:35,733 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) [2024-06-20 17:14:35,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:35,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:35,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:14:35,733 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)] === [2024-06-20 17:14:35,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1003346063, now seen corresponding path program 1 times [2024-06-20 17:14:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:35,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42953747] [2024-06-20 17:14:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:35,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:38,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:38,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42953747] [2024-06-20 17:14:38,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42953747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:38,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:38,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:14:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906398648] [2024-06-20 17:14:38,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:38,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:14:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:38,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:14:38,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:14:38,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 17:14:38,584 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) [2024-06-20 17:14:38,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:38,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 17:14:38,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:40,145 INFO L124 PetriNetUnfolderBase]: 4356/6125 cut-off events. [2024-06-20 17:14:40,146 INFO L125 PetriNetUnfolderBase]: For 1244/1254 co-relation queries the response was YES. [2024-06-20 17:14:40,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14294 conditions, 6125 events. 4356/6125 cut-off events. For 1244/1254 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32094 event pairs, 2547 based on Foata normal form. 7/6128 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-20 17:14:40,174 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-20 17:14:40,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 343 flow [2024-06-20 17:14:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:14:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:14:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-20 17:14:40,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-20 17:14:40,177 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-20 17:14:40,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 343 flow [2024-06-20 17:14:40,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:14:40,179 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-20 17:14:40,179 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} [2024-06-20 17:14:40,180 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-20 17:14:40,180 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-20 17:14:40,180 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) [2024-06-20 17:14:40,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:40,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:40,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:14:40,181 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)] === [2024-06-20 17:14:40,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:40,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2003305938, now seen corresponding path program 1 times [2024-06-20 17:14:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917372200] [2024-06-20 17:14:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:40,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:43,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917372200] [2024-06-20 17:14:43,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917372200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:43,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:43,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:14:43,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92809786] [2024-06-20 17:14:43,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:14:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:43,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:14:43,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:14:43,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 17:14:43,729 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) [2024-06-20 17:14:43,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:43,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 17:14:43,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:45,915 INFO L124 PetriNetUnfolderBase]: 5530/7706 cut-off events. [2024-06-20 17:14:45,916 INFO L125 PetriNetUnfolderBase]: For 4351/4370 co-relation queries the response was YES. [2024-06-20 17:14:45,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 7706 events. 5530/7706 cut-off events. For 4351/4370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40048 event pairs, 2395 based on Foata normal form. 14/7716 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-20 17:14:45,956 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-20 17:14:45,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 528 flow [2024-06-20 17:14:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-20 17:14:45,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-20 17:14:45,959 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 173 transitions. [2024-06-20 17:14:45,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 528 flow [2024-06-20 17:14:45,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 17:14:45,963 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-20 17:14:45,963 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} [2024-06-20 17:14:45,964 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-20 17:14:45,964 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-20 17:14:45,964 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) [2024-06-20 17:14:45,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:45,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:45,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:14:45,965 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)] === [2024-06-20 17:14:45,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:45,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1730772379, now seen corresponding path program 1 times [2024-06-20 17:14:45,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:45,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797862133] [2024-06-20 17:14:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:45,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797862133] [2024-06-20 17:14:47,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797862133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:47,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:47,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:14:47,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722003691] [2024-06-20 17:14:47,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:47,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:14:47,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:14:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:14:47,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:14:47,558 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) [2024-06-20 17:14:47,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:47,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:14:47,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:49,594 INFO L124 PetriNetUnfolderBase]: 6648/9210 cut-off events. [2024-06-20 17:14:49,594 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-20 17:14:49,609 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 47542 event pairs, 3316 based on Foata normal form. 3/9210 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-20 17:14:49,640 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-20 17:14:49,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 494 flow [2024-06-20 17:14:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:14:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:14:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 17:14:49,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-20 17:14:49,641 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 118 transitions. [2024-06-20 17:14:49,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 494 flow [2024-06-20 17:14:49,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 450 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:14:49,646 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 286 flow [2024-06-20 17:14:49,646 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} [2024-06-20 17:14:49,647 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-20 17:14:49,647 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 286 flow [2024-06-20 17:14:49,647 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) [2024-06-20 17:14:49,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:49,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:49,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:14:49,647 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)] === [2024-06-20 17:14:49,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1120074138, now seen corresponding path program 1 times [2024-06-20 17:14:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:49,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750762746] [2024-06-20 17:14:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:52,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750762746] [2024-06-20 17:14:52,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750762746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:52,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:52,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:14:52,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721027586] [2024-06-20 17:14:52,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:52,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:14:52,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:14:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:14:52,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:14:52,465 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) [2024-06-20 17:14:52,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:52,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:14:52,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:14:54,917 INFO L124 PetriNetUnfolderBase]: 6675/9240 cut-off events. [2024-06-20 17:14:54,917 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-20 17:14:54,932 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 47618 event pairs, 3168 based on Foata normal form. 3/9237 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-20 17:14:54,996 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-20 17:14:54,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 675 flow [2024-06-20 17:14:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:14:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:14:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:14:54,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 17:14:54,999 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 286 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:14:54,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 675 flow [2024-06-20 17:14:55,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-20 17:14:55,019 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 409 flow [2024-06-20 17:14:55,020 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} [2024-06-20 17:14:55,020 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-20 17:14:55,020 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 409 flow [2024-06-20 17:14:55,021 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) [2024-06-20 17:14:55,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:14:55,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:14:55,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:14:55,021 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)] === [2024-06-20 17:14:55,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:14:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1650619388, now seen corresponding path program 2 times [2024-06-20 17:14:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:14:55,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962776390] [2024-06-20 17:14:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:14:55,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:14:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:14:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:14:57,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:14:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962776390] [2024-06-20 17:14:57,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962776390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:14:57,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:14:57,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:14:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516483410] [2024-06-20 17:14:57,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:14:57,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:14:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:14:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:14:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:14:57,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:14:57,837 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) [2024-06-20 17:14:57,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:14:57,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:14:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:00,144 INFO L124 PetriNetUnfolderBase]: 6666/9238 cut-off events. [2024-06-20 17:15:00,144 INFO L125 PetriNetUnfolderBase]: For 20522/20537 co-relation queries the response was YES. [2024-06-20 17:15:00,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31511 conditions, 9238 events. 6666/9238 cut-off events. For 20522/20537 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47590 event pairs, 3175 based on Foata normal form. 13/9245 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-20 17:15:00,279 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-20 17:15:00,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 694 flow [2024-06-20 17:15:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 17:15:00,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 17:15:00,281 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-20 17:15:00,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 694 flow [2024-06-20 17:15:00,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 17:15:00,297 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 423 flow [2024-06-20 17:15:00,297 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} [2024-06-20 17:15:00,298 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-20 17:15:00,298 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 423 flow [2024-06-20 17:15:00,298 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) [2024-06-20 17:15:00,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:00,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:00,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:15:00,299 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)] === [2024-06-20 17:15:00,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1119858812, now seen corresponding path program 1 times [2024-06-20 17:15:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:00,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858708475] [2024-06-20 17:15:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:00,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:02,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:02,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858708475] [2024-06-20 17:15:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858708475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:02,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:02,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:15:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839600116] [2024-06-20 17:15:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:02,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:15:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:15:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:15:02,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:02,217 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) [2024-06-20 17:15:02,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:02,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:02,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:04,464 INFO L124 PetriNetUnfolderBase]: 6651/9214 cut-off events. [2024-06-20 17:15:04,465 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-20 17:15:04,479 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 47474 event pairs, 3011 based on Foata normal form. 6/9217 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-20 17:15:04,509 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-20 17:15:04,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 733 flow [2024-06-20 17:15:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:15:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:15:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 17:15:04,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-20 17:15:04,511 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 423 flow. Second operand 6 states and 141 transitions. [2024-06-20 17:15:04,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 733 flow [2024-06-20 17:15:04,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 17:15:04,525 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 454 flow [2024-06-20 17:15:04,525 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} [2024-06-20 17:15:04,526 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-20 17:15:04,526 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 454 flow [2024-06-20 17:15:04,526 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) [2024-06-20 17:15:04,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:04,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:15:04,527 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)] === [2024-06-20 17:15:04,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash -533380814, now seen corresponding path program 1 times [2024-06-20 17:15:04,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:04,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972528361] [2024-06-20 17:15:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:07,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:07,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972528361] [2024-06-20 17:15:07,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972528361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:07,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867271700] [2024-06-20 17:15:07,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:07,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:07,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:07,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:07,636 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) [2024-06-20 17:15:07,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:07,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:07,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:10,030 INFO L124 PetriNetUnfolderBase]: 6697/9305 cut-off events. [2024-06-20 17:15:10,030 INFO L125 PetriNetUnfolderBase]: For 30778/30781 co-relation queries the response was YES. [2024-06-20 17:15:10,051 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 48576 event pairs, 2838 based on Foata normal form. 7/9308 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-20 17:15:10,081 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-20 17:15:10,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 870 flow [2024-06-20 17:15:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 17:15:10,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-20 17:15:10,083 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 454 flow. Second operand 7 states and 176 transitions. [2024-06-20 17:15:10,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 870 flow [2024-06-20 17:15:10,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 832 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:10,105 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 526 flow [2024-06-20 17:15:10,106 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} [2024-06-20 17:15:10,108 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-20 17:15:10,108 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 526 flow [2024-06-20 17:15:10,108 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) [2024-06-20 17:15:10,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:10,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:10,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:15:10,108 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)] === [2024-06-20 17:15:10,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1434116708, now seen corresponding path program 2 times [2024-06-20 17:15:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:10,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830347404] [2024-06-20 17:15:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:13,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:13,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830347404] [2024-06-20 17:15:13,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830347404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:13,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:13,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:13,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563915225] [2024-06-20 17:15:13,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:13,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:13,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:13,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:13,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:13,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:13,213 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) [2024-06-20 17:15:13,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:13,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:13,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:15,813 INFO L124 PetriNetUnfolderBase]: 6724/9332 cut-off events. [2024-06-20 17:15:15,814 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-20 17:15:15,840 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 48320 event pairs, 2984 based on Foata normal form. 3/9329 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-20 17:15:15,876 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-20 17:15:15,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 145 transitions, 1096 flow [2024-06-20 17:15:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 17:15:15,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 17:15:15,878 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 526 flow. Second operand 7 states and 175 transitions. [2024-06-20 17:15:15,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 145 transitions, 1096 flow [2024-06-20 17:15:15,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:15,900 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 682 flow [2024-06-20 17:15:15,900 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} [2024-06-20 17:15:15,901 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-20 17:15:15,901 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 682 flow [2024-06-20 17:15:15,901 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) [2024-06-20 17:15:15,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:15,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:15,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:15:15,902 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)] === [2024-06-20 17:15:15,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1884696142, now seen corresponding path program 3 times [2024-06-20 17:15:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:15,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519114508] [2024-06-20 17:15:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:18,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:18,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519114508] [2024-06-20 17:15:18,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519114508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:18,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:18,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:18,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328816443] [2024-06-20 17:15:18,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:18,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:18,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:18,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:19,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:19,008 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) [2024-06-20 17:15:19,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:19,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:19,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:21,730 INFO L124 PetriNetUnfolderBase]: 6715/9322 cut-off events. [2024-06-20 17:15:21,730 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-20 17:15:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39394 conditions, 9322 events. 6715/9322 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48125 event pairs, 3001 based on Foata normal form. 3/9315 useless extension candidates. Maximal degree in co-relation 39363. Up to 9050 conditions per place. [2024-06-20 17:15:21,791 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-20 17:15:21,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1057 flow [2024-06-20 17:15:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 17:15:21,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 17:15:21,793 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 682 flow. Second operand 7 states and 168 transitions. [2024-06-20 17:15:21,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1057 flow [2024-06-20 17:15:21,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-20 17:15:21,821 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 710 flow [2024-06-20 17:15:21,822 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} [2024-06-20 17:15:21,822 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-20 17:15:21,822 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 710 flow [2024-06-20 17:15:21,822 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) [2024-06-20 17:15:21,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:21,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:21,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:15:21,823 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)] === [2024-06-20 17:15:21,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash 60593413, now seen corresponding path program 1 times [2024-06-20 17:15:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:21,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167822433] [2024-06-20 17:15:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:21,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167822433] [2024-06-20 17:15:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167822433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:24,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458962528] [2024-06-20 17:15:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:24,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:24,286 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) [2024-06-20 17:15:24,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:24,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:24,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:26,781 INFO L124 PetriNetUnfolderBase]: 6861/9541 cut-off events. [2024-06-20 17:15:26,782 INFO L125 PetriNetUnfolderBase]: For 57471/57471 co-relation queries the response was YES. [2024-06-20 17:15:26,807 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 49170 event pairs, 2984 based on Foata normal form. 6/9541 useless extension candidates. Maximal degree in co-relation 41272. Up to 9256 conditions per place. [2024-06-20 17:15:26,842 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 126 selfloop transitions, 42 changer transitions 0/174 dead transitions. [2024-06-20 17:15:26,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 1392 flow [2024-06-20 17:15:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 17:15:26,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-20 17:15:26,844 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 710 flow. Second operand 8 states and 196 transitions. [2024-06-20 17:15:26,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 1392 flow [2024-06-20 17:15:26,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 174 transitions, 1306 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:15:26,887 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 977 flow [2024-06-20 17:15:26,887 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} [2024-06-20 17:15:26,887 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-20 17:15:26,888 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 977 flow [2024-06-20 17:15:26,888 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) [2024-06-20 17:15:26,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:26,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:26,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:15:26,888 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)] === [2024-06-20 17:15:26,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:26,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1507937509, now seen corresponding path program 2 times [2024-06-20 17:15:26,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:26,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681577196] [2024-06-20 17:15:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:26,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:29,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681577196] [2024-06-20 17:15:29,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681577196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:29,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:29,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:29,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504811018] [2024-06-20 17:15:29,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:29,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:29,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:29,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:29,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:29,952 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) [2024-06-20 17:15:29,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:29,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:29,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:32,610 INFO L124 PetriNetUnfolderBase]: 6905/9605 cut-off events. [2024-06-20 17:15:32,610 INFO L125 PetriNetUnfolderBase]: For 69311/69311 co-relation queries the response was YES. [2024-06-20 17:15:32,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43745 conditions, 9605 events. 6905/9605 cut-off events. For 69311/69311 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 49760 event pairs, 2940 based on Foata normal form. 6/9605 useless extension candidates. Maximal degree in co-relation 43708. Up to 9274 conditions per place. [2024-06-20 17:15:32,666 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 121 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-06-20 17:15:32,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 170 transitions, 1483 flow [2024-06-20 17:15:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 17:15:32,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-20 17:15:32,668 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 977 flow. Second operand 7 states and 170 transitions. [2024-06-20 17:15:32,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 170 transitions, 1483 flow [2024-06-20 17:15:32,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 170 transitions, 1411 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 17:15:32,724 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 1052 flow [2024-06-20 17:15:32,725 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=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1052, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2024-06-20 17:15:32,725 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-20 17:15:32,725 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 1052 flow [2024-06-20 17:15:32,725 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) [2024-06-20 17:15:32,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:32,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:32,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:15:32,725 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)] === [2024-06-20 17:15:32,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2043954611, now seen corresponding path program 3 times [2024-06-20 17:15:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469815372] [2024-06-20 17:15:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:32,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469815372] [2024-06-20 17:15:35,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469815372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:35,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:35,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:35,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756656708] [2024-06-20 17:15:35,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:35,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:35,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:35,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:35,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 1052 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) [2024-06-20 17:15:35,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:35,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:35,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:38,368 INFO L124 PetriNetUnfolderBase]: 6949/9679 cut-off events. [2024-06-20 17:15:38,368 INFO L125 PetriNetUnfolderBase]: For 81990/82005 co-relation queries the response was YES. [2024-06-20 17:15:38,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45943 conditions, 9679 events. 6949/9679 cut-off events. For 81990/82005 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50241 event pairs, 2959 based on Foata normal form. 16/9686 useless extension candidates. Maximal degree in co-relation 45905. Up to 9376 conditions per place. [2024-06-20 17:15:38,429 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 125 selfloop transitions, 40 changer transitions 0/171 dead transitions. [2024-06-20 17:15:38,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 171 transitions, 1566 flow [2024-06-20 17:15:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 17:15:38,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-20 17:15:38,431 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 1052 flow. Second operand 7 states and 166 transitions. [2024-06-20 17:15:38,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 171 transitions, 1566 flow [2024-06-20 17:15:38,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1443 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:38,470 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 1072 flow [2024-06-20 17:15:38,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1072, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2024-06-20 17:15:38,470 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-20 17:15:38,471 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 1072 flow [2024-06-20 17:15:38,471 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) [2024-06-20 17:15:38,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:38,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:15:38,471 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)] === [2024-06-20 17:15:38,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash -860873287, now seen corresponding path program 4 times [2024-06-20 17:15:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:38,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711557783] [2024-06-20 17:15:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:41,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711557783] [2024-06-20 17:15:41,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711557783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:41,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:41,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:15:41,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124297921] [2024-06-20 17:15:41,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:41,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:15:41,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:15:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:15:41,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:41,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 1072 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) [2024-06-20 17:15:41,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:41,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:41,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:43,752 INFO L124 PetriNetUnfolderBase]: 6934/9658 cut-off events. [2024-06-20 17:15:43,752 INFO L125 PetriNetUnfolderBase]: For 81582/81597 co-relation queries the response was YES. [2024-06-20 17:15:43,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 9658 events. 6934/9658 cut-off events. For 81582/81597 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50031 event pairs, 2722 based on Foata normal form. 16/9665 useless extension candidates. Maximal degree in co-relation 45591. Up to 9185 conditions per place. [2024-06-20 17:15:43,827 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 117 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-06-20 17:15:43,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 174 transitions, 1586 flow [2024-06-20 17:15:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:15:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:15:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 17:15:43,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-20 17:15:43,829 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 1072 flow. Second operand 7 states and 167 transitions. [2024-06-20 17:15:43,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 174 transitions, 1586 flow [2024-06-20 17:15:43,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 174 transitions, 1477 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:43,877 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1127 flow [2024-06-20 17:15:43,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1127, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-20 17:15:43,878 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-20 17:15:43,878 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1127 flow [2024-06-20 17:15:43,878 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) [2024-06-20 17:15:43,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:43,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:43,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:15:43,878 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)] === [2024-06-20 17:15:43,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:43,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1976951789, now seen corresponding path program 1 times [2024-06-20 17:15:43,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:43,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767896312] [2024-06-20 17:15:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:47,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767896312] [2024-06-20 17:15:47,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767896312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:47,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:47,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:47,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151852007] [2024-06-20 17:15:47,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:47,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:47,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1127 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) [2024-06-20 17:15:47,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:47,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:47,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:50,461 INFO L124 PetriNetUnfolderBase]: 7532/10542 cut-off events. [2024-06-20 17:15:50,461 INFO L125 PetriNetUnfolderBase]: For 107622/107625 co-relation queries the response was YES. [2024-06-20 17:15:50,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52174 conditions, 10542 events. 7532/10542 cut-off events. For 107622/107625 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55933 event pairs, 2362 based on Foata normal form. 32/10570 useless extension candidates. Maximal degree in co-relation 52134. Up to 9547 conditions per place. [2024-06-20 17:15:50,527 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 167 selfloop transitions, 43 changer transitions 0/216 dead transitions. [2024-06-20 17:15:50,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 216 transitions, 1979 flow [2024-06-20 17:15:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:15:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:15:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-20 17:15:50,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-20 17:15:50,542 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1127 flow. Second operand 9 states and 231 transitions. [2024-06-20 17:15:50,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 216 transitions, 1979 flow [2024-06-20 17:15:50,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 1841 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:50,616 INFO L231 Difference]: Finished difference. Result has 107 places, 139 transitions, 1221 flow [2024-06-20 17:15:50,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1221, PETRI_PLACES=107, PETRI_TRANSITIONS=139} [2024-06-20 17:15:50,617 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-20 17:15:50,617 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 139 transitions, 1221 flow [2024-06-20 17:15:50,617 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) [2024-06-20 17:15:50,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:50,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:15:50,618 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)] === [2024-06-20 17:15:50,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:50,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1477805135, now seen corresponding path program 2 times [2024-06-20 17:15:50,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:50,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856198653] [2024-06-20 17:15:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:50,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:15:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:15:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:15:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856198653] [2024-06-20 17:15:54,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856198653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:15:54,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:15:54,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:15:54,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109089153] [2024-06-20 17:15:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:15:54,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:15:54,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:15:54,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:15:54,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:15:54,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:15:54,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 139 transitions, 1221 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) [2024-06-20 17:15:54,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:15:54,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:15:54,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:15:57,518 INFO L124 PetriNetUnfolderBase]: 7434/10404 cut-off events. [2024-06-20 17:15:57,518 INFO L125 PetriNetUnfolderBase]: For 120084/120087 co-relation queries the response was YES. [2024-06-20 17:15:57,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52857 conditions, 10404 events. 7434/10404 cut-off events. For 120084/120087 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 55275 event pairs, 2842 based on Foata normal form. 42/10442 useless extension candidates. Maximal degree in co-relation 52815. Up to 9803 conditions per place. [2024-06-20 17:15:57,583 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 159 selfloop transitions, 37 changer transitions 0/202 dead transitions. [2024-06-20 17:15:57,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 202 transitions, 1828 flow [2024-06-20 17:15:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:15:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:15:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 17:15:57,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-20 17:15:57,586 INFO L175 Difference]: Start difference. First operand has 107 places, 139 transitions, 1221 flow. Second operand 8 states and 202 transitions. [2024-06-20 17:15:57,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 202 transitions, 1828 flow [2024-06-20 17:15:57,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 202 transitions, 1730 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 17:15:57,686 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1231 flow [2024-06-20 17:15:57,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1231, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2024-06-20 17:15:57,687 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-20 17:15:57,687 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1231 flow [2024-06-20 17:15:57,688 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) [2024-06-20 17:15:57,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:15:57,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:15:57,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:15:57,688 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)] === [2024-06-20 17:15:57,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:15:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1086807485, now seen corresponding path program 3 times [2024-06-20 17:15:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:15:57,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675037345] [2024-06-20 17:15:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:15:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:15:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:01,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:01,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675037345] [2024-06-20 17:16:01,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675037345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:01,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:01,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:01,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512903048] [2024-06-20 17:16:01,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:01,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:01,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:01,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1231 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) [2024-06-20 17:16:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:01,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:04,395 INFO L124 PetriNetUnfolderBase]: 7590/10652 cut-off events. [2024-06-20 17:16:04,395 INFO L125 PetriNetUnfolderBase]: For 127547/127547 co-relation queries the response was YES. [2024-06-20 17:16:04,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54343 conditions, 10652 events. 7590/10652 cut-off events. For 127547/127547 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 56996 event pairs, 2884 based on Foata normal form. 24/10670 useless extension candidates. Maximal degree in co-relation 54299. Up to 10059 conditions per place. [2024-06-20 17:16:04,474 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 144 selfloop transitions, 51 changer transitions 0/201 dead transitions. [2024-06-20 17:16:04,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 201 transitions, 1853 flow [2024-06-20 17:16:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 17:16:04,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-20 17:16:04,477 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1231 flow. Second operand 8 states and 197 transitions. [2024-06-20 17:16:04,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 201 transitions, 1853 flow [2024-06-20 17:16:04,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 201 transitions, 1782 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:04,586 INFO L231 Difference]: Finished difference. Result has 112 places, 142 transitions, 1320 flow [2024-06-20 17:16:04,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=112, PETRI_TRANSITIONS=142} [2024-06-20 17:16:04,587 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-20 17:16:04,587 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 142 transitions, 1320 flow [2024-06-20 17:16:04,587 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) [2024-06-20 17:16:04,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:04,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:16:04,587 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)] === [2024-06-20 17:16:04,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1086623035, now seen corresponding path program 1 times [2024-06-20 17:16:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:04,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89362503] [2024-06-20 17:16:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89362503] [2024-06-20 17:16:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89362503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:08,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:08,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341515309] [2024-06-20 17:16:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:08,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:08,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:08,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:08,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 142 transitions, 1320 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) [2024-06-20 17:16:08,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:08,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:08,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:10,858 INFO L124 PetriNetUnfolderBase]: 7702/10844 cut-off events. [2024-06-20 17:16:10,858 INFO L125 PetriNetUnfolderBase]: For 143658/143658 co-relation queries the response was YES. [2024-06-20 17:16:10,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56649 conditions, 10844 events. 7702/10844 cut-off events. For 143658/143658 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58603 event pairs, 2868 based on Foata normal form. 18/10856 useless extension candidates. Maximal degree in co-relation 56604. Up to 9791 conditions per place. [2024-06-20 17:16:10,942 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 143 selfloop transitions, 58 changer transitions 0/207 dead transitions. [2024-06-20 17:16:10,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 207 transitions, 1987 flow [2024-06-20 17:16:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 17:16:10,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-20 17:16:10,945 INFO L175 Difference]: Start difference. First operand has 112 places, 142 transitions, 1320 flow. Second operand 8 states and 199 transitions. [2024-06-20 17:16:10,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 207 transitions, 1987 flow [2024-06-20 17:16:11,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 207 transitions, 1865 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:11,076 INFO L231 Difference]: Finished difference. Result has 115 places, 145 transitions, 1412 flow [2024-06-20 17:16:11,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=115, PETRI_TRANSITIONS=145} [2024-06-20 17:16:11,078 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-20 17:16:11,078 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 145 transitions, 1412 flow [2024-06-20 17:16:11,078 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) [2024-06-20 17:16:11,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:11,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:11,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:16:11,079 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)] === [2024-06-20 17:16:11,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1283255345, now seen corresponding path program 4 times [2024-06-20 17:16:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:11,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020604950] [2024-06-20 17:16:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:14,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:14,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020604950] [2024-06-20 17:16:14,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020604950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:14,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:14,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558793844] [2024-06-20 17:16:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:14,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:14,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:14,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 145 transitions, 1412 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) [2024-06-20 17:16:14,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:14,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:14,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:17,973 INFO L124 PetriNetUnfolderBase]: 7799/10996 cut-off events. [2024-06-20 17:16:17,973 INFO L125 PetriNetUnfolderBase]: For 161116/161116 co-relation queries the response was YES. [2024-06-20 17:16:18,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58779 conditions, 10996 events. 7799/10996 cut-off events. For 161116/161116 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 59606 event pairs, 2945 based on Foata normal form. 24/11007 useless extension candidates. Maximal degree in co-relation 58732. Up to 10382 conditions per place. [2024-06-20 17:16:18,045 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 147 selfloop transitions, 50 changer transitions 0/203 dead transitions. [2024-06-20 17:16:18,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 203 transitions, 2042 flow [2024-06-20 17:16:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:16:18,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-20 17:16:18,050 INFO L175 Difference]: Start difference. First operand has 115 places, 145 transitions, 1412 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:16:18,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 203 transitions, 2042 flow [2024-06-20 17:16:18,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 203 transitions, 1913 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:16:18,156 INFO L231 Difference]: Finished difference. Result has 118 places, 147 transitions, 1449 flow [2024-06-20 17:16:18,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=118, PETRI_TRANSITIONS=147} [2024-06-20 17:16:18,157 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-20 17:16:18,157 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 147 transitions, 1449 flow [2024-06-20 17:16:18,157 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) [2024-06-20 17:16:18,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:18,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:18,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:16:18,157 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)] === [2024-06-20 17:16:18,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1357336661, now seen corresponding path program 2 times [2024-06-20 17:16:18,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:18,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619407995] [2024-06-20 17:16:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:18,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:21,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:21,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619407995] [2024-06-20 17:16:21,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619407995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:21,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:21,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:21,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976469130] [2024-06-20 17:16:21,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:21,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:21,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:21,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:21,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:21,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 147 transitions, 1449 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) [2024-06-20 17:16:21,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:21,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:21,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:24,318 INFO L124 PetriNetUnfolderBase]: 7911/11188 cut-off events. [2024-06-20 17:16:24,319 INFO L125 PetriNetUnfolderBase]: For 179981/179981 co-relation queries the response was YES. [2024-06-20 17:16:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60725 conditions, 11188 events. 7911/11188 cut-off events. For 179981/179981 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 60920 event pairs, 2945 based on Foata normal form. 18/11193 useless extension candidates. Maximal degree in co-relation 60677. Up to 10364 conditions per place. [2024-06-20 17:16:24,406 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 150 selfloop transitions, 53 changer transitions 0/209 dead transitions. [2024-06-20 17:16:24,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 209 transitions, 2111 flow [2024-06-20 17:16:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 17:16:24,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-20 17:16:24,409 INFO L175 Difference]: Start difference. First operand has 118 places, 147 transitions, 1449 flow. Second operand 8 states and 196 transitions. [2024-06-20 17:16:24,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 209 transitions, 2111 flow [2024-06-20 17:16:24,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 209 transitions, 1983 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:24,544 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1496 flow [2024-06-20 17:16:24,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1496, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-06-20 17:16:24,545 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-20 17:16:24,545 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1496 flow [2024-06-20 17:16:24,546 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) [2024-06-20 17:16:24,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:24,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:24,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:16:24,546 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)] === [2024-06-20 17:16:24,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1190203631, now seen corresponding path program 3 times [2024-06-20 17:16:24,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:24,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629040223] [2024-06-20 17:16:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:24,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:27,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629040223] [2024-06-20 17:16:27,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629040223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:27,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:27,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:16:27,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020068596] [2024-06-20 17:16:27,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:27,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:16:27,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:16:27,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:16:28,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:28,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1496 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) [2024-06-20 17:16:28,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:28,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:28,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:31,046 INFO L124 PetriNetUnfolderBase]: 7872/11131 cut-off events. [2024-06-20 17:16:31,047 INFO L125 PetriNetUnfolderBase]: For 191659/191659 co-relation queries the response was YES. [2024-06-20 17:16:31,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60945 conditions, 11131 events. 7872/11131 cut-off events. For 191659/191659 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 60364 event pairs, 2578 based on Foata normal form. 18/11136 useless extension candidates. Maximal degree in co-relation 60896. Up to 9445 conditions per place. [2024-06-20 17:16:31,131 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 134 selfloop transitions, 69 changer transitions 0/209 dead transitions. [2024-06-20 17:16:31,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 2112 flow [2024-06-20 17:16:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:16:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:16:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 17:16:31,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 17:16:31,133 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1496 flow. Second operand 8 states and 195 transitions. [2024-06-20 17:16:31,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 2112 flow [2024-06-20 17:16:31,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 209 transitions, 1967 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:31,286 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1520 flow [2024-06-20 17:16:31,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1520, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2024-06-20 17:16:31,287 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-20 17:16:31,287 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1520 flow [2024-06-20 17:16:31,287 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) [2024-06-20 17:16:31,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:31,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:31,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:16:31,288 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)] === [2024-06-20 17:16:31,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash -516414229, now seen corresponding path program 1 times [2024-06-20 17:16:31,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984414699] [2024-06-20 17:16:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984414699] [2024-06-20 17:16:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984414699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:33,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:33,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:16:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184559994] [2024-06-20 17:16:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:33,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:16:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:16:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:16:33,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 17:16:33,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1520 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) [2024-06-20 17:16:33,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:33,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 17:16:33,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:35,835 INFO L124 PetriNetUnfolderBase]: 7455/10688 cut-off events. [2024-06-20 17:16:35,835 INFO L125 PetriNetUnfolderBase]: For 194799/194802 co-relation queries the response was YES. [2024-06-20 17:16:35,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59097 conditions, 10688 events. 7455/10688 cut-off events. For 194799/194802 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 59715 event pairs, 2921 based on Foata normal form. 10/10657 useless extension candidates. Maximal degree in co-relation 59047. Up to 10164 conditions per place. [2024-06-20 17:16:35,928 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 148 selfloop transitions, 17 changer transitions 0/184 dead transitions. [2024-06-20 17:16:35,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 184 transitions, 2068 flow [2024-06-20 17:16:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:16:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:16:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 17:16:35,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 17:16:35,930 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1520 flow. Second operand 5 states and 125 transitions. [2024-06-20 17:16:35,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 184 transitions, 2068 flow [2024-06-20 17:16:36,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 184 transitions, 1887 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:16:36,087 INFO L231 Difference]: Finished difference. Result has 121 places, 160 transitions, 1496 flow [2024-06-20 17:16:36,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1496, PETRI_PLACES=121, PETRI_TRANSITIONS=160} [2024-06-20 17:16:36,087 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-20 17:16:36,087 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 160 transitions, 1496 flow [2024-06-20 17:16:36,088 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) [2024-06-20 17:16:36,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:36,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:36,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:16:36,088 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)] === [2024-06-20 17:16:36,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2041814587, now seen corresponding path program 1 times [2024-06-20 17:16:36,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:36,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340250928] [2024-06-20 17:16:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:36,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:38,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:38,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340250928] [2024-06-20 17:16:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340250928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:38,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:38,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:16:38,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336063319] [2024-06-20 17:16:38,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:38,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:16:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:16:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:16:38,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:38,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 160 transitions, 1496 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) [2024-06-20 17:16:38,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:38,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:38,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:40,894 INFO L124 PetriNetUnfolderBase]: 7917/11202 cut-off events. [2024-06-20 17:16:40,895 INFO L125 PetriNetUnfolderBase]: For 215312/215318 co-relation queries the response was YES. [2024-06-20 17:16:40,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64283 conditions, 11202 events. 7917/11202 cut-off events. For 215312/215318 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61126 event pairs, 2930 based on Foata normal form. 6/11203 useless extension candidates. Maximal degree in co-relation 64231. Up to 10944 conditions per place. [2024-06-20 17:16:41,007 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 170 selfloop transitions, 21 changer transitions 0/197 dead transitions. [2024-06-20 17:16:41,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 197 transitions, 2188 flow [2024-06-20 17:16:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 17:16:41,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-20 17:16:41,009 INFO L175 Difference]: Start difference. First operand has 121 places, 160 transitions, 1496 flow. Second operand 6 states and 139 transitions. [2024-06-20 17:16:41,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 197 transitions, 2188 flow [2024-06-20 17:16:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 197 transitions, 2140 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-20 17:16:41,195 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 1651 flow [2024-06-20 17:16:41,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1651, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2024-06-20 17:16:41,196 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-20 17:16:41,196 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 1651 flow [2024-06-20 17:16:41,196 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) [2024-06-20 17:16:41,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:41,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:41,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:16:41,197 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)] === [2024-06-20 17:16:41,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2036274577, now seen corresponding path program 2 times [2024-06-20 17:16:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333143022] [2024-06-20 17:16:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333143022] [2024-06-20 17:16:43,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333143022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:43,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:43,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:16:43,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487038466] [2024-06-20 17:16:43,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:43,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:16:43,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:43,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:16:43,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:16:43,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:16:43,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 1651 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) [2024-06-20 17:16:43,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:43,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:16:43,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:45,681 INFO L124 PetriNetUnfolderBase]: 7910/11193 cut-off events. [2024-06-20 17:16:45,681 INFO L125 PetriNetUnfolderBase]: For 237107/237113 co-relation queries the response was YES. [2024-06-20 17:16:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66436 conditions, 11193 events. 7910/11193 cut-off events. For 237107/237113 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61161 event pairs, 2930 based on Foata normal form. 6/11194 useless extension candidates. Maximal degree in co-relation 66381. Up to 10948 conditions per place. [2024-06-20 17:16:45,775 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 167 selfloop transitions, 17 changer transitions 0/190 dead transitions. [2024-06-20 17:16:45,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 190 transitions, 2083 flow [2024-06-20 17:16:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:16:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:16:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 17:16:45,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-20 17:16:45,777 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 1651 flow. Second operand 5 states and 118 transitions. [2024-06-20 17:16:45,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 190 transitions, 2083 flow [2024-06-20 17:16:45,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 190 transitions, 1959 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-20 17:16:45,998 INFO L231 Difference]: Finished difference. Result has 129 places, 168 transitions, 1575 flow [2024-06-20 17:16:45,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1575, PETRI_PLACES=129, PETRI_TRANSITIONS=168} [2024-06-20 17:16:45,999 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-20 17:16:45,999 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 168 transitions, 1575 flow [2024-06-20 17:16:45,999 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) [2024-06-20 17:16:45,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:46,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:46,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:16:46,000 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)] === [2024-06-20 17:16:46,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1617060716, now seen corresponding path program 1 times [2024-06-20 17:16:46,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:46,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549359879] [2024-06-20 17:16:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:46,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:49,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:49,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549359879] [2024-06-20 17:16:49,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549359879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:49,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:49,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:16:49,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526762833] [2024-06-20 17:16:49,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:49,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:16:49,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:16:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:16:49,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 17:16:49,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 168 transitions, 1575 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) [2024-06-20 17:16:49,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:49,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 17:16:49,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:52,063 INFO L124 PetriNetUnfolderBase]: 7991/11431 cut-off events. [2024-06-20 17:16:52,064 INFO L125 PetriNetUnfolderBase]: For 262628/262654 co-relation queries the response was YES. [2024-06-20 17:16:52,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68323 conditions, 11431 events. 7991/11431 cut-off events. For 262628/262654 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 64063 event pairs, 2901 based on Foata normal form. 20/11403 useless extension candidates. Maximal degree in co-relation 68266. Up to 10509 conditions per place. [2024-06-20 17:16:52,175 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 178 selfloop transitions, 48 changer transitions 0/245 dead transitions. [2024-06-20 17:16:52,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 245 transitions, 2585 flow [2024-06-20 17:16:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:16:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:16:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 17:16:52,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 17:16:52,176 INFO L175 Difference]: Start difference. First operand has 129 places, 168 transitions, 1575 flow. Second operand 9 states and 216 transitions. [2024-06-20 17:16:52,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 245 transitions, 2585 flow [2024-06-20 17:16:52,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 245 transitions, 2551 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:16:52,382 INFO L231 Difference]: Finished difference. Result has 136 places, 190 transitions, 1898 flow [2024-06-20 17:16:52,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1898, PETRI_PLACES=136, PETRI_TRANSITIONS=190} [2024-06-20 17:16:52,383 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-20 17:16:52,383 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 190 transitions, 1898 flow [2024-06-20 17:16:52,383 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) [2024-06-20 17:16:52,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:52,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:52,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:16:52,383 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)] === [2024-06-20 17:16:52,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1300201128, now seen corresponding path program 2 times [2024-06-20 17:16:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:52,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245479860] [2024-06-20 17:16:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:52,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:16:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:16:55,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:16:55,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245479860] [2024-06-20 17:16:55,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245479860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:16:55,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:16:55,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:16:55,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357041572] [2024-06-20 17:16:55,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:16:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:16:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:16:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:16:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:16:55,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 17:16:55,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 190 transitions, 1898 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) [2024-06-20 17:16:55,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:16:55,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 17:16:55,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:16:58,066 INFO L124 PetriNetUnfolderBase]: 8152/11655 cut-off events. [2024-06-20 17:16:58,066 INFO L125 PetriNetUnfolderBase]: For 292321/292389 co-relation queries the response was YES. [2024-06-20 17:16:58,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73715 conditions, 11655 events. 8152/11655 cut-off events. For 292321/292389 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 65416 event pairs, 2914 based on Foata normal form. 27/11613 useless extension candidates. Maximal degree in co-relation 73655. Up to 10383 conditions per place. [2024-06-20 17:16:58,177 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 164 selfloop transitions, 61 changer transitions 0/244 dead transitions. [2024-06-20 17:16:58,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 244 transitions, 2860 flow [2024-06-20 17:16:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:16:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:16:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 17:16:58,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-20 17:16:58,178 INFO L175 Difference]: Start difference. First operand has 136 places, 190 transitions, 1898 flow. Second operand 6 states and 152 transitions. [2024-06-20 17:16:58,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 244 transitions, 2860 flow [2024-06-20 17:16:58,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 244 transitions, 2770 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-20 17:16:58,445 INFO L231 Difference]: Finished difference. Result has 141 places, 209 transitions, 2234 flow [2024-06-20 17:16:58,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2234, PETRI_PLACES=141, PETRI_TRANSITIONS=209} [2024-06-20 17:16:58,446 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-20 17:16:58,447 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 209 transitions, 2234 flow [2024-06-20 17:16:58,448 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) [2024-06-20 17:16:58,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:16:58,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:16:58,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:16:58,448 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)] === [2024-06-20 17:16:58,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:16:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1299815178, now seen corresponding path program 3 times [2024-06-20 17:16:58,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:16:58,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026600525] [2024-06-20 17:16:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:16:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:16:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:01,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:01,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026600525] [2024-06-20 17:17:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026600525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:01,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:01,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:01,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095266385] [2024-06-20 17:17:01,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:01,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:01,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:01,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:01,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:01,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 17:17:01,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 209 transitions, 2234 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) [2024-06-20 17:17:01,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:01,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 17:17:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:04,231 INFO L124 PetriNetUnfolderBase]: 8119/11623 cut-off events. [2024-06-20 17:17:04,232 INFO L125 PetriNetUnfolderBase]: For 318263/318335 co-relation queries the response was YES. [2024-06-20 17:17:04,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76825 conditions, 11623 events. 8119/11623 cut-off events. For 318263/318335 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65393 event pairs, 2899 based on Foata normal form. 20/11591 useless extension candidates. Maximal degree in co-relation 76762. Up to 10665 conditions per place. [2024-06-20 17:17:04,326 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 180 selfloop transitions, 50 changer transitions 0/249 dead transitions. [2024-06-20 17:17:04,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 249 transitions, 2879 flow [2024-06-20 17:17:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 17:17:04,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-20 17:17:04,328 INFO L175 Difference]: Start difference. First operand has 141 places, 209 transitions, 2234 flow. Second operand 7 states and 170 transitions. [2024-06-20 17:17:04,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 249 transitions, 2879 flow [2024-06-20 17:17:04,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 249 transitions, 2797 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-20 17:17:04,693 INFO L231 Difference]: Finished difference. Result has 148 places, 210 transitions, 2314 flow [2024-06-20 17:17:04,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2314, PETRI_PLACES=148, PETRI_TRANSITIONS=210} [2024-06-20 17:17:04,693 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-20 17:17:04,693 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 210 transitions, 2314 flow [2024-06-20 17:17:04,694 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) [2024-06-20 17:17:04,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:04,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:04,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:17:04,694 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)] === [2024-06-20 17:17:04,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:04,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1717005212, now seen corresponding path program 1 times [2024-06-20 17:17:04,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:04,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036140231] [2024-06-20 17:17:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:04,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:06,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036140231] [2024-06-20 17:17:06,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036140231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:06,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:06,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:06,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922962420] [2024-06-20 17:17:06,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:06,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:06,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:06,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:07,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:07,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 210 transitions, 2314 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) [2024-06-20 17:17:07,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:07,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:07,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:10,711 INFO L124 PetriNetUnfolderBase]: 8852/12464 cut-off events. [2024-06-20 17:17:10,711 INFO L125 PetriNetUnfolderBase]: For 325134/325134 co-relation queries the response was YES. [2024-06-20 17:17:10,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80711 conditions, 12464 events. 8852/12464 cut-off events. For 325134/325134 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67881 event pairs, 2971 based on Foata normal form. 8/12465 useless extension candidates. Maximal degree in co-relation 80644. Up to 11852 conditions per place. [2024-06-20 17:17:10,808 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 229 selfloop transitions, 37 changer transitions 0/272 dead transitions. [2024-06-20 17:17:10,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 272 transitions, 3458 flow [2024-06-20 17:17:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 17:17:10,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 17:17:10,810 INFO L175 Difference]: Start difference. First operand has 148 places, 210 transitions, 2314 flow. Second operand 7 states and 175 transitions. [2024-06-20 17:17:10,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 272 transitions, 3458 flow [2024-06-20 17:17:11,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 272 transitions, 3349 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:11,161 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 2527 flow [2024-06-20 17:17:11,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2527, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2024-06-20 17:17:11,170 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-20 17:17:11,171 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 2527 flow [2024-06-20 17:17:11,171 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) [2024-06-20 17:17:11,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:11,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:11,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:17:11,171 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)] === [2024-06-20 17:17:11,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1300207080, now seen corresponding path program 2 times [2024-06-20 17:17:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644531782] [2024-06-20 17:17:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:13,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644531782] [2024-06-20 17:17:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644531782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:13,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:13,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296754434] [2024-06-20 17:17:13,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:13,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:13,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:13,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:13,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 2527 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) [2024-06-20 17:17:13,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:13,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:13,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:17,012 INFO L124 PetriNetUnfolderBase]: 8974/12633 cut-off events. [2024-06-20 17:17:17,013 INFO L125 PetriNetUnfolderBase]: For 358675/358678 co-relation queries the response was YES. [2024-06-20 17:17:17,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84885 conditions, 12633 events. 8974/12633 cut-off events. For 358675/358678 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 68754 event pairs, 2962 based on Foata normal form. 10/12638 useless extension candidates. Maximal degree in co-relation 84815. Up to 12048 conditions per place. [2024-06-20 17:17:17,120 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 243 selfloop transitions, 39 changer transitions 0/288 dead transitions. [2024-06-20 17:17:17,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 3679 flow [2024-06-20 17:17:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 17:17:17,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-20 17:17:17,122 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 2527 flow. Second operand 8 states and 196 transitions. [2024-06-20 17:17:17,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 3679 flow [2024-06-20 17:17:17,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 288 transitions, 3556 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-20 17:17:17,475 INFO L231 Difference]: Finished difference. Result has 160 places, 236 transitions, 2719 flow [2024-06-20 17:17:17,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2719, PETRI_PLACES=160, PETRI_TRANSITIONS=236} [2024-06-20 17:17:17,477 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-20 17:17:17,477 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 236 transitions, 2719 flow [2024-06-20 17:17:17,477 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) [2024-06-20 17:17:17,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:17,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:17:17,478 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)] === [2024-06-20 17:17:17,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1299999690, now seen corresponding path program 3 times [2024-06-20 17:17:17,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:17,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547946854] [2024-06-20 17:17:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:17,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:19,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547946854] [2024-06-20 17:17:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547946854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:19,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:19,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:19,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482414010] [2024-06-20 17:17:19,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:19,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:19,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 236 transitions, 2719 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) [2024-06-20 17:17:19,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:19,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:19,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:23,152 INFO L124 PetriNetUnfolderBase]: 8956/12612 cut-off events. [2024-06-20 17:17:23,152 INFO L125 PetriNetUnfolderBase]: For 380082/380082 co-relation queries the response was YES. [2024-06-20 17:17:23,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85851 conditions, 12612 events. 8956/12612 cut-off events. For 380082/380082 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 68691 event pairs, 2986 based on Foata normal form. 8/12613 useless extension candidates. Maximal degree in co-relation 85778. Up to 12038 conditions per place. [2024-06-20 17:17:23,262 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 231 selfloop transitions, 35 changer transitions 0/272 dead transitions. [2024-06-20 17:17:23,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 272 transitions, 3489 flow [2024-06-20 17:17:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:17:23,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 17:17:23,266 INFO L175 Difference]: Start difference. First operand has 160 places, 236 transitions, 2719 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:17:23,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 272 transitions, 3489 flow [2024-06-20 17:17:23,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 272 transitions, 3302 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:23,658 INFO L231 Difference]: Finished difference. Result has 162 places, 236 transitions, 2613 flow [2024-06-20 17:17:23,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2613, PETRI_PLACES=162, PETRI_TRANSITIONS=236} [2024-06-20 17:17:23,659 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-20 17:17:23,659 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 236 transitions, 2613 flow [2024-06-20 17:17:23,659 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) [2024-06-20 17:17:23,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:23,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:23,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:17:23,660 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)] === [2024-06-20 17:17:23,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1300215016, now seen corresponding path program 1 times [2024-06-20 17:17:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282426181] [2024-06-20 17:17:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:23,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:26,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:26,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282426181] [2024-06-20 17:17:26,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282426181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:26,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:26,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:26,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107611221] [2024-06-20 17:17:26,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:26,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:26,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:26,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:26,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 17:17:26,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 236 transitions, 2613 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:26,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:26,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 17:17:26,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:30,438 INFO L124 PetriNetUnfolderBase]: 8400/12039 cut-off events. [2024-06-20 17:17:30,439 INFO L125 PetriNetUnfolderBase]: For 392889/392968 co-relation queries the response was YES. [2024-06-20 17:17:30,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82669 conditions, 12039 events. 8400/12039 cut-off events. For 392889/392968 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 67798 event pairs, 2919 based on Foata normal form. 18/12012 useless extension candidates. Maximal degree in co-relation 82594. Up to 11301 conditions per place. [2024-06-20 17:17:30,556 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 235 selfloop transitions, 20 changer transitions 0/274 dead transitions. [2024-06-20 17:17:30,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 274 transitions, 3387 flow [2024-06-20 17:17:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:17:30,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 17:17:30,557 INFO L175 Difference]: Start difference. First operand has 162 places, 236 transitions, 2613 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:17:30,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 274 transitions, 3387 flow [2024-06-20 17:17:31,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 274 transitions, 3317 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:31,024 INFO L231 Difference]: Finished difference. Result has 163 places, 239 transitions, 2672 flow [2024-06-20 17:17:31,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2672, PETRI_PLACES=163, PETRI_TRANSITIONS=239} [2024-06-20 17:17:31,024 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-20 17:17:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 239 transitions, 2672 flow [2024-06-20 17:17:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:31,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:17:31,025 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)] === [2024-06-20 17:17:31,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1415491732, now seen corresponding path program 1 times [2024-06-20 17:17:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794424760] [2024-06-20 17:17:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:34,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794424760] [2024-06-20 17:17:34,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794424760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:34,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:34,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:34,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792389953] [2024-06-20 17:17:34,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:34,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:34,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:34,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:34,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 239 transitions, 2672 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) [2024-06-20 17:17:34,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:34,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:34,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:37,795 INFO L124 PetriNetUnfolderBase]: 9085/12778 cut-off events. [2024-06-20 17:17:37,795 INFO L125 PetriNetUnfolderBase]: For 442362/442374 co-relation queries the response was YES. [2024-06-20 17:17:37,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88931 conditions, 12778 events. 9085/12778 cut-off events. For 442362/442374 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 69738 event pairs, 3070 based on Foata normal form. 10/12779 useless extension candidates. Maximal degree in co-relation 88855. Up to 12254 conditions per place. [2024-06-20 17:17:37,917 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 229 selfloop transitions, 61 changer transitions 0/296 dead transitions. [2024-06-20 17:17:37,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 296 transitions, 3912 flow [2024-06-20 17:17:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 17:17:37,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-20 17:17:37,919 INFO L175 Difference]: Start difference. First operand has 163 places, 239 transitions, 2672 flow. Second operand 7 states and 171 transitions. [2024-06-20 17:17:37,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 296 transitions, 3912 flow [2024-06-20 17:17:38,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 296 transitions, 3819 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:38,290 INFO L231 Difference]: Finished difference. Result has 166 places, 251 transitions, 3008 flow [2024-06-20 17:17:38,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=166, PETRI_TRANSITIONS=251} [2024-06-20 17:17:38,291 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-20 17:17:38,291 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 251 transitions, 3008 flow [2024-06-20 17:17:38,291 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) [2024-06-20 17:17:38,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:38,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:17:38,292 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)] === [2024-06-20 17:17:38,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1410730132, now seen corresponding path program 2 times [2024-06-20 17:17:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:38,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634290228] [2024-06-20 17:17:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:41,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:41,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634290228] [2024-06-20 17:17:41,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634290228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:41,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:41,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981089132] [2024-06-20 17:17:41,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:41,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:41,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 251 transitions, 3008 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) [2024-06-20 17:17:41,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:41,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:41,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:44,945 INFO L124 PetriNetUnfolderBase]: 9123/12847 cut-off events. [2024-06-20 17:17:44,946 INFO L125 PetriNetUnfolderBase]: For 475220/475223 co-relation queries the response was YES. [2024-06-20 17:17:45,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91428 conditions, 12847 events. 9123/12847 cut-off events. For 475220/475223 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70374 event pairs, 3051 based on Foata normal form. 4/12847 useless extension candidates. Maximal degree in co-relation 91351. Up to 12400 conditions per place. [2024-06-20 17:17:45,072 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 251 selfloop transitions, 41 changer transitions 0/298 dead transitions. [2024-06-20 17:17:45,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 298 transitions, 3853 flow [2024-06-20 17:17:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 17:17:45,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-20 17:17:45,074 INFO L175 Difference]: Start difference. First operand has 166 places, 251 transitions, 3008 flow. Second operand 7 states and 163 transitions. [2024-06-20 17:17:45,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 298 transitions, 3853 flow [2024-06-20 17:17:45,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 298 transitions, 3682 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-20 17:17:45,596 INFO L231 Difference]: Finished difference. Result has 171 places, 259 transitions, 3085 flow [2024-06-20 17:17:45,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=171, PETRI_TRANSITIONS=259} [2024-06-20 17:17:45,597 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-20 17:17:45,597 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 259 transitions, 3085 flow [2024-06-20 17:17:45,597 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) [2024-06-20 17:17:45,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:45,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:45,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:17:45,598 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)] === [2024-06-20 17:17:45,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1677067772, now seen corresponding path program 3 times [2024-06-20 17:17:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:45,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372811406] [2024-06-20 17:17:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:45,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:48,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:48,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372811406] [2024-06-20 17:17:48,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372811406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:48,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:48,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:48,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563001633] [2024-06-20 17:17:48,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:48,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:48,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:48,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:48,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 259 transitions, 3085 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) [2024-06-20 17:17:48,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:48,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:48,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:52,323 INFO L124 PetriNetUnfolderBase]: 9142/12877 cut-off events. [2024-06-20 17:17:52,323 INFO L125 PetriNetUnfolderBase]: For 495935/495969 co-relation queries the response was YES. [2024-06-20 17:17:52,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91755 conditions, 12877 events. 9142/12877 cut-off events. For 495935/495969 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70563 event pairs, 3071 based on Foata normal form. 21/12886 useless extension candidates. Maximal degree in co-relation 91676. Up to 12319 conditions per place. [2024-06-20 17:17:52,443 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 232 selfloop transitions, 68 changer transitions 0/306 dead transitions. [2024-06-20 17:17:52,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 306 transitions, 4163 flow [2024-06-20 17:17:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 17:17:52,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-20 17:17:52,445 INFO L175 Difference]: Start difference. First operand has 171 places, 259 transitions, 3085 flow. Second operand 7 states and 167 transitions. [2024-06-20 17:17:52,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 306 transitions, 4163 flow [2024-06-20 17:17:52,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 306 transitions, 4027 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:52,967 INFO L231 Difference]: Finished difference. Result has 173 places, 263 transitions, 3185 flow [2024-06-20 17:17:52,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3185, PETRI_PLACES=173, PETRI_TRANSITIONS=263} [2024-06-20 17:17:52,968 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-20 17:17:52,968 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 263 transitions, 3185 flow [2024-06-20 17:17:52,968 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) [2024-06-20 17:17:52,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:52,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:52,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:17:52,968 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)] === [2024-06-20 17:17:52,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash -208906388, now seen corresponding path program 4 times [2024-06-20 17:17:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:52,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417035535] [2024-06-20 17:17:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417035535] [2024-06-20 17:17:55,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417035535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:55,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:55,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424922066] [2024-06-20 17:17:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:55,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:55,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:17:55,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 263 transitions, 3185 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) [2024-06-20 17:17:55,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:55,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:17:55,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:59,571 INFO L124 PetriNetUnfolderBase]: 9161/12902 cut-off events. [2024-06-20 17:17:59,572 INFO L125 PetriNetUnfolderBase]: For 518134/518168 co-relation queries the response was YES. [2024-06-20 17:17:59,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92779 conditions, 12902 events. 9161/12902 cut-off events. For 518134/518168 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70750 event pairs, 3071 based on Foata normal form. 21/12911 useless extension candidates. Maximal degree in co-relation 92699. Up to 12339 conditions per place. [2024-06-20 17:17:59,730 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 223 selfloop transitions, 74 changer transitions 0/303 dead transitions. [2024-06-20 17:17:59,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 303 transitions, 4117 flow [2024-06-20 17:17:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:17:59,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-20 17:17:59,732 INFO L175 Difference]: Start difference. First operand has 173 places, 263 transitions, 3185 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:17:59,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 303 transitions, 4117 flow [2024-06-20 17:18:00,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 303 transitions, 3853 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:00,308 INFO L231 Difference]: Finished difference. Result has 174 places, 267 transitions, 3176 flow [2024-06-20 17:18:00,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3176, PETRI_PLACES=174, PETRI_TRANSITIONS=267} [2024-06-20 17:18:00,308 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-20 17:18:00,308 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 267 transitions, 3176 flow [2024-06-20 17:18:00,309 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) [2024-06-20 17:18:00,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:00,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:00,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:18:00,309 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)] === [2024-06-20 17:18:00,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash -274783518, now seen corresponding path program 5 times [2024-06-20 17:18:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:00,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610062287] [2024-06-20 17:18:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:03,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:03,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610062287] [2024-06-20 17:18:03,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610062287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:03,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:03,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501559813] [2024-06-20 17:18:03,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:03,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:03,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 267 transitions, 3176 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) [2024-06-20 17:18:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:06,537 INFO L124 PetriNetUnfolderBase]: 9154/12884 cut-off events. [2024-06-20 17:18:06,537 INFO L125 PetriNetUnfolderBase]: For 538068/538087 co-relation queries the response was YES. [2024-06-20 17:18:06,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93062 conditions, 12884 events. 9154/12884 cut-off events. For 538068/538087 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70453 event pairs, 3094 based on Foata normal form. 11/12878 useless extension candidates. Maximal degree in co-relation 92982. Up to 12286 conditions per place. [2024-06-20 17:18:06,675 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 217 selfloop transitions, 80 changer transitions 0/303 dead transitions. [2024-06-20 17:18:06,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 303 transitions, 4020 flow [2024-06-20 17:18:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 17:18:06,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-20 17:18:06,677 INFO L175 Difference]: Start difference. First operand has 174 places, 267 transitions, 3176 flow. Second operand 6 states and 148 transitions. [2024-06-20 17:18:06,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 303 transitions, 4020 flow [2024-06-20 17:18:07,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 303 transitions, 3803 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:07,391 INFO L231 Difference]: Finished difference. Result has 176 places, 267 transitions, 3137 flow [2024-06-20 17:18:07,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3137, PETRI_PLACES=176, PETRI_TRANSITIONS=267} [2024-06-20 17:18:07,391 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-20 17:18:07,392 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 267 transitions, 3137 flow [2024-06-20 17:18:07,392 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) [2024-06-20 17:18:07,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:07,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:07,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:18:07,392 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)] === [2024-06-20 17:18:07,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -304426338, now seen corresponding path program 6 times [2024-06-20 17:18:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:07,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232684851] [2024-06-20 17:18:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:07,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:10,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:10,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232684851] [2024-06-20 17:18:10,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232684851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:10,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:10,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237329129] [2024-06-20 17:18:10,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:10,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:10,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:10,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:10,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 267 transitions, 3137 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) [2024-06-20 17:18:10,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:10,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:10,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:14,503 INFO L124 PetriNetUnfolderBase]: 9147/12879 cut-off events. [2024-06-20 17:18:14,503 INFO L125 PetriNetUnfolderBase]: For 558971/558974 co-relation queries the response was YES. [2024-06-20 17:18:14,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93560 conditions, 12879 events. 9147/12879 cut-off events. For 558971/558974 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70466 event pairs, 3051 based on Foata normal form. 4/12879 useless extension candidates. Maximal degree in co-relation 93479. Up to 12279 conditions per place. [2024-06-20 17:18:14,624 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 235 selfloop transitions, 82 changer transitions 0/323 dead transitions. [2024-06-20 17:18:14,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 323 transitions, 3945 flow [2024-06-20 17:18:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 17:18:14,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-20 17:18:14,626 INFO L175 Difference]: Start difference. First operand has 176 places, 267 transitions, 3137 flow. Second operand 8 states and 196 transitions. [2024-06-20 17:18:14,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 323 transitions, 3945 flow [2024-06-20 17:18:15,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 323 transitions, 3663 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:15,329 INFO L231 Difference]: Finished difference. Result has 177 places, 267 transitions, 3062 flow [2024-06-20 17:18:15,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3062, PETRI_PLACES=177, PETRI_TRANSITIONS=267} [2024-06-20 17:18:15,329 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-06-20 17:18:15,329 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 267 transitions, 3062 flow [2024-06-20 17:18:15,329 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) [2024-06-20 17:18:15,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:15,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:15,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:18:15,330 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)] === [2024-06-20 17:18:15,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash -211755412, now seen corresponding path program 1 times [2024-06-20 17:18:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:15,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643871546] [2024-06-20 17:18:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:17,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:17,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643871546] [2024-06-20 17:18:17,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643871546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:17,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:17,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58382184] [2024-06-20 17:18:17,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:17,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:17,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:17,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 267 transitions, 3062 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) [2024-06-20 17:18:17,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:17,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:17,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:20,816 INFO L124 PetriNetUnfolderBase]: 9179/12921 cut-off events. [2024-06-20 17:18:20,816 INFO L125 PetriNetUnfolderBase]: For 556448/556451 co-relation queries the response was YES. [2024-06-20 17:18:20,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93954 conditions, 12921 events. 9179/12921 cut-off events. For 556448/556451 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70678 event pairs, 2892 based on Foata normal form. 6/12922 useless extension candidates. Maximal degree in co-relation 93873. Up to 12490 conditions per place. [2024-06-20 17:18:20,950 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 278 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2024-06-20 17:18:20,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 313 transitions, 4108 flow [2024-06-20 17:18:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 17:18:20,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-20 17:18:20,952 INFO L175 Difference]: Start difference. First operand has 177 places, 267 transitions, 3062 flow. Second operand 7 states and 163 transitions. [2024-06-20 17:18:20,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 313 transitions, 4108 flow [2024-06-20 17:18:21,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 313 transitions, 3914 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:18:21,487 INFO L231 Difference]: Finished difference. Result has 176 places, 273 transitions, 3128 flow [2024-06-20 17:18:21,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3128, PETRI_PLACES=176, PETRI_TRANSITIONS=273} [2024-06-20 17:18:21,488 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-20 17:18:21,488 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 273 transitions, 3128 flow [2024-06-20 17:18:21,488 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) [2024-06-20 17:18:21,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:21,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:21,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:18:21,488 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)] === [2024-06-20 17:18:21,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:21,489 INFO L85 PathProgramCache]: Analyzing trace with hash -208898452, now seen corresponding path program 2 times [2024-06-20 17:18:21,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:21,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225045575] [2024-06-20 17:18:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:21,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225045575] [2024-06-20 17:18:23,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225045575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:23,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:23,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904072119] [2024-06-20 17:18:23,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:23,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:23,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:23,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 273 transitions, 3128 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) [2024-06-20 17:18:23,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:23,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:23,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:27,319 INFO L124 PetriNetUnfolderBase]: 9211/12966 cut-off events. [2024-06-20 17:18:27,319 INFO L125 PetriNetUnfolderBase]: For 543363/543366 co-relation queries the response was YES. [2024-06-20 17:18:27,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94246 conditions, 12966 events. 9211/12966 cut-off events. For 543363/543366 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 71058 event pairs, 3042 based on Foata normal form. 6/12967 useless extension candidates. Maximal degree in co-relation 94165. Up to 12612 conditions per place. [2024-06-20 17:18:27,467 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 279 selfloop transitions, 24 changer transitions 0/309 dead transitions. [2024-06-20 17:18:27,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 309 transitions, 3924 flow [2024-06-20 17:18:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-20 17:18:27,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:18:27,469 INFO L175 Difference]: Start difference. First operand has 176 places, 273 transitions, 3128 flow. Second operand 7 states and 156 transitions. [2024-06-20 17:18:27,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 309 transitions, 3924 flow [2024-06-20 17:18:28,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 309 transitions, 3753 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:28,273 INFO L231 Difference]: Finished difference. Result has 180 places, 276 transitions, 3115 flow [2024-06-20 17:18:28,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2989, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3115, PETRI_PLACES=180, PETRI_TRANSITIONS=276} [2024-06-20 17:18:28,278 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-20 17:18:28,279 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 276 transitions, 3115 flow [2024-06-20 17:18:28,279 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) [2024-06-20 17:18:28,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:28,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:18:28,279 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)] === [2024-06-20 17:18:28,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1160855740, now seen corresponding path program 3 times [2024-06-20 17:18:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:28,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945835646] [2024-06-20 17:18:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945835646] [2024-06-20 17:18:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945835646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:30,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:30,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626064935] [2024-06-20 17:18:30,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:30,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:30,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 276 transitions, 3115 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) [2024-06-20 17:18:30,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:30,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:30,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:34,023 INFO L124 PetriNetUnfolderBase]: 9199/12949 cut-off events. [2024-06-20 17:18:34,023 INFO L125 PetriNetUnfolderBase]: For 562423/562426 co-relation queries the response was YES. [2024-06-20 17:18:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94241 conditions, 12949 events. 9199/12949 cut-off events. For 562423/562426 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 70871 event pairs, 2890 based on Foata normal form. 6/12950 useless extension candidates. Maximal degree in co-relation 94158. Up to 12569 conditions per place. [2024-06-20 17:18:34,158 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 279 selfloop transitions, 23 changer transitions 0/308 dead transitions. [2024-06-20 17:18:34,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 308 transitions, 3811 flow [2024-06-20 17:18:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 17:18:34,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-20 17:18:34,160 INFO L175 Difference]: Start difference. First operand has 180 places, 276 transitions, 3115 flow. Second operand 6 states and 142 transitions. [2024-06-20 17:18:34,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 308 transitions, 3811 flow [2024-06-20 17:18:34,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 308 transitions, 3667 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:34,868 INFO L231 Difference]: Finished difference. Result has 181 places, 276 transitions, 3029 flow [2024-06-20 17:18:34,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3029, PETRI_PLACES=181, PETRI_TRANSITIONS=276} [2024-06-20 17:18:34,869 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-20 17:18:34,869 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 276 transitions, 3029 flow [2024-06-20 17:18:34,869 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) [2024-06-20 17:18:34,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:34,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:34,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:18:34,870 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)] === [2024-06-20 17:18:34,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:34,870 INFO L85 PathProgramCache]: Analyzing trace with hash -853305708, now seen corresponding path program 1 times [2024-06-20 17:18:34,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:34,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168974017] [2024-06-20 17:18:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:36,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:36,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168974017] [2024-06-20 17:18:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168974017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:36,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:36,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974762170] [2024-06-20 17:18:36,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:36,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:36,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:36,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:36,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 17:18:36,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 276 transitions, 3029 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:36,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:36,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 17:18:36,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:40,051 INFO L124 PetriNetUnfolderBase]: 8265/11962 cut-off events. [2024-06-20 17:18:40,051 INFO L125 PetriNetUnfolderBase]: For 639330/640646 co-relation queries the response was YES. [2024-06-20 17:18:40,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90236 conditions, 11962 events. 8265/11962 cut-off events. For 639330/640646 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 70814 event pairs, 3876 based on Foata normal form. 130/11892 useless extension candidates. Maximal degree in co-relation 90152. Up to 11052 conditions per place. [2024-06-20 17:18:40,191 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 221 selfloop transitions, 20 changer transitions 0/295 dead transitions. [2024-06-20 17:18:40,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 295 transitions, 3583 flow [2024-06-20 17:18:40,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-20 17:18:40,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-20 17:18:40,193 INFO L175 Difference]: Start difference. First operand has 181 places, 276 transitions, 3029 flow. Second operand 6 states and 135 transitions. [2024-06-20 17:18:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 295 transitions, 3583 flow [2024-06-20 17:18:41,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 295 transitions, 3515 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:41,117 INFO L231 Difference]: Finished difference. Result has 183 places, 278 transitions, 3044 flow [2024-06-20 17:18:41,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3044, PETRI_PLACES=183, PETRI_TRANSITIONS=278} [2024-06-20 17:18:41,118 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 128 predicate places. [2024-06-20 17:18:41,118 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 278 transitions, 3044 flow [2024-06-20 17:18:41,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:41,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:41,118 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] [2024-06-20 17:18:41,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:18:41,119 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)] === [2024-06-20 17:18:41,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1422986116, now seen corresponding path program 1 times [2024-06-20 17:18:41,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:41,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241768524] [2024-06-20 17:18:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:41,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:44,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:44,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241768524] [2024-06-20 17:18:44,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241768524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:44,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:44,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:44,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850948872] [2024-06-20 17:18:44,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:44,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:44,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:44,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:44,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:44,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:44,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 278 transitions, 3044 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) [2024-06-20 17:18:44,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:44,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:44,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:48,469 INFO L124 PetriNetUnfolderBase]: 9162/12878 cut-off events. [2024-06-20 17:18:48,469 INFO L125 PetriNetUnfolderBase]: For 593387/593403 co-relation queries the response was YES. [2024-06-20 17:18:48,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95223 conditions, 12878 events. 9162/12878 cut-off events. For 593387/593403 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 70718 event pairs, 2996 based on Foata normal form. 14/12883 useless extension candidates. Maximal degree in co-relation 95137. Up to 12094 conditions per place. [2024-06-20 17:18:48,621 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 236 selfloop transitions, 108 changer transitions 0/350 dead transitions. [2024-06-20 17:18:48,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 350 transitions, 4750 flow [2024-06-20 17:18:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 17:18:48,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-20 17:18:48,637 INFO L175 Difference]: Start difference. First operand has 183 places, 278 transitions, 3044 flow. Second operand 8 states and 199 transitions. [2024-06-20 17:18:48,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 350 transitions, 4750 flow [2024-06-20 17:18:49,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 350 transitions, 4713 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:49,441 INFO L231 Difference]: Finished difference. Result has 188 places, 294 transitions, 3656 flow [2024-06-20 17:18:49,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3656, PETRI_PLACES=188, PETRI_TRANSITIONS=294} [2024-06-20 17:18:49,442 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 133 predicate places. [2024-06-20 17:18:49,442 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 294 transitions, 3656 flow [2024-06-20 17:18:49,442 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) [2024-06-20 17:18:49,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:49,442 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] [2024-06-20 17:18:49,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:18:49,442 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)] === [2024-06-20 17:18:49,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:49,443 INFO L85 PathProgramCache]: Analyzing trace with hash 32510242, now seen corresponding path program 2 times [2024-06-20 17:18:49,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:49,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934597894] [2024-06-20 17:18:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:49,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:51,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:51,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934597894] [2024-06-20 17:18:51,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934597894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:51,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:51,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002465711] [2024-06-20 17:18:51,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:51,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:51,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:18:51,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 294 transitions, 3656 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) [2024-06-20 17:18:51,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:51,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:18:51,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:55,770 INFO L124 PetriNetUnfolderBase]: 9376/13245 cut-off events. [2024-06-20 17:18:55,770 INFO L125 PetriNetUnfolderBase]: For 650514/650533 co-relation queries the response was YES. [2024-06-20 17:18:55,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100470 conditions, 13245 events. 9376/13245 cut-off events. For 650514/650533 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 73864 event pairs, 3731 based on Foata normal form. 20/13261 useless extension candidates. Maximal degree in co-relation 100383. Up to 12608 conditions per place. [2024-06-20 17:18:55,933 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 320 selfloop transitions, 96 changer transitions 0/422 dead transitions. [2024-06-20 17:18:55,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 422 transitions, 5742 flow [2024-06-20 17:18:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:18:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:18:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-20 17:18:55,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47027972027972026 [2024-06-20 17:18:55,935 INFO L175 Difference]: Start difference. First operand has 188 places, 294 transitions, 3656 flow. Second operand 11 states and 269 transitions. [2024-06-20 17:18:55,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 422 transitions, 5742 flow [2024-06-20 17:18:57,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 422 transitions, 5498 flow, removed 112 selfloop flow, removed 2 redundant places. [2024-06-20 17:18:57,057 INFO L231 Difference]: Finished difference. Result has 200 places, 341 transitions, 4388 flow [2024-06-20 17:18:57,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4388, PETRI_PLACES=200, PETRI_TRANSITIONS=341} [2024-06-20 17:18:57,058 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 145 predicate places. [2024-06-20 17:18:57,058 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 341 transitions, 4388 flow [2024-06-20 17:18:57,058 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) [2024-06-20 17:18:57,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:57,059 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] [2024-06-20 17:18:57,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:18:57,059 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)] === [2024-06-20 17:18:57,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1389960764, now seen corresponding path program 3 times [2024-06-20 17:18:57,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:57,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881551681] [2024-06-20 17:18:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:57,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:59,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881551681] [2024-06-20 17:18:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881551681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:59,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:59,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:59,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996519699] [2024-06-20 17:18:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:00,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:19:00,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 341 transitions, 4388 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) [2024-06-20 17:19:00,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:00,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:19:00,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:03,797 INFO L124 PetriNetUnfolderBase]: 9705/13705 cut-off events. [2024-06-20 17:19:03,797 INFO L125 PetriNetUnfolderBase]: For 673100/673122 co-relation queries the response was YES. [2024-06-20 17:19:03,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105826 conditions, 13705 events. 9705/13705 cut-off events. For 673100/673122 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 76127 event pairs, 2990 based on Foata normal form. 24/13725 useless extension candidates. Maximal degree in co-relation 105734. Up to 13008 conditions per place. [2024-06-20 17:19:03,950 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 351 selfloop transitions, 114 changer transitions 0/471 dead transitions. [2024-06-20 17:19:03,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 471 transitions, 6740 flow [2024-06-20 17:19:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 17:19:03,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-20 17:19:03,952 INFO L175 Difference]: Start difference. First operand has 200 places, 341 transitions, 4388 flow. Second operand 9 states and 219 transitions. [2024-06-20 17:19:03,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 471 transitions, 6740 flow [2024-06-20 17:19:05,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 471 transitions, 6203 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:05,201 INFO L231 Difference]: Finished difference. Result has 206 places, 410 transitions, 5479 flow [2024-06-20 17:19:05,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5479, PETRI_PLACES=206, PETRI_TRANSITIONS=410} [2024-06-20 17:19:05,201 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 151 predicate places. [2024-06-20 17:19:05,201 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 410 transitions, 5479 flow [2024-06-20 17:19:05,202 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) [2024-06-20 17:19:05,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:05,202 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] [2024-06-20 17:19:05,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:19:05,202 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)] === [2024-06-20 17:19:05,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1385223344, now seen corresponding path program 4 times [2024-06-20 17:19:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:05,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921154528] [2024-06-20 17:19:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:05,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921154528] [2024-06-20 17:19:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921154528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:09,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597699176] [2024-06-20 17:19:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:09,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:19:09,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 410 transitions, 5479 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:09,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:09,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:19:09,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:14,298 INFO L124 PetriNetUnfolderBase]: 10054/14199 cut-off events. [2024-06-20 17:19:14,298 INFO L125 PetriNetUnfolderBase]: For 707707/707723 co-relation queries the response was YES. [2024-06-20 17:19:14,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109679 conditions, 14199 events. 10054/14199 cut-off events. For 707707/707723 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 79289 event pairs, 3026 based on Foata normal form. 14/14204 useless extension candidates. Maximal degree in co-relation 109583. Up to 12848 conditions per place. [2024-06-20 17:19:14,446 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 265 selfloop transitions, 276 changer transitions 0/547 dead transitions. [2024-06-20 17:19:14,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 547 transitions, 8043 flow [2024-06-20 17:19:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-20 17:19:14,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47649572649572647 [2024-06-20 17:19:14,448 INFO L175 Difference]: Start difference. First operand has 206 places, 410 transitions, 5479 flow. Second operand 9 states and 223 transitions. [2024-06-20 17:19:14,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 547 transitions, 8043 flow [2024-06-20 17:19:15,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 547 transitions, 7810 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:15,368 INFO L231 Difference]: Finished difference. Result has 215 places, 476 transitions, 6708 flow [2024-06-20 17:19:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6708, PETRI_PLACES=215, PETRI_TRANSITIONS=476} [2024-06-20 17:19:15,369 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-20 17:19:15,369 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 476 transitions, 6708 flow [2024-06-20 17:19:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:15,369 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] [2024-06-20 17:19:15,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:19:15,369 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)] === [2024-06-20 17:19:15,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash -173292371, now seen corresponding path program 1 times [2024-06-20 17:19:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:15,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475591361] [2024-06-20 17:19:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:15,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:18,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:18,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475591361] [2024-06-20 17:19:18,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475591361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:18,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:18,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:18,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931542482] [2024-06-20 17:19:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:18,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:18,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:18,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:19:18,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 476 transitions, 6708 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:18,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:18,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:19:18,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:24,389 INFO L124 PetriNetUnfolderBase]: 10916/15339 cut-off events. [2024-06-20 17:19:24,390 INFO L125 PetriNetUnfolderBase]: For 814711/814740 co-relation queries the response was YES. [2024-06-20 17:19:24,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121968 conditions, 15339 events. 10916/15339 cut-off events. For 814711/814740 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 85947 event pairs, 3925 based on Foata normal form. 32/15362 useless extension candidates. Maximal degree in co-relation 121868. Up to 13672 conditions per place. [2024-06-20 17:19:24,572 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 466 selfloop transitions, 163 changer transitions 0/635 dead transitions. [2024-06-20 17:19:24,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 635 transitions, 10044 flow [2024-06-20 17:19:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:19:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:19:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 315 transitions. [2024-06-20 17:19:24,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46597633136094674 [2024-06-20 17:19:24,574 INFO L175 Difference]: Start difference. First operand has 215 places, 476 transitions, 6708 flow. Second operand 13 states and 315 transitions. [2024-06-20 17:19:24,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 635 transitions, 10044 flow [2024-06-20 17:19:26,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 635 transitions, 9710 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:26,062 INFO L231 Difference]: Finished difference. Result has 229 places, 529 transitions, 7525 flow [2024-06-20 17:19:26,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6374, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7525, PETRI_PLACES=229, PETRI_TRANSITIONS=529} [2024-06-20 17:19:26,063 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2024-06-20 17:19:26,063 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 529 transitions, 7525 flow [2024-06-20 17:19:26,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:26,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:26,063 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] [2024-06-20 17:19:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:19:26,063 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)] === [2024-06-20 17:19:26,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1802228866, now seen corresponding path program 5 times [2024-06-20 17:19:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735515145] [2024-06-20 17:19:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:29,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:29,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735515145] [2024-06-20 17:19:29,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735515145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:29,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:29,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753824346] [2024-06-20 17:19:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:29,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:29,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:19:29,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 529 transitions, 7525 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) [2024-06-20 17:19:29,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:29,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:19:29,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:33,867 INFO L124 PetriNetUnfolderBase]: 11004/15467 cut-off events. [2024-06-20 17:19:33,867 INFO L125 PetriNetUnfolderBase]: For 857763/857766 co-relation queries the response was YES. [2024-06-20 17:19:33,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127835 conditions, 15467 events. 11004/15467 cut-off events. For 857763/857766 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 86279 event pairs, 3117 based on Foata normal form. 4/15467 useless extension candidates. Maximal degree in co-relation 127730. Up to 14729 conditions per place. [2024-06-20 17:19:34,070 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 492 selfloop transitions, 110 changer transitions 0/608 dead transitions. [2024-06-20 17:19:34,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 608 transitions, 9439 flow [2024-06-20 17:19:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 17:19:34,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465811965811966 [2024-06-20 17:19:34,072 INFO L175 Difference]: Start difference. First operand has 229 places, 529 transitions, 7525 flow. Second operand 9 states and 209 transitions. [2024-06-20 17:19:34,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 608 transitions, 9439 flow [2024-06-20 17:19:35,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 608 transitions, 9162 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:35,424 INFO L231 Difference]: Finished difference. Result has 236 places, 557 transitions, 8065 flow [2024-06-20 17:19:35,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7256, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8065, PETRI_PLACES=236, PETRI_TRANSITIONS=557} [2024-06-20 17:19:35,425 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-20 17:19:35,425 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 557 transitions, 8065 flow [2024-06-20 17:19:35,425 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) [2024-06-20 17:19:35,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:35,426 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] [2024-06-20 17:19:35,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:19:35,426 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)] === [2024-06-20 17:19:35,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:35,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1160034477, now seen corresponding path program 2 times [2024-06-20 17:19:35,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:35,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731446799] [2024-06-20 17:19:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:35,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:38,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:38,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731446799] [2024-06-20 17:19:38,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731446799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:38,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:38,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:38,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181434240] [2024-06-20 17:19:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:38,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:38,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:38,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:19:38,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 557 transitions, 8065 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) [2024-06-20 17:19:38,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:38,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:19:38,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:44,308 INFO L124 PetriNetUnfolderBase]: 12028/16827 cut-off events. [2024-06-20 17:19:44,308 INFO L125 PetriNetUnfolderBase]: For 961453/961456 co-relation queries the response was YES. [2024-06-20 17:19:44,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139516 conditions, 16827 events. 12028/16827 cut-off events. For 961453/961456 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 93855 event pairs, 3144 based on Foata normal form. 18/16841 useless extension candidates. Maximal degree in co-relation 139409. Up to 14660 conditions per place. [2024-06-20 17:19:44,542 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 511 selfloop transitions, 199 changer transitions 0/716 dead transitions. [2024-06-20 17:19:44,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 716 transitions, 11384 flow [2024-06-20 17:19:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:19:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:19:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 336 transitions. [2024-06-20 17:19:44,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 17:19:44,544 INFO L175 Difference]: Start difference. First operand has 236 places, 557 transitions, 8065 flow. Second operand 14 states and 336 transitions. [2024-06-20 17:19:44,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 716 transitions, 11384 flow [2024-06-20 17:19:46,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 716 transitions, 11194 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:46,683 INFO L231 Difference]: Finished difference. Result has 251 places, 619 transitions, 9373 flow [2024-06-20 17:19:46,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7875, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9373, PETRI_PLACES=251, PETRI_TRANSITIONS=619} [2024-06-20 17:19:46,684 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-06-20 17:19:46,684 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 619 transitions, 9373 flow [2024-06-20 17:19:46,684 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) [2024-06-20 17:19:46,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:46,684 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] [2024-06-20 17:19:46,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:19:46,684 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:19:46,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:46,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1160241867, now seen corresponding path program 3 times [2024-06-20 17:19:46,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:46,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378256868] [2024-06-20 17:19:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:46,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:49,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:49,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378256868] [2024-06-20 17:19:49,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378256868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:49,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:49,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:49,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192077968] [2024-06-20 17:19:49,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:49,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:49,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:49,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:49,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:49,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-20 17:19:49,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 619 transitions, 9373 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) [2024-06-20 17:19:49,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:49,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-20 17:19:49,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:55,608 INFO L124 PetriNetUnfolderBase]: 11992/16780 cut-off events. [2024-06-20 17:19:55,608 INFO L125 PetriNetUnfolderBase]: For 1012365/1012368 co-relation queries the response was YES. [2024-06-20 17:19:55,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144716 conditions, 16780 events. 11992/16780 cut-off events. For 1012365/1012368 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 93693 event pairs, 3166 based on Foata normal form. 18/16794 useless extension candidates. Maximal degree in co-relation 144603. Up to 14640 conditions per place. [2024-06-20 17:19:55,834 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 501 selfloop transitions, 196 changer transitions 0/703 dead transitions. [2024-06-20 17:19:55,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 703 transitions, 11554 flow [2024-06-20 17:19:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:19:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:19:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 293 transitions. [2024-06-20 17:19:55,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46955128205128205 [2024-06-20 17:19:55,836 INFO L175 Difference]: Start difference. First operand has 251 places, 619 transitions, 9373 flow. Second operand 12 states and 293 transitions. [2024-06-20 17:19:55,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 703 transitions, 11554 flow [2024-06-20 17:19:57,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 703 transitions, 11204 flow, removed 155 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:57,892 INFO L231 Difference]: Finished difference. Result has 260 places, 619 transitions, 9434 flow [2024-06-20 17:19:57,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=9023, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9434, PETRI_PLACES=260, PETRI_TRANSITIONS=619} [2024-06-20 17:19:57,892 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2024-06-20 17:19:57,892 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 619 transitions, 9434 flow [2024-06-20 17:19:57,893 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) [2024-06-20 17:19:57,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:57,893 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] [2024-06-20 17:19:57,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:19:57,893 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:19:57,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1160026541, now seen corresponding path program 1 times [2024-06-20 17:19:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:57,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997644268] [2024-06-20 17:19:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:57,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat