./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.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/rfi006_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/rfi006_rmo.i ./goblint.2024-05-21_14-57-05.files/protection/rfi006_rmo.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-cde23df-m [2024-06-14 12:42:49,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:42:49,054 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:42:49,057 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:42:49,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:42:49,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:42:49,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:42:49,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:42:49,079 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:42:49,079 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:42:49,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:42:49,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:42:49,080 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:42:49,080 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:42:49,080 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:42:49,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:42:49,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:42:49,081 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:42:49,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:42:49,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:42:49,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:42:49,082 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:42:49,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:42:49,083 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:42:49,083 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:42:49,083 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:42:49,083 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:42:49,084 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:42:49,084 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:42:49,084 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:42:49,084 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:42:49,085 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:42:49,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:42:49,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:42:49,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:42:49,085 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:42:49,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:42:49,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:42:49,086 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:42:49,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:42:49,087 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:42:49,087 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:42:49,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:42:49,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:42:49,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:42:49,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:42:49,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:42:49,332 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:42:49,332 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:42:49,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-14 12:42:50,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:42:50,626 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:42:50,630 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-14 12:42:50,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8323142/2592ecd0df5748f6ac72fe57682aea03/FLAG85fc16b73 [2024-06-14 12:42:50,651 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8323142/2592ecd0df5748f6ac72fe57682aea03 [2024-06-14 12:42:50,653 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:42:50,653 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:42:50,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi006_rmo.yml/witness.yml [2024-06-14 12:42:50,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:42:50,900 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:42:50,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:42:50,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:42:50,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:42:50,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:42:50" (1/2) ... [2024-06-14 12:42:50,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75eec350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:50, skipping insertion in model container [2024-06-14 12:42:50,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:42:50" (1/2) ... [2024-06-14 12:42:50,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50928844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:42:50, skipping insertion in model container [2024-06-14 12:42:50,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:50" (2/2) ... [2024-06-14 12:42:50,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75eec350 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:50, skipping insertion in model container [2024-06-14 12:42:50,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:50" (2/2) ... [2024-06-14 12:42:50,907 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:42:51,007 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:42:51,008 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & x) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:42:51,008 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & x) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:42:51,009 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & x) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:42:51,009 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:42:51,009 INFO L106 edCorrectnessWitness]: ghost_update [L848-L848] multithreaded = 1; [2024-06-14 12:42:51,047 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:42:51,309 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:42:51,327 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:42:51,437 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:42:51,468 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:42:51,474 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51 WrapperNode [2024-06-14 12:42:51,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:42:51,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:42:51,476 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:42:51,476 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:42:51,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,541 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-14 12:42:51,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:42:51,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:42:51,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:42:51,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:42:51,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,569 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,649 INFO L175 MemorySlicer]: Split 45 memory accesses to 2 slices as follows [2, 43]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-14 12:42:51,649 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,649 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,680 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:42:51,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:42:51,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:42:51,681 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:42:51,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (1/1) ... [2024-06-14 12:42:51,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:42:51,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:42:51,733 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) [2024-06-14 12:42:51,753 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 [2024-06-14 12:42:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 12:42:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 12:42:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 12:42:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 12:42:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:42:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:42:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:42:51,778 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:42:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:42:51,778 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:42:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:42:51,778 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:42:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:42:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 12:42:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:42:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:42:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:42:51,780 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:42:52,015 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:42:52,018 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:42:52,477 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:42:52,480 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:42:52,936 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:42:52,936 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:42:52,937 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:42:52 BoogieIcfgContainer [2024-06-14 12:42:52,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:42:52,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:42:52,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:42:52,941 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:42:52,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:42:50" (1/4) ... [2024-06-14 12:42:52,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fa9319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:42:52, skipping insertion in model container [2024-06-14 12:42:52,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:42:50" (2/4) ... [2024-06-14 12:42:52,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fa9319 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:42:52, skipping insertion in model container [2024-06-14 12:42:52,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:42:51" (3/4) ... [2024-06-14 12:42:52,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fa9319 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:42:52, skipping insertion in model container [2024-06-14 12:42:52,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:42:52" (4/4) ... [2024-06-14 12:42:52,944 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_rmo.i [2024-06-14 12:42:52,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:42:52,958 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:42:52,958 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:42:53,013 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:42:53,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:42:53,079 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:42:53,079 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:42:53,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:42:53,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:42:53,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:42:53,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:42:53,102 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;@2f46949f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:42:53,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:42:53,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:42:53,107 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:42:53,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:42:53,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:53,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:42:53,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:53,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash 755000114, now seen corresponding path program 1 times [2024-06-14 12:42:53,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:53,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124946056] [2024-06-14 12:42:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:53,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:54,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:54,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124946056] [2024-06-14 12:42:54,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124946056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:54,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:54,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:42:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844651182] [2024-06-14 12:42:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:54,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:42:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:42:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:42:54,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:42:54,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:54,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:54,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:42:54,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:55,392 INFO L124 PetriNetUnfolderBase]: 990/1588 cut-off events. [2024-06-14 12:42:55,392 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 12:42:55,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 1588 events. 990/1588 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7715 event pairs, 650 based on Foata normal form. 1/1555 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-14 12:42:55,406 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 12:42:55,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-14 12:42:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:42:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:42:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-14 12:42:55,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-14 12:42:55,416 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-14 12:42:55,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-14 12:42:55,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:55,421 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:42:55,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:42:55,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:42:55,426 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:42:55,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:55,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:55,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:55,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:42:55,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:55,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash -294325711, now seen corresponding path program 1 times [2024-06-14 12:42:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:55,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497722325] [2024-06-14 12:42:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:57,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497722325] [2024-06-14 12:42:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497722325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:57,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:57,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:42:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469853212] [2024-06-14 12:42:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:57,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:42:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:42:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:42:57,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:42:57,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2024-06-14 12:42:57,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:57,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:42:57,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:58,312 INFO L124 PetriNetUnfolderBase]: 984/1579 cut-off events. [2024-06-14 12:42:58,312 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-14 12:42:58,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3590 conditions, 1579 events. 984/1579 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7691 event pairs, 540 based on Foata normal form. 3/1577 useless extension candidates. Maximal degree in co-relation 3575. Up to 1475 conditions per place. [2024-06-14 12:42:58,319 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 12:42:58,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 262 flow [2024-06-14 12:42:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:42:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:42:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-14 12:42:58,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2024-06-14 12:42:58,321 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 91 transitions. [2024-06-14 12:42:58,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 262 flow [2024-06-14 12:42:58,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:42:58,323 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:42:58,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:42:58,323 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:42:58,324 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:42:58,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2024-06-14 12:42:58,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:58,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:58,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:42:58,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:58,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:58,325 INFO L85 PathProgramCache]: Analyzing trace with hash -534161208, now seen corresponding path program 1 times [2024-06-14 12:42:58,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:58,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441941952] [2024-06-14 12:42:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:58,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:00,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:00,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441941952] [2024-06-14 12:43:00,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441941952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:00,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:00,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:43:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292090907] [2024-06-14 12:43:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:00,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:43:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:43:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:43:00,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:00,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:00,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:00,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:00,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:01,369 INFO L124 PetriNetUnfolderBase]: 1209/1892 cut-off events. [2024-06-14 12:43:01,369 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-14 12:43:01,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 1892 events. 1209/1892 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9055 event pairs, 475 based on Foata normal form. 5/1895 useless extension candidates. Maximal degree in co-relation 4784. Up to 1726 conditions per place. [2024-06-14 12:43:01,378 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 16 changer transitions 0/82 dead transitions. [2024-06-14 12:43:01,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 82 transitions, 426 flow [2024-06-14 12:43:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:43:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:43:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 12:43:01,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395348837209303 [2024-06-14 12:43:01,381 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 116 transitions. [2024-06-14 12:43:01,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 82 transitions, 426 flow [2024-06-14 12:43:01,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 412 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:43:01,384 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-14 12:43:01,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-14 12:43:01,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:43:01,385 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-14 12:43:01,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:01,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:01,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:01,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:43:01,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:01,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2067195367, now seen corresponding path program 1 times [2024-06-14 12:43:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:01,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275551216] [2024-06-14 12:43:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275551216] [2024-06-14 12:43:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275551216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:03,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:03,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:43:03,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890682363] [2024-06-14 12:43:03,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:03,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:43:03,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:03,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:43:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:43:03,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:03,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2024-06-14 12:43:03,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:03,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:03,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:04,587 INFO L124 PetriNetUnfolderBase]: 1224/1917 cut-off events. [2024-06-14 12:43:04,587 INFO L125 PetriNetUnfolderBase]: For 2353/2355 co-relation queries the response was YES. [2024-06-14 12:43:04,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5770 conditions, 1917 events. 1224/1917 cut-off events. For 2353/2355 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9198 event pairs, 330 based on Foata normal form. 12/1927 useless extension candidates. Maximal degree in co-relation 5750. Up to 1687 conditions per place. [2024-06-14 12:43:04,596 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-14 12:43:04,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 533 flow [2024-06-14 12:43:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 12:43:04,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-14 12:43:04,602 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 132 transitions. [2024-06-14 12:43:04,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 533 flow [2024-06-14 12:43:04,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 525 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:43:04,607 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-14 12:43:04,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-14 12:43:04,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-14 12:43:04,609 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-14 12:43:04,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2024-06-14 12:43:04,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:04,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:04,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:43:04,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:04,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -180730613, now seen corresponding path program 1 times [2024-06-14 12:43:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479147298] [2024-06-14 12:43:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479147298] [2024-06-14 12:43:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479147298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:06,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:06,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:43:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077598810] [2024-06-14 12:43:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:06,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:43:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:43:06,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:43:06,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:06,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:06,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:06,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:06,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:06,953 INFO L124 PetriNetUnfolderBase]: 1219/1907 cut-off events. [2024-06-14 12:43:06,953 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2024-06-14 12:43:06,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6273 conditions, 1907 events. 1219/1907 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9128 event pairs, 468 based on Foata normal form. 2/1906 useless extension candidates. Maximal degree in co-relation 6250. Up to 1831 conditions per place. [2024-06-14 12:43:06,968 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 54 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-14 12:43:06,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 453 flow [2024-06-14 12:43:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:43:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:43:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:43:06,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:43:06,973 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:43:06,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 453 flow [2024-06-14 12:43:06,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 403 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:06,985 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 269 flow [2024-06-14 12:43:06,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 12:43:06,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:43:06,987 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 269 flow [2024-06-14 12:43:06,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:06,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:06,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:06,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:43:06,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:06,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1328927750, now seen corresponding path program 1 times [2024-06-14 12:43:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:06,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145550506] [2024-06-14 12:43:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:06,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:08,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:08,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145550506] [2024-06-14 12:43:08,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145550506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:08,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:08,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793424295] [2024-06-14 12:43:08,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:08,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:08,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:08,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:08,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:08,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:09,721 INFO L124 PetriNetUnfolderBase]: 1209/1895 cut-off events. [2024-06-14 12:43:09,721 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-14 12:43:09,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6210 conditions, 1895 events. 1209/1895 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9006 event pairs, 438 based on Foata normal form. 4/1899 useless extension candidates. Maximal degree in co-relation 6185. Up to 1795 conditions per place. [2024-06-14 12:43:09,730 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-14 12:43:09,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 477 flow [2024-06-14 12:43:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:43:09,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 12:43:09,731 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 269 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:43:09,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 477 flow [2024-06-14 12:43:09,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 455 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:09,735 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 301 flow [2024-06-14 12:43:09,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-14 12:43:09,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 12:43:09,736 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 301 flow [2024-06-14 12:43:09,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:09,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:09,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:09,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:43:09,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:09,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1747192552, now seen corresponding path program 1 times [2024-06-14 12:43:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042784669] [2024-06-14 12:43:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:12,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042784669] [2024-06-14 12:43:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042784669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:12,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:12,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:12,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848736412] [2024-06-14 12:43:12,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:12,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:12,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:12,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:12,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:12,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:13,008 INFO L124 PetriNetUnfolderBase]: 1217/1906 cut-off events. [2024-06-14 12:43:13,009 INFO L125 PetriNetUnfolderBase]: For 5207/5211 co-relation queries the response was YES. [2024-06-14 12:43:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6695 conditions, 1906 events. 1217/1906 cut-off events. For 5207/5211 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9124 event pairs, 449 based on Foata normal form. 8/1914 useless extension candidates. Maximal degree in co-relation 6670. Up to 1737 conditions per place. [2024-06-14 12:43:13,020 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-14 12:43:13,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 565 flow [2024-06-14 12:43:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 12:43:13,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:43:13,022 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 301 flow. Second operand 6 states and 116 transitions. [2024-06-14 12:43:13,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 565 flow [2024-06-14 12:43:13,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 535 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:13,026 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-06-14 12:43:13,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-14 12:43:13,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 12:43:13,027 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-06-14 12:43:13,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:13,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:13,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:13,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:43:13,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:13,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1883381814, now seen corresponding path program 2 times [2024-06-14 12:43:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:13,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878801951] [2024-06-14 12:43:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:13,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:15,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:15,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878801951] [2024-06-14 12:43:15,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878801951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:15,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:15,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:43:15,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926658430] [2024-06-14 12:43:15,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:15,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:43:15,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:43:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:43:15,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:15,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:15,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:15,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:15,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:16,058 INFO L124 PetriNetUnfolderBase]: 1205/1876 cut-off events. [2024-06-14 12:43:16,059 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2024-06-14 12:43:16,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6810 conditions, 1876 events. 1205/1876 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8860 event pairs, 467 based on Foata normal form. 2/1877 useless extension candidates. Maximal degree in co-relation 6784. Up to 1721 conditions per place. [2024-06-14 12:43:16,069 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 20 changer transitions 0/78 dead transitions. [2024-06-14 12:43:16,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 535 flow [2024-06-14 12:43:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:43:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:43:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:43:16,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:43:16,071 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:43:16,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 535 flow [2024-06-14 12:43:16,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 506 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:43:16,077 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 362 flow [2024-06-14 12:43:16,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-14 12:43:16,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 12:43:16,078 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 362 flow [2024-06-14 12:43:16,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:16,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:16,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:16,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:43:16,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:16,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash -337208313, now seen corresponding path program 1 times [2024-06-14 12:43:16,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:16,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377106323] [2024-06-14 12:43:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:16,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:18,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:18,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377106323] [2024-06-14 12:43:18,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377106323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:18,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:18,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:18,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492206785] [2024-06-14 12:43:18,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:18,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:18,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:18,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:18,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 362 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:18,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:18,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:18,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:19,306 INFO L124 PetriNetUnfolderBase]: 1413/2217 cut-off events. [2024-06-14 12:43:19,306 INFO L125 PetriNetUnfolderBase]: For 8850/8850 co-relation queries the response was YES. [2024-06-14 12:43:19,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8343 conditions, 2217 events. 1413/2217 cut-off events. For 8850/8850 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10898 event pairs, 393 based on Foata normal form. 8/2224 useless extension candidates. Maximal degree in co-relation 8316. Up to 1716 conditions per place. [2024-06-14 12:43:19,321 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 88 selfloop transitions, 39 changer transitions 0/132 dead transitions. [2024-06-14 12:43:19,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 132 transitions, 1033 flow [2024-06-14 12:43:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:43:19,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-14 12:43:19,323 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 362 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:43:19,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 132 transitions, 1033 flow [2024-06-14 12:43:19,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 132 transitions, 907 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:19,330 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 583 flow [2024-06-14 12:43:19,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=583, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2024-06-14 12:43:19,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-14 12:43:19,331 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 583 flow [2024-06-14 12:43:19,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:19,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:19,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:19,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:43:19,332 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:19,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1671604069, now seen corresponding path program 2 times [2024-06-14 12:43:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:19,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042564848] [2024-06-14 12:43:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:21,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:21,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042564848] [2024-06-14 12:43:21,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042564848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:21,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:21,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:21,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794753584] [2024-06-14 12:43:21,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:21,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:21,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:21,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:21,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:21,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:21,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:21,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:23,213 INFO L124 PetriNetUnfolderBase]: 1501/2369 cut-off events. [2024-06-14 12:43:23,213 INFO L125 PetriNetUnfolderBase]: For 11757/11763 co-relation queries the response was YES. [2024-06-14 12:43:23,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9769 conditions, 2369 events. 1501/2369 cut-off events. For 11757/11763 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11830 event pairs, 420 based on Foata normal form. 16/2384 useless extension candidates. Maximal degree in co-relation 9738. Up to 1772 conditions per place. [2024-06-14 12:43:23,227 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 48 changer transitions 0/125 dead transitions. [2024-06-14 12:43:23,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 125 transitions, 1031 flow [2024-06-14 12:43:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:43:23,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:43:23,240 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 583 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:43:23,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 125 transitions, 1031 flow [2024-06-14 12:43:23,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 125 transitions, 1003 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 12:43:23,250 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 736 flow [2024-06-14 12:43:23,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2024-06-14 12:43:23,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 12:43:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 736 flow [2024-06-14 12:43:23,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:23,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:23,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:23,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:43:23,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:23,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1744707577, now seen corresponding path program 3 times [2024-06-14 12:43:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:23,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270428470] [2024-06-14 12:43:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270428470] [2024-06-14 12:43:25,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270428470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:25,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:25,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:25,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83933382] [2024-06-14 12:43:25,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:25,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:25,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:25,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:25,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:25,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:25,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:25,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:25,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:25,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:26,555 INFO L124 PetriNetUnfolderBase]: 1545/2426 cut-off events. [2024-06-14 12:43:26,555 INFO L125 PetriNetUnfolderBase]: For 14505/14509 co-relation queries the response was YES. [2024-06-14 12:43:26,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10793 conditions, 2426 events. 1545/2426 cut-off events. For 14505/14509 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12049 event pairs, 425 based on Foata normal form. 8/2433 useless extension candidates. Maximal degree in co-relation 10760. Up to 1790 conditions per place. [2024-06-14 12:43:26,568 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 58 changer transitions 0/133 dead transitions. [2024-06-14 12:43:26,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 133 transitions, 1290 flow [2024-06-14 12:43:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:43:26,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:43:26,570 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 736 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:43:26,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 133 transitions, 1290 flow [2024-06-14 12:43:26,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 133 transitions, 1174 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:26,583 INFO L231 Difference]: Finished difference. Result has 78 places, 100 transitions, 880 flow [2024-06-14 12:43:26,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=78, PETRI_TRANSITIONS=100} [2024-06-14 12:43:26,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 12:43:26,584 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 100 transitions, 880 flow [2024-06-14 12:43:26,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:26,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:26,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:26,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:43:26,584 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:26,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1494235399, now seen corresponding path program 4 times [2024-06-14 12:43:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:26,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212739060] [2024-06-14 12:43:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:28,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:28,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212739060] [2024-06-14 12:43:28,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212739060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:28,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:28,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:28,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788978957] [2024-06-14 12:43:28,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:28,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:28,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:28,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:28,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:28,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:28,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:28,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:28,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:28,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:29,906 INFO L124 PetriNetUnfolderBase]: 1529/2403 cut-off events. [2024-06-14 12:43:29,907 INFO L125 PetriNetUnfolderBase]: For 14636/14646 co-relation queries the response was YES. [2024-06-14 12:43:29,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10591 conditions, 2403 events. 1529/2403 cut-off events. For 14636/14646 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11943 event pairs, 413 based on Foata normal form. 14/2416 useless extension candidates. Maximal degree in co-relation 10557. Up to 1783 conditions per place. [2024-06-14 12:43:29,943 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 66 selfloop transitions, 60 changer transitions 0/131 dead transitions. [2024-06-14 12:43:29,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 1264 flow [2024-06-14 12:43:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:43:29,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 12:43:29,958 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 880 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:43:29,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 1264 flow [2024-06-14 12:43:29,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 1177 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 12:43:29,975 INFO L231 Difference]: Finished difference. Result has 83 places, 100 transitions, 923 flow [2024-06-14 12:43:29,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=923, PETRI_PLACES=83, PETRI_TRANSITIONS=100} [2024-06-14 12:43:29,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 12:43:29,977 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 100 transitions, 923 flow [2024-06-14 12:43:29,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:29,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:29,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:29,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:43:29,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:29,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1411331158, now seen corresponding path program 1 times [2024-06-14 12:43:29,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:29,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881903765] [2024-06-14 12:43:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:32,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:32,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881903765] [2024-06-14 12:43:32,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881903765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:32,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:32,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:32,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847646070] [2024-06-14 12:43:32,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:32,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:32,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:32,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:32,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 100 transitions, 923 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:32,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:32,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:32,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:33,673 INFO L124 PetriNetUnfolderBase]: 1581/2525 cut-off events. [2024-06-14 12:43:33,674 INFO L125 PetriNetUnfolderBase]: For 17253/17261 co-relation queries the response was YES. [2024-06-14 12:43:33,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11406 conditions, 2525 events. 1581/2525 cut-off events. For 17253/17261 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12980 event pairs, 435 based on Foata normal form. 16/2540 useless extension candidates. Maximal degree in co-relation 11369. Up to 1827 conditions per place. [2024-06-14 12:43:33,717 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 63 changer transitions 0/145 dead transitions. [2024-06-14 12:43:33,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 1449 flow [2024-06-14 12:43:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:43:33,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-14 12:43:33,719 INFO L175 Difference]: Start difference. First operand has 83 places, 100 transitions, 923 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:43:33,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 1449 flow [2024-06-14 12:43:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 145 transitions, 1285 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:43:33,739 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 984 flow [2024-06-14 12:43:33,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=984, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2024-06-14 12:43:33,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 12:43:33,740 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 984 flow [2024-06-14 12:43:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:33,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:33,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:43:33,741 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:33,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:33,741 INFO L85 PathProgramCache]: Analyzing trace with hash -280117106, now seen corresponding path program 2 times [2024-06-14 12:43:33,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:33,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746879697] [2024-06-14 12:43:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:33,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:36,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746879697] [2024-06-14 12:43:36,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746879697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:36,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:36,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:43:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076056494] [2024-06-14 12:43:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:36,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:43:36,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:43:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:43:36,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:36,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 984 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:36,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:36,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:36,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:37,908 INFO L124 PetriNetUnfolderBase]: 1621/2589 cut-off events. [2024-06-14 12:43:37,908 INFO L125 PetriNetUnfolderBase]: For 19139/19145 co-relation queries the response was YES. [2024-06-14 12:43:37,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11751 conditions, 2589 events. 1621/2589 cut-off events. For 19139/19145 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13409 event pairs, 435 based on Foata normal form. 12/2600 useless extension candidates. Maximal degree in co-relation 11714. Up to 1862 conditions per place. [2024-06-14 12:43:37,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 68 changer transitions 0/153 dead transitions. [2024-06-14 12:43:37,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 153 transitions, 1536 flow [2024-06-14 12:43:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:43:37,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 12:43:37,934 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 984 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:43:37,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 153 transitions, 1536 flow [2024-06-14 12:43:37,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 153 transitions, 1321 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:37,958 INFO L231 Difference]: Finished difference. Result has 85 places, 112 transitions, 1005 flow [2024-06-14 12:43:37,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1005, PETRI_PLACES=85, PETRI_TRANSITIONS=112} [2024-06-14 12:43:37,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-14 12:43:37,959 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 112 transitions, 1005 flow [2024-06-14 12:43:37,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:37,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:37,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:37,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:43:37,960 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:37,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1871607694, now seen corresponding path program 3 times [2024-06-14 12:43:37,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:37,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653710495] [2024-06-14 12:43:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:37,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:40,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:40,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653710495] [2024-06-14 12:43:40,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653710495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:40,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:40,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:43:40,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792495355] [2024-06-14 12:43:40,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:40,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:43:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:43:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:43:40,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:40,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 112 transitions, 1005 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:40,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:40,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:40,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:42,060 INFO L124 PetriNetUnfolderBase]: 1665/2642 cut-off events. [2024-06-14 12:43:42,060 INFO L125 PetriNetUnfolderBase]: For 20485/20489 co-relation queries the response was YES. [2024-06-14 12:43:42,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12146 conditions, 2642 events. 1665/2642 cut-off events. For 20485/20489 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13527 event pairs, 451 based on Foata normal form. 8/2649 useless extension candidates. Maximal degree in co-relation 12109. Up to 1900 conditions per place. [2024-06-14 12:43:42,072 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 74 selfloop transitions, 76 changer transitions 0/155 dead transitions. [2024-06-14 12:43:42,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 155 transitions, 1547 flow [2024-06-14 12:43:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:43:42,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:43:42,075 INFO L175 Difference]: Start difference. First operand has 85 places, 112 transitions, 1005 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:43:42,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 155 transitions, 1547 flow [2024-06-14 12:43:42,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 155 transitions, 1422 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:42,091 INFO L231 Difference]: Finished difference. Result has 88 places, 118 transitions, 1125 flow [2024-06-14 12:43:42,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=88, PETRI_TRANSITIONS=118} [2024-06-14 12:43:42,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 12:43:42,092 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 118 transitions, 1125 flow [2024-06-14 12:43:42,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:42,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:42,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:42,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:43:42,092 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:42,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash 486379154, now seen corresponding path program 4 times [2024-06-14 12:43:42,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:42,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164998755] [2024-06-14 12:43:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:42,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:44,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:44,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164998755] [2024-06-14 12:43:44,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164998755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:44,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:44,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:43:44,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839379529] [2024-06-14 12:43:44,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:44,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:43:44,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:43:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:43:44,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:44,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 118 transitions, 1125 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:44,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:44,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:44,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:46,116 INFO L124 PetriNetUnfolderBase]: 1649/2648 cut-off events. [2024-06-14 12:43:46,117 INFO L125 PetriNetUnfolderBase]: For 22489/22497 co-relation queries the response was YES. [2024-06-14 12:43:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12186 conditions, 2648 events. 1649/2648 cut-off events. For 22489/22497 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13830 event pairs, 417 based on Foata normal form. 12/2659 useless extension candidates. Maximal degree in co-relation 12148. Up to 1887 conditions per place. [2024-06-14 12:43:46,130 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 78 changer transitions 0/160 dead transitions. [2024-06-14 12:43:46,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 160 transitions, 1563 flow [2024-06-14 12:43:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:43:46,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:43:46,138 INFO L175 Difference]: Start difference. First operand has 88 places, 118 transitions, 1125 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:43:46,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 160 transitions, 1563 flow [2024-06-14 12:43:46,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 160 transitions, 1407 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:46,159 INFO L231 Difference]: Finished difference. Result has 92 places, 118 transitions, 1136 flow [2024-06-14 12:43:46,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1136, PETRI_PLACES=92, PETRI_TRANSITIONS=118} [2024-06-14 12:43:46,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-14 12:43:46,175 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 118 transitions, 1136 flow [2024-06-14 12:43:46,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:46,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:46,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:46,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:43:46,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:46,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash -879162023, now seen corresponding path program 1 times [2024-06-14 12:43:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269737022] [2024-06-14 12:43:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:48,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269737022] [2024-06-14 12:43:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269737022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:48,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:43:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480386529] [2024-06-14 12:43:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:48,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:43:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:43:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:43:48,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:48,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 118 transitions, 1136 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:48,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:48,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:48,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:49,696 INFO L124 PetriNetUnfolderBase]: 1641/2642 cut-off events. [2024-06-14 12:43:49,696 INFO L125 PetriNetUnfolderBase]: For 25062/25064 co-relation queries the response was YES. [2024-06-14 12:43:49,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12294 conditions, 2642 events. 1641/2642 cut-off events. For 25062/25064 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13840 event pairs, 513 based on Foata normal form. 4/2646 useless extension candidates. Maximal degree in co-relation 12254. Up to 2403 conditions per place. [2024-06-14 12:43:49,713 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-14 12:43:49,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 1559 flow [2024-06-14 12:43:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:43:49,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:43:49,716 INFO L175 Difference]: Start difference. First operand has 92 places, 118 transitions, 1136 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:43:49,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 1559 flow [2024-06-14 12:43:49,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 153 transitions, 1284 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 12:43:49,736 INFO L231 Difference]: Finished difference. Result has 91 places, 123 transitions, 953 flow [2024-06-14 12:43:49,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=953, PETRI_PLACES=91, PETRI_TRANSITIONS=123} [2024-06-14 12:43:49,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-14 12:43:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 123 transitions, 953 flow [2024-06-14 12:43:49,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:49,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:49,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:43:49,738 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:49,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash 595320522, now seen corresponding path program 1 times [2024-06-14 12:43:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177735069] [2024-06-14 12:43:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:50,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:50,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177735069] [2024-06-14 12:43:50,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177735069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:50,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:50,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:43:50,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944410946] [2024-06-14 12:43:50,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:50,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:43:50,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:50,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:43:50,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:43:50,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:43:50,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 123 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:50,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:50,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:43:50,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:51,681 INFO L124 PetriNetUnfolderBase]: 1522/2470 cut-off events. [2024-06-14 12:43:51,682 INFO L125 PetriNetUnfolderBase]: For 23885/23908 co-relation queries the response was YES. [2024-06-14 12:43:51,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11366 conditions, 2470 events. 1522/2470 cut-off events. For 23885/23908 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13052 event pairs, 460 based on Foata normal form. 12/2465 useless extension candidates. Maximal degree in co-relation 11325. Up to 2231 conditions per place. [2024-06-14 12:43:51,693 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 117 selfloop transitions, 8 changer transitions 0/137 dead transitions. [2024-06-14 12:43:51,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 1255 flow [2024-06-14 12:43:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:43:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:43:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:43:51,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:43:51,695 INFO L175 Difference]: Start difference. First operand has 91 places, 123 transitions, 953 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:43:51,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 1255 flow [2024-06-14 12:43:51,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 1210 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:51,712 INFO L231 Difference]: Finished difference. Result has 91 places, 126 transitions, 958 flow [2024-06-14 12:43:51,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=958, PETRI_PLACES=91, PETRI_TRANSITIONS=126} [2024-06-14 12:43:51,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-14 12:43:51,714 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 126 transitions, 958 flow [2024-06-14 12:43:51,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:51,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:51,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:51,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:43:51,715 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:51,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash -212020066, now seen corresponding path program 1 times [2024-06-14 12:43:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:51,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75450180] [2024-06-14 12:43:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:51,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75450180] [2024-06-14 12:43:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75450180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705211172] [2024-06-14 12:43:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:54,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:54,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 126 transitions, 958 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:54,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:54,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:54,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:55,318 INFO L124 PetriNetUnfolderBase]: 1655/2659 cut-off events. [2024-06-14 12:43:55,319 INFO L125 PetriNetUnfolderBase]: For 25604/25618 co-relation queries the response was YES. [2024-06-14 12:43:55,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12330 conditions, 2659 events. 1655/2659 cut-off events. For 25604/25618 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13987 event pairs, 306 based on Foata normal form. 16/2675 useless extension candidates. Maximal degree in co-relation 12288. Up to 2171 conditions per place. [2024-06-14 12:43:55,335 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 125 selfloop transitions, 32 changer transitions 0/162 dead transitions. [2024-06-14 12:43:55,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 162 transitions, 1472 flow [2024-06-14 12:43:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:43:55,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 12:43:55,350 INFO L175 Difference]: Start difference. First operand has 91 places, 126 transitions, 958 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:43:55,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 162 transitions, 1472 flow [2024-06-14 12:43:55,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 162 transitions, 1444 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:43:55,374 INFO L231 Difference]: Finished difference. Result has 95 places, 130 transitions, 1049 flow [2024-06-14 12:43:55,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1049, PETRI_PLACES=95, PETRI_TRANSITIONS=130} [2024-06-14 12:43:55,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-14 12:43:55,375 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 130 transitions, 1049 flow [2024-06-14 12:43:55,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:55,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:55,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:43:55,376 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:55,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash -209163106, now seen corresponding path program 2 times [2024-06-14 12:43:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:55,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335483382] [2024-06-14 12:43:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:57,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335483382] [2024-06-14 12:43:57,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335483382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:57,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:43:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998814053] [2024-06-14 12:43:57,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:57,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:43:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:43:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:43:58,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:58,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 130 transitions, 1049 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:58,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:58,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:58,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:59,012 INFO L124 PetriNetUnfolderBase]: 1647/2637 cut-off events. [2024-06-14 12:43:59,012 INFO L125 PetriNetUnfolderBase]: For 28087/28093 co-relation queries the response was YES. [2024-06-14 12:43:59,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12623 conditions, 2637 events. 1647/2637 cut-off events. For 28087/28093 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13693 event pairs, 414 based on Foata normal form. 8/2645 useless extension candidates. Maximal degree in co-relation 12580. Up to 2267 conditions per place. [2024-06-14 12:43:59,028 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 122 selfloop transitions, 33 changer transitions 0/160 dead transitions. [2024-06-14 12:43:59,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 160 transitions, 1449 flow [2024-06-14 12:43:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:43:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:43:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:43:59,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 12:43:59,031 INFO L175 Difference]: Start difference. First operand has 95 places, 130 transitions, 1049 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:43:59,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 160 transitions, 1449 flow [2024-06-14 12:43:59,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 160 transitions, 1389 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:43:59,058 INFO L231 Difference]: Finished difference. Result has 99 places, 130 transitions, 1064 flow [2024-06-14 12:43:59,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1064, PETRI_PLACES=99, PETRI_TRANSITIONS=130} [2024-06-14 12:43:59,060 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 12:43:59,060 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 130 transitions, 1064 flow [2024-06-14 12:43:59,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:59,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:59,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:43:59,061 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:59,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2017314213, now seen corresponding path program 1 times [2024-06-14 12:43:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:59,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070393992] [2024-06-14 12:43:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:59,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:01,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:01,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070393992] [2024-06-14 12:44:01,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070393992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:01,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:01,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:01,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678032458] [2024-06-14 12:44:01,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:01,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:01,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:01,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:01,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 130 transitions, 1064 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:01,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:01,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:01,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:02,985 INFO L124 PetriNetUnfolderBase]: 1811/2935 cut-off events. [2024-06-14 12:44:02,985 INFO L125 PetriNetUnfolderBase]: For 37385/37387 co-relation queries the response was YES. [2024-06-14 12:44:02,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14243 conditions, 2935 events. 1811/2935 cut-off events. For 37385/37387 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15772 event pairs, 350 based on Foata normal form. 16/2950 useless extension candidates. Maximal degree in co-relation 14198. Up to 1465 conditions per place. [2024-06-14 12:44:03,002 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 73 changer transitions 0/178 dead transitions. [2024-06-14 12:44:03,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 178 transitions, 1662 flow [2024-06-14 12:44:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:44:03,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 12:44:03,004 INFO L175 Difference]: Start difference. First operand has 99 places, 130 transitions, 1064 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:44:03,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 178 transitions, 1662 flow [2024-06-14 12:44:03,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 178 transitions, 1587 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:03,033 INFO L231 Difference]: Finished difference. Result has 101 places, 132 transitions, 1179 flow [2024-06-14 12:44:03,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1179, PETRI_PLACES=101, PETRI_TRANSITIONS=132} [2024-06-14 12:44:03,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 12:44:03,034 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 132 transitions, 1179 flow [2024-06-14 12:44:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:03,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:03,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:44:03,034 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:03,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2019191883, now seen corresponding path program 2 times [2024-06-14 12:44:03,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:03,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444141646] [2024-06-14 12:44:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:03,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:05,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:05,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444141646] [2024-06-14 12:44:05,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444141646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:05,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:05,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:05,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950258674] [2024-06-14 12:44:05,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:05,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:05,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:05,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:05,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 132 transitions, 1179 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:05,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:05,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:05,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:07,471 INFO L124 PetriNetUnfolderBase]: 1919/3117 cut-off events. [2024-06-14 12:44:07,471 INFO L125 PetriNetUnfolderBase]: For 43721/43727 co-relation queries the response was YES. [2024-06-14 12:44:07,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15392 conditions, 3117 events. 1919/3117 cut-off events. For 43721/43727 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17153 event pairs, 468 based on Foata normal form. 28/3144 useless extension candidates. Maximal degree in co-relation 15346. Up to 2135 conditions per place. [2024-06-14 12:44:07,489 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 92 selfloop transitions, 78 changer transitions 0/175 dead transitions. [2024-06-14 12:44:07,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 175 transitions, 1677 flow [2024-06-14 12:44:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:44:07,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:44:07,491 INFO L175 Difference]: Start difference. First operand has 101 places, 132 transitions, 1179 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:44:07,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 175 transitions, 1677 flow [2024-06-14 12:44:07,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 175 transitions, 1591 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:44:07,525 INFO L231 Difference]: Finished difference. Result has 105 places, 134 transitions, 1293 flow [2024-06-14 12:44:07,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1293, PETRI_PLACES=105, PETRI_TRANSITIONS=134} [2024-06-14 12:44:07,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 12:44:07,526 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 134 transitions, 1293 flow [2024-06-14 12:44:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:07,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:07,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:44:07,527 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:07,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1246410797, now seen corresponding path program 3 times [2024-06-14 12:44:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:07,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317653293] [2024-06-14 12:44:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317653293] [2024-06-14 12:44:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317653293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:10,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:10,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:10,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407497504] [2024-06-14 12:44:10,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:10,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:10,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:10,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 134 transitions, 1293 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:10,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:10,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:10,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:11,805 INFO L124 PetriNetUnfolderBase]: 1987/3243 cut-off events. [2024-06-14 12:44:11,806 INFO L125 PetriNetUnfolderBase]: For 47456/47458 co-relation queries the response was YES. [2024-06-14 12:44:11,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16598 conditions, 3243 events. 1987/3243 cut-off events. For 47456/47458 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18131 event pairs, 484 based on Foata normal form. 16/3258 useless extension candidates. Maximal degree in co-relation 16550. Up to 2107 conditions per place. [2024-06-14 12:44:11,827 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 79 changer transitions 0/179 dead transitions. [2024-06-14 12:44:11,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 179 transitions, 1801 flow [2024-06-14 12:44:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:44:11,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 12:44:11,829 INFO L175 Difference]: Start difference. First operand has 105 places, 134 transitions, 1293 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:44:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 179 transitions, 1801 flow [2024-06-14 12:44:11,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 179 transitions, 1637 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:11,872 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1317 flow [2024-06-14 12:44:11,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-14 12:44:11,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 12:44:11,873 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1317 flow [2024-06-14 12:44:11,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:11,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:11,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:11,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:44:11,874 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:11,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1895917777, now seen corresponding path program 4 times [2024-06-14 12:44:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:11,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825383975] [2024-06-14 12:44:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:11,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:14,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825383975] [2024-06-14 12:44:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825383975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:14,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:14,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:14,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029324532] [2024-06-14 12:44:14,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:14,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:14,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1317 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:14,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:14,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:16,073 INFO L124 PetriNetUnfolderBase]: 2123/3513 cut-off events. [2024-06-14 12:44:16,074 INFO L125 PetriNetUnfolderBase]: For 55568/55576 co-relation queries the response was YES. [2024-06-14 12:44:16,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17961 conditions, 3513 events. 2123/3513 cut-off events. For 55568/55576 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20292 event pairs, 403 based on Foata normal form. 24/3536 useless extension candidates. Maximal degree in co-relation 17912. Up to 2199 conditions per place. [2024-06-14 12:44:16,093 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 81 changer transitions 0/187 dead transitions. [2024-06-14 12:44:16,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 187 transitions, 1971 flow [2024-06-14 12:44:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:44:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 12:44:16,095 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1317 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:44:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 187 transitions, 1971 flow [2024-06-14 12:44:16,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 187 transitions, 1801 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:16,137 INFO L231 Difference]: Finished difference. Result has 109 places, 137 transitions, 1365 flow [2024-06-14 12:44:16,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1365, PETRI_PLACES=109, PETRI_TRANSITIONS=137} [2024-06-14 12:44:16,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 12:44:16,138 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 137 transitions, 1365 flow [2024-06-14 12:44:16,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:16,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:16,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:16,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:44:16,138 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:16,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1901428027, now seen corresponding path program 5 times [2024-06-14 12:44:16,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:16,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075614856] [2024-06-14 12:44:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:16,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075614856] [2024-06-14 12:44:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075614856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:20,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:20,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500328967] [2024-06-14 12:44:20,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:20,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:20,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 137 transitions, 1365 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:20,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:20,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:20,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:21,619 INFO L124 PetriNetUnfolderBase]: 2211/3645 cut-off events. [2024-06-14 12:44:21,620 INFO L125 PetriNetUnfolderBase]: For 61578/61584 co-relation queries the response was YES. [2024-06-14 12:44:21,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18748 conditions, 3645 events. 2211/3645 cut-off events. For 61578/61584 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21249 event pairs, 546 based on Foata normal form. 24/3668 useless extension candidates. Maximal degree in co-relation 18698. Up to 2675 conditions per place. [2024-06-14 12:44:21,642 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 104 selfloop transitions, 77 changer transitions 0/186 dead transitions. [2024-06-14 12:44:21,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 186 transitions, 1907 flow [2024-06-14 12:44:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:44:21,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:44:21,645 INFO L175 Difference]: Start difference. First operand has 109 places, 137 transitions, 1365 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:44:21,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 186 transitions, 1907 flow [2024-06-14 12:44:21,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 186 transitions, 1800 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:44:21,699 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1449 flow [2024-06-14 12:44:21,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1449, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-14 12:44:21,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-14 12:44:21,703 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1449 flow [2024-06-14 12:44:21,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:21,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:21,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:21,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:44:21,704 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:21,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1896065647, now seen corresponding path program 6 times [2024-06-14 12:44:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095762581] [2024-06-14 12:44:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:21,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095762581] [2024-06-14 12:44:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095762581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:24,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350252166] [2024-06-14 12:44:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:24,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:24,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:24,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1449 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:24,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:24,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:24,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:26,150 INFO L124 PetriNetUnfolderBase]: 2299/3809 cut-off events. [2024-06-14 12:44:26,151 INFO L125 PetriNetUnfolderBase]: For 67371/67379 co-relation queries the response was YES. [2024-06-14 12:44:26,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19876 conditions, 3809 events. 2299/3809 cut-off events. For 67371/67379 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22600 event pairs, 553 based on Foata normal form. 28/3836 useless extension candidates. Maximal degree in co-relation 19824. Up to 2823 conditions per place. [2024-06-14 12:44:26,175 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 102 selfloop transitions, 78 changer transitions 0/185 dead transitions. [2024-06-14 12:44:26,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 185 transitions, 1985 flow [2024-06-14 12:44:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:44:26,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:44:26,177 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1449 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:44:26,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 185 transitions, 1985 flow [2024-06-14 12:44:26,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 185 transitions, 1822 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:26,227 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1481 flow [2024-06-14 12:44:26,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1481, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-06-14 12:44:26,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 12:44:26,228 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1481 flow [2024-06-14 12:44:26,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:26,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:26,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:26,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:44:26,229 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:26,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1640531793, now seen corresponding path program 1 times [2024-06-14 12:44:26,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:26,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649556998] [2024-06-14 12:44:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:26,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:28,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:28,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649556998] [2024-06-14 12:44:28,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649556998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:28,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:28,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:44:28,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767901095] [2024-06-14 12:44:28,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:28,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:44:28,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:44:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:44:28,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:44:28,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1481 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 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) [2024-06-14 12:44:28,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:28,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:44:28,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:29,425 INFO L124 PetriNetUnfolderBase]: 2172/3621 cut-off events. [2024-06-14 12:44:29,425 INFO L125 PetriNetUnfolderBase]: For 66759/66780 co-relation queries the response was YES. [2024-06-14 12:44:29,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19361 conditions, 3621 events. 2172/3621 cut-off events. For 66759/66780 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21804 event pairs, 599 based on Foata normal form. 12/3597 useless extension candidates. Maximal degree in co-relation 19308. Up to 3297 conditions per place. [2024-06-14 12:44:29,450 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 136 selfloop transitions, 13 changer transitions 0/163 dead transitions. [2024-06-14 12:44:29,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 163 transitions, 1869 flow [2024-06-14 12:44:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:44:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:44:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:44:29,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:44:29,453 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1481 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:44:29,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 163 transitions, 1869 flow [2024-06-14 12:44:29,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 1702 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:29,512 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1379 flow [2024-06-14 12:44:29,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1379, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2024-06-14 12:44:29,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 12:44:29,513 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1379 flow [2024-06-14 12:44:29,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 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) [2024-06-14 12:44:29,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:29,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:29,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:44:29,514 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:29,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1608369487, now seen corresponding path program 7 times [2024-06-14 12:44:29,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:29,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830765795] [2024-06-14 12:44:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:29,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:32,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830765795] [2024-06-14 12:44:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830765795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:32,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:32,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654220880] [2024-06-14 12:44:32,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:32,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:32,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:32,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:32,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1379 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:32,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:32,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:32,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:34,780 INFO L124 PetriNetUnfolderBase]: 2397/3954 cut-off events. [2024-06-14 12:44:34,780 INFO L125 PetriNetUnfolderBase]: For 74089/74097 co-relation queries the response was YES. [2024-06-14 12:44:34,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20518 conditions, 3954 events. 2397/3954 cut-off events. For 74089/74097 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23503 event pairs, 548 based on Foata normal form. 26/3979 useless extension candidates. Maximal degree in co-relation 20464. Up to 2991 conditions per place. [2024-06-14 12:44:34,804 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 81 changer transitions 0/195 dead transitions. [2024-06-14 12:44:34,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 195 transitions, 1961 flow [2024-06-14 12:44:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 12:44:34,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 12:44:34,806 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1379 flow. Second operand 10 states and 186 transitions. [2024-06-14 12:44:34,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 195 transitions, 1961 flow [2024-06-14 12:44:34,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 195 transitions, 1920 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:44:34,870 INFO L231 Difference]: Finished difference. Result has 121 places, 143 transitions, 1541 flow [2024-06-14 12:44:34,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1541, PETRI_PLACES=121, PETRI_TRANSITIONS=143} [2024-06-14 12:44:34,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 12:44:34,870 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 143 transitions, 1541 flow [2024-06-14 12:44:34,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:34,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:34,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:44:34,871 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:34,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash -199245267, now seen corresponding path program 8 times [2024-06-14 12:44:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065420537] [2024-06-14 12:44:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:37,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:37,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065420537] [2024-06-14 12:44:37,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065420537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:37,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:37,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:37,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81038780] [2024-06-14 12:44:37,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:37,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:37,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:37,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:37,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 143 transitions, 1541 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:37,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:37,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:37,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:39,722 INFO L124 PetriNetUnfolderBase]: 2361/3874 cut-off events. [2024-06-14 12:44:39,722 INFO L125 PetriNetUnfolderBase]: For 73890/73894 co-relation queries the response was YES. [2024-06-14 12:44:39,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20401 conditions, 3874 events. 2361/3874 cut-off events. For 73890/73894 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22879 event pairs, 564 based on Foata normal form. 22/3895 useless extension candidates. Maximal degree in co-relation 20346. Up to 2935 conditions per place. [2024-06-14 12:44:39,746 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 104 selfloop transitions, 79 changer transitions 0/188 dead transitions. [2024-06-14 12:44:39,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 188 transitions, 2055 flow [2024-06-14 12:44:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:44:39,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:44:39,748 INFO L175 Difference]: Start difference. First operand has 121 places, 143 transitions, 1541 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:44:39,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 188 transitions, 2055 flow [2024-06-14 12:44:39,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 188 transitions, 1870 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 12:44:39,821 INFO L231 Difference]: Finished difference. Result has 122 places, 143 transitions, 1523 flow [2024-06-14 12:44:39,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1523, PETRI_PLACES=122, PETRI_TRANSITIONS=143} [2024-06-14 12:44:39,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 12:44:39,822 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 143 transitions, 1523 flow [2024-06-14 12:44:39,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:39,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:39,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:39,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:44:39,822 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:39,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:39,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1224375448, now seen corresponding path program 1 times [2024-06-14 12:44:39,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:39,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638030429] [2024-06-14 12:44:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:39,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:42,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638030429] [2024-06-14 12:44:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638030429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:42,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:42,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:42,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457486805] [2024-06-14 12:44:42,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:42,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:42,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:42,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:42,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:42,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 143 transitions, 1523 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:42,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:42,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:42,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:44,199 INFO L124 PetriNetUnfolderBase]: 2403/3936 cut-off events. [2024-06-14 12:44:44,199 INFO L125 PetriNetUnfolderBase]: For 70640/70648 co-relation queries the response was YES. [2024-06-14 12:44:44,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20664 conditions, 3936 events. 2403/3936 cut-off events. For 70640/70648 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23290 event pairs, 556 based on Foata normal form. 10/3945 useless extension candidates. Maximal degree in co-relation 20608. Up to 3113 conditions per place. [2024-06-14 12:44:44,223 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 102 changer transitions 0/204 dead transitions. [2024-06-14 12:44:44,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 204 transitions, 2305 flow [2024-06-14 12:44:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:44:44,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:44:44,224 INFO L175 Difference]: Start difference. First operand has 122 places, 143 transitions, 1523 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:44:44,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 204 transitions, 2305 flow [2024-06-14 12:44:44,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 204 transitions, 2079 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:44:44,286 INFO L231 Difference]: Finished difference. Result has 124 places, 165 transitions, 1798 flow [2024-06-14 12:44:44,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1798, PETRI_PLACES=124, PETRI_TRANSITIONS=165} [2024-06-14 12:44:44,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 12:44:44,287 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 165 transitions, 1798 flow [2024-06-14 12:44:44,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:44,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:44,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:44,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:44:44,288 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:44,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1233898648, now seen corresponding path program 2 times [2024-06-14 12:44:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:44,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315191957] [2024-06-14 12:44:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:44,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:47,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315191957] [2024-06-14 12:44:47,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315191957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:47,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:47,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:47,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784155605] [2024-06-14 12:44:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:47,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:47,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:47,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:47,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 165 transitions, 1798 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:47,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:47,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:47,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:48,911 INFO L124 PetriNetUnfolderBase]: 2443/4020 cut-off events. [2024-06-14 12:44:48,912 INFO L125 PetriNetUnfolderBase]: For 73171/73179 co-relation queries the response was YES. [2024-06-14 12:44:48,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21244 conditions, 4020 events. 2443/4020 cut-off events. For 73171/73179 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24063 event pairs, 478 based on Foata normal form. 10/4029 useless extension candidates. Maximal degree in co-relation 21186. Up to 2929 conditions per place. [2024-06-14 12:44:48,938 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 109 changer transitions 0/215 dead transitions. [2024-06-14 12:44:48,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 215 transitions, 2560 flow [2024-06-14 12:44:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:44:48,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:44:48,941 INFO L175 Difference]: Start difference. First operand has 124 places, 165 transitions, 1798 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:44:48,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 215 transitions, 2560 flow [2024-06-14 12:44:49,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 215 transitions, 2377 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:44:49,030 INFO L231 Difference]: Finished difference. Result has 130 places, 170 transitions, 1959 flow [2024-06-14 12:44:49,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1959, PETRI_PLACES=130, PETRI_TRANSITIONS=170} [2024-06-14 12:44:49,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 12:44:49,030 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 170 transitions, 1959 flow [2024-06-14 12:44:49,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:49,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:49,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:44:49,031 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:49,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2117983180, now seen corresponding path program 3 times [2024-06-14 12:44:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:49,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536856415] [2024-06-14 12:44:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:49,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:52,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:52,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536856415] [2024-06-14 12:44:52,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536856415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:52,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:52,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:52,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106816374] [2024-06-14 12:44:52,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:52,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:52,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:52,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:52,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:52,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 170 transitions, 1959 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:52,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:52,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:52,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:53,826 INFO L124 PetriNetUnfolderBase]: 2463/4057 cut-off events. [2024-06-14 12:44:53,826 INFO L125 PetriNetUnfolderBase]: For 79010/79018 co-relation queries the response was YES. [2024-06-14 12:44:53,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21747 conditions, 4057 events. 2463/4057 cut-off events. For 79010/79018 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24304 event pairs, 572 based on Foata normal form. 10/4066 useless extension candidates. Maximal degree in co-relation 21687. Up to 3217 conditions per place. [2024-06-14 12:44:53,852 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 104 selfloop transitions, 102 changer transitions 0/211 dead transitions. [2024-06-14 12:44:53,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 211 transitions, 2546 flow [2024-06-14 12:44:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:44:53,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:44:53,855 INFO L175 Difference]: Start difference. First operand has 130 places, 170 transitions, 1959 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:44:53,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 211 transitions, 2546 flow [2024-06-14 12:44:53,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 211 transitions, 2302 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:53,934 INFO L231 Difference]: Finished difference. Result has 134 places, 173 transitions, 2001 flow [2024-06-14 12:44:53,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2001, PETRI_PLACES=134, PETRI_TRANSITIONS=173} [2024-06-14 12:44:53,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 12:44:53,935 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 173 transitions, 2001 flow [2024-06-14 12:44:53,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:53,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:53,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:53,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:44:53,936 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:53,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1802093416, now seen corresponding path program 4 times [2024-06-14 12:44:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861583299] [2024-06-14 12:44:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:53,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:57,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861583299] [2024-06-14 12:44:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861583299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:57,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651859424] [2024-06-14 12:44:57,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:57,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:57,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:57,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 173 transitions, 2001 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:57,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:57,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:57,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:59,258 INFO L124 PetriNetUnfolderBase]: 2455/4043 cut-off events. [2024-06-14 12:44:59,259 INFO L125 PetriNetUnfolderBase]: For 81999/82003 co-relation queries the response was YES. [2024-06-14 12:44:59,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21569 conditions, 4043 events. 2455/4043 cut-off events. For 81999/82003 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24172 event pairs, 590 based on Foata normal form. 6/4048 useless extension candidates. Maximal degree in co-relation 21507. Up to 3205 conditions per place. [2024-06-14 12:44:59,287 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 106 selfloop transitions, 100 changer transitions 0/211 dead transitions. [2024-06-14 12:44:59,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 211 transitions, 2536 flow [2024-06-14 12:44:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:44:59,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:44:59,290 INFO L175 Difference]: Start difference. First operand has 134 places, 173 transitions, 2001 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:44:59,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 211 transitions, 2536 flow [2024-06-14 12:44:59,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 211 transitions, 2292 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:59,404 INFO L231 Difference]: Finished difference. Result has 138 places, 174 transitions, 1981 flow [2024-06-14 12:44:59,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1981, PETRI_PLACES=138, PETRI_TRANSITIONS=174} [2024-06-14 12:44:59,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 12:44:59,405 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 174 transitions, 1981 flow [2024-06-14 12:44:59,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:59,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:59,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:59,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:44:59,406 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:59,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:59,406 INFO L85 PathProgramCache]: Analyzing trace with hash 872421513, now seen corresponding path program 2 times [2024-06-14 12:44:59,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:59,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354990255] [2024-06-14 12:44:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:59,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354990255] [2024-06-14 12:45:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354990255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:01,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:01,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:45:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784264853] [2024-06-14 12:45:01,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:45:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:01,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:45:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:45:01,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:45:01,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 174 transitions, 1981 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 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) [2024-06-14 12:45:01,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:01,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:45:01,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:02,569 INFO L124 PetriNetUnfolderBase]: 2312/3906 cut-off events. [2024-06-14 12:45:02,570 INFO L125 PetriNetUnfolderBase]: For 85237/85275 co-relation queries the response was YES. [2024-06-14 12:45:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20843 conditions, 3906 events. 2312/3906 cut-off events. For 85237/85275 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24192 event pairs, 541 based on Foata normal form. 29/3902 useless extension candidates. Maximal degree in co-relation 20779. Up to 3523 conditions per place. [2024-06-14 12:45:02,596 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 160 selfloop transitions, 18 changer transitions 0/192 dead transitions. [2024-06-14 12:45:02,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 192 transitions, 2417 flow [2024-06-14 12:45:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:45:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:45:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 12:45:02,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:45:02,598 INFO L175 Difference]: Start difference. First operand has 138 places, 174 transitions, 1981 flow. Second operand 6 states and 106 transitions. [2024-06-14 12:45:02,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 192 transitions, 2417 flow [2024-06-14 12:45:02,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 192 transitions, 2199 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:02,688 INFO L231 Difference]: Finished difference. Result has 138 places, 177 transitions, 1845 flow [2024-06-14 12:45:02,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1845, PETRI_PLACES=138, PETRI_TRANSITIONS=177} [2024-06-14 12:45:02,689 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 12:45:02,689 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 177 transitions, 1845 flow [2024-06-14 12:45:02,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 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) [2024-06-14 12:45:02,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:02,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:02,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:45:02,689 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:02,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 865761225, now seen corresponding path program 1 times [2024-06-14 12:45:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340904978] [2024-06-14 12:45:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:04,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340904978] [2024-06-14 12:45:04,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340904978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:04,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:04,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:45:04,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897302132] [2024-06-14 12:45:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:04,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:45:04,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:45:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:45:04,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:04,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 177 transitions, 1845 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:04,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:04,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:04,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:05,510 INFO L124 PetriNetUnfolderBase]: 2459/4097 cut-off events. [2024-06-14 12:45:05,511 INFO L125 PetriNetUnfolderBase]: For 86062/86064 co-relation queries the response was YES. [2024-06-14 12:45:05,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21382 conditions, 4097 events. 2459/4097 cut-off events. For 86062/86064 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24895 event pairs, 617 based on Foata normal form. 2/4099 useless extension candidates. Maximal degree in co-relation 21317. Up to 3804 conditions per place. [2024-06-14 12:45:05,536 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 181 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2024-06-14 12:45:05,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 202 transitions, 2411 flow [2024-06-14 12:45:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:45:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:45:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:45:05,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 12:45:05,538 INFO L175 Difference]: Start difference. First operand has 138 places, 177 transitions, 1845 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:45:05,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 202 transitions, 2411 flow [2024-06-14 12:45:05,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 2351 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:45:05,638 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 1885 flow [2024-06-14 12:45:05,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1885, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-14 12:45:05,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-14 12:45:05,639 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 1885 flow [2024-06-14 12:45:05,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:05,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:05,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:05,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:45:05,639 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:05,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1302311595, now seen corresponding path program 2 times [2024-06-14 12:45:05,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:05,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950038190] [2024-06-14 12:45:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:05,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:07,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950038190] [2024-06-14 12:45:07,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950038190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:07,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:07,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:45:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36403116] [2024-06-14 12:45:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:07,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:45:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:45:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:45:07,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:07,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 1885 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:07,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:07,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:07,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:08,562 INFO L124 PetriNetUnfolderBase]: 2453/4090 cut-off events. [2024-06-14 12:45:08,562 INFO L125 PetriNetUnfolderBase]: For 89626/89630 co-relation queries the response was YES. [2024-06-14 12:45:08,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21554 conditions, 4090 events. 2453/4090 cut-off events. For 89626/89630 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24845 event pairs, 620 based on Foata normal form. 4/4094 useless extension candidates. Maximal degree in co-relation 21488. Up to 3799 conditions per place. [2024-06-14 12:45:08,591 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 175 selfloop transitions, 16 changer transitions 0/196 dead transitions. [2024-06-14 12:45:08,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 196 transitions, 2301 flow [2024-06-14 12:45:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:45:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:45:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:45:08,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-14 12:45:08,593 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 1885 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:45:08,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 196 transitions, 2301 flow [2024-06-14 12:45:08,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 196 transitions, 2253 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 12:45:08,704 INFO L231 Difference]: Finished difference. Result has 144 places, 183 transitions, 1875 flow [2024-06-14 12:45:08,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1875, PETRI_PLACES=144, PETRI_TRANSITIONS=183} [2024-06-14 12:45:08,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 12:45:08,705 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 183 transitions, 1875 flow [2024-06-14 12:45:08,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:08,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:08,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:08,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:45:08,706 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:08,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 872436393, now seen corresponding path program 1 times [2024-06-14 12:45:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:08,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622331798] [2024-06-14 12:45:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:08,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:11,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622331798] [2024-06-14 12:45:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622331798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:11,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:11,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:45:11,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141542426] [2024-06-14 12:45:11,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:11,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:45:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:45:11,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:45:11,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:45:11,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 183 transitions, 1875 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:11,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:11,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:45:11,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:12,240 INFO L124 PetriNetUnfolderBase]: 2326/3893 cut-off events. [2024-06-14 12:45:12,240 INFO L125 PetriNetUnfolderBase]: For 95612/95651 co-relation queries the response was YES. [2024-06-14 12:45:12,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20756 conditions, 3893 events. 2326/3893 cut-off events. For 95612/95651 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23846 event pairs, 571 based on Foata normal form. 28/3876 useless extension candidates. Maximal degree in co-relation 20688. Up to 3556 conditions per place. [2024-06-14 12:45:12,274 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 172 selfloop transitions, 10 changer transitions 0/198 dead transitions. [2024-06-14 12:45:12,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 2301 flow [2024-06-14 12:45:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:45:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:45:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:45:12,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 12:45:12,275 INFO L175 Difference]: Start difference. First operand has 144 places, 183 transitions, 1875 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:45:12,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 2301 flow [2024-06-14 12:45:12,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2253 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:12,365 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 1884 flow [2024-06-14 12:45:12,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1884, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2024-06-14 12:45:12,366 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 12:45:12,366 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 1884 flow [2024-06-14 12:45:12,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:12,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:12,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:12,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:45:12,367 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:12,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:12,368 INFO L85 PathProgramCache]: Analyzing trace with hash -683448628, now seen corresponding path program 1 times [2024-06-14 12:45:12,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:12,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874315662] [2024-06-14 12:45:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:12,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:15,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:15,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874315662] [2024-06-14 12:45:15,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874315662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:15,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:15,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:45:15,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899676423] [2024-06-14 12:45:15,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:15,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:45:15,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:45:15,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:45:15,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:15,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 1884 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:15,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:15,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:15,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:16,400 INFO L124 PetriNetUnfolderBase]: 2532/4221 cut-off events. [2024-06-14 12:45:16,400 INFO L125 PetriNetUnfolderBase]: For 103244/103266 co-relation queries the response was YES. [2024-06-14 12:45:16,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22548 conditions, 4221 events. 2532/4221 cut-off events. For 103244/103266 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25866 event pairs, 549 based on Foata normal form. 26/4247 useless extension candidates. Maximal degree in co-relation 22480. Up to 3676 conditions per place. [2024-06-14 12:45:16,429 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 183 selfloop transitions, 45 changer transitions 0/233 dead transitions. [2024-06-14 12:45:16,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 233 transitions, 2718 flow [2024-06-14 12:45:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:45:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:45:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:45:16,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:45:16,431 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 1884 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:45:16,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 233 transitions, 2718 flow [2024-06-14 12:45:16,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 233 transitions, 2677 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:45:16,538 INFO L231 Difference]: Finished difference. Result has 150 places, 197 transitions, 2096 flow [2024-06-14 12:45:16,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2096, PETRI_PLACES=150, PETRI_TRANSITIONS=197} [2024-06-14 12:45:16,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 12:45:16,539 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 197 transitions, 2096 flow [2024-06-14 12:45:16,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:16,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:16,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:16,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:45:16,540 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:16,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash 160933539, now seen corresponding path program 1 times [2024-06-14 12:45:16,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:16,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360417994] [2024-06-14 12:45:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:16,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360417994] [2024-06-14 12:45:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360417994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:20,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:20,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:45:20,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551993308] [2024-06-14 12:45:20,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:45:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:45:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:45:20,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:20,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 197 transitions, 2096 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:20,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:20,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:20,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:22,549 INFO L124 PetriNetUnfolderBase]: 2628/4395 cut-off events. [2024-06-14 12:45:22,550 INFO L125 PetriNetUnfolderBase]: For 115694/115700 co-relation queries the response was YES. [2024-06-14 12:45:22,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24037 conditions, 4395 events. 2628/4395 cut-off events. For 115694/115700 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27141 event pairs, 586 based on Foata normal form. 16/4410 useless extension candidates. Maximal degree in co-relation 23967. Up to 3134 conditions per place. [2024-06-14 12:45:22,583 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 162 selfloop transitions, 102 changer transitions 0/269 dead transitions. [2024-06-14 12:45:22,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 269 transitions, 2923 flow [2024-06-14 12:45:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:45:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:45:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-14 12:45:22,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:45:22,588 INFO L175 Difference]: Start difference. First operand has 150 places, 197 transitions, 2096 flow. Second operand 12 states and 220 transitions. [2024-06-14 12:45:22,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 269 transitions, 2923 flow [2024-06-14 12:45:22,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 269 transitions, 2821 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:45:22,711 INFO L231 Difference]: Finished difference. Result has 160 places, 204 transitions, 2319 flow [2024-06-14 12:45:22,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2319, PETRI_PLACES=160, PETRI_TRANSITIONS=204} [2024-06-14 12:45:22,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 12:45:22,713 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 204 transitions, 2319 flow [2024-06-14 12:45:22,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:22,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:22,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:22,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:45:22,714 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:22,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash 891479798, now seen corresponding path program 2 times [2024-06-14 12:45:22,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:22,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660945695] [2024-06-14 12:45:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:22,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660945695] [2024-06-14 12:45:25,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660945695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:25,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:25,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:45:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356455980] [2024-06-14 12:45:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:25,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:45:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:45:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:45:25,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:25,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 204 transitions, 2319 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:25,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:25,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:25,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:26,580 INFO L124 PetriNetUnfolderBase]: 2620/4385 cut-off events. [2024-06-14 12:45:26,581 INFO L125 PetriNetUnfolderBase]: For 115782/115796 co-relation queries the response was YES. [2024-06-14 12:45:26,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24665 conditions, 4385 events. 2620/4385 cut-off events. For 115782/115796 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27217 event pairs, 586 based on Foata normal form. 16/4401 useless extension candidates. Maximal degree in co-relation 24591. Up to 3841 conditions per place. [2024-06-14 12:45:26,615 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 184 selfloop transitions, 38 changer transitions 0/227 dead transitions. [2024-06-14 12:45:26,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 227 transitions, 2903 flow [2024-06-14 12:45:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:45:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:45:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:45:26,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:45:26,617 INFO L175 Difference]: Start difference. First operand has 160 places, 204 transitions, 2319 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:45:26,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 227 transitions, 2903 flow [2024-06-14 12:45:26,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 227 transitions, 2616 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-06-14 12:45:26,789 INFO L231 Difference]: Finished difference. Result has 156 places, 204 transitions, 2116 flow [2024-06-14 12:45:26,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2116, PETRI_PLACES=156, PETRI_TRANSITIONS=204} [2024-06-14 12:45:26,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 12:45:26,790 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 204 transitions, 2116 flow [2024-06-14 12:45:26,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:26,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:26,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:26,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:45:26,791 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:26,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:26,791 INFO L85 PathProgramCache]: Analyzing trace with hash -52769185, now seen corresponding path program 2 times [2024-06-14 12:45:26,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:26,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535611280] [2024-06-14 12:45:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:26,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:30,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:30,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535611280] [2024-06-14 12:45:30,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535611280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:30,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:30,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:45:30,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693902133] [2024-06-14 12:45:30,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:30,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:45:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:45:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:45:30,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:30,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 204 transitions, 2116 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:30,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:30,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:30,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:32,916 INFO L124 PetriNetUnfolderBase]: 2758/4649 cut-off events. [2024-06-14 12:45:32,917 INFO L125 PetriNetUnfolderBase]: For 124431/124439 co-relation queries the response was YES. [2024-06-14 12:45:32,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25172 conditions, 4649 events. 2758/4649 cut-off events. For 124431/124439 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29407 event pairs, 606 based on Foata normal form. 18/4666 useless extension candidates. Maximal degree in co-relation 25100. Up to 3490 conditions per place. [2024-06-14 12:45:33,057 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 159 selfloop transitions, 115 changer transitions 0/279 dead transitions. [2024-06-14 12:45:33,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 279 transitions, 2999 flow [2024-06-14 12:45:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:45:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:45:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-06-14 12:45:33,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4203935599284436 [2024-06-14 12:45:33,059 INFO L175 Difference]: Start difference. First operand has 156 places, 204 transitions, 2116 flow. Second operand 13 states and 235 transitions. [2024-06-14 12:45:33,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 279 transitions, 2999 flow [2024-06-14 12:45:33,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 279 transitions, 2923 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:33,201 INFO L231 Difference]: Finished difference. Result has 165 places, 213 transitions, 2415 flow [2024-06-14 12:45:33,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2415, PETRI_PLACES=165, PETRI_TRANSITIONS=213} [2024-06-14 12:45:33,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-14 12:45:33,201 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 213 transitions, 2415 flow [2024-06-14 12:45:33,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:33,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:33,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:33,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:45:33,202 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:33,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1454615661, now seen corresponding path program 3 times [2024-06-14 12:45:33,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351096815] [2024-06-14 12:45:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:36,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:36,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351096815] [2024-06-14 12:45:36,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351096815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:36,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:36,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:45:36,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419272601] [2024-06-14 12:45:36,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:36,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:45:36,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:45:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:45:37,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:37,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 213 transitions, 2415 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:37,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:37,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:37,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:39,282 INFO L124 PetriNetUnfolderBase]: 2854/4829 cut-off events. [2024-06-14 12:45:39,283 INFO L125 PetriNetUnfolderBase]: For 134186/134194 co-relation queries the response was YES. [2024-06-14 12:45:39,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26788 conditions, 4829 events. 2854/4829 cut-off events. For 134186/134194 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30862 event pairs, 636 based on Foata normal form. 18/4846 useless extension candidates. Maximal degree in co-relation 26713. Up to 3658 conditions per place. [2024-06-14 12:45:39,318 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 159 selfloop transitions, 127 changer transitions 0/291 dead transitions. [2024-06-14 12:45:39,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 291 transitions, 3372 flow [2024-06-14 12:45:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:45:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:45:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 233 transitions. [2024-06-14 12:45:39,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41681574239713776 [2024-06-14 12:45:39,320 INFO L175 Difference]: Start difference. First operand has 165 places, 213 transitions, 2415 flow. Second operand 13 states and 233 transitions. [2024-06-14 12:45:39,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 291 transitions, 3372 flow [2024-06-14 12:45:39,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 291 transitions, 3111 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 12:45:39,474 INFO L231 Difference]: Finished difference. Result has 171 places, 224 transitions, 2609 flow [2024-06-14 12:45:39,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2609, PETRI_PLACES=171, PETRI_TRANSITIONS=224} [2024-06-14 12:45:39,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 12:45:39,475 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 224 transitions, 2609 flow [2024-06-14 12:45:39,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:39,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:39,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:39,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:45:39,475 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:39,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -30319567, now seen corresponding path program 4 times [2024-06-14 12:45:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479494091] [2024-06-14 12:45:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:39,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:43,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479494091] [2024-06-14 12:45:43,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479494091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:43,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:43,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:45:43,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267813389] [2024-06-14 12:45:43,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:43,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:45:43,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:45:43,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:45:43,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:43,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 224 transitions, 2609 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:43,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:43,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:43,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:45,314 INFO L124 PetriNetUnfolderBase]: 2882/4866 cut-off events. [2024-06-14 12:45:45,314 INFO L125 PetriNetUnfolderBase]: For 132025/132029 co-relation queries the response was YES. [2024-06-14 12:45:45,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26850 conditions, 4866 events. 2882/4866 cut-off events. For 132025/132029 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31271 event pairs, 686 based on Foata normal form. 14/4879 useless extension candidates. Maximal degree in co-relation 26772. Up to 3710 conditions per place. [2024-06-14 12:45:45,351 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 121 changer transitions 0/283 dead transitions. [2024-06-14 12:45:45,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 283 transitions, 3372 flow [2024-06-14 12:45:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:45:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:45:45,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-14 12:45:45,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42054263565891475 [2024-06-14 12:45:45,353 INFO L175 Difference]: Start difference. First operand has 171 places, 224 transitions, 2609 flow. Second operand 12 states and 217 transitions. [2024-06-14 12:45:45,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 283 transitions, 3372 flow [2024-06-14 12:45:45,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 283 transitions, 3140 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:45,517 INFO L231 Difference]: Finished difference. Result has 177 places, 225 transitions, 2651 flow [2024-06-14 12:45:45,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2651, PETRI_PLACES=177, PETRI_TRANSITIONS=225} [2024-06-14 12:45:45,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 12:45:45,518 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 225 transitions, 2651 flow [2024-06-14 12:45:45,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:45,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:45,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:45,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:45:45,518 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:45,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2046486179, now seen corresponding path program 5 times [2024-06-14 12:45:45,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:45,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619336578] [2024-06-14 12:45:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:45,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:49,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:49,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619336578] [2024-06-14 12:45:49,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619336578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:49,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:49,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:45:49,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930081616] [2024-06-14 12:45:49,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:49,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:45:49,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:45:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:45:49,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:49,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 225 transitions, 2651 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:49,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:49,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:49,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:51,347 INFO L124 PetriNetUnfolderBase]: 2862/4861 cut-off events. [2024-06-14 12:45:51,347 INFO L125 PetriNetUnfolderBase]: For 126664/126672 co-relation queries the response was YES. [2024-06-14 12:45:51,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26149 conditions, 4861 events. 2862/4861 cut-off events. For 126664/126672 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31201 event pairs, 584 based on Foata normal form. 18/4878 useless extension candidates. Maximal degree in co-relation 26069. Up to 2712 conditions per place. [2024-06-14 12:45:51,389 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 143 selfloop transitions, 139 changer transitions 0/287 dead transitions. [2024-06-14 12:45:51,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 287 transitions, 3353 flow [2024-06-14 12:45:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:45:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:45:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-14 12:45:51,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42054263565891475 [2024-06-14 12:45:51,391 INFO L175 Difference]: Start difference. First operand has 177 places, 225 transitions, 2651 flow. Second operand 12 states and 217 transitions. [2024-06-14 12:45:51,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 287 transitions, 3353 flow [2024-06-14 12:45:51,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 287 transitions, 2922 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-14 12:45:51,564 INFO L231 Difference]: Finished difference. Result has 176 places, 224 transitions, 2432 flow [2024-06-14 12:45:51,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2432, PETRI_PLACES=176, PETRI_TRANSITIONS=224} [2024-06-14 12:45:51,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-14 12:45:51,565 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 224 transitions, 2432 flow [2024-06-14 12:45:51,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-14 12:45:51,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:51,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:51,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:45:51,565 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:51,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1273480820, now seen corresponding path program 3 times [2024-06-14 12:45:51,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:51,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143209462] [2024-06-14 12:45:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:51,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:53,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:53,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143209462] [2024-06-14 12:45:53,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143209462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:53,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:53,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:45:53,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387404596] [2024-06-14 12:45:53,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:53,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:45:53,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:45:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:45:53,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:53,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 224 transitions, 2432 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:53,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:53,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:53,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:55,482 INFO L124 PetriNetUnfolderBase]: 2870/4887 cut-off events. [2024-06-14 12:45:55,483 INFO L125 PetriNetUnfolderBase]: For 122529/122553 co-relation queries the response was YES. [2024-06-14 12:45:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25608 conditions, 4887 events. 2870/4887 cut-off events. For 122529/122553 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31658 event pairs, 668 based on Foata normal form. 20/4906 useless extension candidates. Maximal degree in co-relation 25529. Up to 4196 conditions per place. [2024-06-14 12:45:55,518 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 194 selfloop transitions, 51 changer transitions 0/250 dead transitions. [2024-06-14 12:45:55,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 250 transitions, 3244 flow [2024-06-14 12:45:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:45:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:45:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:45:55,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:45:55,520 INFO L175 Difference]: Start difference. First operand has 176 places, 224 transitions, 2432 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:45:55,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 250 transitions, 3244 flow [2024-06-14 12:45:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 250 transitions, 2882 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 12:45:55,697 INFO L231 Difference]: Finished difference. Result has 173 places, 232 transitions, 2302 flow [2024-06-14 12:45:55,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2302, PETRI_PLACES=173, PETRI_TRANSITIONS=232} [2024-06-14 12:45:55,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 12:45:55,698 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 232 transitions, 2302 flow [2024-06-14 12:45:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:55,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:55,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:55,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:45:55,699 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:55,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1286997484, now seen corresponding path program 1 times [2024-06-14 12:45:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:55,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581896853] [2024-06-14 12:45:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:57,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:57,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581896853] [2024-06-14 12:45:57,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581896853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:57,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:57,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:45:57,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424478792] [2024-06-14 12:45:57,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:57,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:45:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:45:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:45:57,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:45:57,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 232 transitions, 2302 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:57,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:57,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:45:57,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:59,425 INFO L124 PetriNetUnfolderBase]: 2880/4904 cut-off events. [2024-06-14 12:45:59,425 INFO L125 PetriNetUnfolderBase]: For 125957/125959 co-relation queries the response was YES. [2024-06-14 12:45:59,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25177 conditions, 4904 events. 2880/4904 cut-off events. For 125957/125959 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31806 event pairs, 705 based on Foata normal form. 2/4906 useless extension candidates. Maximal degree in co-relation 25097. Up to 4480 conditions per place. [2024-06-14 12:45:59,459 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 234 selfloop transitions, 24 changer transitions 0/263 dead transitions. [2024-06-14 12:45:59,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 263 transitions, 3044 flow [2024-06-14 12:45:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:45:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:45:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:45:59,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 12:45:59,461 INFO L175 Difference]: Start difference. First operand has 173 places, 232 transitions, 2302 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:45:59,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 263 transitions, 3044 flow [2024-06-14 12:45:59,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 263 transitions, 2925 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 12:45:59,620 INFO L231 Difference]: Finished difference. Result has 177 places, 238 transitions, 2315 flow [2024-06-14 12:45:59,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2315, PETRI_PLACES=177, PETRI_TRANSITIONS=238} [2024-06-14 12:45:59,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 12:45:59,621 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 238 transitions, 2315 flow [2024-06-14 12:45:59,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:45:59,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:59,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:45:59,622 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:59,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1068937674, now seen corresponding path program 2 times [2024-06-14 12:45:59,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:59,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053714416] [2024-06-14 12:45:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:01,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053714416] [2024-06-14 12:46:01,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053714416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:01,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531340329] [2024-06-14 12:46:01,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:01,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:01,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:01,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 238 transitions, 2315 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:01,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:01,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:01,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:02,964 INFO L124 PetriNetUnfolderBase]: 2890/4906 cut-off events. [2024-06-14 12:46:02,964 INFO L125 PetriNetUnfolderBase]: For 131652/131654 co-relation queries the response was YES. [2024-06-14 12:46:02,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25510 conditions, 4906 events. 2890/4906 cut-off events. For 131652/131654 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31690 event pairs, 705 based on Foata normal form. 2/4908 useless extension candidates. Maximal degree in co-relation 25428. Up to 4490 conditions per place. [2024-06-14 12:46:03,012 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 231 selfloop transitions, 26 changer transitions 0/262 dead transitions. [2024-06-14 12:46:03,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 262 transitions, 3015 flow [2024-06-14 12:46:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:46:03,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:46:03,018 INFO L175 Difference]: Start difference. First operand has 177 places, 238 transitions, 2315 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:46:03,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 262 transitions, 3015 flow [2024-06-14 12:46:03,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 262 transitions, 2943 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:03,234 INFO L231 Difference]: Finished difference. Result has 181 places, 241 transitions, 2343 flow [2024-06-14 12:46:03,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2343, PETRI_PLACES=181, PETRI_TRANSITIONS=241} [2024-06-14 12:46:03,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 12:46:03,235 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 241 transitions, 2343 flow [2024-06-14 12:46:03,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:03,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:03,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:03,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:46:03,236 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:03,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:03,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1504385994, now seen corresponding path program 3 times [2024-06-14 12:46:03,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:03,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869684367] [2024-06-14 12:46:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:03,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:05,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869684367] [2024-06-14 12:46:05,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869684367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:05,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:05,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432384746] [2024-06-14 12:46:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:05,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:05,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:05,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 241 transitions, 2343 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:05,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:05,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:05,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:06,654 INFO L124 PetriNetUnfolderBase]: 2884/4900 cut-off events. [2024-06-14 12:46:06,654 INFO L125 PetriNetUnfolderBase]: For 134850/134854 co-relation queries the response was YES. [2024-06-14 12:46:06,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25501 conditions, 4900 events. 2884/4900 cut-off events. For 134850/134854 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31644 event pairs, 711 based on Foata normal form. 4/4904 useless extension candidates. Maximal degree in co-relation 25417. Up to 4485 conditions per place. [2024-06-14 12:46:06,698 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 225 selfloop transitions, 26 changer transitions 0/256 dead transitions. [2024-06-14 12:46:06,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 256 transitions, 2883 flow [2024-06-14 12:46:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:46:06,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 12:46:06,700 INFO L175 Difference]: Start difference. First operand has 181 places, 241 transitions, 2343 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:46:06,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 256 transitions, 2883 flow [2024-06-14 12:46:06,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 256 transitions, 2815 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:06,896 INFO L231 Difference]: Finished difference. Result has 184 places, 241 transitions, 2333 flow [2024-06-14 12:46:06,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2333, PETRI_PLACES=184, PETRI_TRANSITIONS=241} [2024-06-14 12:46:06,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:46:06,897 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 241 transitions, 2333 flow [2024-06-14 12:46:06,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:06,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:06,897 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] [2024-06-14 12:46:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:46:06,897 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:06,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash 291445392, now seen corresponding path program 1 times [2024-06-14 12:46:06,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:06,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681771367] [2024-06-14 12:46:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:09,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681771367] [2024-06-14 12:46:09,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681771367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:09,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:09,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:09,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816232631] [2024-06-14 12:46:09,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:09,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:09,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:09,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:09,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:09,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 241 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:09,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:09,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:09,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:11,217 INFO L124 PetriNetUnfolderBase]: 2920/4934 cut-off events. [2024-06-14 12:46:11,218 INFO L125 PetriNetUnfolderBase]: For 144329/144335 co-relation queries the response was YES. [2024-06-14 12:46:11,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25950 conditions, 4934 events. 2920/4934 cut-off events. For 144329/144335 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31775 event pairs, 650 based on Foata normal form. 8/4942 useless extension candidates. Maximal degree in co-relation 25865. Up to 4318 conditions per place. [2024-06-14 12:46:11,258 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 224 selfloop transitions, 51 changer transitions 0/280 dead transitions. [2024-06-14 12:46:11,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 280 transitions, 3243 flow [2024-06-14 12:46:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:46:11,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:46:11,260 INFO L175 Difference]: Start difference. First operand has 184 places, 241 transitions, 2333 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:46:11,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 280 transitions, 3243 flow [2024-06-14 12:46:11,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 280 transitions, 3167 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:11,443 INFO L231 Difference]: Finished difference. Result has 186 places, 248 transitions, 2452 flow [2024-06-14 12:46:11,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2452, PETRI_PLACES=186, PETRI_TRANSITIONS=248} [2024-06-14 12:46:11,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 12:46:11,444 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 248 transitions, 2452 flow [2024-06-14 12:46:11,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:11,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:11,444 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] [2024-06-14 12:46:11,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:46:11,444 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:11,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 929511104, now seen corresponding path program 2 times [2024-06-14 12:46:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:11,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446825359] [2024-06-14 12:46:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:13,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:13,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446825359] [2024-06-14 12:46:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446825359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:13,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:13,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787185765] [2024-06-14 12:46:13,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:14,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:14,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:14,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 248 transitions, 2452 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:14,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:14,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:14,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:15,257 INFO L124 PetriNetUnfolderBase]: 2908/4930 cut-off events. [2024-06-14 12:46:15,257 INFO L125 PetriNetUnfolderBase]: For 145643/145657 co-relation queries the response was YES. [2024-06-14 12:46:15,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26005 conditions, 4930 events. 2908/4930 cut-off events. For 145643/145657 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31895 event pairs, 652 based on Foata normal form. 16/4946 useless extension candidates. Maximal degree in co-relation 25919. Up to 4310 conditions per place. [2024-06-14 12:46:15,301 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 44 changer transitions 0/271 dead transitions. [2024-06-14 12:46:15,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 271 transitions, 3144 flow [2024-06-14 12:46:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:46:15,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 12:46:15,305 INFO L175 Difference]: Start difference. First operand has 186 places, 248 transitions, 2452 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:46:15,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 271 transitions, 3144 flow [2024-06-14 12:46:15,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 271 transitions, 3036 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:15,545 INFO L231 Difference]: Finished difference. Result has 188 places, 248 transitions, 2441 flow [2024-06-14 12:46:15,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2441, PETRI_PLACES=188, PETRI_TRANSITIONS=248} [2024-06-14 12:46:15,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-14 12:46:15,546 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 248 transitions, 2441 flow [2024-06-14 12:46:15,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:15,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:15,546 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] [2024-06-14 12:46:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:46:15,547 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:15,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1866084520, now seen corresponding path program 1 times [2024-06-14 12:46:15,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:15,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259025858] [2024-06-14 12:46:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259025858] [2024-06-14 12:46:18,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259025858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:18,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187168807] [2024-06-14 12:46:18,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:19,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:46:19,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 248 transitions, 2441 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:19,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:19,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:46:19,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:20,251 INFO L124 PetriNetUnfolderBase]: 2785/4754 cut-off events. [2024-06-14 12:46:20,251 INFO L125 PetriNetUnfolderBase]: For 152632/152664 co-relation queries the response was YES. [2024-06-14 12:46:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25290 conditions, 4754 events. 2785/4754 cut-off events. For 152632/152664 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31102 event pairs, 640 based on Foata normal form. 19/4729 useless extension candidates. Maximal degree in co-relation 25203. Up to 4254 conditions per place. [2024-06-14 12:46:20,293 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 235 selfloop transitions, 15 changer transitions 0/273 dead transitions. [2024-06-14 12:46:20,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 273 transitions, 3051 flow [2024-06-14 12:46:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:46:20,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 12:46:20,294 INFO L175 Difference]: Start difference. First operand has 188 places, 248 transitions, 2441 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:46:20,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 273 transitions, 3051 flow [2024-06-14 12:46:20,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 273 transitions, 2963 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:46:20,529 INFO L231 Difference]: Finished difference. Result has 189 places, 250 transitions, 2434 flow [2024-06-14 12:46:20,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2434, PETRI_PLACES=189, PETRI_TRANSITIONS=250} [2024-06-14 12:46:20,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-14 12:46:20,529 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 250 transitions, 2434 flow [2024-06-14 12:46:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:20,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:20,530 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] [2024-06-14 12:46:20,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:46:20,530 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:20,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1118335906, now seen corresponding path program 3 times [2024-06-14 12:46:20,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:20,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586556454] [2024-06-14 12:46:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:20,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:23,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:23,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586556454] [2024-06-14 12:46:23,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586556454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:23,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:23,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:23,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092233932] [2024-06-14 12:46:23,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:23,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:23,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:23,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:23,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 250 transitions, 2434 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:23,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:23,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:23,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:24,433 INFO L124 PetriNetUnfolderBase]: 2906/4913 cut-off events. [2024-06-14 12:46:24,433 INFO L125 PetriNetUnfolderBase]: For 152479/152485 co-relation queries the response was YES. [2024-06-14 12:46:24,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25997 conditions, 4913 events. 2906/4913 cut-off events. For 152479/152485 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31622 event pairs, 664 based on Foata normal form. 6/4918 useless extension candidates. Maximal degree in co-relation 25909. Up to 4402 conditions per place. [2024-06-14 12:46:24,468 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 233 selfloop transitions, 35 changer transitions 0/273 dead transitions. [2024-06-14 12:46:24,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 273 transitions, 3042 flow [2024-06-14 12:46:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:46:24,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:46:24,470 INFO L175 Difference]: Start difference. First operand has 189 places, 250 transitions, 2434 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:46:24,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 273 transitions, 3042 flow [2024-06-14 12:46:24,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 273 transitions, 2961 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:24,686 INFO L231 Difference]: Finished difference. Result has 191 places, 250 transitions, 2430 flow [2024-06-14 12:46:24,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2430, PETRI_PLACES=191, PETRI_TRANSITIONS=250} [2024-06-14 12:46:24,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:46:24,687 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 250 transitions, 2430 flow [2024-06-14 12:46:24,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:24,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:24,688 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] [2024-06-14 12:46:24,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:46:24,688 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:24,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1010183438, now seen corresponding path program 4 times [2024-06-14 12:46:24,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:24,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105089077] [2024-06-14 12:46:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:27,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105089077] [2024-06-14 12:46:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105089077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:27,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:27,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963795862] [2024-06-14 12:46:27,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:27,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:27,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 250 transitions, 2430 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:27,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:27,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:27,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:28,719 INFO L124 PetriNetUnfolderBase]: 2916/4924 cut-off events. [2024-06-14 12:46:28,719 INFO L125 PetriNetUnfolderBase]: For 157763/157771 co-relation queries the response was YES. [2024-06-14 12:46:28,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26233 conditions, 4924 events. 2916/4924 cut-off events. For 157763/157771 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31668 event pairs, 653 based on Foata normal form. 8/4931 useless extension candidates. Maximal degree in co-relation 26144. Up to 4243 conditions per place. [2024-06-14 12:46:28,762 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 204 selfloop transitions, 67 changer transitions 0/276 dead transitions. [2024-06-14 12:46:28,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 276 transitions, 3176 flow [2024-06-14 12:46:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:46:28,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:46:28,764 INFO L175 Difference]: Start difference. First operand has 191 places, 250 transitions, 2430 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:46:28,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 276 transitions, 3176 flow [2024-06-14 12:46:29,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 276 transitions, 3063 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:29,036 INFO L231 Difference]: Finished difference. Result has 191 places, 253 transitions, 2493 flow [2024-06-14 12:46:29,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2493, PETRI_PLACES=191, PETRI_TRANSITIONS=253} [2024-06-14 12:46:29,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:46:29,036 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 253 transitions, 2493 flow [2024-06-14 12:46:29,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:29,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:29,037 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] [2024-06-14 12:46:29,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:46:29,037 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:29,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:29,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1686009898, now seen corresponding path program 5 times [2024-06-14 12:46:29,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:29,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091830095] [2024-06-14 12:46:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:29,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091830095] [2024-06-14 12:46:31,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091830095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:31,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:31,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:31,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819125756] [2024-06-14 12:46:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:31,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:31,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:31,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:31,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 253 transitions, 2493 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:31,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:31,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:31,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:32,965 INFO L124 PetriNetUnfolderBase]: 2926/4953 cut-off events. [2024-06-14 12:46:32,965 INFO L125 PetriNetUnfolderBase]: For 163952/163976 co-relation queries the response was YES. [2024-06-14 12:46:32,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26560 conditions, 4953 events. 2926/4953 cut-off events. For 163952/163976 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31943 event pairs, 670 based on Foata normal form. 18/4970 useless extension candidates. Maximal degree in co-relation 26470. Up to 4249 conditions per place. [2024-06-14 12:46:33,011 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 204 selfloop transitions, 64 changer transitions 0/273 dead transitions. [2024-06-14 12:46:33,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 273 transitions, 3221 flow [2024-06-14 12:46:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:46:33,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:46:33,012 INFO L175 Difference]: Start difference. First operand has 191 places, 253 transitions, 2493 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:46:33,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 273 transitions, 3221 flow [2024-06-14 12:46:33,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 273 transitions, 3105 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:33,354 INFO L231 Difference]: Finished difference. Result has 194 places, 256 transitions, 2553 flow [2024-06-14 12:46:33,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2553, PETRI_PLACES=194, PETRI_TRANSITIONS=256} [2024-06-14 12:46:33,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-14 12:46:33,356 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 256 transitions, 2553 flow [2024-06-14 12:46:33,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:33,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:33,356 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] [2024-06-14 12:46:33,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:46:33,356 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:33,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash 823205386, now seen corresponding path program 6 times [2024-06-14 12:46:33,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:33,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004305641] [2024-06-14 12:46:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:33,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:35,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:35,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004305641] [2024-06-14 12:46:35,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004305641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:35,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:35,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:35,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678979240] [2024-06-14 12:46:35,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:35,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:35,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:35,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:35,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:35,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:35,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 256 transitions, 2553 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:35,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:35,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:35,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:37,621 INFO L124 PetriNetUnfolderBase]: 2910/4929 cut-off events. [2024-06-14 12:46:37,622 INFO L125 PetriNetUnfolderBase]: For 167103/167127 co-relation queries the response was YES. [2024-06-14 12:46:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26324 conditions, 4929 events. 2910/4929 cut-off events. For 167103/167127 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31790 event pairs, 667 based on Foata normal form. 20/4948 useless extension candidates. Maximal degree in co-relation 26233. Up to 4236 conditions per place. [2024-06-14 12:46:37,669 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 207 selfloop transitions, 60 changer transitions 0/272 dead transitions. [2024-06-14 12:46:37,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3131 flow [2024-06-14 12:46:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:46:37,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:46:37,671 INFO L175 Difference]: Start difference. First operand has 194 places, 256 transitions, 2553 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:46:37,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3131 flow [2024-06-14 12:46:37,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 272 transitions, 2944 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:37,932 INFO L231 Difference]: Finished difference. Result has 196 places, 256 transitions, 2494 flow [2024-06-14 12:46:37,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2494, PETRI_PLACES=196, PETRI_TRANSITIONS=256} [2024-06-14 12:46:37,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 12:46:37,933 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 256 transitions, 2494 flow [2024-06-14 12:46:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 12:46:37,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:37,933 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] [2024-06-14 12:46:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:46:37,934 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:37,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 892325962, now seen corresponding path program 2 times [2024-06-14 12:46:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:37,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407647505] [2024-06-14 12:46:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:41,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407647505] [2024-06-14 12:46:41,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407647505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:41,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:41,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145662735] [2024-06-14 12:46:41,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:41,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:41,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:46:41,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 256 transitions, 2494 flow. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:41,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:41,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:46:41,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:42,677 INFO L124 PetriNetUnfolderBase]: 2789/4772 cut-off events. [2024-06-14 12:46:42,677 INFO L125 PetriNetUnfolderBase]: For 173527/173559 co-relation queries the response was YES. [2024-06-14 12:46:42,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25633 conditions, 4772 events. 2789/4772 cut-off events. For 173527/173559 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31337 event pairs, 624 based on Foata normal form. 23/4762 useless extension candidates. Maximal degree in co-relation 25541. Up to 4246 conditions per place. [2024-06-14 12:46:42,725 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 230 selfloop transitions, 20 changer transitions 0/275 dead transitions. [2024-06-14 12:46:42,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 275 transitions, 3090 flow [2024-06-14 12:46:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:46:42,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:46:42,727 INFO L175 Difference]: Start difference. First operand has 196 places, 256 transitions, 2494 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:46:42,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 275 transitions, 3090 flow [2024-06-14 12:46:43,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 275 transitions, 2943 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:43,022 INFO L231 Difference]: Finished difference. Result has 196 places, 258 transitions, 2442 flow [2024-06-14 12:46:43,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2442, PETRI_PLACES=196, PETRI_TRANSITIONS=258} [2024-06-14 12:46:43,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 12:46:43,023 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 258 transitions, 2442 flow [2024-06-14 12:46:43,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:43,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:43,023 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] [2024-06-14 12:46:43,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:46:43,023 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:43,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:43,024 INFO L85 PathProgramCache]: Analyzing trace with hash 892801192, now seen corresponding path program 3 times [2024-06-14 12:46:43,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:43,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476098227] [2024-06-14 12:46:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:43,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476098227] [2024-06-14 12:46:46,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476098227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:46,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:46,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:46,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777344605] [2024-06-14 12:46:46,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:46,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:46,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:46,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:46,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:46,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:46:46,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 258 transitions, 2442 flow. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:46,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:46,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:46:46,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:47,413 INFO L124 PetriNetUnfolderBase]: 2782/4763 cut-off events. [2024-06-14 12:46:47,413 INFO L125 PetriNetUnfolderBase]: For 176743/176775 co-relation queries the response was YES. [2024-06-14 12:46:47,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25440 conditions, 4763 events. 2782/4763 cut-off events. For 176743/176775 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31305 event pairs, 623 based on Foata normal form. 23/4753 useless extension candidates. Maximal degree in co-relation 25347. Up to 4219 conditions per place. [2024-06-14 12:46:47,453 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 227 selfloop transitions, 25 changer transitions 0/277 dead transitions. [2024-06-14 12:46:47,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 277 transitions, 3046 flow [2024-06-14 12:46:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:46:47,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:46:47,454 INFO L175 Difference]: Start difference. First operand has 196 places, 258 transitions, 2442 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:46:47,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 277 transitions, 3046 flow [2024-06-14 12:46:47,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 2967 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:47,681 INFO L231 Difference]: Finished difference. Result has 198 places, 260 transitions, 2472 flow [2024-06-14 12:46:47,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2472, PETRI_PLACES=198, PETRI_TRANSITIONS=260} [2024-06-14 12:46:47,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-14 12:46:47,681 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 260 transitions, 2472 flow [2024-06-14 12:46:47,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:47,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:47,682 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] [2024-06-14 12:46:47,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:46:47,682 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:47,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1227430226, now seen corresponding path program 1 times [2024-06-14 12:46:47,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:47,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95277862] [2024-06-14 12:46:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:47,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:50,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95277862] [2024-06-14 12:46:50,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95277862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:50,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:50,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799009226] [2024-06-14 12:46:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:50,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:50,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 260 transitions, 2472 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:50,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:50,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:50,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:51,793 INFO L124 PetriNetUnfolderBase]: 2923/4955 cut-off events. [2024-06-14 12:46:51,794 INFO L125 PetriNetUnfolderBase]: For 178885/178887 co-relation queries the response was YES. [2024-06-14 12:46:51,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26448 conditions, 4955 events. 2923/4955 cut-off events. For 178885/178887 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32012 event pairs, 720 based on Foata normal form. 2/4957 useless extension candidates. Maximal degree in co-relation 26354. Up to 4567 conditions per place. [2024-06-14 12:46:51,845 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 267 selfloop transitions, 17 changer transitions 0/289 dead transitions. [2024-06-14 12:46:51,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 289 transitions, 3150 flow [2024-06-14 12:46:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:46:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:46:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:46:51,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:46:51,847 INFO L175 Difference]: Start difference. First operand has 198 places, 260 transitions, 2472 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:46:51,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 289 transitions, 3150 flow [2024-06-14 12:46:52,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 289 transitions, 3057 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:52,090 INFO L231 Difference]: Finished difference. Result has 201 places, 263 transitions, 2463 flow [2024-06-14 12:46:52,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2463, PETRI_PLACES=201, PETRI_TRANSITIONS=263} [2024-06-14 12:46:52,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 12:46:52,091 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 263 transitions, 2463 flow [2024-06-14 12:46:52,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:52,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:52,091 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] [2024-06-14 12:46:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:46:52,091 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:52,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1231701654, now seen corresponding path program 2 times [2024-06-14 12:46:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:52,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637548717] [2024-06-14 12:46:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:54,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:54,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637548717] [2024-06-14 12:46:54,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637548717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:54,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:54,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841767458] [2024-06-14 12:46:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:54,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:54,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:54,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:54,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 263 transitions, 2463 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:54,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:54,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:54,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:56,175 INFO L124 PetriNetUnfolderBase]: 2933/4971 cut-off events. [2024-06-14 12:46:56,175 INFO L125 PetriNetUnfolderBase]: For 184129/184131 co-relation queries the response was YES. [2024-06-14 12:46:56,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26866 conditions, 4971 events. 2933/4971 cut-off events. For 184129/184131 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32160 event pairs, 701 based on Foata normal form. 2/4973 useless extension candidates. Maximal degree in co-relation 26771. Up to 4516 conditions per place. [2024-06-14 12:46:56,221 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 255 selfloop transitions, 36 changer transitions 0/296 dead transitions. [2024-06-14 12:46:56,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 296 transitions, 3317 flow [2024-06-14 12:46:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:46:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:46:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:46:56,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:46:56,222 INFO L175 Difference]: Start difference. First operand has 201 places, 263 transitions, 2463 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:46:56,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 296 transitions, 3317 flow [2024-06-14 12:46:56,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 3255 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:46:56,460 INFO L231 Difference]: Finished difference. Result has 203 places, 269 transitions, 2573 flow [2024-06-14 12:46:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2573, PETRI_PLACES=203, PETRI_TRANSITIONS=269} [2024-06-14 12:46:56,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 12:46:56,461 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 269 transitions, 2573 flow [2024-06-14 12:46:56,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:56,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:56,461 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] [2024-06-14 12:46:56,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:46:56,462 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:56,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1227060024, now seen corresponding path program 3 times [2024-06-14 12:46:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919717426] [2024-06-14 12:46:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:58,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:58,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919717426] [2024-06-14 12:46:58,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919717426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:58,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:58,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548245956] [2024-06-14 12:46:58,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:58,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:58,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 269 transitions, 2573 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:58,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:58,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:58,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:00,582 INFO L124 PetriNetUnfolderBase]: 2943/4989 cut-off events. [2024-06-14 12:47:00,583 INFO L125 PetriNetUnfolderBase]: For 191887/191889 co-relation queries the response was YES. [2024-06-14 12:47:00,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27418 conditions, 4989 events. 2943/4989 cut-off events. For 191887/191889 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32285 event pairs, 703 based on Foata normal form. 2/4991 useless extension candidates. Maximal degree in co-relation 27322. Up to 4526 conditions per place. [2024-06-14 12:47:00,630 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 252 selfloop transitions, 38 changer transitions 0/295 dead transitions. [2024-06-14 12:47:00,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 295 transitions, 3377 flow [2024-06-14 12:47:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:47:00,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:47:00,632 INFO L175 Difference]: Start difference. First operand has 203 places, 269 transitions, 2573 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:47:00,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 295 transitions, 3377 flow [2024-06-14 12:47:00,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 295 transitions, 3297 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:47:00,885 INFO L231 Difference]: Finished difference. Result has 207 places, 272 transitions, 2625 flow [2024-06-14 12:47:00,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2625, PETRI_PLACES=207, PETRI_TRANSITIONS=272} [2024-06-14 12:47:00,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 12:47:00,885 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 272 transitions, 2625 flow [2024-06-14 12:47:00,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:00,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:00,886 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] [2024-06-14 12:47:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:47:00,886 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:00,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash 656335114, now seen corresponding path program 1 times [2024-06-14 12:47:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:00,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197121684] [2024-06-14 12:47:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:03,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:03,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197121684] [2024-06-14 12:47:03,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197121684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:03,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:03,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:03,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954837764] [2024-06-14 12:47:03,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:03,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:03,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:03,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:03,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:03,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 272 transitions, 2625 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:03,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:03,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:03,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:04,976 INFO L124 PetriNetUnfolderBase]: 2951/5001 cut-off events. [2024-06-14 12:47:04,977 INFO L125 PetriNetUnfolderBase]: For 197989/197991 co-relation queries the response was YES. [2024-06-14 12:47:05,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27656 conditions, 5001 events. 2951/5001 cut-off events. For 197989/197991 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32378 event pairs, 705 based on Foata normal form. 2/5003 useless extension candidates. Maximal degree in co-relation 27558. Up to 4609 conditions per place. [2024-06-14 12:47:05,025 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 271 selfloop transitions, 18 changer transitions 0/294 dead transitions. [2024-06-14 12:47:05,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 294 transitions, 3289 flow [2024-06-14 12:47:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:47:05,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:47:05,033 INFO L175 Difference]: Start difference. First operand has 207 places, 272 transitions, 2625 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:47:05,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 294 transitions, 3289 flow [2024-06-14 12:47:05,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 294 transitions, 3203 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:05,389 INFO L231 Difference]: Finished difference. Result has 209 places, 274 transitions, 2618 flow [2024-06-14 12:47:05,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2539, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2618, PETRI_PLACES=209, PETRI_TRANSITIONS=274} [2024-06-14 12:47:05,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 12:47:05,390 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 274 transitions, 2618 flow [2024-06-14 12:47:05,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:05,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:05,390 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] [2024-06-14 12:47:05,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:47:05,390 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:05,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1694298988, now seen corresponding path program 2 times [2024-06-14 12:47:05,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:05,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716750223] [2024-06-14 12:47:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:05,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:08,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:08,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716750223] [2024-06-14 12:47:08,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716750223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:08,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:08,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:08,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728492730] [2024-06-14 12:47:08,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:08,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:08,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:08,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:08,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:08,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:08,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 274 transitions, 2618 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:08,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:08,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:09,643 INFO L124 PetriNetUnfolderBase]: 2959/5014 cut-off events. [2024-06-14 12:47:09,643 INFO L125 PetriNetUnfolderBase]: For 204766/204770 co-relation queries the response was YES. [2024-06-14 12:47:09,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27837 conditions, 5014 events. 2959/5014 cut-off events. For 204766/204770 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32448 event pairs, 706 based on Foata normal form. 4/5018 useless extension candidates. Maximal degree in co-relation 27738. Up to 4621 conditions per place. [2024-06-14 12:47:09,688 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 268 selfloop transitions, 18 changer transitions 0/291 dead transitions. [2024-06-14 12:47:09,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 291 transitions, 3266 flow [2024-06-14 12:47:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:47:09,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:47:09,690 INFO L175 Difference]: Start difference. First operand has 209 places, 274 transitions, 2618 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:47:09,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 291 transitions, 3266 flow [2024-06-14 12:47:10,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 291 transitions, 3203 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:10,062 INFO L231 Difference]: Finished difference. Result has 211 places, 276 transitions, 2638 flow [2024-06-14 12:47:10,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2638, PETRI_PLACES=211, PETRI_TRANSITIONS=276} [2024-06-14 12:47:10,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-14 12:47:10,063 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 276 transitions, 2638 flow [2024-06-14 12:47:10,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:10,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:10,063 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] [2024-06-14 12:47:10,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:47:10,064 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:10,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:10,064 INFO L85 PathProgramCache]: Analyzing trace with hash 892807144, now seen corresponding path program 3 times [2024-06-14 12:47:10,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:10,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394716194] [2024-06-14 12:47:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:10,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:12,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:12,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394716194] [2024-06-14 12:47:12,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394716194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:12,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:12,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:12,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820754462] [2024-06-14 12:47:12,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:12,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:12,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:12,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 276 transitions, 2638 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:12,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:12,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:12,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:14,212 INFO L124 PetriNetUnfolderBase]: 2954/5007 cut-off events. [2024-06-14 12:47:14,212 INFO L125 PetriNetUnfolderBase]: For 207448/207452 co-relation queries the response was YES. [2024-06-14 12:47:14,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27796 conditions, 5007 events. 2954/5007 cut-off events. For 207448/207452 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32403 event pairs, 703 based on Foata normal form. 4/5011 useless extension candidates. Maximal degree in co-relation 27696. Up to 4594 conditions per place. [2024-06-14 12:47:14,261 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 265 selfloop transitions, 23 changer transitions 0/293 dead transitions. [2024-06-14 12:47:14,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 293 transitions, 3294 flow [2024-06-14 12:47:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:47:14,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:47:14,263 INFO L175 Difference]: Start difference. First operand has 211 places, 276 transitions, 2638 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:47:14,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 293 transitions, 3294 flow [2024-06-14 12:47:14,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 293 transitions, 3227 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:14,655 INFO L231 Difference]: Finished difference. Result has 213 places, 278 transitions, 2668 flow [2024-06-14 12:47:14,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2668, PETRI_PLACES=213, PETRI_TRANSITIONS=278} [2024-06-14 12:47:14,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 12:47:14,656 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 278 transitions, 2668 flow [2024-06-14 12:47:14,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:14,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:14,656 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] [2024-06-14 12:47:14,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:47:14,656 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:14,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:14,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1054570134, now seen corresponding path program 4 times [2024-06-14 12:47:14,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:14,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699354537] [2024-06-14 12:47:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:14,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:17,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:17,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699354537] [2024-06-14 12:47:17,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699354537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:17,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:17,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:17,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018108792] [2024-06-14 12:47:17,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:17,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:17,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:17,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:17,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:17,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:17,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 278 transitions, 2668 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:17,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:17,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:19,015 INFO L124 PetriNetUnfolderBase]: 2948/4999 cut-off events. [2024-06-14 12:47:19,015 INFO L125 PetriNetUnfolderBase]: For 210173/210175 co-relation queries the response was YES. [2024-06-14 12:47:19,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27761 conditions, 4999 events. 2948/4999 cut-off events. For 210173/210175 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32335 event pairs, 719 based on Foata normal form. 2/5000 useless extension candidates. Maximal degree in co-relation 27660. Up to 4538 conditions per place. [2024-06-14 12:47:19,065 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 252 selfloop transitions, 38 changer transitions 0/295 dead transitions. [2024-06-14 12:47:19,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 295 transitions, 3290 flow [2024-06-14 12:47:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:47:19,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:47:19,066 INFO L175 Difference]: Start difference. First operand has 213 places, 278 transitions, 2668 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:47:19,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 295 transitions, 3290 flow [2024-06-14 12:47:19,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 295 transitions, 3189 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:19,436 INFO L231 Difference]: Finished difference. Result has 216 places, 278 transitions, 2649 flow [2024-06-14 12:47:19,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2567, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2649, PETRI_PLACES=216, PETRI_TRANSITIONS=278} [2024-06-14 12:47:19,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 12:47:19,437 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 278 transitions, 2649 flow [2024-06-14 12:47:19,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:19,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:19,437 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, 1] [2024-06-14 12:47:19,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:47:19,438 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:19,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:19,438 INFO L85 PathProgramCache]: Analyzing trace with hash 955699057, now seen corresponding path program 1 times [2024-06-14 12:47:19,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:19,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882940618] [2024-06-14 12:47:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:19,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882940618] [2024-06-14 12:47:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882940618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:22,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:22,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256120757] [2024-06-14 12:47:22,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:22,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:22,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 278 transitions, 2649 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:22,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:22,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:22,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:24,354 INFO L124 PetriNetUnfolderBase]: 3122/5252 cut-off events. [2024-06-14 12:47:24,356 INFO L125 PetriNetUnfolderBase]: For 287431/287451 co-relation queries the response was YES. [2024-06-14 12:47:24,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30831 conditions, 5252 events. 3122/5252 cut-off events. For 287431/287451 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33864 event pairs, 556 based on Foata normal form. 36/5288 useless extension candidates. Maximal degree in co-relation 30729. Up to 4362 conditions per place. [2024-06-14 12:47:24,399 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 266 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-14 12:47:24,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 330 transitions, 3697 flow [2024-06-14 12:47:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:47:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:47:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:47:24,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:47:24,401 INFO L175 Difference]: Start difference. First operand has 216 places, 278 transitions, 2649 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:47:24,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 330 transitions, 3697 flow [2024-06-14 12:47:24,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 330 transitions, 3581 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:47:24,805 INFO L231 Difference]: Finished difference. Result has 218 places, 282 transitions, 2756 flow [2024-06-14 12:47:24,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2756, PETRI_PLACES=218, PETRI_TRANSITIONS=282} [2024-06-14 12:47:24,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 12:47:24,806 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 282 transitions, 2756 flow [2024-06-14 12:47:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:24,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:24,806 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, 1] [2024-06-14 12:47:24,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:47:24,806 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:24,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash 239202393, now seen corresponding path program 2 times [2024-06-14 12:47:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:24,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472321681] [2024-06-14 12:47:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:24,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:27,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:27,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472321681] [2024-06-14 12:47:27,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472321681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:27,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:27,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970744398] [2024-06-14 12:47:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:27,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:27,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:27,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:27,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 282 transitions, 2756 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:27,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:27,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:27,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:29,517 INFO L124 PetriNetUnfolderBase]: 3194/5388 cut-off events. [2024-06-14 12:47:29,517 INFO L125 PetriNetUnfolderBase]: For 307354/307374 co-relation queries the response was YES. [2024-06-14 12:47:29,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32142 conditions, 5388 events. 3194/5388 cut-off events. For 307354/307374 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 35146 event pairs, 702 based on Foata normal form. 40/5428 useless extension candidates. Maximal degree in co-relation 32039. Up to 4670 conditions per place. [2024-06-14 12:47:29,566 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 265 selfloop transitions, 54 changer transitions 0/324 dead transitions. [2024-06-14 12:47:29,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 324 transitions, 3584 flow [2024-06-14 12:47:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:47:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:47:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:47:29,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:47:29,568 INFO L175 Difference]: Start difference. First operand has 218 places, 282 transitions, 2756 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:47:29,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 324 transitions, 3584 flow [2024-06-14 12:47:30,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 324 transitions, 3478 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:30,011 INFO L231 Difference]: Finished difference. Result has 222 places, 284 transitions, 2820 flow [2024-06-14 12:47:30,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2820, PETRI_PLACES=222, PETRI_TRANSITIONS=284} [2024-06-14 12:47:30,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 12:47:30,012 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 284 transitions, 2820 flow [2024-06-14 12:47:30,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:30,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:30,012 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, 1] [2024-06-14 12:47:30,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:47:30,017 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:30,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2013647189, now seen corresponding path program 3 times [2024-06-14 12:47:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:30,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264889855] [2024-06-14 12:47:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:30,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:33,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:33,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264889855] [2024-06-14 12:47:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264889855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:33,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:33,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110711628] [2024-06-14 12:47:33,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:33,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:33,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:33,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 284 transitions, 2820 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:33,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:33,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:33,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:34,553 INFO L124 PetriNetUnfolderBase]: 3148/5314 cut-off events. [2024-06-14 12:47:34,553 INFO L125 PetriNetUnfolderBase]: For 273336/273350 co-relation queries the response was YES. [2024-06-14 12:47:34,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30592 conditions, 5314 events. 3148/5314 cut-off events. For 273336/273350 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34645 event pairs, 695 based on Foata normal form. 32/5346 useless extension candidates. Maximal degree in co-relation 30487. Up to 4604 conditions per place. [2024-06-14 12:47:34,608 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 260 selfloop transitions, 47 changer transitions 0/312 dead transitions. [2024-06-14 12:47:34,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 312 transitions, 3534 flow [2024-06-14 12:47:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:47:34,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:47:34,611 INFO L175 Difference]: Start difference. First operand has 222 places, 284 transitions, 2820 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:47:34,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 312 transitions, 3534 flow [2024-06-14 12:47:35,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 312 transitions, 3380 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 12:47:35,113 INFO L231 Difference]: Finished difference. Result has 222 places, 284 transitions, 2766 flow [2024-06-14 12:47:35,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2766, PETRI_PLACES=222, PETRI_TRANSITIONS=284} [2024-06-14 12:47:35,128 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 12:47:35,129 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 284 transitions, 2766 flow [2024-06-14 12:47:35,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:35,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:35,129 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, 1] [2024-06-14 12:47:35,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:47:35,129 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:35,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1806967151, now seen corresponding path program 1 times [2024-06-14 12:47:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352089330] [2024-06-14 12:47:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:38,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:38,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352089330] [2024-06-14 12:47:38,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352089330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:38,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:38,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092628564] [2024-06-14 12:47:38,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:38,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:38,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:38,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 284 transitions, 2766 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:38,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:38,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:38,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:39,964 INFO L124 PetriNetUnfolderBase]: 3284/5503 cut-off events. [2024-06-14 12:47:39,964 INFO L125 PetriNetUnfolderBase]: For 279006/279012 co-relation queries the response was YES. [2024-06-14 12:47:40,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32210 conditions, 5503 events. 3284/5503 cut-off events. For 279006/279012 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35828 event pairs, 721 based on Foata normal form. 12/5514 useless extension candidates. Maximal degree in co-relation 32104. Up to 4246 conditions per place. [2024-06-14 12:47:40,030 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 193 selfloop transitions, 140 changer transitions 0/338 dead transitions. [2024-06-14 12:47:40,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 338 transitions, 4032 flow [2024-06-14 12:47:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:47:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:47:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-14 12:47:40,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143763213530655 [2024-06-14 12:47:40,032 INFO L175 Difference]: Start difference. First operand has 222 places, 284 transitions, 2766 flow. Second operand 11 states and 196 transitions. [2024-06-14 12:47:40,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 338 transitions, 4032 flow [2024-06-14 12:47:40,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 338 transitions, 3919 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:40,503 INFO L231 Difference]: Finished difference. Result has 227 places, 298 transitions, 3168 flow [2024-06-14 12:47:40,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2653, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3168, PETRI_PLACES=227, PETRI_TRANSITIONS=298} [2024-06-14 12:47:40,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 12:47:40,504 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 298 transitions, 3168 flow [2024-06-14 12:47:40,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:40,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:40,504 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, 1] [2024-06-14 12:47:40,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:47:40,504 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:40,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1515439095, now seen corresponding path program 2 times [2024-06-14 12:47:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:40,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194268516] [2024-06-14 12:47:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:43,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:43,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194268516] [2024-06-14 12:47:43,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194268516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:43,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:43,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37913935] [2024-06-14 12:47:43,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:43,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:43,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:43,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 298 transitions, 3168 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:43,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:43,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:43,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:45,189 INFO L124 PetriNetUnfolderBase]: 3304/5525 cut-off events. [2024-06-14 12:47:45,189 INFO L125 PetriNetUnfolderBase]: For 282476/282478 co-relation queries the response was YES. [2024-06-14 12:47:45,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33732 conditions, 5525 events. 3304/5525 cut-off events. For 282476/282478 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35879 event pairs, 733 based on Foata normal form. 4/5528 useless extension candidates. Maximal degree in co-relation 33624. Up to 4262 conditions per place. [2024-06-14 12:47:45,239 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 190 selfloop transitions, 141 changer transitions 0/336 dead transitions. [2024-06-14 12:47:45,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 336 transitions, 4294 flow [2024-06-14 12:47:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:47:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:47:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:47:45,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:47:45,241 INFO L175 Difference]: Start difference. First operand has 227 places, 298 transitions, 3168 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:47:45,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 336 transitions, 4294 flow [2024-06-14 12:47:45,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 336 transitions, 4073 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:45,744 INFO L231 Difference]: Finished difference. Result has 232 places, 302 transitions, 3314 flow [2024-06-14 12:47:45,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3314, PETRI_PLACES=232, PETRI_TRANSITIONS=302} [2024-06-14 12:47:45,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-14 12:47:45,744 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 302 transitions, 3314 flow [2024-06-14 12:47:45,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:45,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:45,745 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, 1] [2024-06-14 12:47:45,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:47:45,745 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:45,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2013770321, now seen corresponding path program 3 times [2024-06-14 12:47:45,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:45,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600041280] [2024-06-14 12:47:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:45,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600041280] [2024-06-14 12:47:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600041280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:48,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:48,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680010052] [2024-06-14 12:47:48,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:48,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:48,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 302 transitions, 3314 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:48,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:48,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:48,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:50,064 INFO L124 PetriNetUnfolderBase]: 3292/5523 cut-off events. [2024-06-14 12:47:50,064 INFO L125 PetriNetUnfolderBase]: For 280528/280530 co-relation queries the response was YES. [2024-06-14 12:47:50,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33104 conditions, 5523 events. 3292/5523 cut-off events. For 280528/280530 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35933 event pairs, 775 based on Foata normal form. 4/5526 useless extension candidates. Maximal degree in co-relation 32994. Up to 4254 conditions per place. [2024-06-14 12:47:50,118 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 194 selfloop transitions, 128 changer transitions 0/327 dead transitions. [2024-06-14 12:47:50,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 327 transitions, 4186 flow [2024-06-14 12:47:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:47:50,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:47:50,120 INFO L175 Difference]: Start difference. First operand has 232 places, 302 transitions, 3314 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:47:50,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 327 transitions, 4186 flow [2024-06-14 12:47:50,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 327 transitions, 3867 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:50,644 INFO L231 Difference]: Finished difference. Result has 233 places, 302 transitions, 3258 flow [2024-06-14 12:47:50,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3258, PETRI_PLACES=233, PETRI_TRANSITIONS=302} [2024-06-14 12:47:50,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 12:47:50,644 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 302 transitions, 3258 flow [2024-06-14 12:47:50,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:50,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:50,645 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, 1] [2024-06-14 12:47:50,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:47:50,645 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:50,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash 250326867, now seen corresponding path program 1 times [2024-06-14 12:47:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:50,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576421018] [2024-06-14 12:47:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:54,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:54,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576421018] [2024-06-14 12:47:54,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576421018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:54,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:54,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:47:54,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092518116] [2024-06-14 12:47:54,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:54,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:47:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:54,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:47:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:47:54,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:54,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 302 transitions, 3258 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:54,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:54,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:54,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:55,489 INFO L124 PetriNetUnfolderBase]: 3411/5715 cut-off events. [2024-06-14 12:47:55,489 INFO L125 PetriNetUnfolderBase]: For 337426/337440 co-relation queries the response was YES. [2024-06-14 12:47:55,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35196 conditions, 5715 events. 3411/5715 cut-off events. For 337426/337440 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 37512 event pairs, 705 based on Foata normal form. 24/5739 useless extension candidates. Maximal degree in co-relation 35085. Up to 4702 conditions per place. [2024-06-14 12:47:55,550 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 285 selfloop transitions, 47 changer transitions 0/337 dead transitions. [2024-06-14 12:47:55,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 337 transitions, 4284 flow [2024-06-14 12:47:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:47:55,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:47:55,551 INFO L175 Difference]: Start difference. First operand has 233 places, 302 transitions, 3258 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:47:55,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 337 transitions, 4284 flow [2024-06-14 12:47:56,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 337 transitions, 4013 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:47:56,149 INFO L231 Difference]: Finished difference. Result has 234 places, 306 transitions, 3213 flow [2024-06-14 12:47:56,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3213, PETRI_PLACES=234, PETRI_TRANSITIONS=306} [2024-06-14 12:47:56,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-14 12:47:56,150 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 306 transitions, 3213 flow [2024-06-14 12:47:56,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:56,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:56,150 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, 1] [2024-06-14 12:47:56,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:47:56,150 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:56,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1463806293, now seen corresponding path program 4 times [2024-06-14 12:47:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463345] [2024-06-14 12:47:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:58,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:58,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463345] [2024-06-14 12:47:58,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:58,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:58,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:58,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564214587] [2024-06-14 12:47:58,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:58,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:58,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:58,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:58,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:59,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:47:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 306 transitions, 3213 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:59,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:47:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:00,681 INFO L124 PetriNetUnfolderBase]: 3457/5796 cut-off events. [2024-06-14 12:48:00,681 INFO L125 PetriNetUnfolderBase]: For 359098/359122 co-relation queries the response was YES. [2024-06-14 12:48:00,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35535 conditions, 5796 events. 3457/5796 cut-off events. For 359098/359122 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 38039 event pairs, 734 based on Foata normal form. 36/5831 useless extension candidates. Maximal degree in co-relation 35422. Up to 4979 conditions per place. [2024-06-14 12:48:00,741 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 261 selfloop transitions, 64 changer transitions 0/330 dead transitions. [2024-06-14 12:48:00,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 330 transitions, 4005 flow [2024-06-14 12:48:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:48:00,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:48:00,742 INFO L175 Difference]: Start difference. First operand has 234 places, 306 transitions, 3213 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:48:00,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 330 transitions, 4005 flow [2024-06-14 12:48:01,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 330 transitions, 3903 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:01,327 INFO L231 Difference]: Finished difference. Result has 238 places, 308 transitions, 3305 flow [2024-06-14 12:48:01,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3305, PETRI_PLACES=238, PETRI_TRANSITIONS=308} [2024-06-14 12:48:01,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 12:48:01,328 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 308 transitions, 3305 flow [2024-06-14 12:48:01,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:01,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:01,328 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, 1] [2024-06-14 12:48:01,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:48:01,328 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:01,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash 561546923, now seen corresponding path program 4 times [2024-06-14 12:48:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:01,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814095377] [2024-06-14 12:48:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:04,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:04,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814095377] [2024-06-14 12:48:04,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814095377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:04,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:04,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72695630] [2024-06-14 12:48:04,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:04,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:04,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:04,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:04,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:04,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 308 transitions, 3305 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:04,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:04,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:04,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:06,086 INFO L124 PetriNetUnfolderBase]: 3493/5809 cut-off events. [2024-06-14 12:48:06,086 INFO L125 PetriNetUnfolderBase]: For 333788/333792 co-relation queries the response was YES. [2024-06-14 12:48:06,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36187 conditions, 5809 events. 3493/5809 cut-off events. For 333788/333792 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37918 event pairs, 821 based on Foata normal form. 6/5814 useless extension candidates. Maximal degree in co-relation 36072. Up to 4794 conditions per place. [2024-06-14 12:48:06,145 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 129 changer transitions 0/352 dead transitions. [2024-06-14 12:48:06,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 352 transitions, 4549 flow [2024-06-14 12:48:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:48:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:48:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:48:06,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 12:48:06,147 INFO L175 Difference]: Start difference. First operand has 238 places, 308 transitions, 3305 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:48:06,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 352 transitions, 4549 flow [2024-06-14 12:48:06,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 352 transitions, 4389 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:06,621 INFO L231 Difference]: Finished difference. Result has 242 places, 319 transitions, 3593 flow [2024-06-14 12:48:06,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3593, PETRI_PLACES=242, PETRI_TRANSITIONS=319} [2024-06-14 12:48:06,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 12:48:06,622 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 319 transitions, 3593 flow [2024-06-14 12:48:06,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:06,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:06,622 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, 1] [2024-06-14 12:48:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:48:06,622 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash 595700519, now seen corresponding path program 5 times [2024-06-14 12:48:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:06,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030246979] [2024-06-14 12:48:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:06,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030246979] [2024-06-14 12:48:09,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030246979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:09,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:09,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:09,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273493925] [2024-06-14 12:48:09,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:09,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:09,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:09,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:09,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:09,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 319 transitions, 3593 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:09,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:09,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:09,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:11,135 INFO L124 PetriNetUnfolderBase]: 3481/5792 cut-off events. [2024-06-14 12:48:11,135 INFO L125 PetriNetUnfolderBase]: For 330848/330856 co-relation queries the response was YES. [2024-06-14 12:48:11,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35948 conditions, 5792 events. 3481/5792 cut-off events. For 330848/330856 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37795 event pairs, 806 based on Foata normal form. 10/5801 useless extension candidates. Maximal degree in co-relation 35832. Up to 4819 conditions per place. [2024-06-14 12:48:11,190 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 221 selfloop transitions, 121 changer transitions 0/347 dead transitions. [2024-06-14 12:48:11,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 347 transitions, 4363 flow [2024-06-14 12:48:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:48:11,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:48:11,192 INFO L175 Difference]: Start difference. First operand has 242 places, 319 transitions, 3593 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:48:11,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 347 transitions, 4363 flow [2024-06-14 12:48:11,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 347 transitions, 4126 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 12:48:11,756 INFO L231 Difference]: Finished difference. Result has 245 places, 319 transitions, 3610 flow [2024-06-14 12:48:11,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3610, PETRI_PLACES=245, PETRI_TRANSITIONS=319} [2024-06-14 12:48:11,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 12:48:11,758 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 319 transitions, 3610 flow [2024-06-14 12:48:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:11,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:11,759 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, 1] [2024-06-14 12:48:11,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:48:11,759 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:11,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:11,759 INFO L85 PathProgramCache]: Analyzing trace with hash 367949099, now seen corresponding path program 6 times [2024-06-14 12:48:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:11,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986677601] [2024-06-14 12:48:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:11,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:14,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:14,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986677601] [2024-06-14 12:48:14,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986677601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:14,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:14,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:14,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654785756] [2024-06-14 12:48:14,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:14,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:14,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:14,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:14,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 319 transitions, 3610 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:14,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:14,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:14,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:16,466 INFO L124 PetriNetUnfolderBase]: 3475/5784 cut-off events. [2024-06-14 12:48:16,466 INFO L125 PetriNetUnfolderBase]: For 326388/326390 co-relation queries the response was YES. [2024-06-14 12:48:16,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36030 conditions, 5784 events. 3475/5784 cut-off events. For 326388/326390 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37764 event pairs, 827 based on Foata normal form. 2/5785 useless extension candidates. Maximal degree in co-relation 35912. Up to 4779 conditions per place. [2024-06-14 12:48:16,523 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 210 selfloop transitions, 128 changer transitions 0/343 dead transitions. [2024-06-14 12:48:16,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 343 transitions, 4356 flow [2024-06-14 12:48:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:48:16,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:48:16,525 INFO L175 Difference]: Start difference. First operand has 245 places, 319 transitions, 3610 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:48:16,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 343 transitions, 4356 flow [2024-06-14 12:48:17,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 343 transitions, 4075 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:17,029 INFO L231 Difference]: Finished difference. Result has 246 places, 319 transitions, 3591 flow [2024-06-14 12:48:17,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3329, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3591, PETRI_PLACES=246, PETRI_TRANSITIONS=319} [2024-06-14 12:48:17,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 12:48:17,030 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 319 transitions, 3591 flow [2024-06-14 12:48:17,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:17,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:17,030 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, 1] [2024-06-14 12:48:17,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:48:17,030 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:17,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 471947341, now seen corresponding path program 7 times [2024-06-14 12:48:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:17,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968290378] [2024-06-14 12:48:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:17,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968290378] [2024-06-14 12:48:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968290378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:19,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:19,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481962296] [2024-06-14 12:48:19,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:19,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:19,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:19,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 319 transitions, 3591 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:19,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:19,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:19,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:21,346 INFO L124 PetriNetUnfolderBase]: 3501/5830 cut-off events. [2024-06-14 12:48:21,346 INFO L125 PetriNetUnfolderBase]: For 341300/341308 co-relation queries the response was YES. [2024-06-14 12:48:21,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36475 conditions, 5830 events. 3501/5830 cut-off events. For 341300/341308 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38174 event pairs, 718 based on Foata normal form. 8/5837 useless extension candidates. Maximal degree in co-relation 36356. Up to 4720 conditions per place. [2024-06-14 12:48:21,412 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 237 selfloop transitions, 131 changer transitions 0/373 dead transitions. [2024-06-14 12:48:21,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 373 transitions, 5018 flow [2024-06-14 12:48:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:48:21,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:48:21,414 INFO L175 Difference]: Start difference. First operand has 246 places, 319 transitions, 3591 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:48:21,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 373 transitions, 5018 flow [2024-06-14 12:48:22,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 373 transitions, 4746 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:22,163 INFO L231 Difference]: Finished difference. Result has 249 places, 340 transitions, 3983 flow [2024-06-14 12:48:22,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3983, PETRI_PLACES=249, PETRI_TRANSITIONS=340} [2024-06-14 12:48:22,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 12:48:22,164 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 340 transitions, 3983 flow [2024-06-14 12:48:22,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:22,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:22,164 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, 1] [2024-06-14 12:48:22,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:48:22,164 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:22,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash 615600721, now seen corresponding path program 8 times [2024-06-14 12:48:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:22,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914686633] [2024-06-14 12:48:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:25,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:25,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914686633] [2024-06-14 12:48:25,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914686633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:25,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:25,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:25,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629666817] [2024-06-14 12:48:25,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:25,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:25,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:25,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:25,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:25,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:25,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 340 transitions, 3983 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:25,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:25,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:25,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:26,975 INFO L124 PetriNetUnfolderBase]: 3527/5881 cut-off events. [2024-06-14 12:48:26,975 INFO L125 PetriNetUnfolderBase]: For 359437/359439 co-relation queries the response was YES. [2024-06-14 12:48:27,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38025 conditions, 5881 events. 3527/5881 cut-off events. For 359437/359439 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38596 event pairs, 742 based on Foata normal form. 2/5882 useless extension candidates. Maximal degree in co-relation 37903. Up to 4735 conditions per place. [2024-06-14 12:48:27,047 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 236 selfloop transitions, 134 changer transitions 0/375 dead transitions. [2024-06-14 12:48:27,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 375 transitions, 5407 flow [2024-06-14 12:48:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:48:27,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:48:27,049 INFO L175 Difference]: Start difference. First operand has 249 places, 340 transitions, 3983 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:48:27,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 375 transitions, 5407 flow [2024-06-14 12:48:27,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 375 transitions, 5192 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 12:48:27,888 INFO L231 Difference]: Finished difference. Result has 252 places, 346 transitions, 4180 flow [2024-06-14 12:48:27,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4180, PETRI_PLACES=252, PETRI_TRANSITIONS=346} [2024-06-14 12:48:27,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:48:27,889 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 346 transitions, 4180 flow [2024-06-14 12:48:27,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:27,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:27,889 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, 1] [2024-06-14 12:48:27,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:48:27,889 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:27,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash 615837871, now seen corresponding path program 9 times [2024-06-14 12:48:27,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:27,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070972717] [2024-06-14 12:48:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:27,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:30,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070972717] [2024-06-14 12:48:30,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070972717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:30,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:30,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:30,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992425572] [2024-06-14 12:48:30,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:30,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:30,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:30,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:30,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 346 transitions, 4180 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:30,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:30,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:30,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:32,358 INFO L124 PetriNetUnfolderBase]: 3521/5861 cut-off events. [2024-06-14 12:48:32,358 INFO L125 PetriNetUnfolderBase]: For 360862/360864 co-relation queries the response was YES. [2024-06-14 12:48:32,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37970 conditions, 5861 events. 3521/5861 cut-off events. For 360862/360864 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 38309 event pairs, 732 based on Foata normal form. 2/5862 useless extension candidates. Maximal degree in co-relation 37848. Up to 4732 conditions per place. [2024-06-14 12:48:32,421 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 234 selfloop transitions, 135 changer transitions 0/374 dead transitions. [2024-06-14 12:48:32,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 374 transitions, 5316 flow [2024-06-14 12:48:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:48:32,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:48:32,427 INFO L175 Difference]: Start difference. First operand has 252 places, 346 transitions, 4180 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:48:32,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 374 transitions, 5316 flow [2024-06-14 12:48:33,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 374 transitions, 5037 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:33,133 INFO L231 Difference]: Finished difference. Result has 256 places, 346 transitions, 4177 flow [2024-06-14 12:48:33,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4177, PETRI_PLACES=256, PETRI_TRANSITIONS=346} [2024-06-14 12:48:33,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-14 12:48:33,134 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 346 transitions, 4177 flow [2024-06-14 12:48:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:33,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:33,134 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, 1] [2024-06-14 12:48:33,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:48:33,134 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:33,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash 549569583, now seen corresponding path program 10 times [2024-06-14 12:48:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:33,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082856895] [2024-06-14 12:48:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:33,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:35,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082856895] [2024-06-14 12:48:35,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082856895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:35,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:35,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:35,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311707175] [2024-06-14 12:48:35,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:35,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:35,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:35,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:35,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 346 transitions, 4177 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:35,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:35,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:35,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:37,973 INFO L124 PetriNetUnfolderBase]: 3525/5901 cut-off events. [2024-06-14 12:48:37,974 INFO L125 PetriNetUnfolderBase]: For 370256/370280 co-relation queries the response was YES. [2024-06-14 12:48:38,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37984 conditions, 5901 events. 3525/5901 cut-off events. For 370256/370280 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 38733 event pairs, 793 based on Foata normal form. 6/5906 useless extension candidates. Maximal degree in co-relation 37861. Up to 4733 conditions per place. [2024-06-14 12:48:38,034 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 244 selfloop transitions, 122 changer transitions 0/371 dead transitions. [2024-06-14 12:48:38,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 371 transitions, 5357 flow [2024-06-14 12:48:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:48:38,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:48:38,036 INFO L175 Difference]: Start difference. First operand has 256 places, 346 transitions, 4177 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:48:38,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 371 transitions, 5357 flow [2024-06-14 12:48:38,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 371 transitions, 5073 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:38,777 INFO L231 Difference]: Finished difference. Result has 258 places, 351 transitions, 4290 flow [2024-06-14 12:48:38,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4290, PETRI_PLACES=258, PETRI_TRANSITIONS=351} [2024-06-14 12:48:38,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 12:48:38,778 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 351 transitions, 4290 flow [2024-06-14 12:48:38,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:38,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:38,778 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, 1] [2024-06-14 12:48:38,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:48:38,778 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:38,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:38,779 INFO L85 PathProgramCache]: Analyzing trace with hash -73066323, now seen corresponding path program 11 times [2024-06-14 12:48:38,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:38,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534418845] [2024-06-14 12:48:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:41,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:41,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534418845] [2024-06-14 12:48:41,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534418845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:41,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:41,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:41,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924324883] [2024-06-14 12:48:41,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:41,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:41,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:41,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:41,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:41,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 351 transitions, 4290 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:41,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:41,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:41,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:43,288 INFO L124 PetriNetUnfolderBase]: 3535/5927 cut-off events. [2024-06-14 12:48:43,288 INFO L125 PetriNetUnfolderBase]: For 373092/373116 co-relation queries the response was YES. [2024-06-14 12:48:43,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38398 conditions, 5927 events. 3535/5927 cut-off events. For 373092/373116 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 39055 event pairs, 804 based on Foata normal form. 4/5930 useless extension candidates. Maximal degree in co-relation 38273. Up to 4739 conditions per place. [2024-06-14 12:48:43,466 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 131 changer transitions 0/374 dead transitions. [2024-06-14 12:48:43,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 374 transitions, 5458 flow [2024-06-14 12:48:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:48:43,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:48:43,469 INFO L175 Difference]: Start difference. First operand has 258 places, 351 transitions, 4290 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:48:43,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 374 transitions, 5458 flow [2024-06-14 12:48:44,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 5275 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 12:48:44,301 INFO L231 Difference]: Finished difference. Result has 263 places, 354 transitions, 4441 flow [2024-06-14 12:48:44,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4441, PETRI_PLACES=263, PETRI_TRANSITIONS=354} [2024-06-14 12:48:44,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-14 12:48:44,302 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 354 transitions, 4441 flow [2024-06-14 12:48:44,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:44,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:44,302 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, 1] [2024-06-14 12:48:44,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:48:44,303 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:44,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:44,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1641060945, now seen corresponding path program 12 times [2024-06-14 12:48:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:44,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619163726] [2024-06-14 12:48:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:44,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619163726] [2024-06-14 12:48:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619163726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:47,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:47,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329993349] [2024-06-14 12:48:47,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:47,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:47,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:47,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 354 transitions, 4441 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:47,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:47,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:47,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:49,086 INFO L124 PetriNetUnfolderBase]: 3529/5919 cut-off events. [2024-06-14 12:48:49,087 INFO L125 PetriNetUnfolderBase]: For 376629/376653 co-relation queries the response was YES. [2024-06-14 12:48:49,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38258 conditions, 5919 events. 3529/5919 cut-off events. For 376629/376653 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 38998 event pairs, 804 based on Foata normal form. 4/5922 useless extension candidates. Maximal degree in co-relation 38131. Up to 4736 conditions per place. [2024-06-14 12:48:49,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 239 selfloop transitions, 129 changer transitions 0/373 dead transitions. [2024-06-14 12:48:49,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 373 transitions, 5385 flow [2024-06-14 12:48:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:48:49,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:48:49,167 INFO L175 Difference]: Start difference. First operand has 263 places, 354 transitions, 4441 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:48:49,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 373 transitions, 5385 flow [2024-06-14 12:48:50,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 373 transitions, 5030 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:50,062 INFO L231 Difference]: Finished difference. Result has 265 places, 354 transitions, 4350 flow [2024-06-14 12:48:50,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4350, PETRI_PLACES=265, PETRI_TRANSITIONS=354} [2024-06-14 12:48:50,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-14 12:48:50,063 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 354 transitions, 4350 flow [2024-06-14 12:48:50,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:50,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:50,063 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, 1] [2024-06-14 12:48:50,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:48:50,063 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:50,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:50,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1464206007, now seen corresponding path program 2 times [2024-06-14 12:48:50,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:50,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724216454] [2024-06-14 12:48:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:50,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724216454] [2024-06-14 12:48:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724216454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:53,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:53,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:53,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615482504] [2024-06-14 12:48:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:53,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:53,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:53,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:53,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:53,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:53,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 354 transitions, 4350 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:53,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:53,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:53,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:55,547 INFO L124 PetriNetUnfolderBase]: 3648/6093 cut-off events. [2024-06-14 12:48:55,547 INFO L125 PetriNetUnfolderBase]: For 458256/458280 co-relation queries the response was YES. [2024-06-14 12:48:55,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40626 conditions, 6093 events. 3648/6093 cut-off events. For 458256/458280 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 40177 event pairs, 745 based on Foata normal form. 28/6120 useless extension candidates. Maximal degree in co-relation 40498. Up to 5089 conditions per place. [2024-06-14 12:48:55,606 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 315 selfloop transitions, 63 changer transitions 0/383 dead transitions. [2024-06-14 12:48:55,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 383 transitions, 5490 flow [2024-06-14 12:48:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:48:55,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:48:55,608 INFO L175 Difference]: Start difference. First operand has 265 places, 354 transitions, 4350 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:48:55,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 383 transitions, 5490 flow [2024-06-14 12:48:56,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 383 transitions, 5286 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:56,375 INFO L231 Difference]: Finished difference. Result has 267 places, 358 transitions, 4412 flow [2024-06-14 12:48:56,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4412, PETRI_PLACES=267, PETRI_TRANSITIONS=358} [2024-06-14 12:48:56,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 12:48:56,376 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 358 transitions, 4412 flow [2024-06-14 12:48:56,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:56,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:56,376 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, 1] [2024-06-14 12:48:56,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:48:56,377 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:56,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1907034807, now seen corresponding path program 3 times [2024-06-14 12:48:56,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:56,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992998349] [2024-06-14 12:48:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:56,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:59,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:59,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992998349] [2024-06-14 12:48:59,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992998349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:59,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:59,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:59,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909892042] [2024-06-14 12:48:59,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:59,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:59,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:59,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:59,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:59,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 358 transitions, 4412 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:59,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:59,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:59,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:01,786 INFO L124 PetriNetUnfolderBase]: 3682/6153 cut-off events. [2024-06-14 12:49:01,787 INFO L125 PetriNetUnfolderBase]: For 459980/460004 co-relation queries the response was YES. [2024-06-14 12:49:01,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41043 conditions, 6153 events. 3682/6153 cut-off events. For 459980/460004 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 40583 event pairs, 751 based on Foata normal form. 28/6180 useless extension candidates. Maximal degree in co-relation 40914. Up to 4617 conditions per place. [2024-06-14 12:49:01,852 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 73 changer transitions 0/389 dead transitions. [2024-06-14 12:49:01,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 389 transitions, 5718 flow [2024-06-14 12:49:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:49:01,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:49:01,854 INFO L175 Difference]: Start difference. First operand has 267 places, 358 transitions, 4412 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:49:01,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 389 transitions, 5718 flow [2024-06-14 12:49:02,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 389 transitions, 5586 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:49:02,852 INFO L231 Difference]: Finished difference. Result has 272 places, 361 transitions, 4532 flow [2024-06-14 12:49:02,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4280, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=272, PETRI_TRANSITIONS=361} [2024-06-14 12:49:02,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-14 12:49:02,853 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 361 transitions, 4532 flow [2024-06-14 12:49:02,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:02,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:02,854 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, 1] [2024-06-14 12:49:02,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:49:02,854 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:02,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -145934005, now seen corresponding path program 1 times [2024-06-14 12:49:02,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:02,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717938667] [2024-06-14 12:49:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:02,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:05,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:05,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717938667] [2024-06-14 12:49:05,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717938667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:05,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:05,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81221005] [2024-06-14 12:49:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:05,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:05,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 361 transitions, 4532 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:05,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:05,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:05,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:07,781 INFO L124 PetriNetUnfolderBase]: 3690/6164 cut-off events. [2024-06-14 12:49:07,782 INFO L125 PetriNetUnfolderBase]: For 436884/436886 co-relation queries the response was YES. [2024-06-14 12:49:07,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41395 conditions, 6164 events. 3690/6164 cut-off events. For 436884/436886 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 40745 event pairs, 847 based on Foata normal form. 2/6166 useless extension candidates. Maximal degree in co-relation 41263. Up to 5701 conditions per place. [2024-06-14 12:49:07,858 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 355 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-14 12:49:07,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 389 transitions, 5402 flow [2024-06-14 12:49:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:07,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:49:07,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:49:07,860 INFO L175 Difference]: Start difference. First operand has 272 places, 361 transitions, 4532 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:49:07,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 389 transitions, 5402 flow [2024-06-14 12:49:08,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 389 transitions, 5168 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:08,933 INFO L231 Difference]: Finished difference. Result has 274 places, 363 transitions, 4399 flow [2024-06-14 12:49:08,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4399, PETRI_PLACES=274, PETRI_TRANSITIONS=363} [2024-06-14 12:49:08,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 12:49:08,933 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 363 transitions, 4399 flow [2024-06-14 12:49:08,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:08,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:08,934 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, 1] [2024-06-14 12:49:08,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:49:08,934 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:08,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash 616054561, now seen corresponding path program 2 times [2024-06-14 12:49:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:08,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021046175] [2024-06-14 12:49:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:08,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021046175] [2024-06-14 12:49:11,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021046175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:11,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:11,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648925792] [2024-06-14 12:49:11,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:11,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:11,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:12,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:12,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 363 transitions, 4399 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:12,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:12,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:12,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:14,188 INFO L124 PetriNetUnfolderBase]: 3698/6176 cut-off events. [2024-06-14 12:49:14,188 INFO L125 PetriNetUnfolderBase]: For 447652/447654 co-relation queries the response was YES. [2024-06-14 12:49:14,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40707 conditions, 6176 events. 3698/6176 cut-off events. For 447652/447654 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 40879 event pairs, 849 based on Foata normal form. 2/6178 useless extension candidates. Maximal degree in co-relation 40575. Up to 5713 conditions per place. [2024-06-14 12:49:14,265 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 354 selfloop transitions, 28 changer transitions 0/387 dead transitions. [2024-06-14 12:49:14,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 387 transitions, 5257 flow [2024-06-14 12:49:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:49:14,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:49:14,266 INFO L175 Difference]: Start difference. First operand has 274 places, 363 transitions, 4399 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:49:14,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 387 transitions, 5257 flow [2024-06-14 12:49:15,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 387 transitions, 5172 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:15,351 INFO L231 Difference]: Finished difference. Result has 276 places, 365 transitions, 4417 flow [2024-06-14 12:49:15,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=276, PETRI_TRANSITIONS=365} [2024-06-14 12:49:15,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 12:49:15,352 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 365 transitions, 4417 flow [2024-06-14 12:49:15,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:15,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:15,352 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, 1] [2024-06-14 12:49:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:49:15,352 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:15,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash 616062001, now seen corresponding path program 3 times [2024-06-14 12:49:15,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:15,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226199564] [2024-06-14 12:49:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:18,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226199564] [2024-06-14 12:49:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226199564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:18,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:18,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112019321] [2024-06-14 12:49:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:18,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:18,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:18,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 365 transitions, 4417 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:18,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:18,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:18,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:20,182 INFO L124 PetriNetUnfolderBase]: 3706/6188 cut-off events. [2024-06-14 12:49:20,182 INFO L125 PetriNetUnfolderBase]: For 458772/458774 co-relation queries the response was YES. [2024-06-14 12:49:20,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41042 conditions, 6188 events. 3706/6188 cut-off events. For 458772/458774 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 40965 event pairs, 847 based on Foata normal form. 2/6190 useless extension candidates. Maximal degree in co-relation 40909. Up to 5705 conditions per place. [2024-06-14 12:49:20,250 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 351 selfloop transitions, 33 changer transitions 0/389 dead transitions. [2024-06-14 12:49:20,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 389 transitions, 5283 flow [2024-06-14 12:49:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:49:20,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:49:20,251 INFO L175 Difference]: Start difference. First operand has 276 places, 365 transitions, 4417 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:49:20,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 389 transitions, 5283 flow [2024-06-14 12:49:21,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 389 transitions, 5196 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:21,414 INFO L231 Difference]: Finished difference. Result has 278 places, 367 transitions, 4447 flow [2024-06-14 12:49:21,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4447, PETRI_PLACES=278, PETRI_TRANSITIONS=367} [2024-06-14 12:49:21,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 12:49:21,415 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 367 transitions, 4447 flow [2024-06-14 12:49:21,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:21,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:21,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:21,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:49:21,415 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:21,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash 983655453, now seen corresponding path program 4 times [2024-06-14 12:49:21,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:21,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486367456] [2024-06-14 12:49:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:21,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:24,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:24,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486367456] [2024-06-14 12:49:24,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486367456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:24,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:24,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:24,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242476506] [2024-06-14 12:49:24,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:24,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:24,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:24,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:24,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:24,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:24,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 367 transitions, 4447 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:24,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:24,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:24,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:26,726 INFO L124 PetriNetUnfolderBase]: 3714/6206 cut-off events. [2024-06-14 12:49:26,726 INFO L125 PetriNetUnfolderBase]: For 469827/469831 co-relation queries the response was YES. [2024-06-14 12:49:26,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41411 conditions, 6206 events. 3714/6206 cut-off events. For 469827/469831 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 41121 event pairs, 850 based on Foata normal form. 4/6210 useless extension candidates. Maximal degree in co-relation 41277. Up to 5737 conditions per place. [2024-06-14 12:49:26,803 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 353 selfloop transitions, 28 changer transitions 0/386 dead transitions. [2024-06-14 12:49:26,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 386 transitions, 5297 flow [2024-06-14 12:49:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:49:26,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:49:26,805 INFO L175 Difference]: Start difference. First operand has 278 places, 367 transitions, 4447 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:49:26,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 386 transitions, 5297 flow [2024-06-14 12:49:27,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 386 transitions, 5196 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:27,968 INFO L231 Difference]: Finished difference. Result has 280 places, 369 transitions, 4457 flow [2024-06-14 12:49:27,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4457, PETRI_PLACES=280, PETRI_TRANSITIONS=369} [2024-06-14 12:49:27,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 12:49:27,968 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 369 transitions, 4457 flow [2024-06-14 12:49:27,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:27,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:27,969 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, 1] [2024-06-14 12:49:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:49:27,969 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:27,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1898022735, now seen corresponding path program 5 times [2024-06-14 12:49:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:27,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582471146] [2024-06-14 12:49:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:27,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582471146] [2024-06-14 12:49:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582471146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:31,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53122650] [2024-06-14 12:49:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:31,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:31,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:31,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 369 transitions, 4457 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:31,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:31,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:31,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:32,864 INFO L124 PetriNetUnfolderBase]: 3722/6218 cut-off events. [2024-06-14 12:49:32,864 INFO L125 PetriNetUnfolderBase]: For 481172/481176 co-relation queries the response was YES. [2024-06-14 12:49:32,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41732 conditions, 6218 events. 3722/6218 cut-off events. For 481172/481176 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 41159 event pairs, 850 based on Foata normal form. 4/6222 useless extension candidates. Maximal degree in co-relation 41597. Up to 5735 conditions per place. [2024-06-14 12:49:32,936 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 352 selfloop transitions, 31 changer transitions 0/388 dead transitions. [2024-06-14 12:49:32,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 388 transitions, 5315 flow [2024-06-14 12:49:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:49:32,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:49:32,938 INFO L175 Difference]: Start difference. First operand has 280 places, 369 transitions, 4457 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:49:32,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 388 transitions, 5315 flow [2024-06-14 12:49:34,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 388 transitions, 5220 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:34,222 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4483 flow [2024-06-14 12:49:34,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4483, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-14 12:49:34,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 12:49:34,223 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4483 flow [2024-06-14 12:49:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:34,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:34,223 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, 1] [2024-06-14 12:49:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:49:34,223 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:34,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1648931535, now seen corresponding path program 6 times [2024-06-14 12:49:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:34,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018948817] [2024-06-14 12:49:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:37,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018948817] [2024-06-14 12:49:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018948817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:37,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388648794] [2024-06-14 12:49:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:37,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:37,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4483 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:37,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:37,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:37,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:39,114 INFO L124 PetriNetUnfolderBase]: 3717/6211 cut-off events. [2024-06-14 12:49:39,114 INFO L125 PetriNetUnfolderBase]: For 484989/484993 co-relation queries the response was YES. [2024-06-14 12:49:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41725 conditions, 6211 events. 3717/6211 cut-off events. For 484989/484993 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 41115 event pairs, 822 based on Foata normal form. 4/6215 useless extension candidates. Maximal degree in co-relation 41589. Up to 5680 conditions per place. [2024-06-14 12:49:39,195 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 343 selfloop transitions, 42 changer transitions 0/390 dead transitions. [2024-06-14 12:49:39,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 390 transitions, 5349 flow [2024-06-14 12:49:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:49:39,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:49:39,197 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4483 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:49:39,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 390 transitions, 5349 flow [2024-06-14 12:49:40,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 390 transitions, 5244 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:40,573 INFO L231 Difference]: Finished difference. Result has 284 places, 373 transitions, 4525 flow [2024-06-14 12:49:40,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4525, PETRI_PLACES=284, PETRI_TRANSITIONS=373} [2024-06-14 12:49:40,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-14 12:49:40,574 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 373 transitions, 4525 flow [2024-06-14 12:49:40,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:40,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:40,574 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, 1, 1] [2024-06-14 12:49:40,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:49:40,575 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:40,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1065168848, now seen corresponding path program 1 times [2024-06-14 12:49:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:40,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453170922] [2024-06-14 12:49:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:40,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:44,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:44,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453170922] [2024-06-14 12:49:44,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453170922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:44,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:44,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:44,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762131926] [2024-06-14 12:49:44,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:44,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:44,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:44,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:44,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:44,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 373 transitions, 4525 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:44,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:44,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:44,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:46,636 INFO L124 PetriNetUnfolderBase]: 3769/6282 cut-off events. [2024-06-14 12:49:46,636 INFO L125 PetriNetUnfolderBase]: For 519295/519301 co-relation queries the response was YES. [2024-06-14 12:49:46,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42728 conditions, 6282 events. 3769/6282 cut-off events. For 519295/519301 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 41570 event pairs, 829 based on Foata normal form. 8/6289 useless extension candidates. Maximal degree in co-relation 42591. Up to 4947 conditions per place. [2024-06-14 12:49:46,719 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 252 selfloop transitions, 175 changer transitions 0/432 dead transitions. [2024-06-14 12:49:46,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 432 transitions, 6043 flow [2024-06-14 12:49:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:49:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:49:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 227 transitions. [2024-06-14 12:49:46,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40608228980322003 [2024-06-14 12:49:46,721 INFO L175 Difference]: Start difference. First operand has 284 places, 373 transitions, 4525 flow. Second operand 13 states and 227 transitions. [2024-06-14 12:49:46,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 432 transitions, 6043 flow [2024-06-14 12:49:47,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 432 transitions, 5912 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:47,860 INFO L231 Difference]: Finished difference. Result has 291 places, 385 transitions, 4936 flow [2024-06-14 12:49:47,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4936, PETRI_PLACES=291, PETRI_TRANSITIONS=385} [2024-06-14 12:49:47,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:49:47,860 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 385 transitions, 4936 flow [2024-06-14 12:49:47,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:47,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:47,861 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, 1, 1] [2024-06-14 12:49:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:49:47,861 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:47,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:47,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1064840341, now seen corresponding path program 1 times [2024-06-14 12:49:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212110737] [2024-06-14 12:49:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:51,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:51,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212110737] [2024-06-14 12:49:51,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212110737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:51,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:51,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989403093] [2024-06-14 12:49:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:51,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:51,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 385 transitions, 4936 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:51,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:51,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:51,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:53,842 INFO L124 PetriNetUnfolderBase]: 3853/6412 cut-off events. [2024-06-14 12:49:53,843 INFO L125 PetriNetUnfolderBase]: For 565050/565056 co-relation queries the response was YES. [2024-06-14 12:49:53,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45081 conditions, 6412 events. 3853/6412 cut-off events. For 565050/565056 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 42545 event pairs, 851 based on Foata normal form. 8/6419 useless extension candidates. Maximal degree in co-relation 44943. Up to 4959 conditions per place. [2024-06-14 12:49:53,929 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 255 selfloop transitions, 178 changer transitions 0/438 dead transitions. [2024-06-14 12:49:53,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 438 transitions, 6522 flow [2024-06-14 12:49:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:49:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:49:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 211 transitions. [2024-06-14 12:49:53,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2024-06-14 12:49:53,931 INFO L175 Difference]: Start difference. First operand has 291 places, 385 transitions, 4936 flow. Second operand 12 states and 211 transitions. [2024-06-14 12:49:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 438 transitions, 6522 flow [2024-06-14 12:49:55,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 438 transitions, 6104 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-14 12:49:55,227 INFO L231 Difference]: Finished difference. Result has 294 places, 396 transitions, 5121 flow [2024-06-14 12:49:55,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4518, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5121, PETRI_PLACES=294, PETRI_TRANSITIONS=396} [2024-06-14 12:49:55,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 12:49:55,228 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 396 transitions, 5121 flow [2024-06-14 12:49:55,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:55,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:55,228 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, 1, 1] [2024-06-14 12:49:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:49:55,229 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:55,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1106544862, now seen corresponding path program 2 times [2024-06-14 12:49:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:55,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230186456] [2024-06-14 12:49:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:58,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230186456] [2024-06-14 12:49:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230186456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:58,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:58,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628591138] [2024-06-14 12:49:58,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:58,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:58,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:58,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:58,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:58,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 396 transitions, 5121 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:58,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:58,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:58,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:00,566 INFO L124 PetriNetUnfolderBase]: 3889/6478 cut-off events. [2024-06-14 12:50:00,567 INFO L125 PetriNetUnfolderBase]: For 590538/590544 co-relation queries the response was YES. [2024-06-14 12:50:00,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46362 conditions, 6478 events. 3889/6478 cut-off events. For 590538/590544 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 43078 event pairs, 848 based on Foata normal form. 10/6487 useless extension candidates. Maximal degree in co-relation 46222. Up to 5098 conditions per place. [2024-06-14 12:50:00,644 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 249 selfloop transitions, 194 changer transitions 0/448 dead transitions. [2024-06-14 12:50:00,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 448 transitions, 6643 flow [2024-06-14 12:50:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:50:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:50:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-14 12:50:00,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249471458773784 [2024-06-14 12:50:00,645 INFO L175 Difference]: Start difference. First operand has 294 places, 396 transitions, 5121 flow. Second operand 11 states and 201 transitions. [2024-06-14 12:50:00,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 448 transitions, 6643 flow [2024-06-14 12:50:02,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 448 transitions, 6362 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:02,101 INFO L231 Difference]: Finished difference. Result has 298 places, 405 transitions, 5394 flow [2024-06-14 12:50:02,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5394, PETRI_PLACES=298, PETRI_TRANSITIONS=405} [2024-06-14 12:50:02,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 12:50:02,102 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 405 transitions, 5394 flow [2024-06-14 12:50:02,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:02,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:02,103 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, 1, 1] [2024-06-14 12:50:02,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:50:02,103 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:02,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash 181408464, now seen corresponding path program 3 times [2024-06-14 12:50:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:02,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844110451] [2024-06-14 12:50:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:02,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844110451] [2024-06-14 12:50:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844110451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:05,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891937798] [2024-06-14 12:50:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:05,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:05,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:05,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 405 transitions, 5394 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:05,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:05,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:05,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:08,607 INFO L124 PetriNetUnfolderBase]: 3893/6472 cut-off events. [2024-06-14 12:50:08,607 INFO L125 PetriNetUnfolderBase]: For 592690/592696 co-relation queries the response was YES. [2024-06-14 12:50:08,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46759 conditions, 6472 events. 3893/6472 cut-off events. For 592690/592696 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42966 event pairs, 842 based on Foata normal form. 8/6479 useless extension candidates. Maximal degree in co-relation 46617. Up to 5103 conditions per place. [2024-06-14 12:50:08,685 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 267 selfloop transitions, 187 changer transitions 0/459 dead transitions. [2024-06-14 12:50:08,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 459 transitions, 6854 flow [2024-06-14 12:50:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 12:50:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 12:50:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 254 transitions. [2024-06-14 12:50:08,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3937984496124031 [2024-06-14 12:50:08,687 INFO L175 Difference]: Start difference. First operand has 298 places, 405 transitions, 5394 flow. Second operand 15 states and 254 transitions. [2024-06-14 12:50:08,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 459 transitions, 6854 flow [2024-06-14 12:50:09,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 459 transitions, 6469 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:09,906 INFO L231 Difference]: Finished difference. Result has 306 places, 408 transitions, 5441 flow [2024-06-14 12:50:09,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5441, PETRI_PLACES=306, PETRI_TRANSITIONS=408} [2024-06-14 12:50:09,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-14 12:50:09,907 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 408 transitions, 5441 flow [2024-06-14 12:50:09,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:09,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:09,907 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, 1, 1] [2024-06-14 12:50:09,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:50:09,907 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:09,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash 175867524, now seen corresponding path program 4 times [2024-06-14 12:50:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938720730] [2024-06-14 12:50:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:12,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:12,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938720730] [2024-06-14 12:50:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938720730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:12,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:50:12,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515144267] [2024-06-14 12:50:12,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:12,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:50:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:50:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:50:13,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:13,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 408 transitions, 5441 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:13,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:13,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:13,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:14,899 INFO L124 PetriNetUnfolderBase]: 3935/6554 cut-off events. [2024-06-14 12:50:14,899 INFO L125 PetriNetUnfolderBase]: For 614950/614956 co-relation queries the response was YES. [2024-06-14 12:50:15,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47602 conditions, 6554 events. 3935/6554 cut-off events. For 614950/614956 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 43654 event pairs, 848 based on Foata normal form. 8/6561 useless extension candidates. Maximal degree in co-relation 47459. Up to 5143 conditions per place. [2024-06-14 12:50:15,126 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 204 changer transitions 0/454 dead transitions. [2024-06-14 12:50:15,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 454 transitions, 6970 flow [2024-06-14 12:50:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:50:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:50:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 12:50:15,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 12:50:15,128 INFO L175 Difference]: Start difference. First operand has 306 places, 408 transitions, 5441 flow. Second operand 10 states and 186 transitions. [2024-06-14 12:50:15,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 454 transitions, 6970 flow [2024-06-14 12:50:16,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 454 transitions, 6558 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-14 12:50:16,499 INFO L231 Difference]: Finished difference. Result has 303 places, 417 transitions, 5604 flow [2024-06-14 12:50:16,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5047, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5604, PETRI_PLACES=303, PETRI_TRANSITIONS=417} [2024-06-14 12:50:16,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-14 12:50:16,500 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 417 transitions, 5604 flow [2024-06-14 12:50:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:16,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:16,501 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, 1, 1] [2024-06-14 12:50:16,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:50:16,501 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:16,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash 186057255, now seen corresponding path program 1 times [2024-06-14 12:50:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:16,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897413378] [2024-06-14 12:50:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:16,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:20,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:20,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897413378] [2024-06-14 12:50:20,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897413378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:20,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:20,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:20,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920052151] [2024-06-14 12:50:20,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:20,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:20,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:20,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:20,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 417 transitions, 5604 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:20,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:20,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:20,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:22,130 INFO L124 PetriNetUnfolderBase]: 3979/6604 cut-off events. [2024-06-14 12:50:22,131 INFO L125 PetriNetUnfolderBase]: For 671276/671282 co-relation queries the response was YES. [2024-06-14 12:50:22,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48273 conditions, 6604 events. 3979/6604 cut-off events. For 671276/671282 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43919 event pairs, 841 based on Foata normal form. 16/6620 useless extension candidates. Maximal degree in co-relation 48129. Up to 5867 conditions per place. [2024-06-14 12:50:22,248 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 53 changer transitions 0/455 dead transitions. [2024-06-14 12:50:22,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 455 transitions, 6689 flow [2024-06-14 12:50:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:50:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:50:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:50:22,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 12:50:22,250 INFO L175 Difference]: Start difference. First operand has 303 places, 417 transitions, 5604 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:50:22,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 455 transitions, 6689 flow [2024-06-14 12:50:23,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 455 transitions, 6353 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:23,709 INFO L231 Difference]: Finished difference. Result has 307 places, 419 transitions, 5433 flow [2024-06-14 12:50:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5433, PETRI_PLACES=307, PETRI_TRANSITIONS=419} [2024-06-14 12:50:23,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-14 12:50:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 419 transitions, 5433 flow [2024-06-14 12:50:23,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:23,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:23,710 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, 1, 1] [2024-06-14 12:50:23,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:50:23,710 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:23,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:23,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1060198711, now seen corresponding path program 2 times [2024-06-14 12:50:23,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:23,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889700776] [2024-06-14 12:50:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:23,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:27,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889700776] [2024-06-14 12:50:27,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889700776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:27,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:27,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:27,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705155935] [2024-06-14 12:50:27,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:27,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:27,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:27,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:27,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:27,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 419 transitions, 5433 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:27,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:27,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:27,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:29,287 INFO L124 PetriNetUnfolderBase]: 3999/6638 cut-off events. [2024-06-14 12:50:29,288 INFO L125 PetriNetUnfolderBase]: For 647088/647090 co-relation queries the response was YES. [2024-06-14 12:50:29,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48142 conditions, 6638 events. 3999/6638 cut-off events. For 647088/647090 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 44143 event pairs, 899 based on Foata normal form. 4/6641 useless extension candidates. Maximal degree in co-relation 47997. Up to 5099 conditions per place. [2024-06-14 12:50:29,376 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 195 changer transitions 0/459 dead transitions. [2024-06-14 12:50:29,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 459 transitions, 6911 flow [2024-06-14 12:50:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:50:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:50:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-14 12:50:29,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-14 12:50:29,378 INFO L175 Difference]: Start difference. First operand has 307 places, 419 transitions, 5433 flow. Second operand 11 states and 197 transitions. [2024-06-14 12:50:29,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 459 transitions, 6911 flow [2024-06-14 12:50:30,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 459 transitions, 6783 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:50:30,863 INFO L231 Difference]: Finished difference. Result has 310 places, 423 transitions, 5766 flow [2024-06-14 12:50:30,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5766, PETRI_PLACES=310, PETRI_TRANSITIONS=423} [2024-06-14 12:50:30,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 12:50:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 423 transitions, 5766 flow [2024-06-14 12:50:30,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:30,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:30,865 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, 1, 1] [2024-06-14 12:50:30,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:50:30,865 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:30,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1060198928, now seen corresponding path program 5 times [2024-06-14 12:50:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379564771] [2024-06-14 12:50:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:30,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:34,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:34,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379564771] [2024-06-14 12:50:34,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379564771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:34,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:34,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199741423] [2024-06-14 12:50:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:34,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:34,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 423 transitions, 5766 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:34,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:34,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:34,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:36,536 INFO L124 PetriNetUnfolderBase]: 4009/6642 cut-off events. [2024-06-14 12:50:36,536 INFO L125 PetriNetUnfolderBase]: For 655374/655376 co-relation queries the response was YES. [2024-06-14 12:50:36,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48787 conditions, 6642 events. 4009/6642 cut-off events. For 655374/655376 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 44108 event pairs, 881 based on Foata normal form. 2/6643 useless extension candidates. Maximal degree in co-relation 48641. Up to 5249 conditions per place. [2024-06-14 12:50:36,623 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 196 changer transitions 0/460 dead transitions. [2024-06-14 12:50:36,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 460 transitions, 7008 flow [2024-06-14 12:50:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:50:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:50:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-14 12:50:36,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41014799154334036 [2024-06-14 12:50:36,625 INFO L175 Difference]: Start difference. First operand has 310 places, 423 transitions, 5766 flow. Second operand 11 states and 194 transitions. [2024-06-14 12:50:36,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 460 transitions, 7008 flow [2024-06-14 12:50:38,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 460 transitions, 6588 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 12:50:38,160 INFO L231 Difference]: Finished difference. Result has 313 places, 426 transitions, 5796 flow [2024-06-14 12:50:38,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5796, PETRI_PLACES=313, PETRI_TRANSITIONS=426} [2024-06-14 12:50:38,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-14 12:50:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 426 transitions, 5796 flow [2024-06-14 12:50:38,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:38,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:38,161 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, 1, 1] [2024-06-14 12:50:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:50:38,161 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:38,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:38,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1060204508, now seen corresponding path program 6 times [2024-06-14 12:50:38,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:38,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677174556] [2024-06-14 12:50:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:38,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:41,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677174556] [2024-06-14 12:50:41,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677174556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:41,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:41,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:50:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126762180] [2024-06-14 12:50:41,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:41,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:50:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:50:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:50:41,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:41,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 426 transitions, 5796 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:41,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:41,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:41,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:43,212 INFO L124 PetriNetUnfolderBase]: 4003/6652 cut-off events. [2024-06-14 12:50:43,213 INFO L125 PetriNetUnfolderBase]: For 656550/656552 co-relation queries the response was YES. [2024-06-14 12:50:43,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48611 conditions, 6652 events. 4003/6652 cut-off events. For 656550/656552 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 44339 event pairs, 925 based on Foata normal form. 2/6653 useless extension candidates. Maximal degree in co-relation 48464. Up to 5244 conditions per place. [2024-06-14 12:50:43,305 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 255 selfloop transitions, 191 changer transitions 0/451 dead transitions. [2024-06-14 12:50:43,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 451 transitions, 7136 flow [2024-06-14 12:50:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:50:43,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:50:43,307 INFO L175 Difference]: Start difference. First operand has 313 places, 426 transitions, 5796 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:50:43,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 451 transitions, 7136 flow [2024-06-14 12:50:45,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 451 transitions, 6829 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:50:45,311 INFO L231 Difference]: Finished difference. Result has 313 places, 426 transitions, 5877 flow [2024-06-14 12:50:45,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5877, PETRI_PLACES=313, PETRI_TRANSITIONS=426} [2024-06-14 12:50:45,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-14 12:50:45,312 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 426 transitions, 5877 flow [2024-06-14 12:50:45,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:45,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:45,313 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, 1, 1] [2024-06-14 12:50:45,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:50:45,313 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:45,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1059371787, now seen corresponding path program 2 times [2024-06-14 12:50:45,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:45,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580578799] [2024-06-14 12:50:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:45,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580578799] [2024-06-14 12:50:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580578799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:48,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:48,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:48,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303158760] [2024-06-14 12:50:48,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:48,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:48,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:48,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 426 transitions, 5877 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:48,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:48,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:48,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:51,010 INFO L124 PetriNetUnfolderBase]: 4047/6733 cut-off events. [2024-06-14 12:50:51,010 INFO L125 PetriNetUnfolderBase]: For 717238/717252 co-relation queries the response was YES. [2024-06-14 12:50:51,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49341 conditions, 6733 events. 4047/6733 cut-off events. For 717238/717252 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 45120 event pairs, 874 based on Foata normal form. 24/6757 useless extension candidates. Maximal degree in co-relation 49193. Up to 5969 conditions per place. [2024-06-14 12:50:51,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 405 selfloop transitions, 46 changer transitions 0/456 dead transitions. [2024-06-14 12:50:51,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 456 transitions, 6944 flow [2024-06-14 12:50:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:50:51,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:50:51,108 INFO L175 Difference]: Start difference. First operand has 313 places, 426 transitions, 5877 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:50:51,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 456 transitions, 6944 flow [2024-06-14 12:50:53,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 456 transitions, 6556 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:53,219 INFO L231 Difference]: Finished difference. Result has 314 places, 428 transitions, 5644 flow [2024-06-14 12:50:53,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5644, PETRI_PLACES=314, PETRI_TRANSITIONS=428} [2024-06-14 12:50:53,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 12:50:53,219 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 428 transitions, 5644 flow [2024-06-14 12:50:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:53,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:53,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:53,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:50:53,220 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:53,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1989049817, now seen corresponding path program 3 times [2024-06-14 12:50:53,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:53,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304520868] [2024-06-14 12:50:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:56,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304520868] [2024-06-14 12:50:56,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304520868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:56,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:56,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:56,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851882688] [2024-06-14 12:50:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:56,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:56,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:56,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:56,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:50:56,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 428 transitions, 5644 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:56,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:56,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:50:56,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:58,775 INFO L124 PetriNetUnfolderBase]: 4032/6710 cut-off events. [2024-06-14 12:50:58,775 INFO L125 PetriNetUnfolderBase]: For 680095/680109 co-relation queries the response was YES. [2024-06-14 12:50:58,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47919 conditions, 6710 events. 4032/6710 cut-off events. For 680095/680109 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 44897 event pairs, 833 based on Foata normal form. 24/6734 useless extension candidates. Maximal degree in co-relation 47770. Up to 5552 conditions per place. [2024-06-14 12:50:58,855 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 406 selfloop transitions, 52 changer transitions 0/463 dead transitions. [2024-06-14 12:50:58,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 463 transitions, 6973 flow [2024-06-14 12:50:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:50:58,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:50:58,857 INFO L175 Difference]: Start difference. First operand has 314 places, 428 transitions, 5644 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:50:58,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 463 transitions, 6973 flow [2024-06-14 12:51:00,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 463 transitions, 6855 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:00,846 INFO L231 Difference]: Finished difference. Result has 316 places, 430 transitions, 5697 flow [2024-06-14 12:51:00,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5697, PETRI_PLACES=316, PETRI_TRANSITIONS=430} [2024-06-14 12:51:00,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 12:51:00,847 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 430 transitions, 5697 flow [2024-06-14 12:51:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:00,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:00,847 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, 1, 1] [2024-06-14 12:51:00,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:51:00,848 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:00,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1997627858, now seen corresponding path program 7 times [2024-06-14 12:51:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:00,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477560044] [2024-06-14 12:51:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:00,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:04,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477560044] [2024-06-14 12:51:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477560044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:04,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:04,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:04,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978651949] [2024-06-14 12:51:04,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:04,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:04,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:51:04,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 430 transitions, 5697 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:04,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:04,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:51:04,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:06,742 INFO L124 PetriNetUnfolderBase]: 4026/6689 cut-off events. [2024-06-14 12:51:06,742 INFO L125 PetriNetUnfolderBase]: For 638558/638560 co-relation queries the response was YES. [2024-06-14 12:51:06,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47805 conditions, 6689 events. 4026/6689 cut-off events. For 638558/638560 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44586 event pairs, 934 based on Foata normal form. 2/6690 useless extension candidates. Maximal degree in co-relation 47655. Up to 5286 conditions per place. [2024-06-14 12:51:06,831 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 269 selfloop transitions, 182 changer transitions 0/456 dead transitions. [2024-06-14 12:51:06,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 456 transitions, 6863 flow [2024-06-14 12:51:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:51:06,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:51:06,833 INFO L175 Difference]: Start difference. First operand has 316 places, 430 transitions, 5697 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:51:06,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 456 transitions, 6863 flow [2024-06-14 12:51:08,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 456 transitions, 6744 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:08,999 INFO L231 Difference]: Finished difference. Result has 320 places, 430 transitions, 5948 flow [2024-06-14 12:51:09,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5578, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5948, PETRI_PLACES=320, PETRI_TRANSITIONS=430} [2024-06-14 12:51:09,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-14 12:51:09,000 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 430 transitions, 5948 flow [2024-06-14 12:51:09,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:09,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:09,001 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, 1, 1] [2024-06-14 12:51:09,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:51:09,001 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:09,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1051090633, now seen corresponding path program 3 times [2024-06-14 12:51:09,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:09,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931565134] [2024-06-14 12:51:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:09,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:12,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931565134] [2024-06-14 12:51:12,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931565134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:12,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:12,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749787237] [2024-06-14 12:51:12,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:12,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:12,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:12,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:51:12,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 430 transitions, 5948 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:12,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:12,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:51:12,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:14,490 INFO L124 PetriNetUnfolderBase]: 4014/6687 cut-off events. [2024-06-14 12:51:14,491 INFO L125 PetriNetUnfolderBase]: For 641517/641519 co-relation queries the response was YES. [2024-06-14 12:51:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47680 conditions, 6687 events. 4014/6687 cut-off events. For 641517/641519 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44729 event pairs, 946 based on Foata normal form. 4/6690 useless extension candidates. Maximal degree in co-relation 47529. Up to 5138 conditions per place. [2024-06-14 12:51:14,585 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 181 changer transitions 0/457 dead transitions. [2024-06-14 12:51:14,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 457 transitions, 7156 flow [2024-06-14 12:51:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:51:14,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:51:14,586 INFO L175 Difference]: Start difference. First operand has 320 places, 430 transitions, 5948 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:51:14,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 457 transitions, 7156 flow [2024-06-14 12:51:16,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 457 transitions, 6659 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 12:51:16,930 INFO L231 Difference]: Finished difference. Result has 320 places, 430 transitions, 5820 flow [2024-06-14 12:51:16,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5451, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5820, PETRI_PLACES=320, PETRI_TRANSITIONS=430} [2024-06-14 12:51:16,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-14 12:51:16,931 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 430 transitions, 5820 flow [2024-06-14 12:51:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:16,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:16,931 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, 1, 1] [2024-06-14 12:51:16,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:51:16,931 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:16,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 456640546, now seen corresponding path program 8 times [2024-06-14 12:51:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:16,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82148497] [2024-06-14 12:51:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:19,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82148497] [2024-06-14 12:51:19,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82148497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:19,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:19,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:19,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78513865] [2024-06-14 12:51:19,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:19,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:19,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:19,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:51:19,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 430 transitions, 5820 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:19,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:19,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:51:19,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:22,562 INFO L124 PetriNetUnfolderBase]: 4066/6762 cut-off events. [2024-06-14 12:51:22,562 INFO L125 PetriNetUnfolderBase]: For 672260/672268 co-relation queries the response was YES. [2024-06-14 12:51:22,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48521 conditions, 6762 events. 4066/6762 cut-off events. For 672260/672268 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 45203 event pairs, 897 based on Foata normal form. 10/6771 useless extension candidates. Maximal degree in co-relation 48369. Up to 5640 conditions per place. [2024-06-14 12:51:22,646 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 342 selfloop transitions, 139 changer transitions 0/486 dead transitions. [2024-06-14 12:51:22,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 486 transitions, 7344 flow [2024-06-14 12:51:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:51:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:51:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 208 transitions. [2024-06-14 12:51:22,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:51:22,648 INFO L175 Difference]: Start difference. First operand has 320 places, 430 transitions, 5820 flow. Second operand 12 states and 208 transitions. [2024-06-14 12:51:22,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 486 transitions, 7344 flow [2024-06-14 12:51:24,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 486 transitions, 6926 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 12:51:24,486 INFO L231 Difference]: Finished difference. Result has 324 places, 442 transitions, 5954 flow [2024-06-14 12:51:24,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5954, PETRI_PLACES=324, PETRI_TRANSITIONS=442} [2024-06-14 12:51:24,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-14 12:51:24,492 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 442 transitions, 5954 flow [2024-06-14 12:51:24,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:24,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:24,492 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, 1, 1] [2024-06-14 12:51:24,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:51:24,492 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:24,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:24,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1286848536, now seen corresponding path program 9 times [2024-06-14 12:51:24,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:24,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110632674] [2024-06-14 12:51:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:27,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110632674] [2024-06-14 12:51:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110632674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:27,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:27,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:27,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011851898] [2024-06-14 12:51:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:27,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:27,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:51:27,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 442 transitions, 5954 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:27,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:27,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:51:27,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:30,172 INFO L124 PetriNetUnfolderBase]: 4054/6746 cut-off events. [2024-06-14 12:51:30,173 INFO L125 PetriNetUnfolderBase]: For 662163/662171 co-relation queries the response was YES. [2024-06-14 12:51:30,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48054 conditions, 6746 events. 4054/6746 cut-off events. For 662163/662171 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 45139 event pairs, 897 based on Foata normal form. 10/6755 useless extension candidates. Maximal degree in co-relation 47900. Up to 5630 conditions per place. [2024-06-14 12:51:30,251 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 339 selfloop transitions, 139 changer transitions 0/483 dead transitions. [2024-06-14 12:51:30,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 483 transitions, 7036 flow [2024-06-14 12:51:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:51:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:51:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-14 12:51:30,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41014799154334036 [2024-06-14 12:51:30,252 INFO L175 Difference]: Start difference. First operand has 324 places, 442 transitions, 5954 flow. Second operand 11 states and 194 transitions. [2024-06-14 12:51:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 483 transitions, 7036 flow [2024-06-14 12:51:32,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 483 transitions, 6706 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-14 12:51:32,108 INFO L231 Difference]: Finished difference. Result has 326 places, 442 transitions, 5912 flow [2024-06-14 12:51:32,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5624, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5912, PETRI_PLACES=326, PETRI_TRANSITIONS=442} [2024-06-14 12:51:32,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 12:51:32,109 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 442 transitions, 5912 flow [2024-06-14 12:51:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:32,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:32,109 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, 1, 1] [2024-06-14 12:51:32,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:51:32,109 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:32,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1361682571, now seen corresponding path program 4 times [2024-06-14 12:51:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:32,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294410107] [2024-06-14 12:51:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:32,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:35,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:35,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294410107] [2024-06-14 12:51:35,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294410107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:35,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:35,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:35,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718118383] [2024-06-14 12:51:35,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:35,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:35,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:35,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:35,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:51:35,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 442 transitions, 5912 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:35,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:35,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:51:35,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:37,988 INFO L124 PetriNetUnfolderBase]: 4064/6726 cut-off events. [2024-06-14 12:51:37,988 INFO L125 PetriNetUnfolderBase]: For 664590/664598 co-relation queries the response was YES. [2024-06-14 12:51:38,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48213 conditions, 6726 events. 4064/6726 cut-off events. For 664590/664598 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 44777 event pairs, 933 based on Foata normal form. 8/6733 useless extension candidates. Maximal degree in co-relation 48058. Up to 5672 conditions per place. [2024-06-14 12:51:38,067 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 340 selfloop transitions, 130 changer transitions 0/475 dead transitions. [2024-06-14 12:51:38,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 475 transitions, 7010 flow [2024-06-14 12:51:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:51:38,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:51:38,068 INFO L175 Difference]: Start difference. First operand has 326 places, 442 transitions, 5912 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:51:38,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 475 transitions, 7010 flow [2024-06-14 12:51:40,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 475 transitions, 6732 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 12:51:40,403 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 5974 flow [2024-06-14 12:51:40,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5974, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-14 12:51:40,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 12:51:40,404 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 5974 flow [2024-06-14 12:51:40,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:40,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:40,404 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, 1, 1] [2024-06-14 12:51:40,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:51:40,406 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:40,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1630443271, now seen corresponding path program 5 times [2024-06-14 12:51:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:40,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522017382] [2024-06-14 12:51:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:40,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:43,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522017382] [2024-06-14 12:51:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522017382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:43,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:43,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:43,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297171300] [2024-06-14 12:51:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:43,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:51:43,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 5974 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:43,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:43,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:51:43,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:45,654 INFO L124 PetriNetUnfolderBase]: 4074/6733 cut-off events. [2024-06-14 12:51:45,654 INFO L125 PetriNetUnfolderBase]: For 678997/679005 co-relation queries the response was YES. [2024-06-14 12:51:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48519 conditions, 6733 events. 4074/6733 cut-off events. For 678997/679005 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 44797 event pairs, 921 based on Foata normal form. 8/6740 useless extension candidates. Maximal degree in co-relation 48363. Up to 5660 conditions per place. [2024-06-14 12:51:45,749 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 335 selfloop transitions, 139 changer transitions 0/479 dead transitions. [2024-06-14 12:51:45,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 479 transitions, 7096 flow [2024-06-14 12:51:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:51:45,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:51:45,751 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 5974 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:51:45,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 479 transitions, 7096 flow [2024-06-14 12:51:48,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 479 transitions, 6782 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:48,301 INFO L231 Difference]: Finished difference. Result has 327 places, 448 transitions, 6030 flow [2024-06-14 12:51:48,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6030, PETRI_PLACES=327, PETRI_TRANSITIONS=448} [2024-06-14 12:51:48,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-14 12:51:48,302 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 448 transitions, 6030 flow [2024-06-14 12:51:48,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:48,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:48,302 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, 1, 1] [2024-06-14 12:51:48,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:51:48,302 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:48,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:48,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1670900623, now seen corresponding path program 6 times [2024-06-14 12:51:48,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:48,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704039219] [2024-06-14 12:51:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:48,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:51,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:51,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704039219] [2024-06-14 12:51:51,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704039219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:51,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:51,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536489608] [2024-06-14 12:51:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:51,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:51:51,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 448 transitions, 6030 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:51,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:51,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:51:51,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:54,008 INFO L124 PetriNetUnfolderBase]: 4132/6812 cut-off events. [2024-06-14 12:51:54,009 INFO L125 PetriNetUnfolderBase]: For 730037/730045 co-relation queries the response was YES. [2024-06-14 12:51:54,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50413 conditions, 6812 events. 4132/6812 cut-off events. For 730037/730045 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 45183 event pairs, 875 based on Foata normal form. 8/6819 useless extension candidates. Maximal degree in co-relation 50256. Up to 4924 conditions per place. [2024-06-14 12:51:54,103 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 225 selfloop transitions, 268 changer transitions 0/498 dead transitions. [2024-06-14 12:51:54,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 498 transitions, 8138 flow [2024-06-14 12:51:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:51:54,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:51:54,120 INFO L175 Difference]: Start difference. First operand has 327 places, 448 transitions, 6030 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:51:54,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 498 transitions, 8138 flow [2024-06-14 12:51:56,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 498 transitions, 7778 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:56,899 INFO L231 Difference]: Finished difference. Result has 329 places, 465 transitions, 6622 flow [2024-06-14 12:51:56,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5670, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6622, PETRI_PLACES=329, PETRI_TRANSITIONS=465} [2024-06-14 12:51:56,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 12:51:56,900 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 465 transitions, 6622 flow [2024-06-14 12:51:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:56,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:56,901 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, 1, 1] [2024-06-14 12:51:56,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:51:56,902 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:56,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2093232462, now seen corresponding path program 10 times [2024-06-14 12:51:56,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:56,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834001202] [2024-06-14 12:51:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:56,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:00,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834001202] [2024-06-14 12:52:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834001202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:00,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:00,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535564184] [2024-06-14 12:52:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:00,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:00,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:00,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 465 transitions, 6622 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:00,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:00,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:00,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:02,613 INFO L124 PetriNetUnfolderBase]: 4120/6827 cut-off events. [2024-06-14 12:52:02,613 INFO L125 PetriNetUnfolderBase]: For 735959/735963 co-relation queries the response was YES. [2024-06-14 12:52:02,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50987 conditions, 6827 events. 4120/6827 cut-off events. For 735959/735963 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 45692 event pairs, 938 based on Foata normal form. 6/6832 useless extension candidates. Maximal degree in co-relation 50830. Up to 5684 conditions per place. [2024-06-14 12:52:02,706 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 350 selfloop transitions, 149 changer transitions 0/504 dead transitions. [2024-06-14 12:52:02,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 504 transitions, 7944 flow [2024-06-14 12:52:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:52:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:52:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-14 12:52:02,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:52:02,708 INFO L175 Difference]: Start difference. First operand has 329 places, 465 transitions, 6622 flow. Second operand 12 states and 207 transitions. [2024-06-14 12:52:02,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 504 transitions, 7944 flow [2024-06-14 12:52:05,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 504 transitions, 7676 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-14 12:52:05,307 INFO L231 Difference]: Finished difference. Result has 338 places, 465 transitions, 6664 flow [2024-06-14 12:52:05,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6354, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6664, PETRI_PLACES=338, PETRI_TRANSITIONS=465} [2024-06-14 12:52:05,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-14 12:52:05,307 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 465 transitions, 6664 flow [2024-06-14 12:52:05,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:05,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:05,308 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, 1, 1] [2024-06-14 12:52:05,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:52:05,308 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:05,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1670633496, now seen corresponding path program 11 times [2024-06-14 12:52:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:05,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611945356] [2024-06-14 12:52:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:05,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:08,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611945356] [2024-06-14 12:52:08,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611945356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:08,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:08,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059504022] [2024-06-14 12:52:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:08,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:08,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:08,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:08,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 465 transitions, 6664 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:08,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:08,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:08,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:11,169 INFO L124 PetriNetUnfolderBase]: 4162/6918 cut-off events. [2024-06-14 12:52:11,169 INFO L125 PetriNetUnfolderBase]: For 754970/754978 co-relation queries the response was YES. [2024-06-14 12:52:11,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51532 conditions, 6918 events. 4162/6918 cut-off events. For 754970/754978 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 46410 event pairs, 795 based on Foata normal form. 8/6925 useless extension candidates. Maximal degree in co-relation 51372. Up to 5607 conditions per place. [2024-06-14 12:52:11,265 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 188 changer transitions 0/517 dead transitions. [2024-06-14 12:52:11,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 517 transitions, 8604 flow [2024-06-14 12:52:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:52:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:52:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-14 12:52:11,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080338266384778 [2024-06-14 12:52:11,267 INFO L175 Difference]: Start difference. First operand has 338 places, 465 transitions, 6664 flow. Second operand 11 states and 193 transitions. [2024-06-14 12:52:11,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 517 transitions, 8604 flow [2024-06-14 12:52:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 517 transitions, 7980 flow, removed 35 selfloop flow, removed 14 redundant places. [2024-06-14 12:52:13,943 INFO L231 Difference]: Finished difference. Result has 335 places, 474 transitions, 6574 flow [2024-06-14 12:52:13,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6066, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6574, PETRI_PLACES=335, PETRI_TRANSITIONS=474} [2024-06-14 12:52:13,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-14 12:52:13,944 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 474 transitions, 6574 flow [2024-06-14 12:52:13,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:13,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:13,944 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, 1, 1] [2024-06-14 12:52:13,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:52:13,944 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:13,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:13,945 INFO L85 PathProgramCache]: Analyzing trace with hash -224994700, now seen corresponding path program 12 times [2024-06-14 12:52:13,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:13,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172968521] [2024-06-14 12:52:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:13,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172968521] [2024-06-14 12:52:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172968521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:17,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:17,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:17,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870367654] [2024-06-14 12:52:17,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:17,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:17,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:17,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:17,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 474 transitions, 6574 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:17,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:17,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:17,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:20,151 INFO L124 PetriNetUnfolderBase]: 4150/6894 cut-off events. [2024-06-14 12:52:20,152 INFO L125 PetriNetUnfolderBase]: For 752829/752833 co-relation queries the response was YES. [2024-06-14 12:52:20,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50932 conditions, 6894 events. 4150/6894 cut-off events. For 752829/752833 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 46218 event pairs, 953 based on Foata normal form. 6/6899 useless extension candidates. Maximal degree in co-relation 50772. Up to 5725 conditions per place. [2024-06-14 12:52:20,255 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 360 selfloop transitions, 152 changer transitions 0/517 dead transitions. [2024-06-14 12:52:20,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 517 transitions, 7934 flow [2024-06-14 12:52:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 12:52:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 12:52:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2024-06-14 12:52:20,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38704318936877075 [2024-06-14 12:52:20,257 INFO L175 Difference]: Start difference. First operand has 335 places, 474 transitions, 6574 flow. Second operand 14 states and 233 transitions. [2024-06-14 12:52:20,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 517 transitions, 7934 flow [2024-06-14 12:52:22,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 517 transitions, 7510 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 12:52:22,602 INFO L231 Difference]: Finished difference. Result has 340 places, 474 transitions, 6464 flow [2024-06-14 12:52:22,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6464, PETRI_PLACES=340, PETRI_TRANSITIONS=474} [2024-06-14 12:52:22,603 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-14 12:52:22,603 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 474 transitions, 6464 flow [2024-06-14 12:52:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:22,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:22,603 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, 1, 1] [2024-06-14 12:52:22,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:52:22,604 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:22,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1670633713, now seen corresponding path program 7 times [2024-06-14 12:52:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:22,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535581764] [2024-06-14 12:52:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:25,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:25,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535581764] [2024-06-14 12:52:25,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535581764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:25,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:25,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:25,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109258132] [2024-06-14 12:52:25,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:25,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:25,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:25,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:25,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 474 transitions, 6464 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:25,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:25,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:25,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:28,387 INFO L124 PetriNetUnfolderBase]: 4144/6837 cut-off events. [2024-06-14 12:52:28,387 INFO L125 PetriNetUnfolderBase]: For 742897/742905 co-relation queries the response was YES. [2024-06-14 12:52:28,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50367 conditions, 6837 events. 4144/6837 cut-off events. For 742897/742905 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 45513 event pairs, 890 based on Foata normal form. 8/6844 useless extension candidates. Maximal degree in co-relation 50208. Up to 4929 conditions per place. [2024-06-14 12:52:28,481 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 230 selfloop transitions, 273 changer transitions 0/508 dead transitions. [2024-06-14 12:52:28,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 508 transitions, 8244 flow [2024-06-14 12:52:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:52:28,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:52:28,482 INFO L175 Difference]: Start difference. First operand has 340 places, 474 transitions, 6464 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:52:28,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 508 transitions, 8244 flow [2024-06-14 12:52:30,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 508 transitions, 7807 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-14 12:52:30,914 INFO L231 Difference]: Finished difference. Result has 336 places, 475 transitions, 6609 flow [2024-06-14 12:52:30,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6027, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6609, PETRI_PLACES=336, PETRI_TRANSITIONS=475} [2024-06-14 12:52:30,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 12:52:30,914 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 475 transitions, 6609 flow [2024-06-14 12:52:30,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:30,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:30,915 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, 1, 1] [2024-06-14 12:52:30,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:52:30,915 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:30,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1483119601, now seen corresponding path program 8 times [2024-06-14 12:52:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:30,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233654665] [2024-06-14 12:52:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:34,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:34,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233654665] [2024-06-14 12:52:34,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233654665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:34,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:34,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:34,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479454229] [2024-06-14 12:52:34,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:34,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:34,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:34,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:34,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:34,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 475 transitions, 6609 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:34,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:34,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:34,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:36,818 INFO L124 PetriNetUnfolderBase]: 4138/6843 cut-off events. [2024-06-14 12:52:36,819 INFO L125 PetriNetUnfolderBase]: For 742967/742971 co-relation queries the response was YES. [2024-06-14 12:52:36,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50652 conditions, 6843 events. 4138/6843 cut-off events. For 742967/742971 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 45712 event pairs, 947 based on Foata normal form. 4/6846 useless extension candidates. Maximal degree in co-relation 50492. Up to 5725 conditions per place. [2024-06-14 12:52:36,923 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 361 selfloop transitions, 144 changer transitions 0/510 dead transitions. [2024-06-14 12:52:36,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 510 transitions, 7975 flow [2024-06-14 12:52:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:52:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:52:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 12:52:36,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-14 12:52:36,925 INFO L175 Difference]: Start difference. First operand has 336 places, 475 transitions, 6609 flow. Second operand 11 states and 189 transitions. [2024-06-14 12:52:36,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 510 transitions, 7975 flow [2024-06-14 12:52:39,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 510 transitions, 7551 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 12:52:39,251 INFO L231 Difference]: Finished difference. Result has 343 places, 476 transitions, 6527 flow [2024-06-14 12:52:39,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6527, PETRI_PLACES=343, PETRI_TRANSITIONS=476} [2024-06-14 12:52:39,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 12:52:39,252 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 476 transitions, 6527 flow [2024-06-14 12:52:39,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:39,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:39,252 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, 1, 1] [2024-06-14 12:52:39,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:52:39,252 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:39,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1403637209, now seen corresponding path program 4 times [2024-06-14 12:52:39,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:39,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425489375] [2024-06-14 12:52:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:39,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:42,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:42,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425489375] [2024-06-14 12:52:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425489375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:42,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:42,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741859175] [2024-06-14 12:52:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:42,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:42,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:42,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:42,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:42,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 476 transitions, 6527 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:42,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:42,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:42,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:44,846 INFO L124 PetriNetUnfolderBase]: 4126/6863 cut-off events. [2024-06-14 12:52:44,847 INFO L125 PetriNetUnfolderBase]: For 742367/742373 co-relation queries the response was YES. [2024-06-14 12:52:44,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50055 conditions, 6863 events. 4126/6863 cut-off events. For 742367/742373 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 46113 event pairs, 915 based on Foata normal form. 6/6868 useless extension candidates. Maximal degree in co-relation 49892. Up to 6208 conditions per place. [2024-06-14 12:52:44,942 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 459 selfloop transitions, 37 changer transitions 0/501 dead transitions. [2024-06-14 12:52:44,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 501 transitions, 7595 flow [2024-06-14 12:52:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:52:44,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:52:44,944 INFO L175 Difference]: Start difference. First operand has 343 places, 476 transitions, 6527 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:52:44,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 501 transitions, 7595 flow [2024-06-14 12:52:47,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 501 transitions, 7209 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-14 12:52:47,589 INFO L231 Difference]: Finished difference. Result has 341 places, 476 transitions, 6220 flow [2024-06-14 12:52:47,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6220, PETRI_PLACES=341, PETRI_TRANSITIONS=476} [2024-06-14 12:52:47,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-14 12:52:47,592 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 476 transitions, 6220 flow [2024-06-14 12:52:47,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:47,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:47,592 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, 1, 1] [2024-06-14 12:52:47,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:52:47,593 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:47,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1478478188, now seen corresponding path program 13 times [2024-06-14 12:52:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:47,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851824460] [2024-06-14 12:52:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:47,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:51,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:51,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851824460] [2024-06-14 12:52:51,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851824460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:51,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:51,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352154979] [2024-06-14 12:52:51,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:51,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:51,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:51,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:51,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 476 transitions, 6220 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:51,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:51,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:51,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:53,429 INFO L124 PetriNetUnfolderBase]: 4120/6820 cut-off events. [2024-06-14 12:52:53,429 INFO L125 PetriNetUnfolderBase]: For 740076/740078 co-relation queries the response was YES. [2024-06-14 12:52:53,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49291 conditions, 6820 events. 4120/6820 cut-off events. For 740076/740078 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45540 event pairs, 957 based on Foata normal form. 2/6821 useless extension candidates. Maximal degree in co-relation 49127. Up to 5716 conditions per place. [2024-06-14 12:52:53,551 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 358 selfloop transitions, 139 changer transitions 0/502 dead transitions. [2024-06-14 12:52:53,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 502 transitions, 7288 flow [2024-06-14 12:52:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:52:53,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:52:53,552 INFO L175 Difference]: Start difference. First operand has 341 places, 476 transitions, 6220 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:52:53,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 502 transitions, 7288 flow [2024-06-14 12:52:56,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 502 transitions, 7140 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:52:56,357 INFO L231 Difference]: Finished difference. Result has 342 places, 476 transitions, 6356 flow [2024-06-14 12:52:56,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6072, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6356, PETRI_PLACES=342, PETRI_TRANSITIONS=476} [2024-06-14 12:52:56,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 12:52:56,358 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 476 transitions, 6356 flow [2024-06-14 12:52:56,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:56,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:56,358 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, 1, 1] [2024-06-14 12:52:56,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:52:56,359 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:56,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1429423887, now seen corresponding path program 9 times [2024-06-14 12:52:56,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:56,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593314915] [2024-06-14 12:52:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:59,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:59,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593314915] [2024-06-14 12:52:59,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593314915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:59,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:59,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:59,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215446369] [2024-06-14 12:52:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:59,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:59,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:59,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:52:59,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 476 transitions, 6356 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:59,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:59,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:52:59,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:01,669 INFO L124 PetriNetUnfolderBase]: 4114/6816 cut-off events. [2024-06-14 12:53:01,669 INFO L125 PetriNetUnfolderBase]: For 740781/740783 co-relation queries the response was YES. [2024-06-14 12:53:01,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49372 conditions, 6816 events. 4114/6816 cut-off events. For 740781/740783 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45589 event pairs, 960 based on Foata normal form. 2/6817 useless extension candidates. Maximal degree in co-relation 49207. Up to 5692 conditions per place. [2024-06-14 12:53:01,763 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 354 selfloop transitions, 143 changer transitions 0/502 dead transitions. [2024-06-14 12:53:01,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 502 transitions, 7424 flow [2024-06-14 12:53:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:53:01,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:53:01,765 INFO L175 Difference]: Start difference. First operand has 342 places, 476 transitions, 6356 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:53:01,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 502 transitions, 7424 flow [2024-06-14 12:53:04,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 502 transitions, 7104 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 12:53:04,647 INFO L231 Difference]: Finished difference. Result has 343 places, 476 transitions, 6328 flow [2024-06-14 12:53:04,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6036, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6328, PETRI_PLACES=343, PETRI_TRANSITIONS=476} [2024-06-14 12:53:04,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 12:53:04,648 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 476 transitions, 6328 flow [2024-06-14 12:53:04,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:04,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:04,648 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, 1, 1] [2024-06-14 12:53:04,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:53:04,649 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:04,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:04,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1829331761, now seen corresponding path program 5 times [2024-06-14 12:53:04,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:04,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111087433] [2024-06-14 12:53:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:08,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111087433] [2024-06-14 12:53:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111087433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:08,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:08,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:53:08,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149443416] [2024-06-14 12:53:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:08,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:53:08,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:53:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:53:08,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:53:08,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 476 transitions, 6328 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:08,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:08,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:53:08,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:10,172 INFO L124 PetriNetUnfolderBase]: 4122/6855 cut-off events. [2024-06-14 12:53:10,173 INFO L125 PetriNetUnfolderBase]: For 751492/751500 co-relation queries the response was YES. [2024-06-14 12:53:10,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49574 conditions, 6855 events. 4122/6855 cut-off events. For 751492/751500 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 46048 event pairs, 800 based on Foata normal form. 8/6862 useless extension candidates. Maximal degree in co-relation 49408. Up to 6032 conditions per place. [2024-06-14 12:53:10,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 425 selfloop transitions, 72 changer transitions 0/502 dead transitions. [2024-06-14 12:53:10,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 502 transitions, 7441 flow [2024-06-14 12:53:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:53:10,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:53:10,270 INFO L175 Difference]: Start difference. First operand has 343 places, 476 transitions, 6328 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:53:10,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 502 transitions, 7441 flow [2024-06-14 12:53:13,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 502 transitions, 7143 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:53:13,583 INFO L231 Difference]: Finished difference. Result has 343 places, 478 transitions, 6234 flow [2024-06-14 12:53:13,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6234, PETRI_PLACES=343, PETRI_TRANSITIONS=478} [2024-06-14 12:53:13,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 12:53:13,583 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 478 transitions, 6234 flow [2024-06-14 12:53:13,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:13,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:13,584 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, 1, 1] [2024-06-14 12:53:13,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:53:13,584 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:13,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash 878759168, now seen corresponding path program 14 times [2024-06-14 12:53:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940028343] [2024-06-14 12:53:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:16,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940028343] [2024-06-14 12:53:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940028343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:16,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:53:16,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000231866] [2024-06-14 12:53:16,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:16,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:53:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:53:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:53:16,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:53:16,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 478 transitions, 6234 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:16,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:16,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:53:16,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:19,062 INFO L124 PetriNetUnfolderBase]: 4116/6870 cut-off events. [2024-06-14 12:53:19,062 INFO L125 PetriNetUnfolderBase]: For 749728/749752 co-relation queries the response was YES. [2024-06-14 12:53:19,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49192 conditions, 6870 events. 4116/6870 cut-off events. For 749728/749752 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 46245 event pairs, 883 based on Foata normal form. 4/6873 useless extension candidates. Maximal degree in co-relation 49025. Up to 5552 conditions per place. [2024-06-14 12:53:19,156 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 322 selfloop transitions, 170 changer transitions 0/497 dead transitions. [2024-06-14 12:53:19,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 497 transitions, 7498 flow [2024-06-14 12:53:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:53:19,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:53:19,157 INFO L175 Difference]: Start difference. First operand has 343 places, 478 transitions, 6234 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:53:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 497 transitions, 7498 flow [2024-06-14 12:53:21,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 497 transitions, 7315 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:21,987 INFO L231 Difference]: Finished difference. Result has 345 places, 478 transitions, 6397 flow [2024-06-14 12:53:21,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6397, PETRI_PLACES=345, PETRI_TRANSITIONS=478} [2024-06-14 12:53:21,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-14 12:53:21,987 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 478 transitions, 6397 flow [2024-06-14 12:53:21,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:21,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:21,988 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, 1, 1] [2024-06-14 12:53:21,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:53:21,988 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:21,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -70734293, now seen corresponding path program 6 times [2024-06-14 12:53:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:21,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732282988] [2024-06-14 12:53:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:21,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:25,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732282988] [2024-06-14 12:53:25,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732282988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:25,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:25,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:53:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259105307] [2024-06-14 12:53:25,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:25,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:53:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:53:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:53:25,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:53:25,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 478 transitions, 6397 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:25,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:25,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:53:25,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:27,332 INFO L124 PetriNetUnfolderBase]: 4124/6851 cut-off events. [2024-06-14 12:53:27,333 INFO L125 PetriNetUnfolderBase]: For 762768/762776 co-relation queries the response was YES. [2024-06-14 12:53:27,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49651 conditions, 6851 events. 4124/6851 cut-off events. For 762768/762776 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 45965 event pairs, 796 based on Foata normal form. 8/6858 useless extension candidates. Maximal degree in co-relation 49483. Up to 5968 conditions per place. [2024-06-14 12:53:27,430 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 424 selfloop transitions, 79 changer transitions 0/508 dead transitions. [2024-06-14 12:53:27,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 508 transitions, 7568 flow [2024-06-14 12:53:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:53:27,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:53:27,431 INFO L175 Difference]: Start difference. First operand has 345 places, 478 transitions, 6397 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:53:27,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 508 transitions, 7568 flow [2024-06-14 12:53:30,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 508 transitions, 7208 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:30,205 INFO L231 Difference]: Finished difference. Result has 347 places, 480 transitions, 6253 flow [2024-06-14 12:53:30,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6037, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6253, PETRI_PLACES=347, PETRI_TRANSITIONS=480} [2024-06-14 12:53:30,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 12:53:30,205 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 480 transitions, 6253 flow [2024-06-14 12:53:30,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:30,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:30,206 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, 1, 1] [2024-06-14 12:53:30,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:53:30,206 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:30,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2060506987, now seen corresponding path program 10 times [2024-06-14 12:53:30,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:30,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431281622] [2024-06-14 12:53:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:30,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:33,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:33,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431281622] [2024-06-14 12:53:33,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431281622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:33,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:33,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:33,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996972806] [2024-06-14 12:53:33,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:33,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:33,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:53:33,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 480 transitions, 6253 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:33,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:33,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:53:33,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:35,986 INFO L124 PetriNetUnfolderBase]: 4150/6845 cut-off events. [2024-06-14 12:53:35,987 INFO L125 PetriNetUnfolderBase]: For 791130/791132 co-relation queries the response was YES. [2024-06-14 12:53:36,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50102 conditions, 6845 events. 4150/6845 cut-off events. For 791130/791132 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 45544 event pairs, 915 based on Foata normal form. 2/6846 useless extension candidates. Maximal degree in co-relation 49933. Up to 4936 conditions per place. [2024-06-14 12:53:36,083 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 229 selfloop transitions, 280 changer transitions 0/514 dead transitions. [2024-06-14 12:53:36,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 514 transitions, 8211 flow [2024-06-14 12:53:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:53:36,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:53:36,085 INFO L175 Difference]: Start difference. First operand has 347 places, 480 transitions, 6253 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:53:36,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 514 transitions, 8211 flow [2024-06-14 12:53:39,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 514 transitions, 8018 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:39,121 INFO L231 Difference]: Finished difference. Result has 350 places, 486 transitions, 6792 flow [2024-06-14 12:53:39,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6060, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6792, PETRI_PLACES=350, PETRI_TRANSITIONS=486} [2024-06-14 12:53:39,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-14 12:53:39,121 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 486 transitions, 6792 flow [2024-06-14 12:53:39,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:39,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:39,122 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, 1, 1] [2024-06-14 12:53:39,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:53:39,122 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:39,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash 878941448, now seen corresponding path program 15 times [2024-06-14 12:53:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:39,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608067075] [2024-06-14 12:53:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:39,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:42,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:42,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608067075] [2024-06-14 12:53:42,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608067075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:42,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:42,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946205219] [2024-06-14 12:53:42,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:42,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:42,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:53:42,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 486 transitions, 6792 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:42,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:42,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:53:42,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:45,033 INFO L124 PetriNetUnfolderBase]: 4160/6900 cut-off events. [2024-06-14 12:53:45,033 INFO L125 PetriNetUnfolderBase]: For 806770/806772 co-relation queries the response was YES. [2024-06-14 12:53:45,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51044 conditions, 6900 events. 4160/6900 cut-off events. For 806770/806772 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46301 event pairs, 852 based on Foata normal form. 2/6901 useless extension candidates. Maximal degree in co-relation 50874. Up to 5610 conditions per place. [2024-06-14 12:53:45,122 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 329 selfloop transitions, 182 changer transitions 0/516 dead transitions. [2024-06-14 12:53:45,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 516 transitions, 8163 flow [2024-06-14 12:53:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:53:45,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:53:45,124 INFO L175 Difference]: Start difference. First operand has 350 places, 486 transitions, 6792 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:53:45,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 516 transitions, 8163 flow [2024-06-14 12:53:48,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 516 transitions, 7629 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-14 12:53:48,084 INFO L231 Difference]: Finished difference. Result has 354 places, 489 transitions, 6667 flow [2024-06-14 12:53:48,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6667, PETRI_PLACES=354, PETRI_TRANSITIONS=489} [2024-06-14 12:53:48,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 12:53:48,085 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 489 transitions, 6667 flow [2024-06-14 12:53:48,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:48,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:48,085 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, 1, 1] [2024-06-14 12:53:48,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:53:48,086 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:48,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1903755015, now seen corresponding path program 11 times [2024-06-14 12:53:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059339404] [2024-06-14 12:53:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:51,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059339404] [2024-06-14 12:53:51,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059339404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:51,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:51,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:51,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795940687] [2024-06-14 12:53:51,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:51,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:51,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:51,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:53:51,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 489 transitions, 6667 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:51,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:51,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:53:51,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:54,246 INFO L124 PetriNetUnfolderBase]: 4170/6862 cut-off events. [2024-06-14 12:53:54,246 INFO L125 PetriNetUnfolderBase]: For 819749/819751 co-relation queries the response was YES. [2024-06-14 12:53:54,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50771 conditions, 6862 events. 4170/6862 cut-off events. For 819749/819751 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45571 event pairs, 915 based on Foata normal form. 2/6863 useless extension candidates. Maximal degree in co-relation 50600. Up to 4948 conditions per place. [2024-06-14 12:53:54,348 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 232 selfloop transitions, 283 changer transitions 0/520 dead transitions. [2024-06-14 12:53:54,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 520 transitions, 8553 flow [2024-06-14 12:53:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:53:54,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:53:54,349 INFO L175 Difference]: Start difference. First operand has 354 places, 489 transitions, 6667 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:53:54,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 520 transitions, 8553 flow [2024-06-14 12:53:57,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 520 transitions, 8289 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:57,785 INFO L231 Difference]: Finished difference. Result has 357 places, 492 transitions, 7045 flow [2024-06-14 12:53:57,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6403, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7045, PETRI_PLACES=357, PETRI_TRANSITIONS=492} [2024-06-14 12:53:57,785 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-14 12:53:57,786 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 492 transitions, 7045 flow [2024-06-14 12:53:57,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:57,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:57,786 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, 1, 1] [2024-06-14 12:53:57,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:53:57,786 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:57,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1029383004, now seen corresponding path program 16 times [2024-06-14 12:53:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:57,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850728590] [2024-06-14 12:53:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:00,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:00,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850728590] [2024-06-14 12:54:00,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850728590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:00,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:00,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:00,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068812981] [2024-06-14 12:54:00,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:00,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:00,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:00,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:54:00,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 492 transitions, 7045 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:00,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:00,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:54:00,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:03,467 INFO L124 PetriNetUnfolderBase]: 4180/6933 cut-off events. [2024-06-14 12:54:03,467 INFO L125 PetriNetUnfolderBase]: For 836421/836423 co-relation queries the response was YES. [2024-06-14 12:54:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51525 conditions, 6933 events. 4180/6933 cut-off events. For 836421/836423 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 46544 event pairs, 840 based on Foata normal form. 2/6934 useless extension candidates. Maximal degree in co-relation 51352. Up to 5634 conditions per place. [2024-06-14 12:54:03,560 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 333 selfloop transitions, 186 changer transitions 0/524 dead transitions. [2024-06-14 12:54:03,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 524 transitions, 8443 flow [2024-06-14 12:54:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:54:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:54:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 12:54:03,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:54:03,562 INFO L175 Difference]: Start difference. First operand has 357 places, 492 transitions, 7045 flow. Second operand 10 states and 170 transitions. [2024-06-14 12:54:03,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 524 transitions, 8443 flow [2024-06-14 12:54:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 524 transitions, 7675 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 12:54:06,798 INFO L231 Difference]: Finished difference. Result has 359 places, 495 transitions, 6697 flow [2024-06-14 12:54:06,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6697, PETRI_PLACES=359, PETRI_TRANSITIONS=495} [2024-06-14 12:54:06,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 12:54:06,798 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 495 transitions, 6697 flow [2024-06-14 12:54:06,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:06,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:06,799 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, 1, 1] [2024-06-14 12:54:06,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:54:06,799 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:06,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1836272847, now seen corresponding path program 12 times [2024-06-14 12:54:06,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:06,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096289841] [2024-06-14 12:54:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:06,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:09,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096289841] [2024-06-14 12:54:09,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096289841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:09,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:09,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:09,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422661866] [2024-06-14 12:54:09,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:09,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:09,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:09,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:10,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:54:10,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 495 transitions, 6697 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:10,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:10,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:54:10,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:12,550 INFO L124 PetriNetUnfolderBase]: 4174/6876 cut-off events. [2024-06-14 12:54:12,550 INFO L125 PetriNetUnfolderBase]: For 829343/829345 co-relation queries the response was YES. [2024-06-14 12:54:12,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50558 conditions, 6876 events. 4174/6876 cut-off events. For 829343/829345 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 45790 event pairs, 913 based on Foata normal form. 2/6877 useless extension candidates. Maximal degree in co-relation 50386. Up to 4951 conditions per place. [2024-06-14 12:54:12,651 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 284 changer transitions 0/522 dead transitions. [2024-06-14 12:54:12,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 522 transitions, 8285 flow [2024-06-14 12:54:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:54:12,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:54:12,653 INFO L175 Difference]: Start difference. First operand has 359 places, 495 transitions, 6697 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:54:12,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 522 transitions, 8285 flow [2024-06-14 12:54:16,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 522 transitions, 7855 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 12:54:16,143 INFO L231 Difference]: Finished difference. Result has 360 places, 495 transitions, 6841 flow [2024-06-14 12:54:16,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6841, PETRI_PLACES=360, PETRI_TRANSITIONS=495} [2024-06-14 12:54:16,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-14 12:54:16,144 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 495 transitions, 6841 flow [2024-06-14 12:54:16,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:16,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:16,144 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, 1, 1] [2024-06-14 12:54:16,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:54:16,144 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:16,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash -134929109, now seen corresponding path program 7 times [2024-06-14 12:54:16,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:16,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11688221] [2024-06-14 12:54:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:19,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:19,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11688221] [2024-06-14 12:54:19,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11688221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:19,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:19,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274110253] [2024-06-14 12:54:19,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:19,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:54:19,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 495 transitions, 6841 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:19,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:19,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:54:19,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:21,586 INFO L124 PetriNetUnfolderBase]: 4218/7027 cut-off events. [2024-06-14 12:54:21,586 INFO L125 PetriNetUnfolderBase]: For 913293/913317 co-relation queries the response was YES. [2024-06-14 12:54:21,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51594 conditions, 7027 events. 4218/7027 cut-off events. For 913293/913317 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 47386 event pairs, 839 based on Foata normal form. 28/7054 useless extension candidates. Maximal degree in co-relation 51421. Up to 6132 conditions per place. [2024-06-14 12:54:21,684 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 452 selfloop transitions, 62 changer transitions 0/519 dead transitions. [2024-06-14 12:54:21,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 519 transitions, 8020 flow [2024-06-14 12:54:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:54:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:54:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:54:21,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:54:21,686 INFO L175 Difference]: Start difference. First operand has 360 places, 495 transitions, 6841 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:54:21,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 519 transitions, 8020 flow [2024-06-14 12:54:24,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 519 transitions, 7661 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:54:24,582 INFO L231 Difference]: Finished difference. Result has 361 places, 497 transitions, 6671 flow [2024-06-14 12:54:24,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6482, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6671, PETRI_PLACES=361, PETRI_TRANSITIONS=497} [2024-06-14 12:54:24,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-14 12:54:24,583 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 497 transitions, 6671 flow [2024-06-14 12:54:24,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:24,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:24,583 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, 1, 1] [2024-06-14 12:54:24,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:54:24,583 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:24,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1222908301, now seen corresponding path program 8 times [2024-06-14 12:54:24,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:24,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841949527] [2024-06-14 12:54:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:24,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:28,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:28,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841949527] [2024-06-14 12:54:28,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841949527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:28,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:28,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:28,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938424918] [2024-06-14 12:54:28,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:28,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:28,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:54:28,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 497 transitions, 6671 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:28,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:54:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:30,211 INFO L124 PetriNetUnfolderBase]: 4203/7006 cut-off events. [2024-06-14 12:54:30,212 INFO L125 PetriNetUnfolderBase]: For 853002/853026 co-relation queries the response was YES. [2024-06-14 12:54:30,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49809 conditions, 7006 events. 4203/7006 cut-off events. For 853002/853026 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 47290 event pairs, 810 based on Foata normal form. 28/7033 useless extension candidates. Maximal degree in co-relation 49634. Up to 5861 conditions per place. [2024-06-14 12:54:30,311 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 454 selfloop transitions, 67 changer transitions 0/526 dead transitions. [2024-06-14 12:54:30,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 526 transitions, 8164 flow [2024-06-14 12:54:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:54:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:54:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:54:30,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:54:30,313 INFO L175 Difference]: Start difference. First operand has 361 places, 497 transitions, 6671 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:54:30,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 526 transitions, 8164 flow [2024-06-14 12:54:33,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 526 transitions, 8014 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:54:33,362 INFO L231 Difference]: Finished difference. Result has 363 places, 499 transitions, 6723 flow [2024-06-14 12:54:33,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6723, PETRI_PLACES=363, PETRI_TRANSITIONS=499} [2024-06-14 12:54:33,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 12:54:33,363 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 499 transitions, 6723 flow [2024-06-14 12:54:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:33,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:33,363 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, 1, 1] [2024-06-14 12:54:33,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:54:33,363 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:33,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash 826451440, now seen corresponding path program 17 times [2024-06-14 12:54:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:33,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705044858] [2024-06-14 12:54:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:33,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:36,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:36,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705044858] [2024-06-14 12:54:36,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705044858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:36,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:36,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049421368] [2024-06-14 12:54:36,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:36,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:36,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:54:36,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 499 transitions, 6723 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:36,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:36,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:54:36,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:39,372 INFO L124 PetriNetUnfolderBase]: 4213/7033 cut-off events. [2024-06-14 12:54:39,372 INFO L125 PetriNetUnfolderBase]: For 793088/793112 co-relation queries the response was YES. [2024-06-14 12:54:39,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49937 conditions, 7033 events. 4213/7033 cut-off events. For 793088/793112 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 47550 event pairs, 896 based on Foata normal form. 4/7036 useless extension candidates. Maximal degree in co-relation 49761. Up to 5683 conditions per place. [2024-06-14 12:54:39,490 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 346 selfloop transitions, 172 changer transitions 0/523 dead transitions. [2024-06-14 12:54:39,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 523 transitions, 8099 flow [2024-06-14 12:54:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:54:39,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:54:39,491 INFO L175 Difference]: Start difference. First operand has 363 places, 499 transitions, 6723 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:54:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 523 transitions, 8099 flow [2024-06-14 12:54:43,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 523 transitions, 7952 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:54:43,117 INFO L231 Difference]: Finished difference. Result has 367 places, 502 transitions, 6964 flow [2024-06-14 12:54:43,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6964, PETRI_PLACES=367, PETRI_TRANSITIONS=502} [2024-06-14 12:54:43,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-14 12:54:43,118 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 502 transitions, 6964 flow [2024-06-14 12:54:43,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:43,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:43,118 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, 1, 1] [2024-06-14 12:54:43,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:54:43,119 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:43,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash 826451657, now seen corresponding path program 13 times [2024-06-14 12:54:43,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:43,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511052723] [2024-06-14 12:54:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:43,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:47,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511052723] [2024-06-14 12:54:47,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511052723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:47,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:47,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:47,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737438309] [2024-06-14 12:54:47,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:47,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:47,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:47,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:47,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:54:47,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 502 transitions, 6964 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:47,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:47,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:54:47,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:49,367 INFO L124 PetriNetUnfolderBase]: 4217/7057 cut-off events. [2024-06-14 12:54:49,368 INFO L125 PetriNetUnfolderBase]: For 807667/807689 co-relation queries the response was YES. [2024-06-14 12:54:49,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50072 conditions, 7057 events. 4217/7057 cut-off events. For 807667/807689 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 47870 event pairs, 1003 based on Foata normal form. 4/7059 useless extension candidates. Maximal degree in co-relation 49895. Up to 5005 conditions per place. [2024-06-14 12:54:49,473 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 257 selfloop transitions, 264 changer transitions 0/526 dead transitions. [2024-06-14 12:54:49,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 526 transitions, 8643 flow [2024-06-14 12:54:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:54:49,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:54:49,474 INFO L175 Difference]: Start difference. First operand has 367 places, 502 transitions, 6964 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:54:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 526 transitions, 8643 flow [2024-06-14 12:54:52,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 526 transitions, 8334 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:54:52,945 INFO L231 Difference]: Finished difference. Result has 370 places, 505 transitions, 7279 flow [2024-06-14 12:54:52,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7279, PETRI_PLACES=370, PETRI_TRANSITIONS=505} [2024-06-14 12:54:52,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 12:54:52,946 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 505 transitions, 7279 flow [2024-06-14 12:54:52,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:52,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:52,946 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, 1, 1] [2024-06-14 12:54:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:54:52,948 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:52,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2022972045, now seen corresponding path program 9 times [2024-06-14 12:54:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:52,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575872861] [2024-06-14 12:54:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:52,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575872861] [2024-06-14 12:54:56,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575872861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:56,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:56,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:56,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718158188] [2024-06-14 12:54:56,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:56,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:56,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:56,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:56,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:56,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:54:56,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 505 transitions, 7279 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:56,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:56,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:54:56,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:58,672 INFO L124 PetriNetUnfolderBase]: 4205/7012 cut-off events. [2024-06-14 12:54:58,672 INFO L125 PetriNetUnfolderBase]: For 789284/789308 co-relation queries the response was YES. [2024-06-14 12:54:58,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50089 conditions, 7012 events. 4205/7012 cut-off events. For 789284/789308 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 47413 event pairs, 828 based on Foata normal form. 18/7029 useless extension candidates. Maximal degree in co-relation 49911. Up to 6153 conditions per place. [2024-06-14 12:54:58,782 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 452 selfloop transitions, 66 changer transitions 0/523 dead transitions. [2024-06-14 12:54:58,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 523 transitions, 8363 flow [2024-06-14 12:54:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:54:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:54:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:54:58,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:54:58,784 INFO L175 Difference]: Start difference. First operand has 370 places, 505 transitions, 7279 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:54:58,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 523 transitions, 8363 flow [2024-06-14 12:55:01,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 523 transitions, 7607 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:55:01,935 INFO L231 Difference]: Finished difference. Result has 371 places, 505 transitions, 6660 flow [2024-06-14 12:55:01,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6523, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6660, PETRI_PLACES=371, PETRI_TRANSITIONS=505} [2024-06-14 12:55:01,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 12:55:01,935 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 505 transitions, 6660 flow [2024-06-14 12:55:01,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:01,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:01,936 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, 1, 1] [2024-06-14 12:55:01,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:55:01,936 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:01,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -430779625, now seen corresponding path program 10 times [2024-06-14 12:55:01,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:01,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118738347] [2024-06-14 12:55:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:01,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:04,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:04,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118738347] [2024-06-14 12:55:04,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118738347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:04,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:04,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:04,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625249331] [2024-06-14 12:55:04,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:04,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:04,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:04,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:55:04,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 505 transitions, 6660 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:04,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:04,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:55:04,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:06,911 INFO L124 PetriNetUnfolderBase]: 4213/7024 cut-off events. [2024-06-14 12:55:06,912 INFO L125 PetriNetUnfolderBase]: For 794937/794961 co-relation queries the response was YES. [2024-06-14 12:55:06,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48716 conditions, 7024 events. 4213/7024 cut-off events. For 794937/794961 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 47437 event pairs, 826 based on Foata normal form. 18/7041 useless extension candidates. Maximal degree in co-relation 48538. Up to 6055 conditions per place. [2024-06-14 12:55:07,019 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 451 selfloop transitions, 73 changer transitions 0/529 dead transitions. [2024-06-14 12:55:07,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 529 transitions, 7857 flow [2024-06-14 12:55:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:55:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:55:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:55:07,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:55:07,021 INFO L175 Difference]: Start difference. First operand has 371 places, 505 transitions, 6660 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:55:07,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 529 transitions, 7857 flow [2024-06-14 12:55:09,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 529 transitions, 7666 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 12:55:09,933 INFO L231 Difference]: Finished difference. Result has 371 places, 507 transitions, 6677 flow [2024-06-14 12:55:09,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6469, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6677, PETRI_PLACES=371, PETRI_TRANSITIONS=507} [2024-06-14 12:55:09,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 12:55:09,933 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 507 transitions, 6677 flow [2024-06-14 12:55:09,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:09,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:09,934 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, 1, 1] [2024-06-14 12:55:09,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:55:09,934 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:09,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2022561264, now seen corresponding path program 18 times [2024-06-14 12:55:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593762059] [2024-06-14 12:55:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:09,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593762059] [2024-06-14 12:55:13,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593762059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:13,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:13,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:13,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871744116] [2024-06-14 12:55:13,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:13,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:13,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:55:13,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 507 transitions, 6677 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:13,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:13,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:55:13,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:15,530 INFO L124 PetriNetUnfolderBase]: 4223/7049 cut-off events. [2024-06-14 12:55:15,530 INFO L125 PetriNetUnfolderBase]: For 806870/806894 co-relation queries the response was YES. [2024-06-14 12:55:15,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48864 conditions, 7049 events. 4223/7049 cut-off events. For 806870/806894 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 47708 event pairs, 909 based on Foata normal form. 4/7052 useless extension candidates. Maximal degree in co-relation 48685. Up to 5691 conditions per place. [2024-06-14 12:55:15,636 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 346 selfloop transitions, 180 changer transitions 0/531 dead transitions. [2024-06-14 12:55:15,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 531 transitions, 8082 flow [2024-06-14 12:55:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:55:15,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:55:15,638 INFO L175 Difference]: Start difference. First operand has 371 places, 507 transitions, 6677 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:55:15,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 531 transitions, 8082 flow [2024-06-14 12:55:18,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 531 transitions, 7897 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:55:18,578 INFO L231 Difference]: Finished difference. Result has 374 places, 510 transitions, 6901 flow [2024-06-14 12:55:18,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6901, PETRI_PLACES=374, PETRI_TRANSITIONS=510} [2024-06-14 12:55:18,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-14 12:55:18,579 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 510 transitions, 6901 flow [2024-06-14 12:55:18,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:18,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:18,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:18,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:55:18,580 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:18,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash -564969187, now seen corresponding path program 14 times [2024-06-14 12:55:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201475375] [2024-06-14 12:55:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:22,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:22,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201475375] [2024-06-14 12:55:22,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201475375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:22,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:22,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:22,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308680028] [2024-06-14 12:55:22,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:22,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:22,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:22,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:22,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:22,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:55:22,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 510 transitions, 6901 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:22,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:22,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:55:22,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:24,604 INFO L124 PetriNetUnfolderBase]: 4249/7101 cut-off events. [2024-06-14 12:55:24,604 INFO L125 PetriNetUnfolderBase]: For 840084/840106 co-relation queries the response was YES. [2024-06-14 12:55:24,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49863 conditions, 7101 events. 4249/7101 cut-off events. For 840084/840106 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 48095 event pairs, 1027 based on Foata normal form. 2/7101 useless extension candidates. Maximal degree in co-relation 49683. Up to 5018 conditions per place. [2024-06-14 12:55:24,711 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 255 selfloop transitions, 278 changer transitions 0/538 dead transitions. [2024-06-14 12:55:24,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 538 transitions, 8943 flow [2024-06-14 12:55:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:55:24,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:55:24,712 INFO L175 Difference]: Start difference. First operand has 374 places, 510 transitions, 6901 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:55:24,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 538 transitions, 8943 flow [2024-06-14 12:55:27,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 538 transitions, 8575 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:55:27,874 INFO L231 Difference]: Finished difference. Result has 376 places, 516 transitions, 7245 flow [2024-06-14 12:55:27,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6533, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7245, PETRI_PLACES=376, PETRI_TRANSITIONS=516} [2024-06-14 12:55:27,875 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-14 12:55:27,875 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 516 transitions, 7245 flow [2024-06-14 12:55:27,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:27,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:27,875 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, 1, 1] [2024-06-14 12:55:27,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:55:27,876 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:27,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash -564969404, now seen corresponding path program 19 times [2024-06-14 12:55:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:27,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180107135] [2024-06-14 12:55:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:27,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:31,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:31,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180107135] [2024-06-14 12:55:31,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180107135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:31,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:31,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:31,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279393127] [2024-06-14 12:55:31,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:31,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:31,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:31,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:31,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:55:31,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 516 transitions, 7245 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:31,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:31,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:55:31,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:33,789 INFO L124 PetriNetUnfolderBase]: 4243/7083 cut-off events. [2024-06-14 12:55:33,789 INFO L125 PetriNetUnfolderBase]: For 835920/835944 co-relation queries the response was YES. [2024-06-14 12:55:33,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49976 conditions, 7083 events. 4243/7083 cut-off events. For 835920/835944 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 47952 event pairs, 902 based on Foata normal form. 4/7086 useless extension candidates. Maximal degree in co-relation 49795. Up to 5722 conditions per place. [2024-06-14 12:55:33,910 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 351 selfloop transitions, 182 changer transitions 0/538 dead transitions. [2024-06-14 12:55:33,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 538 transitions, 8367 flow [2024-06-14 12:55:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:55:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:55:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 12:55:33,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 12:55:33,912 INFO L175 Difference]: Start difference. First operand has 376 places, 516 transitions, 7245 flow. Second operand 10 states and 162 transitions. [2024-06-14 12:55:33,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 538 transitions, 8367 flow [2024-06-14 12:55:38,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 538 transitions, 7547 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-14 12:55:38,090 INFO L231 Difference]: Finished difference. Result has 378 places, 516 transitions, 6795 flow [2024-06-14 12:55:38,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6425, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6795, PETRI_PLACES=378, PETRI_TRANSITIONS=516} [2024-06-14 12:55:38,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 12:55:38,091 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 516 transitions, 6795 flow [2024-06-14 12:55:38,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:38,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:38,091 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, 1, 1] [2024-06-14 12:55:38,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:55:38,091 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:38,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1683534313, now seen corresponding path program 11 times [2024-06-14 12:55:38,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:38,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065840385] [2024-06-14 12:55:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:38,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065840385] [2024-06-14 12:55:41,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065840385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:41,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:41,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263659874] [2024-06-14 12:55:41,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:41,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:41,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:41,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:55:41,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 516 transitions, 6795 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:41,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:41,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:55:41,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:43,329 INFO L124 PetriNetUnfolderBase]: 4251/7098 cut-off events. [2024-06-14 12:55:43,329 INFO L125 PetriNetUnfolderBase]: For 841363/841387 co-relation queries the response was YES. [2024-06-14 12:55:43,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49325 conditions, 7098 events. 4251/7098 cut-off events. For 841363/841387 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 48071 event pairs, 776 based on Foata normal form. 18/7115 useless extension candidates. Maximal degree in co-relation 49144. Up to 5324 conditions per place. [2024-06-14 12:55:43,431 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 450 selfloop transitions, 90 changer transitions 0/545 dead transitions. [2024-06-14 12:55:43,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 545 transitions, 8340 flow [2024-06-14 12:55:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:55:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:55:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:55:43,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:55:43,432 INFO L175 Difference]: Start difference. First operand has 378 places, 516 transitions, 6795 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:55:43,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 545 transitions, 8340 flow [2024-06-14 12:55:46,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 545 transitions, 7742 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 12:55:46,979 INFO L231 Difference]: Finished difference. Result has 374 places, 518 transitions, 6439 flow [2024-06-14 12:55:46,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6197, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6439, PETRI_PLACES=374, PETRI_TRANSITIONS=518} [2024-06-14 12:55:46,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-14 12:55:46,980 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 518 transitions, 6439 flow [2024-06-14 12:55:46,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:46,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:46,980 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, 1, 1] [2024-06-14 12:55:46,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:55:46,981 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:46,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:46,981 INFO L85 PathProgramCache]: Analyzing trace with hash -659097849, now seen corresponding path program 15 times [2024-06-14 12:55:46,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:46,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776452903] [2024-06-14 12:55:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:46,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:50,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:50,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776452903] [2024-06-14 12:55:50,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776452903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:50,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:50,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:50,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749470258] [2024-06-14 12:55:50,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:50,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:50,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:50,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:50,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:55:50,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 518 transitions, 6439 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:50,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:50,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:55:50,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:53,113 INFO L124 PetriNetUnfolderBase]: 4245/7085 cut-off events. [2024-06-14 12:55:53,114 INFO L125 PetriNetUnfolderBase]: For 832479/832501 co-relation queries the response was YES. [2024-06-14 12:55:53,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48757 conditions, 7085 events. 4245/7085 cut-off events. For 832479/832501 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 47913 event pairs, 1022 based on Foata normal form. 2/7085 useless extension candidates. Maximal degree in co-relation 48576. Up to 5024 conditions per place. [2024-06-14 12:55:53,211 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 253 selfloop transitions, 281 changer transitions 0/539 dead transitions. [2024-06-14 12:55:53,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 539 transitions, 8085 flow [2024-06-14 12:55:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:55:53,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 12:55:53,213 INFO L175 Difference]: Start difference. First operand has 374 places, 518 transitions, 6439 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:55:53,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 539 transitions, 8085 flow [2024-06-14 12:55:57,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 539 transitions, 7836 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:55:57,196 INFO L231 Difference]: Finished difference. Result has 378 places, 518 transitions, 6758 flow [2024-06-14 12:55:57,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6190, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6758, PETRI_PLACES=378, PETRI_TRANSITIONS=518} [2024-06-14 12:55:57,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 12:55:57,197 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 518 transitions, 6758 flow [2024-06-14 12:55:57,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:57,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:57,197 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, 1, 1] [2024-06-14 12:55:57,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:55:57,197 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:57,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash -666716409, now seen corresponding path program 16 times [2024-06-14 12:55:57,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:57,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897139103] [2024-06-14 12:55:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:57,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:00,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897139103] [2024-06-14 12:56:00,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897139103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:00,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:00,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:00,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446405614] [2024-06-14 12:56:00,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:00,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:00,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:00,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:56:00,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 518 transitions, 6758 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:00,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:00,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:56:00,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:03,332 INFO L124 PetriNetUnfolderBase]: 4239/7081 cut-off events. [2024-06-14 12:56:03,332 INFO L125 PetriNetUnfolderBase]: For 828373/828395 co-relation queries the response was YES. [2024-06-14 12:56:03,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48859 conditions, 7081 events. 4239/7081 cut-off events. For 828373/828395 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 47974 event pairs, 1022 based on Foata normal form. 2/7081 useless extension candidates. Maximal degree in co-relation 48677. Up to 5021 conditions per place. [2024-06-14 12:56:03,422 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 257 selfloop transitions, 276 changer transitions 0/538 dead transitions. [2024-06-14 12:56:03,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 538 transitions, 8138 flow [2024-06-14 12:56:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:56:03,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:56:03,424 INFO L175 Difference]: Start difference. First operand has 378 places, 518 transitions, 6758 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:56:03,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 538 transitions, 8138 flow [2024-06-14 12:56:07,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 538 transitions, 7544 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:56:07,420 INFO L231 Difference]: Finished difference. Result has 380 places, 518 transitions, 6722 flow [2024-06-14 12:56:07,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6722, PETRI_PLACES=380, PETRI_TRANSITIONS=518} [2024-06-14 12:56:07,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 12:56:07,421 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 518 transitions, 6722 flow [2024-06-14 12:56:07,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:07,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:07,421 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, 1, 1] [2024-06-14 12:56:07,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:56:07,421 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:07,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:07,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1011457497, now seen corresponding path program 12 times [2024-06-14 12:56:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:07,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658231251] [2024-06-14 12:56:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:07,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:10,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:10,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658231251] [2024-06-14 12:56:10,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658231251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:10,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:10,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114713303] [2024-06-14 12:56:10,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:10,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:10,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:56:10,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 518 transitions, 6722 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:10,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:10,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:56:10,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:13,220 INFO L124 PetriNetUnfolderBase]: 4214/7043 cut-off events. [2024-06-14 12:56:13,220 INFO L125 PetriNetUnfolderBase]: For 820546/820570 co-relation queries the response was YES. [2024-06-14 12:56:13,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47525 conditions, 7043 events. 4214/7043 cut-off events. For 820546/820570 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 47793 event pairs, 797 based on Foata normal form. 24/7066 useless extension candidates. Maximal degree in co-relation 47342. Up to 5294 conditions per place. [2024-06-14 12:56:13,322 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 457 selfloop transitions, 82 changer transitions 0/544 dead transitions. [2024-06-14 12:56:13,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 544 transitions, 7932 flow [2024-06-14 12:56:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:56:13,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:56:13,324 INFO L175 Difference]: Start difference. First operand has 380 places, 518 transitions, 6722 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:56:13,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 544 transitions, 7932 flow [2024-06-14 12:56:18,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 544 transitions, 7276 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-14 12:56:18,009 INFO L231 Difference]: Finished difference. Result has 378 places, 518 transitions, 6236 flow [2024-06-14 12:56:18,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6066, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6236, PETRI_PLACES=378, PETRI_TRANSITIONS=518} [2024-06-14 12:56:18,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 12:56:18,010 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 518 transitions, 6236 flow [2024-06-14 12:56:18,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:18,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:18,010 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, 1, 1] [2024-06-14 12:56:18,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:56:18,010 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:18,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash -347317591, now seen corresponding path program 1 times [2024-06-14 12:56:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106454696] [2024-06-14 12:56:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:20,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:20,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106454696] [2024-06-14 12:56:20,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106454696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:20,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:20,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:20,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421280891] [2024-06-14 12:56:20,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:20,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:20,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:56:20,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 518 transitions, 6236 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:20,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:20,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:56:20,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:23,300 INFO L124 PetriNetUnfolderBase]: 4301/7167 cut-off events. [2024-06-14 12:56:23,301 INFO L125 PetriNetUnfolderBase]: For 924490/924492 co-relation queries the response was YES. [2024-06-14 12:56:23,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49486 conditions, 7167 events. 4301/7167 cut-off events. For 924490/924492 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48619 event pairs, 975 based on Foata normal form. 8/7175 useless extension candidates. Maximal degree in co-relation 49303. Up to 6496 conditions per place. [2024-06-14 12:56:23,406 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 536 selfloop transitions, 21 changer transitions 0/562 dead transitions. [2024-06-14 12:56:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 562 transitions, 7870 flow [2024-06-14 12:56:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:56:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:56:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 12:56:23,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 12:56:23,408 INFO L175 Difference]: Start difference. First operand has 378 places, 518 transitions, 6236 flow. Second operand 10 states and 168 transitions. [2024-06-14 12:56:23,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 562 transitions, 7870 flow [2024-06-14 12:56:26,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 562 transitions, 7678 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:56:26,760 INFO L231 Difference]: Finished difference. Result has 380 places, 520 transitions, 6168 flow [2024-06-14 12:56:26,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6044, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6168, PETRI_PLACES=380, PETRI_TRANSITIONS=520} [2024-06-14 12:56:26,760 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 12:56:26,760 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 520 transitions, 6168 flow [2024-06-14 12:56:26,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:26,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:26,761 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, 1, 1] [2024-06-14 12:56:26,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:56:26,761 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:26,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash -742500131, now seen corresponding path program 2 times [2024-06-14 12:56:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:26,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366824972] [2024-06-14 12:56:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:26,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:29,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:29,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366824972] [2024-06-14 12:56:29,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366824972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:29,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:29,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:29,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795985129] [2024-06-14 12:56:29,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:29,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:29,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:29,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:29,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:29,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:56:29,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 520 transitions, 6168 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:29,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:29,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:56:29,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:32,088 INFO L124 PetriNetUnfolderBase]: 4278/7134 cut-off events. [2024-06-14 12:56:32,088 INFO L125 PetriNetUnfolderBase]: For 862730/862732 co-relation queries the response was YES. [2024-06-14 12:56:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47399 conditions, 7134 events. 4278/7134 cut-off events. For 862730/862732 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48395 event pairs, 998 based on Foata normal form. 10/7144 useless extension candidates. Maximal degree in co-relation 47215. Up to 6540 conditions per place. [2024-06-14 12:56:32,183 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 529 selfloop transitions, 18 changer transitions 0/552 dead transitions. [2024-06-14 12:56:32,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 552 transitions, 7386 flow [2024-06-14 12:56:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:56:32,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:56:32,184 INFO L175 Difference]: Start difference. First operand has 380 places, 520 transitions, 6168 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:56:32,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 552 transitions, 7386 flow [2024-06-14 12:56:36,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 552 transitions, 7316 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:36,236 INFO L231 Difference]: Finished difference. Result has 383 places, 520 transitions, 6139 flow [2024-06-14 12:56:36,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6139, PETRI_PLACES=383, PETRI_TRANSITIONS=520} [2024-06-14 12:56:36,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-14 12:56:36,237 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 520 transitions, 6139 flow [2024-06-14 12:56:36,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:36,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:36,237 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, 1, 1] [2024-06-14 12:56:36,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:56:36,237 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:36,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1745744361, now seen corresponding path program 3 times [2024-06-14 12:56:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:36,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345374787] [2024-06-14 12:56:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:39,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:39,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345374787] [2024-06-14 12:56:39,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345374787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:39,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:39,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:39,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089952715] [2024-06-14 12:56:39,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:39,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:39,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:39,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:56:39,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 520 transitions, 6139 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:39,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:39,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:56:39,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15