./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe015_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe015_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:00:20,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:00:20,852 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:00:20,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:00:20,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:00:20,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:00:20,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:00:20,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:00:20,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:00:20,887 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:00:20,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:00:20,887 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:00:20,888 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:00:20,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:00:20,889 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:00:20,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:00:20,889 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:00:20,890 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:00:20,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:00:20,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:00:20,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:00:20,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:00:20,891 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:00:20,891 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:00:20,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:00:20,891 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:00:20,892 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:00:20,892 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:00:20,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:00:20,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:00:20,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:00:20,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:00:20,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:00:20,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:00:20,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:00:20,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:00:20,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:00:20,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:00:20,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:00:20,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:00:20,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:00:20,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:00:20,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:00:20,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 02:00:21,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:00:21,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:00:21,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:00:21,170 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:00:21,170 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:00:21,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-28 02:00:22,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:00:22,642 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:00:22,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-28 02:00:22,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6aa0f72a/542d6a5a5d6e432db8a844b65aa34601/FLAG0677d8124 [2024-06-28 02:00:22,671 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6aa0f72a/542d6a5a5d6e432db8a844b65aa34601 [2024-06-28 02:00:22,673 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:00:22,674 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:00:22,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe015_rmo.yml/witness.yml [2024-06-28 02:00:22,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:00:22,839 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:00:22,841 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:00:22,841 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:00:22,844 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:00:22,845 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:00:22" (1/2) ... [2024-06-28 02:00:22,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476901b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:00:22, skipping insertion in model container [2024-06-28 02:00:22,846 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:00:22" (1/2) ... [2024-06-28 02:00:22,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59efb4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:00:22, skipping insertion in model container [2024-06-28 02:00:22,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:00:22" (2/2) ... [2024-06-28 02:00:22,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476901b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:22, skipping insertion in model container [2024-06-28 02:00:22,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:00:22" (2/2) ... [2024-06-28 02:00:22,852 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:00:23,041 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:00:23,042 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-28 02:00:23,042 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-28 02:00:23,043 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff1_used == (_Bool)0) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0) [2024-06-28 02:00:23,043 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:00:23,043 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-28 02:00:23,078 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:00:23,262 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i[988,1001] [2024-06-28 02:00:23,446 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:00:23,459 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 02:00:23,495 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i[988,1001] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:00:23,617 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:00:23,650 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:00:23,650 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23 WrapperNode [2024-06-28 02:00:23,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:00:23,651 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:00:23,652 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:00:23,652 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:00:23,657 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 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,678 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 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,719 INFO L138 Inliner]: procedures = 175, calls = 108, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 276 [2024-06-28 02:00:23,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:00:23,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:00:23,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:00:23,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:00:23,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,733 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,748 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-28 02:00:23,748 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,749 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,762 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,765 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,771 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:00:23,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:00:23,771 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:00:23,772 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:00:23,772 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (1/1) ... [2024-06-28 02:00:23,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:00:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:00:23,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 02:00:23,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 02:00:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 02:00:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 02:00:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 02:00:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 02:00:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:00:23,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:00:23,843 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:00:23,843 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:00:23,843 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:00:23,843 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:00:23,843 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:00:23,843 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:00:23,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:00:23,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 02:00:23,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:00:23,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:00:23,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:00:23,847 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:00:23,996 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:00:23,998 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:00:24,502 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:00:24,503 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:00:24,977 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:00:24,977 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:00:24,978 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:00:24 BoogieIcfgContainer [2024-06-28 02:00:24,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:00:24,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:00:24,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:00:24,983 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:00:24,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:00:22" (1/4) ... [2024-06-28 02:00:24,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:00:24, skipping insertion in model container [2024-06-28 02:00:24,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:00:22" (2/4) ... [2024-06-28 02:00:24,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329666 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:00:24, skipping insertion in model container [2024-06-28 02:00:24,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:00:23" (3/4) ... [2024-06-28 02:00:24,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329666 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:00:24, skipping insertion in model container [2024-06-28 02:00:24,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:00:24" (4/4) ... [2024-06-28 02:00:24,985 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_rmo.i [2024-06-28 02:00:25,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:00:25,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:00:25,000 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:00:25,061 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:00:25,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-28 02:00:25,128 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-28 02:00:25,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:00:25,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-28 02:00:25,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-28 02:00:25,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 42 transitions, 93 flow [2024-06-28 02:00:25,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:00:25,145 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;@3e064c39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:00:25,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 02:00:25,149 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:00:25,149 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:00:25,149 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:00:25,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:25,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:00:25,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:25,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash 896149976, now seen corresponding path program 1 times [2024-06-28 02:00:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:25,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50031232] [2024-06-28 02:00:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:27,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:27,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50031232] [2024-06-28 02:00:27,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50031232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:27,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:27,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:00:27,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890510070] [2024-06-28 02:00:27,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:27,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:00:27,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:00:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:00:27,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:00:27,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:27,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:27,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:00:27,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:28,262 INFO L124 PetriNetUnfolderBase]: 4076/6261 cut-off events. [2024-06-28 02:00:28,262 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 02:00:28,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12207 conditions, 6261 events. 4076/6261 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 36007 event pairs, 2658 based on Foata normal form. 0/6046 useless extension candidates. Maximal degree in co-relation 12195. Up to 5855 conditions per place. [2024-06-28 02:00:28,298 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-28 02:00:28,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 235 flow [2024-06-28 02:00:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:00:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:00:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-28 02:00:28,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:00:28,309 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 93 flow. Second operand 3 states and 90 transitions. [2024-06-28 02:00:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 235 flow [2024-06-28 02:00:28,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 230 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:28,314 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 127 flow [2024-06-28 02:00:28,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 02:00:28,318 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-06-28 02:00:28,318 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 127 flow [2024-06-28 02:00:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:28,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:28,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:28,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:00:28,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:28,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2087003551, now seen corresponding path program 1 times [2024-06-28 02:00:28,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:28,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294477054] [2024-06-28 02:00:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:28,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:29,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:29,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294477054] [2024-06-28 02:00:29,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294477054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:29,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:29,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:00:29,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519459437] [2024-06-28 02:00:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:29,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:00:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:00:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:00:29,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:00:29,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:29,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:29,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:00:29,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:30,671 INFO L124 PetriNetUnfolderBase]: 4064/6243 cut-off events. [2024-06-28 02:00:30,671 INFO L125 PetriNetUnfolderBase]: For 946/946 co-relation queries the response was YES. [2024-06-28 02:00:30,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 6243 events. 4064/6243 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35999 event pairs, 1864 based on Foata normal form. 6/6247 useless extension candidates. Maximal degree in co-relation 13488. Up to 5783 conditions per place. [2024-06-28 02:00:30,706 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 60 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-28 02:00:30,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 341 flow [2024-06-28 02:00:30,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:00:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:00:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-28 02:00:30,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:00:30,709 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 127 flow. Second operand 4 states and 120 transitions. [2024-06-28 02:00:30,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 341 flow [2024-06-28 02:00:30,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:30,712 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 173 flow [2024-06-28 02:00:30,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-28 02:00:30,713 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-28 02:00:30,713 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 173 flow [2024-06-28 02:00:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:30,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:30,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:00:30,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:30,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 793550175, now seen corresponding path program 1 times [2024-06-28 02:00:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765307030] [2024-06-28 02:00:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:33,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:33,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765307030] [2024-06-28 02:00:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765307030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:33,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:33,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:00:33,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644423718] [2024-06-28 02:00:33,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:33,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:00:33,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:00:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:00:33,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:00:33,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:33,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:33,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:00:33,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:34,557 INFO L124 PetriNetUnfolderBase]: 4055/6228 cut-off events. [2024-06-28 02:00:34,558 INFO L125 PetriNetUnfolderBase]: For 2664/2664 co-relation queries the response was YES. [2024-06-28 02:00:34,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14777 conditions, 6228 events. 4055/6228 cut-off events. For 2664/2664 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35991 event pairs, 1406 based on Foata normal form. 6/6232 useless extension candidates. Maximal degree in co-relation 14763. Up to 5714 conditions per place. [2024-06-28 02:00:34,596 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-28 02:00:34,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 514 flow [2024-06-28 02:00:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 02:00:34,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-28 02:00:34,602 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 173 flow. Second operand 6 states and 172 transitions. [2024-06-28 02:00:34,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 514 flow [2024-06-28 02:00:34,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:34,607 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 233 flow [2024-06-28 02:00:34,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-28 02:00:34,608 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-28 02:00:34,608 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 233 flow [2024-06-28 02:00:34,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:34,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:34,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:34,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:00:34,609 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:34,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1000243938, now seen corresponding path program 1 times [2024-06-28 02:00:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:34,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160374260] [2024-06-28 02:00:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:34,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:36,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:36,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160374260] [2024-06-28 02:00:36,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160374260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:36,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:36,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:00:36,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370424597] [2024-06-28 02:00:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:36,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:00:36,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:00:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:00:36,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:36,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:36,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:36,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:36,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:37,489 INFO L124 PetriNetUnfolderBase]: 4050/6222 cut-off events. [2024-06-28 02:00:37,489 INFO L125 PetriNetUnfolderBase]: For 5138/5138 co-relation queries the response was YES. [2024-06-28 02:00:37,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16036 conditions, 6222 events. 4050/6222 cut-off events. For 5138/5138 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35911 event pairs, 1608 based on Foata normal form. 2/6220 useless extension candidates. Maximal degree in co-relation 16019. Up to 5752 conditions per place. [2024-06-28 02:00:37,517 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 68 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-28 02:00:37,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 509 flow [2024-06-28 02:00:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:00:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:00:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-28 02:00:37,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 02:00:37,520 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 233 flow. Second operand 5 states and 125 transitions. [2024-06-28 02:00:37,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 509 flow [2024-06-28 02:00:37,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 471 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:37,524 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 296 flow [2024-06-28 02:00:37,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-28 02:00:37,525 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-28 02:00:37,525 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 296 flow [2024-06-28 02:00:37,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:37,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:37,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:00:37,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:37,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -925212598, now seen corresponding path program 1 times [2024-06-28 02:00:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397695421] [2024-06-28 02:00:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:38,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397695421] [2024-06-28 02:00:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397695421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:38,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:00:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339863379] [2024-06-28 02:00:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:38,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:00:38,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:38,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:00:38,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:00:38,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:38,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2024-06-28 02:00:38,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:38,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:38,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:40,186 INFO L124 PetriNetUnfolderBase]: 4040/6208 cut-off events. [2024-06-28 02:00:40,186 INFO L125 PetriNetUnfolderBase]: For 8041/8044 co-relation queries the response was YES. [2024-06-28 02:00:40,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17478 conditions, 6208 events. 4040/6208 cut-off events. For 8041/8044 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35973 event pairs, 1604 based on Foata normal form. 6/6211 useless extension candidates. Maximal degree in co-relation 17458. Up to 5744 conditions per place. [2024-06-28 02:00:40,223 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 67 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-28 02:00:40,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 508 flow [2024-06-28 02:00:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:00:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:00:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:00:40,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 02:00:40,225 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 296 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:00:40,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 508 flow [2024-06-28 02:00:40,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 484 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:40,237 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 307 flow [2024-06-28 02:00:40,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-28 02:00:40,237 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-06-28 02:00:40,238 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 307 flow [2024-06-28 02:00:40,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2024-06-28 02:00:40,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:40,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:40,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:00:40,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:40,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:40,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1916884995, now seen corresponding path program 1 times [2024-06-28 02:00:40,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:40,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736508992] [2024-06-28 02:00:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:40,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:41,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:41,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736508992] [2024-06-28 02:00:41,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736508992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:41,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:41,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:41,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679576194] [2024-06-28 02:00:41,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:41,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:41,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:41,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:41,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:41,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:41,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:41,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:43,488 INFO L124 PetriNetUnfolderBase]: 4066/6255 cut-off events. [2024-06-28 02:00:43,488 INFO L125 PetriNetUnfolderBase]: For 9184/9184 co-relation queries the response was YES. [2024-06-28 02:00:43,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17885 conditions, 6255 events. 4066/6255 cut-off events. For 9184/9184 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36299 event pairs, 1467 based on Foata normal form. 2/6252 useless extension candidates. Maximal degree in co-relation 17862. Up to 5637 conditions per place. [2024-06-28 02:00:43,519 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 81 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-28 02:00:43,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 685 flow [2024-06-28 02:00:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:00:43,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-06-28 02:00:43,521 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 307 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:00:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 685 flow [2024-06-28 02:00:43,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 666 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:43,527 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 423 flow [2024-06-28 02:00:43,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-28 02:00:43,527 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-06-28 02:00:43,528 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 423 flow [2024-06-28 02:00:43,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:43,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:43,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:00:43,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:43,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1382567615, now seen corresponding path program 2 times [2024-06-28 02:00:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502810885] [2024-06-28 02:00:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:45,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502810885] [2024-06-28 02:00:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502810885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:45,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:45,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887341763] [2024-06-28 02:00:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:45,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:45,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:45,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:45,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:45,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:45,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:46,731 INFO L124 PetriNetUnfolderBase]: 4061/6237 cut-off events. [2024-06-28 02:00:46,731 INFO L125 PetriNetUnfolderBase]: For 13600/13600 co-relation queries the response was YES. [2024-06-28 02:00:46,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 6237 events. 4061/6237 cut-off events. For 13600/13600 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36133 event pairs, 1483 based on Foata normal form. 2/6230 useless extension candidates. Maximal degree in co-relation 19451. Up to 5634 conditions per place. [2024-06-28 02:00:46,782 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 75 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-28 02:00:46,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 768 flow [2024-06-28 02:00:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-28 02:00:46,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243055555555556 [2024-06-28 02:00:46,784 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 423 flow. Second operand 6 states and 151 transitions. [2024-06-28 02:00:46,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 768 flow [2024-06-28 02:00:46,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 723 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:46,798 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 484 flow [2024-06-28 02:00:46,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-28 02:00:46,799 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-28 02:00:46,799 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 484 flow [2024-06-28 02:00:46,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:46,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:46,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:46,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:00:46,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:46,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash 199299273, now seen corresponding path program 1 times [2024-06-28 02:00:46,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:46,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097132243] [2024-06-28 02:00:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:46,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:48,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:48,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097132243] [2024-06-28 02:00:48,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097132243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:48,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:48,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744671735] [2024-06-28 02:00:48,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:48,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:48,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:48,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:48,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:48,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:48,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:49,756 INFO L124 PetriNetUnfolderBase]: 4239/6500 cut-off events. [2024-06-28 02:00:49,756 INFO L125 PetriNetUnfolderBase]: For 16285/16287 co-relation queries the response was YES. [2024-06-28 02:00:49,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 6500 events. 4239/6500 cut-off events. For 16285/16287 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37453 event pairs, 1468 based on Foata normal form. 6/6501 useless extension candidates. Maximal degree in co-relation 21032. Up to 5772 conditions per place. [2024-06-28 02:00:49,786 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 95 selfloop transitions, 47 changer transitions 0/149 dead transitions. [2024-06-28 02:00:49,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 149 transitions, 1131 flow [2024-06-28 02:00:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:00:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:00:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-28 02:00:49,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-28 02:00:49,788 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 484 flow. Second operand 7 states and 188 transitions. [2024-06-28 02:00:49,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 149 transitions, 1131 flow [2024-06-28 02:00:49,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 149 transitions, 1040 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:49,800 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 741 flow [2024-06-28 02:00:49,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2024-06-28 02:00:49,800 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 29 predicate places. [2024-06-28 02:00:49,801 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 741 flow [2024-06-28 02:00:49,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:49,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:49,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:49,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:00:49,801 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:49,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash -706105891, now seen corresponding path program 2 times [2024-06-28 02:00:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:49,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466968676] [2024-06-28 02:00:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:49,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466968676] [2024-06-28 02:00:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466968676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:51,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:51,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961896819] [2024-06-28 02:00:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:51,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:51,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:51,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 741 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:51,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:51,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:51,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:53,050 INFO L124 PetriNetUnfolderBase]: 4335/6654 cut-off events. [2024-06-28 02:00:53,050 INFO L125 PetriNetUnfolderBase]: For 19793/19797 co-relation queries the response was YES. [2024-06-28 02:00:53,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22468 conditions, 6654 events. 4335/6654 cut-off events. For 19793/19797 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38387 event pairs, 1483 based on Foata normal form. 10/6659 useless extension candidates. Maximal degree in co-relation 22436. Up to 5854 conditions per place. [2024-06-28 02:00:53,086 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 86 selfloop transitions, 54 changer transitions 0/147 dead transitions. [2024-06-28 02:00:53,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 147 transitions, 1267 flow [2024-06-28 02:00:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-28 02:00:53,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-06-28 02:00:53,088 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 741 flow. Second operand 6 states and 158 transitions. [2024-06-28 02:00:53,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 147 transitions, 1267 flow [2024-06-28 02:00:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1194 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:53,101 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 896 flow [2024-06-28 02:00:53,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2024-06-28 02:00:53,102 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-28 02:00:53,102 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 896 flow [2024-06-28 02:00:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:53,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:53,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:53,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:00:53,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:53,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash -89808577, now seen corresponding path program 3 times [2024-06-28 02:00:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:53,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176933291] [2024-06-28 02:00:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:54,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176933291] [2024-06-28 02:00:54,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176933291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:54,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:54,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:54,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524332546] [2024-06-28 02:00:54,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:54,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:54,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:54,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:54,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:54,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:54,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:54,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:54,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:54,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:56,183 INFO L124 PetriNetUnfolderBase]: 4319/6620 cut-off events. [2024-06-28 02:00:56,184 INFO L125 PetriNetUnfolderBase]: For 22472/22490 co-relation queries the response was YES. [2024-06-28 02:00:56,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22629 conditions, 6620 events. 4319/6620 cut-off events. For 22472/22490 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38172 event pairs, 1489 based on Foata normal form. 18/6626 useless extension candidates. Maximal degree in co-relation 22596. Up to 5841 conditions per place. [2024-06-28 02:00:56,218 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 82 selfloop transitions, 53 changer transitions 0/142 dead transitions. [2024-06-28 02:00:56,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 1274 flow [2024-06-28 02:00:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:00:56,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 02:00:56,220 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 896 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:00:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 1274 flow [2024-06-28 02:00:56,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1161 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 02:00:56,241 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 902 flow [2024-06-28 02:00:56,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-28 02:00:56,241 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-28 02:00:56,241 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 902 flow [2024-06-28 02:00:56,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:56,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:56,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:56,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:00:56,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:56,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:56,243 INFO L85 PathProgramCache]: Analyzing trace with hash -89798657, now seen corresponding path program 1 times [2024-06-28 02:00:56,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:56,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780525561] [2024-06-28 02:00:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:56,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:58,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780525561] [2024-06-28 02:00:58,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780525561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:58,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:58,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:58,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274898038] [2024-06-28 02:00:58,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:58,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:58,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:58,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:00:58,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 902 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:58,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:58,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:00:58,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:00,029 INFO L124 PetriNetUnfolderBase]: 4311/6619 cut-off events. [2024-06-28 02:01:00,029 INFO L125 PetriNetUnfolderBase]: For 22391/22394 co-relation queries the response was YES. [2024-06-28 02:01:00,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22492 conditions, 6619 events. 4311/6619 cut-off events. For 22391/22394 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38128 event pairs, 1477 based on Foata normal form. 6/6622 useless extension candidates. Maximal degree in co-relation 22459. Up to 6079 conditions per place. [2024-06-28 02:01:00,063 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 119 selfloop transitions, 16 changer transitions 0/142 dead transitions. [2024-06-28 02:01:00,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1290 flow [2024-06-28 02:01:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:01:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:01:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-28 02:01:00,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-28 02:01:00,067 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 902 flow. Second operand 6 states and 147 transitions. [2024-06-28 02:01:00,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1290 flow [2024-06-28 02:01:00,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 142 transitions, 1063 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 02:01:00,085 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 751 flow [2024-06-28 02:01:00,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=84, PETRI_TRANSITIONS=109} [2024-06-28 02:01:00,086 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-28 02:01:00,086 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 751 flow [2024-06-28 02:01:00,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:00,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:00,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:00,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:01:00,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:00,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash 317992092, now seen corresponding path program 1 times [2024-06-28 02:01:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:00,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296956109] [2024-06-28 02:01:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:00,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296956109] [2024-06-28 02:01:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296956109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:02,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:02,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033455735] [2024-06-28 02:01:02,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:02,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:02,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:02,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 109 transitions, 751 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:02,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:02,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:02,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:04,271 INFO L124 PetriNetUnfolderBase]: 4399/6759 cut-off events. [2024-06-28 02:01:04,284 INFO L125 PetriNetUnfolderBase]: For 23247/23247 co-relation queries the response was YES. [2024-06-28 02:01:04,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23323 conditions, 6759 events. 4399/6759 cut-off events. For 23247/23247 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 39065 event pairs, 1470 based on Foata normal form. 2/6759 useless extension candidates. Maximal degree in co-relation 23291. Up to 6156 conditions per place. [2024-06-28 02:01:04,315 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 146 selfloop transitions, 25 changer transitions 0/178 dead transitions. [2024-06-28 02:01:04,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 178 transitions, 1381 flow [2024-06-28 02:01:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:01:04,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 02:01:04,318 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 751 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:01:04,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 178 transitions, 1381 flow [2024-06-28 02:01:04,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 178 transitions, 1329 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:01:04,336 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 851 flow [2024-06-28 02:01:04,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-28 02:01:04,338 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-28 02:01:04,338 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 851 flow [2024-06-28 02:01:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:04,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:04,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:04,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:01:04,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:04,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash -414451646, now seen corresponding path program 2 times [2024-06-28 02:01:04,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:04,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197992698] [2024-06-28 02:01:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:04,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:06,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:06,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197992698] [2024-06-28 02:01:06,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197992698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:06,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:06,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395933148] [2024-06-28 02:01:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:06,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:06,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:06,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 851 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:06,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:06,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:06,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:08,247 INFO L124 PetriNetUnfolderBase]: 4425/6787 cut-off events. [2024-06-28 02:01:08,248 INFO L125 PetriNetUnfolderBase]: For 29772/29772 co-relation queries the response was YES. [2024-06-28 02:01:08,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24974 conditions, 6787 events. 4425/6787 cut-off events. For 29772/29772 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39230 event pairs, 1337 based on Foata normal form. 2/6784 useless extension candidates. Maximal degree in co-relation 24940. Up to 5679 conditions per place. [2024-06-28 02:01:08,285 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 105 selfloop transitions, 64 changer transitions 0/176 dead transitions. [2024-06-28 02:01:08,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 176 transitions, 1477 flow [2024-06-28 02:01:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:01:08,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-28 02:01:08,287 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 851 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:01:08,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 176 transitions, 1477 flow [2024-06-28 02:01:08,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 176 transitions, 1394 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:08,309 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 1053 flow [2024-06-28 02:01:08,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2024-06-28 02:01:08,310 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-28 02:01:08,310 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 1053 flow [2024-06-28 02:01:08,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:08,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:08,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:08,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:01:08,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:08,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1502621694, now seen corresponding path program 3 times [2024-06-28 02:01:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43973400] [2024-06-28 02:01:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:10,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43973400] [2024-06-28 02:01:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43973400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:10,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:10,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950343609] [2024-06-28 02:01:10,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:10,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:10,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:10,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:10,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:10,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:10,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:10,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:10,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:10,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:12,076 INFO L124 PetriNetUnfolderBase]: 4420/6759 cut-off events. [2024-06-28 02:01:12,076 INFO L125 PetriNetUnfolderBase]: For 37360/37360 co-relation queries the response was YES. [2024-06-28 02:01:12,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26902 conditions, 6759 events. 4420/6759 cut-off events. For 37360/37360 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38928 event pairs, 1423 based on Foata normal form. 2/6737 useless extension candidates. Maximal degree in co-relation 26867. Up to 5676 conditions per place. [2024-06-28 02:01:12,115 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 98 selfloop transitions, 70 changer transitions 0/175 dead transitions. [2024-06-28 02:01:12,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 175 transitions, 1630 flow [2024-06-28 02:01:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:01:12,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-28 02:01:12,120 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 1053 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:01:12,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 175 transitions, 1630 flow [2024-06-28 02:01:12,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 175 transitions, 1543 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-28 02:01:12,154 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1177 flow [2024-06-28 02:01:12,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-28 02:01:12,155 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2024-06-28 02:01:12,155 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1177 flow [2024-06-28 02:01:12,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:12,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:12,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:12,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:01:12,156 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:12,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1037821360, now seen corresponding path program 1 times [2024-06-28 02:01:12,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:12,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28028510] [2024-06-28 02:01:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28028510] [2024-06-28 02:01:13,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28028510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:13,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:13,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:01:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539531298] [2024-06-28 02:01:13,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:13,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:01:13,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:13,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:01:13,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:01:13,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:13,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1177 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:13,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:13,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:13,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:15,350 INFO L124 PetriNetUnfolderBase]: 4417/6807 cut-off events. [2024-06-28 02:01:15,350 INFO L125 PetriNetUnfolderBase]: For 36434/36434 co-relation queries the response was YES. [2024-06-28 02:01:15,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26599 conditions, 6807 events. 4417/6807 cut-off events. For 36434/36434 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 39490 event pairs, 1483 based on Foata normal form. 1/6806 useless extension candidates. Maximal degree in co-relation 26562. Up to 6304 conditions per place. [2024-06-28 02:01:15,381 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 138 selfloop transitions, 11 changer transitions 0/156 dead transitions. [2024-06-28 02:01:15,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1593 flow [2024-06-28 02:01:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:01:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:01:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 02:01:15,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-28 02:01:15,383 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1177 flow. Second operand 5 states and 118 transitions. [2024-06-28 02:01:15,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1593 flow [2024-06-28 02:01:15,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1468 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 02:01:15,417 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 1146 flow [2024-06-28 02:01:15,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1146, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-06-28 02:01:15,419 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 45 predicate places. [2024-06-28 02:01:15,419 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 1146 flow [2024-06-28 02:01:15,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:15,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:15,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:15,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:01:15,420 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:15,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash 412997150, now seen corresponding path program 1 times [2024-06-28 02:01:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:15,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488288846] [2024-06-28 02:01:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:17,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:17,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488288846] [2024-06-28 02:01:17,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488288846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:17,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:17,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461156435] [2024-06-28 02:01:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:17,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:17,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:17,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:17,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:17,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:19,421 INFO L124 PetriNetUnfolderBase]: 4407/6790 cut-off events. [2024-06-28 02:01:19,421 INFO L125 PetriNetUnfolderBase]: For 40691/40691 co-relation queries the response was YES. [2024-06-28 02:01:19,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27138 conditions, 6790 events. 4407/6790 cut-off events. For 40691/40691 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 39439 event pairs, 1479 based on Foata normal form. 4/6792 useless extension candidates. Maximal degree in co-relation 27098. Up to 6173 conditions per place. [2024-06-28 02:01:19,465 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 162 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2024-06-28 02:01:19,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 194 transitions, 1686 flow [2024-06-28 02:01:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:01:19,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-28 02:01:19,467 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 1146 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:01:19,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 194 transitions, 1686 flow [2024-06-28 02:01:19,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 194 transitions, 1654 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-28 02:01:19,512 INFO L231 Difference]: Finished difference. Result has 104 places, 135 transitions, 1173 flow [2024-06-28 02:01:19,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=104, PETRI_TRANSITIONS=135} [2024-06-28 02:01:19,513 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 52 predicate places. [2024-06-28 02:01:19,513 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 135 transitions, 1173 flow [2024-06-28 02:01:19,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:19,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:19,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:19,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:01:19,514 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:19,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:19,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1685645938, now seen corresponding path program 2 times [2024-06-28 02:01:19,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:19,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736118092] [2024-06-28 02:01:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:19,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:21,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:21,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736118092] [2024-06-28 02:01:21,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736118092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:21,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:21,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:21,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010168003] [2024-06-28 02:01:21,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:21,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:21,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:21,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:21,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 135 transitions, 1173 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:21,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:21,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:21,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:23,474 INFO L124 PetriNetUnfolderBase]: 4521/6971 cut-off events. [2024-06-28 02:01:23,474 INFO L125 PetriNetUnfolderBase]: For 45234/45238 co-relation queries the response was YES. [2024-06-28 02:01:23,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28388 conditions, 6971 events. 4521/6971 cut-off events. For 45234/45238 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40587 event pairs, 1326 based on Foata normal form. 8/6974 useless extension candidates. Maximal degree in co-relation 28345. Up to 5760 conditions per place. [2024-06-28 02:01:23,518 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 113 selfloop transitions, 77 changer transitions 0/197 dead transitions. [2024-06-28 02:01:23,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 197 transitions, 1929 flow [2024-06-28 02:01:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 02:01:23,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-28 02:01:23,520 INFO L175 Difference]: Start difference. First operand has 104 places, 135 transitions, 1173 flow. Second operand 7 states and 187 transitions. [2024-06-28 02:01:23,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 197 transitions, 1929 flow [2024-06-28 02:01:23,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1879 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:01:23,566 INFO L231 Difference]: Finished difference. Result has 104 places, 143 transitions, 1400 flow [2024-06-28 02:01:23,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=104, PETRI_TRANSITIONS=143} [2024-06-28 02:01:23,567 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 52 predicate places. [2024-06-28 02:01:23,567 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 143 transitions, 1400 flow [2024-06-28 02:01:23,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:23,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:23,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:23,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:01:23,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:23,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1415431268, now seen corresponding path program 3 times [2024-06-28 02:01:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385361304] [2024-06-28 02:01:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:25,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:25,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385361304] [2024-06-28 02:01:25,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385361304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:25,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:25,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:25,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810320895] [2024-06-28 02:01:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:25,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:25,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:26,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:26,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 143 transitions, 1400 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:26,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:26,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:26,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:28,017 INFO L124 PetriNetUnfolderBase]: 4573/7032 cut-off events. [2024-06-28 02:01:28,017 INFO L125 PetriNetUnfolderBase]: For 50681/50681 co-relation queries the response was YES. [2024-06-28 02:01:28,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29470 conditions, 7032 events. 4573/7032 cut-off events. For 50681/50681 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40766 event pairs, 1341 based on Foata normal form. 4/7031 useless extension candidates. Maximal degree in co-relation 29426. Up to 5804 conditions per place. [2024-06-28 02:01:28,062 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 121 selfloop transitions, 79 changer transitions 0/207 dead transitions. [2024-06-28 02:01:28,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 207 transitions, 2092 flow [2024-06-28 02:01:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-28 02:01:28,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:01:28,064 INFO L175 Difference]: Start difference. First operand has 104 places, 143 transitions, 1400 flow. Second operand 8 states and 208 transitions. [2024-06-28 02:01:28,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 207 transitions, 2092 flow [2024-06-28 02:01:28,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 207 transitions, 1978 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 02:01:28,110 INFO L231 Difference]: Finished difference. Result has 109 places, 147 transitions, 1517 flow [2024-06-28 02:01:28,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1517, PETRI_PLACES=109, PETRI_TRANSITIONS=147} [2024-06-28 02:01:28,111 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-28 02:01:28,111 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 147 transitions, 1517 flow [2024-06-28 02:01:28,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:28,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:28,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:28,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:01:28,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:28,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash -328861536, now seen corresponding path program 1 times [2024-06-28 02:01:28,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:28,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085098336] [2024-06-28 02:01:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:28,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:30,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:30,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085098336] [2024-06-28 02:01:30,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085098336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:30,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:30,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:30,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631342885] [2024-06-28 02:01:30,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:30,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:30,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 147 transitions, 1517 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:30,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:30,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:30,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:32,317 INFO L124 PetriNetUnfolderBase]: 4615/7105 cut-off events. [2024-06-28 02:01:32,317 INFO L125 PetriNetUnfolderBase]: For 55579/55583 co-relation queries the response was YES. [2024-06-28 02:01:32,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29951 conditions, 7105 events. 4615/7105 cut-off events. For 55579/55583 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 41314 event pairs, 1360 based on Foata normal form. 8/7108 useless extension candidates. Maximal degree in co-relation 29906. Up to 6198 conditions per place. [2024-06-28 02:01:32,360 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 135 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-28 02:01:32,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 2075 flow [2024-06-28 02:01:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:01:32,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 02:01:32,362 INFO L175 Difference]: Start difference. First operand has 109 places, 147 transitions, 1517 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:01:32,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 2075 flow [2024-06-28 02:01:32,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 199 transitions, 1885 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:32,418 INFO L231 Difference]: Finished difference. Result has 110 places, 150 transitions, 1495 flow [2024-06-28 02:01:32,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=110, PETRI_TRANSITIONS=150} [2024-06-28 02:01:32,419 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-28 02:01:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 150 transitions, 1495 flow [2024-06-28 02:01:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:32,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:32,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:01:32,420 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:32,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash -406658434, now seen corresponding path program 4 times [2024-06-28 02:01:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591857342] [2024-06-28 02:01:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:34,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:34,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591857342] [2024-06-28 02:01:34,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591857342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:34,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:34,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:34,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505249303] [2024-06-28 02:01:34,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:34,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:34,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:34,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 150 transitions, 1495 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:34,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:34,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:34,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:36,246 INFO L124 PetriNetUnfolderBase]: 4605/7057 cut-off events. [2024-06-28 02:01:36,246 INFO L125 PetriNetUnfolderBase]: For 60098/60110 co-relation queries the response was YES. [2024-06-28 02:01:36,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30313 conditions, 7057 events. 4605/7057 cut-off events. For 60098/60110 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 40984 event pairs, 1376 based on Foata normal form. 12/7051 useless extension candidates. Maximal degree in co-relation 30267. Up to 5858 conditions per place. [2024-06-28 02:01:36,286 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 112 selfloop transitions, 79 changer transitions 0/198 dead transitions. [2024-06-28 02:01:36,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 198 transitions, 2085 flow [2024-06-28 02:01:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:01:36,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-28 02:01:36,289 INFO L175 Difference]: Start difference. First operand has 110 places, 150 transitions, 1495 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:01:36,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 198 transitions, 2085 flow [2024-06-28 02:01:36,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 198 transitions, 1933 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:36,352 INFO L231 Difference]: Finished difference. Result has 112 places, 150 transitions, 1511 flow [2024-06-28 02:01:36,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1511, PETRI_PLACES=112, PETRI_TRANSITIONS=150} [2024-06-28 02:01:36,353 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-28 02:01:36,353 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 150 transitions, 1511 flow [2024-06-28 02:01:36,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:36,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:36,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:36,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:01:36,354 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:36,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash -663366334, now seen corresponding path program 5 times [2024-06-28 02:01:36,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:36,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735112659] [2024-06-28 02:01:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:36,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:38,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735112659] [2024-06-28 02:01:38,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735112659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:38,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:38,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:38,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070971912] [2024-06-28 02:01:38,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:38,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:38,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:38,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 1511 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:38,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:38,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:38,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:40,777 INFO L124 PetriNetUnfolderBase]: 4595/7007 cut-off events. [2024-06-28 02:01:40,777 INFO L125 PetriNetUnfolderBase]: For 63376/63376 co-relation queries the response was YES. [2024-06-28 02:01:40,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30371 conditions, 7007 events. 4595/7007 cut-off events. For 63376/63376 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 40174 event pairs, 1469 based on Foata normal form. 4/6985 useless extension candidates. Maximal degree in co-relation 30324. Up to 5850 conditions per place. [2024-06-28 02:01:40,835 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 115 selfloop transitions, 82 changer transitions 0/204 dead transitions. [2024-06-28 02:01:40,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 204 transitions, 2061 flow [2024-06-28 02:01:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:01:40,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 02:01:40,838 INFO L175 Difference]: Start difference. First operand has 112 places, 150 transitions, 1511 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:01:40,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 204 transitions, 2061 flow [2024-06-28 02:01:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 1770 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 02:01:40,906 INFO L231 Difference]: Finished difference. Result has 113 places, 150 transitions, 1393 flow [2024-06-28 02:01:40,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1393, PETRI_PLACES=113, PETRI_TRANSITIONS=150} [2024-06-28 02:01:40,907 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 61 predicate places. [2024-06-28 02:01:40,907 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 150 transitions, 1393 flow [2024-06-28 02:01:40,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:40,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:40,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:40,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:01:40,908 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:40,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash 459042218, now seen corresponding path program 2 times [2024-06-28 02:01:40,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:40,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655752270] [2024-06-28 02:01:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655752270] [2024-06-28 02:01:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655752270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:43,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:43,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:43,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625793606] [2024-06-28 02:01:43,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:43,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:43,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:43,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:43,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:43,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 150 transitions, 1393 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:43,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:43,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:43,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:45,329 INFO L124 PetriNetUnfolderBase]: 4637/7137 cut-off events. [2024-06-28 02:01:45,329 INFO L125 PetriNetUnfolderBase]: For 63368/63380 co-relation queries the response was YES. [2024-06-28 02:01:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30714 conditions, 7137 events. 4637/7137 cut-off events. For 63368/63380 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 41457 event pairs, 1381 based on Foata normal form. 12/7137 useless extension candidates. Maximal degree in co-relation 30667. Up to 6242 conditions per place. [2024-06-28 02:01:45,382 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 136 selfloop transitions, 56 changer transitions 0/199 dead transitions. [2024-06-28 02:01:45,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 199 transitions, 1955 flow [2024-06-28 02:01:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:01:45,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 02:01:45,384 INFO L175 Difference]: Start difference. First operand has 113 places, 150 transitions, 1393 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:01:45,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 199 transitions, 1955 flow [2024-06-28 02:01:45,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1636 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-28 02:01:45,459 INFO L231 Difference]: Finished difference. Result has 109 places, 153 transitions, 1245 flow [2024-06-28 02:01:45,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=109, PETRI_TRANSITIONS=153} [2024-06-28 02:01:45,459 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-28 02:01:45,459 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 153 transitions, 1245 flow [2024-06-28 02:01:45,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:45,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:45,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:45,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:01:45,460 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:45,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:45,461 INFO L85 PathProgramCache]: Analyzing trace with hash -397127298, now seen corresponding path program 3 times [2024-06-28 02:01:45,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:45,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334522663] [2024-06-28 02:01:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:45,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:47,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334522663] [2024-06-28 02:01:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334522663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:47,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:47,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611483615] [2024-06-28 02:01:47,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:47,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:47,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:47,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:47,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 153 transitions, 1245 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:47,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:47,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:47,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:49,482 INFO L124 PetriNetUnfolderBase]: 4629/7005 cut-off events. [2024-06-28 02:01:49,482 INFO L125 PetriNetUnfolderBase]: For 67237/67249 co-relation queries the response was YES. [2024-06-28 02:01:49,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30434 conditions, 7005 events. 4629/7005 cut-off events. For 67237/67249 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 40250 event pairs, 1293 based on Foata normal form. 12/7005 useless extension candidates. Maximal degree in co-relation 30389. Up to 6088 conditions per place. [2024-06-28 02:01:49,529 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 130 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-28 02:01:49,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 201 transitions, 1809 flow [2024-06-28 02:01:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:01:49,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 02:01:49,531 INFO L175 Difference]: Start difference. First operand has 109 places, 153 transitions, 1245 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:01:49,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 201 transitions, 1809 flow [2024-06-28 02:01:49,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 201 transitions, 1664 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:49,595 INFO L231 Difference]: Finished difference. Result has 111 places, 156 transitions, 1292 flow [2024-06-28 02:01:49,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=111, PETRI_TRANSITIONS=156} [2024-06-28 02:01:49,595 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-28 02:01:49,595 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 156 transitions, 1292 flow [2024-06-28 02:01:49,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:49,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:49,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:01:49,596 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:49,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2107688624, now seen corresponding path program 1 times [2024-06-28 02:01:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:49,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834009129] [2024-06-28 02:01:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:51,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:51,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834009129] [2024-06-28 02:01:51,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834009129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:51,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:51,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:01:51,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638293254] [2024-06-28 02:01:51,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:51,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:01:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:51,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:01:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:01:51,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:51,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 156 transitions, 1292 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:51,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:51,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:51,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:53,260 INFO L124 PetriNetUnfolderBase]: 4723/7273 cut-off events. [2024-06-28 02:01:53,260 INFO L125 PetriNetUnfolderBase]: For 74263/74263 co-relation queries the response was YES. [2024-06-28 02:01:53,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31796 conditions, 7273 events. 4723/7273 cut-off events. For 74263/74263 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 42242 event pairs, 1471 based on Foata normal form. 6/7269 useless extension candidates. Maximal degree in co-relation 31750. Up to 6395 conditions per place. [2024-06-28 02:01:53,306 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 171 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2024-06-28 02:01:53,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 203 transitions, 1976 flow [2024-06-28 02:01:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:01:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:01:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-28 02:01:53,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-06-28 02:01:53,308 INFO L175 Difference]: Start difference. First operand has 111 places, 156 transitions, 1292 flow. Second operand 6 states and 149 transitions. [2024-06-28 02:01:53,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 203 transitions, 1976 flow [2024-06-28 02:01:53,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 203 transitions, 1808 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:53,376 INFO L231 Difference]: Finished difference. Result has 114 places, 167 transitions, 1311 flow [2024-06-28 02:01:53,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=114, PETRI_TRANSITIONS=167} [2024-06-28 02:01:53,377 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 62 predicate places. [2024-06-28 02:01:53,377 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 167 transitions, 1311 flow [2024-06-28 02:01:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:53,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:53,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:53,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:01:53,378 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:53,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:53,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1883032863, now seen corresponding path program 1 times [2024-06-28 02:01:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394735845] [2024-06-28 02:01:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:53,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:55,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394735845] [2024-06-28 02:01:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394735845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:55,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:55,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:55,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405130748] [2024-06-28 02:01:55,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:55,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:55,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:55,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 167 transitions, 1311 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:55,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:55,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:55,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:57,266 INFO L124 PetriNetUnfolderBase]: 5191/7910 cut-off events. [2024-06-28 02:01:57,266 INFO L125 PetriNetUnfolderBase]: For 94257/94257 co-relation queries the response was YES. [2024-06-28 02:01:57,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37220 conditions, 7910 events. 5191/7910 cut-off events. For 94257/94257 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 46567 event pairs, 1587 based on Foata normal form. 4/7912 useless extension candidates. Maximal degree in co-relation 37171. Up to 6767 conditions per place. [2024-06-28 02:01:57,313 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 232 selfloop transitions, 48 changer transitions 0/287 dead transitions. [2024-06-28 02:01:57,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 287 transitions, 2456 flow [2024-06-28 02:01:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:01:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:01:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-06-28 02:01:57,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-28 02:01:57,315 INFO L175 Difference]: Start difference. First operand has 114 places, 167 transitions, 1311 flow. Second operand 11 states and 288 transitions. [2024-06-28 02:01:57,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 287 transitions, 2456 flow [2024-06-28 02:01:57,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 287 transitions, 2438 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 02:01:57,395 INFO L231 Difference]: Finished difference. Result has 127 places, 191 transitions, 1666 flow [2024-06-28 02:01:57,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1666, PETRI_PLACES=127, PETRI_TRANSITIONS=191} [2024-06-28 02:01:57,396 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-06-28 02:01:57,396 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 191 transitions, 1666 flow [2024-06-28 02:01:57,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:57,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:57,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:57,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:01:57,397 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:57,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1782272191, now seen corresponding path program 2 times [2024-06-28 02:01:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:57,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103799979] [2024-06-28 02:01:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:57,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:59,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:59,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103799979] [2024-06-28 02:01:59,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103799979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:59,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:59,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:59,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109587169] [2024-06-28 02:01:59,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:59,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:59,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:59,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:59,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:01:59,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 191 transitions, 1666 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:59,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:59,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:01:59,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:02,156 INFO L124 PetriNetUnfolderBase]: 5509/8480 cut-off events. [2024-06-28 02:02:02,157 INFO L125 PetriNetUnfolderBase]: For 120821/120821 co-relation queries the response was YES. [2024-06-28 02:02:02,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42450 conditions, 8480 events. 5509/8480 cut-off events. For 120821/120821 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 50873 event pairs, 1205 based on Foata normal form. 4/8482 useless extension candidates. Maximal degree in co-relation 42395. Up to 6763 conditions per place. [2024-06-28 02:02:02,214 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 214 selfloop transitions, 51 changer transitions 0/272 dead transitions. [2024-06-28 02:02:02,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 272 transitions, 2682 flow [2024-06-28 02:02:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-28 02:02:02,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:02:02,217 INFO L175 Difference]: Start difference. First operand has 127 places, 191 transitions, 1666 flow. Second operand 9 states and 234 transitions. [2024-06-28 02:02:02,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 272 transitions, 2682 flow [2024-06-28 02:02:02,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 272 transitions, 2583 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 02:02:02,346 INFO L231 Difference]: Finished difference. Result has 132 places, 196 transitions, 1803 flow [2024-06-28 02:02:02,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1803, PETRI_PLACES=132, PETRI_TRANSITIONS=196} [2024-06-28 02:02:02,346 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 80 predicate places. [2024-06-28 02:02:02,346 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 196 transitions, 1803 flow [2024-06-28 02:02:02,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:02,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:02,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:02,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:02:02,347 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:02,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash -892551567, now seen corresponding path program 3 times [2024-06-28 02:02:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:02,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041296968] [2024-06-28 02:02:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:02,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:04,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:04,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041296968] [2024-06-28 02:02:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041296968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:04,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:04,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207997224] [2024-06-28 02:02:04,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:04,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:04,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:04,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:04,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 196 transitions, 1803 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:04,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:04,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:04,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:07,064 INFO L124 PetriNetUnfolderBase]: 5493/8454 cut-off events. [2024-06-28 02:02:07,064 INFO L125 PetriNetUnfolderBase]: For 127495/127495 co-relation queries the response was YES. [2024-06-28 02:02:07,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43000 conditions, 8454 events. 5493/8454 cut-off events. For 127495/127495 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 50617 event pairs, 1609 based on Foata normal form. 8/8460 useless extension candidates. Maximal degree in co-relation 42943. Up to 7627 conditions per place. [2024-06-28 02:02:07,153 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 223 selfloop transitions, 41 changer transitions 0/271 dead transitions. [2024-06-28 02:02:07,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 271 transitions, 2697 flow [2024-06-28 02:02:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-28 02:02:07,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-28 02:02:07,156 INFO L175 Difference]: Start difference. First operand has 132 places, 196 transitions, 1803 flow. Second operand 9 states and 226 transitions. [2024-06-28 02:02:07,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 271 transitions, 2697 flow [2024-06-28 02:02:07,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 271 transitions, 2570 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 02:02:07,338 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 1897 flow [2024-06-28 02:02:07,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1897, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2024-06-28 02:02:07,338 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 84 predicate places. [2024-06-28 02:02:07,338 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 1897 flow [2024-06-28 02:02:07,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:07,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:07,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:02:07,339 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:07,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash 198936545, now seen corresponding path program 4 times [2024-06-28 02:02:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:07,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261235392] [2024-06-28 02:02:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:07,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:10,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:10,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261235392] [2024-06-28 02:02:10,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261235392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:10,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:10,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:10,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837766751] [2024-06-28 02:02:10,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:10,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:10,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:10,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:10,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 1897 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:10,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:10,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:10,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:12,448 INFO L124 PetriNetUnfolderBase]: 5535/8516 cut-off events. [2024-06-28 02:02:12,448 INFO L125 PetriNetUnfolderBase]: For 122281/122281 co-relation queries the response was YES. [2024-06-28 02:02:12,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43111 conditions, 8516 events. 5535/8516 cut-off events. For 122281/122281 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 50916 event pairs, 1361 based on Foata normal form. 4/8515 useless extension candidates. Maximal degree in co-relation 43052. Up to 7140 conditions per place. [2024-06-28 02:02:12,525 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 163 selfloop transitions, 93 changer transitions 0/263 dead transitions. [2024-06-28 02:02:12,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 263 transitions, 2687 flow [2024-06-28 02:02:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 02:02:12,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-28 02:02:12,528 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 1897 flow. Second operand 8 states and 205 transitions. [2024-06-28 02:02:12,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 263 transitions, 2687 flow [2024-06-28 02:02:12,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 263 transitions, 2534 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-28 02:02:12,690 INFO L231 Difference]: Finished difference. Result has 137 places, 204 transitions, 2012 flow [2024-06-28 02:02:12,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2012, PETRI_PLACES=137, PETRI_TRANSITIONS=204} [2024-06-28 02:02:12,694 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 85 predicate places. [2024-06-28 02:02:12,695 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 204 transitions, 2012 flow [2024-06-28 02:02:12,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:12,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:12,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:12,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:02:12,696 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:12,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash -926230449, now seen corresponding path program 1 times [2024-06-28 02:02:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:12,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801187856] [2024-06-28 02:02:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:14,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801187856] [2024-06-28 02:02:14,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801187856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:14,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:14,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962951341] [2024-06-28 02:02:14,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:14,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:14,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:14,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:14,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 204 transitions, 2012 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:14,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:14,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:14,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:16,545 INFO L124 PetriNetUnfolderBase]: 5581/8575 cut-off events. [2024-06-28 02:02:16,545 INFO L125 PetriNetUnfolderBase]: For 131420/131420 co-relation queries the response was YES. [2024-06-28 02:02:16,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 8575 events. 5581/8575 cut-off events. For 131420/131420 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 51154 event pairs, 1504 based on Foata normal form. 2/8575 useless extension candidates. Maximal degree in co-relation 44130. Up to 7619 conditions per place. [2024-06-28 02:02:16,621 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 213 selfloop transitions, 31 changer transitions 0/251 dead transitions. [2024-06-28 02:02:16,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 251 transitions, 2816 flow [2024-06-28 02:02:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-28 02:02:16,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-06-28 02:02:16,622 INFO L175 Difference]: Start difference. First operand has 137 places, 204 transitions, 2012 flow. Second operand 6 states and 158 transitions. [2024-06-28 02:02:16,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 251 transitions, 2816 flow [2024-06-28 02:02:16,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 251 transitions, 2572 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:16,805 INFO L231 Difference]: Finished difference. Result has 137 places, 207 transitions, 1870 flow [2024-06-28 02:02:16,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1870, PETRI_PLACES=137, PETRI_TRANSITIONS=207} [2024-06-28 02:02:16,806 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 85 predicate places. [2024-06-28 02:02:16,806 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 207 transitions, 1870 flow [2024-06-28 02:02:16,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:16,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:16,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:16,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:02:16,807 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:16,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1641778597, now seen corresponding path program 5 times [2024-06-28 02:02:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:16,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412140756] [2024-06-28 02:02:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:16,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412140756] [2024-06-28 02:02:19,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412140756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:19,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:19,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946245580] [2024-06-28 02:02:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:19,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:19,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:19,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:19,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 207 transitions, 1870 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:19,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:19,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:19,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:21,797 INFO L124 PetriNetUnfolderBase]: 5573/8543 cut-off events. [2024-06-28 02:02:21,798 INFO L125 PetriNetUnfolderBase]: For 133433/133433 co-relation queries the response was YES. [2024-06-28 02:02:21,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43543 conditions, 8543 events. 5573/8543 cut-off events. For 133433/133433 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 50698 event pairs, 1517 based on Foata normal form. 4/8520 useless extension candidates. Maximal degree in co-relation 43482. Up to 7190 conditions per place. [2024-06-28 02:02:21,875 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 162 selfloop transitions, 100 changer transitions 0/269 dead transitions. [2024-06-28 02:02:21,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 269 transitions, 2712 flow [2024-06-28 02:02:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-28 02:02:21,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-06-28 02:02:21,892 INFO L175 Difference]: Start difference. First operand has 137 places, 207 transitions, 1870 flow. Second operand 9 states and 213 transitions. [2024-06-28 02:02:21,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 269 transitions, 2712 flow [2024-06-28 02:02:22,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 269 transitions, 2658 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 02:02:22,088 INFO L231 Difference]: Finished difference. Result has 143 places, 212 transitions, 2135 flow [2024-06-28 02:02:22,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2135, PETRI_PLACES=143, PETRI_TRANSITIONS=212} [2024-06-28 02:02:22,089 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 91 predicate places. [2024-06-28 02:02:22,089 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 212 transitions, 2135 flow [2024-06-28 02:02:22,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:22,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:22,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:22,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:02:22,090 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:22,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash -913850289, now seen corresponding path program 2 times [2024-06-28 02:02:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:22,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129037766] [2024-06-28 02:02:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:22,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:24,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:24,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129037766] [2024-06-28 02:02:24,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129037766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:24,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:24,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:24,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254986171] [2024-06-28 02:02:24,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:24,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:24,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:24,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:24,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:24,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:24,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 212 transitions, 2135 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:24,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:24,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:24,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:26,086 INFO L124 PetriNetUnfolderBase]: 5547/8438 cut-off events. [2024-06-28 02:02:26,086 INFO L125 PetriNetUnfolderBase]: For 143901/143901 co-relation queries the response was YES. [2024-06-28 02:02:26,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44200 conditions, 8438 events. 5547/8438 cut-off events. For 143901/143901 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 49913 event pairs, 1470 based on Foata normal form. 6/8431 useless extension candidates. Maximal degree in co-relation 44138. Up to 7588 conditions per place. [2024-06-28 02:02:26,166 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 208 selfloop transitions, 31 changer transitions 0/246 dead transitions. [2024-06-28 02:02:26,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 246 transitions, 2793 flow [2024-06-28 02:02:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:02:26,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-28 02:02:26,170 INFO L175 Difference]: Start difference. First operand has 143 places, 212 transitions, 2135 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:02:26,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 246 transitions, 2793 flow [2024-06-28 02:02:26,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 246 transitions, 2601 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 02:02:26,470 INFO L231 Difference]: Finished difference. Result has 144 places, 212 transitions, 2013 flow [2024-06-28 02:02:26,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2013, PETRI_PLACES=144, PETRI_TRANSITIONS=212} [2024-06-28 02:02:26,471 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 92 predicate places. [2024-06-28 02:02:26,471 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 212 transitions, 2013 flow [2024-06-28 02:02:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:26,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:26,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:26,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:02:26,472 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:26,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -319765717, now seen corresponding path program 1 times [2024-06-28 02:02:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374854926] [2024-06-28 02:02:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:28,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374854926] [2024-06-28 02:02:28,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374854926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:28,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41564100] [2024-06-28 02:02:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:28,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:28,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:28,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 212 transitions, 2013 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:28,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:28,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:28,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:30,447 INFO L124 PetriNetUnfolderBase]: 5570/8552 cut-off events. [2024-06-28 02:02:30,447 INFO L125 PetriNetUnfolderBase]: For 146355/146355 co-relation queries the response was YES. [2024-06-28 02:02:30,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44096 conditions, 8552 events. 5570/8552 cut-off events. For 146355/146355 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 50973 event pairs, 1757 based on Foata normal form. 1/8549 useless extension candidates. Maximal degree in co-relation 44032. Up to 7837 conditions per place. [2024-06-28 02:02:30,509 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 227 selfloop transitions, 24 changer transitions 0/258 dead transitions. [2024-06-28 02:02:30,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 258 transitions, 2979 flow [2024-06-28 02:02:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-28 02:02:30,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-06-28 02:02:30,512 INFO L175 Difference]: Start difference. First operand has 144 places, 212 transitions, 2013 flow. Second operand 6 states and 149 transitions. [2024-06-28 02:02:30,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 258 transitions, 2979 flow [2024-06-28 02:02:30,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 258 transitions, 2906 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 02:02:30,685 INFO L231 Difference]: Finished difference. Result has 147 places, 222 transitions, 2165 flow [2024-06-28 02:02:30,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2165, PETRI_PLACES=147, PETRI_TRANSITIONS=222} [2024-06-28 02:02:30,686 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-28 02:02:30,687 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 222 transitions, 2165 flow [2024-06-28 02:02:30,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:30,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:30,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:02:30,687 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash 30829265, now seen corresponding path program 2 times [2024-06-28 02:02:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:30,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249181215] [2024-06-28 02:02:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:32,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:32,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249181215] [2024-06-28 02:02:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249181215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:32,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:32,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:32,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874027291] [2024-06-28 02:02:32,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:32,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:32,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:32,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 222 transitions, 2165 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:32,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:32,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:32,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:34,418 INFO L124 PetriNetUnfolderBase]: 5624/8640 cut-off events. [2024-06-28 02:02:34,418 INFO L125 PetriNetUnfolderBase]: For 156952/156952 co-relation queries the response was YES. [2024-06-28 02:02:34,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45864 conditions, 8640 events. 5624/8640 cut-off events. For 156952/156952 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 51676 event pairs, 1823 based on Foata normal form. 1/8639 useless extension candidates. Maximal degree in co-relation 45797. Up to 8023 conditions per place. [2024-06-28 02:02:34,613 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 238 selfloop transitions, 19 changer transitions 0/264 dead transitions. [2024-06-28 02:02:34,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 264 transitions, 3006 flow [2024-06-28 02:02:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:02:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:02:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 02:02:34,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 02:02:34,615 INFO L175 Difference]: Start difference. First operand has 147 places, 222 transitions, 2165 flow. Second operand 7 states and 162 transitions. [2024-06-28 02:02:34,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 264 transitions, 3006 flow [2024-06-28 02:02:34,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 264 transitions, 2928 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-28 02:02:34,817 INFO L231 Difference]: Finished difference. Result has 154 places, 230 transitions, 2292 flow [2024-06-28 02:02:34,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2292, PETRI_PLACES=154, PETRI_TRANSITIONS=230} [2024-06-28 02:02:34,818 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2024-06-28 02:02:34,818 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 230 transitions, 2292 flow [2024-06-28 02:02:34,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:34,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:34,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:34,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:02:34,819 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:34,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1482762619, now seen corresponding path program 1 times [2024-06-28 02:02:34,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:34,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409181264] [2024-06-28 02:02:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:34,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:37,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:37,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409181264] [2024-06-28 02:02:37,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409181264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:37,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:37,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241674912] [2024-06-28 02:02:37,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:37,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:37,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:37,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:37,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:37,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 230 transitions, 2292 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:37,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:37,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:37,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:40,116 INFO L124 PetriNetUnfolderBase]: 5920/9100 cut-off events. [2024-06-28 02:02:40,116 INFO L125 PetriNetUnfolderBase]: For 188261/188261 co-relation queries the response was YES. [2024-06-28 02:02:40,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48507 conditions, 9100 events. 5920/9100 cut-off events. For 188261/188261 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 54787 event pairs, 1370 based on Foata normal form. 32/9130 useless extension candidates. Maximal degree in co-relation 48436. Up to 7051 conditions per place. [2024-06-28 02:02:40,193 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 245 selfloop transitions, 59 changer transitions 0/311 dead transitions. [2024-06-28 02:02:40,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 311 transitions, 3376 flow [2024-06-28 02:02:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-28 02:02:40,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-06-28 02:02:40,195 INFO L175 Difference]: Start difference. First operand has 154 places, 230 transitions, 2292 flow. Second operand 9 states and 236 transitions. [2024-06-28 02:02:40,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 311 transitions, 3376 flow [2024-06-28 02:02:40,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 311 transitions, 3294 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 02:02:40,445 INFO L231 Difference]: Finished difference. Result has 159 places, 234 transitions, 2437 flow [2024-06-28 02:02:40,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2437, PETRI_PLACES=159, PETRI_TRANSITIONS=234} [2024-06-28 02:02:40,445 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-28 02:02:40,446 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 234 transitions, 2437 flow [2024-06-28 02:02:40,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:40,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:40,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:40,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:02:40,446 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:40,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1753310045, now seen corresponding path program 2 times [2024-06-28 02:02:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083593603] [2024-06-28 02:02:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:43,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:43,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083593603] [2024-06-28 02:02:43,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083593603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:43,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:43,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:43,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064501376] [2024-06-28 02:02:43,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:43,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:43,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:43,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:43,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 234 transitions, 2437 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:43,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:43,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:43,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:45,770 INFO L124 PetriNetUnfolderBase]: 5848/8983 cut-off events. [2024-06-28 02:02:45,770 INFO L125 PetriNetUnfolderBase]: For 181599/181599 co-relation queries the response was YES. [2024-06-28 02:02:45,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47604 conditions, 8983 events. 5848/8983 cut-off events. For 181599/181599 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 53907 event pairs, 1776 based on Foata normal form. 40/9021 useless extension candidates. Maximal degree in co-relation 47532. Up to 7727 conditions per place. [2024-06-28 02:02:45,846 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 259 selfloop transitions, 41 changer transitions 0/307 dead transitions. [2024-06-28 02:02:45,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 307 transitions, 3297 flow [2024-06-28 02:02:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-28 02:02:45,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-28 02:02:45,848 INFO L175 Difference]: Start difference. First operand has 159 places, 234 transitions, 2437 flow. Second operand 9 states and 229 transitions. [2024-06-28 02:02:45,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 307 transitions, 3297 flow [2024-06-28 02:02:46,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 307 transitions, 3074 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:46,228 INFO L231 Difference]: Finished difference. Result has 162 places, 234 transitions, 2308 flow [2024-06-28 02:02:46,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2308, PETRI_PLACES=162, PETRI_TRANSITIONS=234} [2024-06-28 02:02:46,228 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 110 predicate places. [2024-06-28 02:02:46,229 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 234 transitions, 2308 flow [2024-06-28 02:02:46,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:46,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:46,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:46,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:02:46,229 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:46,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:46,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2071516667, now seen corresponding path program 3 times [2024-06-28 02:02:46,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:46,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862449811] [2024-06-28 02:02:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:46,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:48,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:48,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862449811] [2024-06-28 02:02:48,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862449811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:48,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:48,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499504625] [2024-06-28 02:02:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:48,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:48,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 234 transitions, 2308 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:48,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:48,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:48,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:51,151 INFO L124 PetriNetUnfolderBase]: 6038/9312 cut-off events. [2024-06-28 02:02:51,152 INFO L125 PetriNetUnfolderBase]: For 175829/175833 co-relation queries the response was YES. [2024-06-28 02:02:51,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47942 conditions, 9312 events. 6038/9312 cut-off events. For 175829/175833 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 56338 event pairs, 1350 based on Foata normal form. 24/9331 useless extension candidates. Maximal degree in co-relation 47869. Up to 7680 conditions per place. [2024-06-28 02:02:51,225 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 199 selfloop transitions, 94 changer transitions 0/300 dead transitions. [2024-06-28 02:02:51,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 300 transitions, 3184 flow [2024-06-28 02:02:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 02:02:51,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-28 02:02:51,227 INFO L175 Difference]: Start difference. First operand has 162 places, 234 transitions, 2308 flow. Second operand 8 states and 210 transitions. [2024-06-28 02:02:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 300 transitions, 3184 flow [2024-06-28 02:02:51,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 300 transitions, 3037 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 02:02:51,473 INFO L231 Difference]: Finished difference. Result has 161 places, 236 transitions, 2425 flow [2024-06-28 02:02:51,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2425, PETRI_PLACES=161, PETRI_TRANSITIONS=236} [2024-06-28 02:02:51,473 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 109 predicate places. [2024-06-28 02:02:51,473 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 236 transitions, 2425 flow [2024-06-28 02:02:51,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:51,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:51,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:51,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:02:51,474 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:51,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1872214877, now seen corresponding path program 4 times [2024-06-28 02:02:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:51,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618502733] [2024-06-28 02:02:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:54,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618502733] [2024-06-28 02:02:54,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618502733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:54,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:54,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:02:54,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374571570] [2024-06-28 02:02:54,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:54,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:02:54,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:02:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:02:54,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:02:54,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 236 transitions, 2425 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:54,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:54,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:02:54,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:57,444 INFO L124 PetriNetUnfolderBase]: 6228/9602 cut-off events. [2024-06-28 02:02:57,444 INFO L125 PetriNetUnfolderBase]: For 194347/194347 co-relation queries the response was YES. [2024-06-28 02:02:57,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50254 conditions, 9602 events. 6228/9602 cut-off events. For 194347/194347 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 58390 event pairs, 1420 based on Foata normal form. 20/9617 useless extension candidates. Maximal degree in co-relation 50180. Up to 7970 conditions per place. [2024-06-28 02:02:57,519 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 210 selfloop transitions, 93 changer transitions 0/310 dead transitions. [2024-06-28 02:02:57,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 310 transitions, 3355 flow [2024-06-28 02:02:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-28 02:02:57,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393518518518519 [2024-06-28 02:02:57,521 INFO L175 Difference]: Start difference. First operand has 161 places, 236 transitions, 2425 flow. Second operand 9 states and 233 transitions. [2024-06-28 02:02:57,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 310 transitions, 3355 flow [2024-06-28 02:02:57,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 310 transitions, 3119 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:57,785 INFO L231 Difference]: Finished difference. Result has 164 places, 238 transitions, 2455 flow [2024-06-28 02:02:57,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2455, PETRI_PLACES=164, PETRI_TRANSITIONS=238} [2024-06-28 02:02:57,786 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 112 predicate places. [2024-06-28 02:02:57,786 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 238 transitions, 2455 flow [2024-06-28 02:02:57,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:57,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:57,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:57,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:02:57,787 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:57,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1032221149, now seen corresponding path program 5 times [2024-06-28 02:02:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:57,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479319859] [2024-06-28 02:02:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:57,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:00,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:00,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479319859] [2024-06-28 02:03:00,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479319859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:00,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:00,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:03:00,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474910388] [2024-06-28 02:03:00,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:00,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:03:00,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:00,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:03:00,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:03:00,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:00,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 238 transitions, 2455 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:00,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:00,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:00,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:04,074 INFO L124 PetriNetUnfolderBase]: 6376/9830 cut-off events. [2024-06-28 02:03:04,074 INFO L125 PetriNetUnfolderBase]: For 203718/203718 co-relation queries the response was YES. [2024-06-28 02:03:04,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51383 conditions, 9830 events. 6376/9830 cut-off events. For 203718/203718 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 59999 event pairs, 1396 based on Foata normal form. 16/9841 useless extension candidates. Maximal degree in co-relation 51308. Up to 7968 conditions per place. [2024-06-28 02:03:04,162 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 220 selfloop transitions, 98 changer transitions 0/325 dead transitions. [2024-06-28 02:03:04,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 325 transitions, 3463 flow [2024-06-28 02:03:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:03:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:03:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-28 02:03:04,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:03:04,164 INFO L175 Difference]: Start difference. First operand has 164 places, 238 transitions, 2455 flow. Second operand 10 states and 260 transitions. [2024-06-28 02:03:04,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 325 transitions, 3463 flow [2024-06-28 02:03:04,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 325 transitions, 3225 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 02:03:04,456 INFO L231 Difference]: Finished difference. Result has 167 places, 240 transitions, 2496 flow [2024-06-28 02:03:04,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2496, PETRI_PLACES=167, PETRI_TRANSITIONS=240} [2024-06-28 02:03:04,457 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2024-06-28 02:03:04,457 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 240 transitions, 2496 flow [2024-06-28 02:03:04,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:04,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:04,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:04,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:03:04,457 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:04,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1877792459, now seen corresponding path program 1 times [2024-06-28 02:03:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486050119] [2024-06-28 02:03:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:07,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:07,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486050119] [2024-06-28 02:03:07,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486050119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:07,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:07,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:03:07,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153644636] [2024-06-28 02:03:07,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:07,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:03:07,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:03:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:03:07,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:07,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 240 transitions, 2496 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:07,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:07,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:07,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:10,461 INFO L124 PetriNetUnfolderBase]: 6708/10342 cut-off events. [2024-06-28 02:03:10,462 INFO L125 PetriNetUnfolderBase]: For 234593/234597 co-relation queries the response was YES. [2024-06-28 02:03:10,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55218 conditions, 10342 events. 6708/10342 cut-off events. For 234593/234597 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 63842 event pairs, 1458 based on Foata normal form. 16/10353 useless extension candidates. Maximal degree in co-relation 55142. Up to 7464 conditions per place. [2024-06-28 02:03:10,553 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 201 selfloop transitions, 104 changer transitions 0/312 dead transitions. [2024-06-28 02:03:10,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 312 transitions, 3630 flow [2024-06-28 02:03:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-28 02:03:10,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-28 02:03:10,555 INFO L175 Difference]: Start difference. First operand has 167 places, 240 transitions, 2496 flow. Second operand 8 states and 213 transitions. [2024-06-28 02:03:10,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 312 transitions, 3630 flow [2024-06-28 02:03:10,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 312 transitions, 3369 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-28 02:03:10,918 INFO L231 Difference]: Finished difference. Result has 167 places, 244 transitions, 2606 flow [2024-06-28 02:03:10,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2606, PETRI_PLACES=167, PETRI_TRANSITIONS=244} [2024-06-28 02:03:10,919 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2024-06-28 02:03:10,919 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 244 transitions, 2606 flow [2024-06-28 02:03:10,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:10,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:10,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:10,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:03:10,920 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:10,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1839847039, now seen corresponding path program 6 times [2024-06-28 02:03:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:10,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216765427] [2024-06-28 02:03:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:10,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:13,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:13,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216765427] [2024-06-28 02:03:13,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216765427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:13,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:13,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:03:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524566198] [2024-06-28 02:03:13,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:13,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:03:13,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:03:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:03:13,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:13,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 244 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:13,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:13,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:13,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:16,907 INFO L124 PetriNetUnfolderBase]: 6672/10237 cut-off events. [2024-06-28 02:03:16,908 INFO L125 PetriNetUnfolderBase]: For 232258/232258 co-relation queries the response was YES. [2024-06-28 02:03:16,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53992 conditions, 10237 events. 6672/10237 cut-off events. For 232258/232258 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 62605 event pairs, 1634 based on Foata normal form. 20/10230 useless extension candidates. Maximal degree in co-relation 53915. Up to 8654 conditions per place. [2024-06-28 02:03:16,992 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 210 selfloop transitions, 96 changer transitions 0/313 dead transitions. [2024-06-28 02:03:16,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 313 transitions, 3468 flow [2024-06-28 02:03:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:03:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:03:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-28 02:03:17,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-28 02:03:17,003 INFO L175 Difference]: Start difference. First operand has 167 places, 244 transitions, 2606 flow. Second operand 9 states and 227 transitions. [2024-06-28 02:03:17,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 313 transitions, 3468 flow [2024-06-28 02:03:17,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 313 transitions, 3256 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-28 02:03:17,473 INFO L231 Difference]: Finished difference. Result has 172 places, 244 transitions, 2594 flow [2024-06-28 02:03:17,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2594, PETRI_PLACES=172, PETRI_TRANSITIONS=244} [2024-06-28 02:03:17,474 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-28 02:03:17,474 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 244 transitions, 2594 flow [2024-06-28 02:03:17,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:17,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:17,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:17,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:03:17,474 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:17,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash 644472453, now seen corresponding path program 7 times [2024-06-28 02:03:17,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:17,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222308443] [2024-06-28 02:03:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:17,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:20,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:20,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222308443] [2024-06-28 02:03:20,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222308443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:20,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:20,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:03:20,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818776550] [2024-06-28 02:03:20,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:03:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:03:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:03:20,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:20,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 244 transitions, 2594 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:20,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:20,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:20,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:23,377 INFO L124 PetriNetUnfolderBase]: 6820/10454 cut-off events. [2024-06-28 02:03:23,377 INFO L125 PetriNetUnfolderBase]: For 229635/229635 co-relation queries the response was YES. [2024-06-28 02:03:23,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55009 conditions, 10454 events. 6820/10454 cut-off events. For 229635/229635 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 64013 event pairs, 1610 based on Foata normal form. 16/10443 useless extension candidates. Maximal degree in co-relation 54930. Up to 8652 conditions per place. [2024-06-28 02:03:23,498 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 220 selfloop transitions, 101 changer transitions 0/328 dead transitions. [2024-06-28 02:03:23,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 328 transitions, 3610 flow [2024-06-28 02:03:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:03:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:03:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-28 02:03:23,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-28 02:03:23,509 INFO L175 Difference]: Start difference. First operand has 172 places, 244 transitions, 2594 flow. Second operand 10 states and 254 transitions. [2024-06-28 02:03:23,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 328 transitions, 3610 flow [2024-06-28 02:03:23,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 328 transitions, 3380 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 02:03:23,871 INFO L231 Difference]: Finished difference. Result has 174 places, 246 transitions, 2657 flow [2024-06-28 02:03:23,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2657, PETRI_PLACES=174, PETRI_TRANSITIONS=246} [2024-06-28 02:03:23,872 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-28 02:03:23,872 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 246 transitions, 2657 flow [2024-06-28 02:03:23,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:23,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:23,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:23,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:03:23,872 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:23,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:23,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1497807737, now seen corresponding path program 8 times [2024-06-28 02:03:23,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839989586] [2024-06-28 02:03:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:23,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:26,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:26,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839989586] [2024-06-28 02:03:26,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839989586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:26,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:26,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:03:26,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219108284] [2024-06-28 02:03:26,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:26,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:03:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:26,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:03:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:03:26,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:26,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 246 transitions, 2657 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:26,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:26,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:26,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:29,454 INFO L124 PetriNetUnfolderBase]: 6910/10643 cut-off events. [2024-06-28 02:03:29,454 INFO L125 PetriNetUnfolderBase]: For 245542/245554 co-relation queries the response was YES. [2024-06-28 02:03:29,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56081 conditions, 10643 events. 6910/10643 cut-off events. For 245542/245554 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 65960 event pairs, 1570 based on Foata normal form. 28/10651 useless extension candidates. Maximal degree in co-relation 56001. Up to 9024 conditions per place. [2024-06-28 02:03:29,552 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 210 selfloop transitions, 92 changer transitions 0/309 dead transitions. [2024-06-28 02:03:29,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 309 transitions, 3565 flow [2024-06-28 02:03:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:03:29,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 02:03:29,555 INFO L175 Difference]: Start difference. First operand has 174 places, 246 transitions, 2657 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:03:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 309 transitions, 3565 flow [2024-06-28 02:03:29,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 309 transitions, 3290 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-28 02:03:29,968 INFO L231 Difference]: Finished difference. Result has 174 places, 248 transitions, 2662 flow [2024-06-28 02:03:29,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2662, PETRI_PLACES=174, PETRI_TRANSITIONS=248} [2024-06-28 02:03:29,968 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-28 02:03:29,969 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 248 transitions, 2662 flow [2024-06-28 02:03:29,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:29,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:29,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:29,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:03:29,969 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:29,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash 300284171, now seen corresponding path program 2 times [2024-06-28 02:03:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035711267] [2024-06-28 02:03:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:33,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035711267] [2024-06-28 02:03:33,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035711267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:33,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:33,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:03:33,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501332867] [2024-06-28 02:03:33,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:33,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:03:33,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:03:33,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:03:33,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:33,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 248 transitions, 2662 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:33,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:33,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:33,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:36,084 INFO L124 PetriNetUnfolderBase]: 7016/10829 cut-off events. [2024-06-28 02:03:36,084 INFO L125 PetriNetUnfolderBase]: For 250135/250147 co-relation queries the response was YES. [2024-06-28 02:03:36,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56748 conditions, 10829 events. 7016/10829 cut-off events. For 250135/250147 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 67525 event pairs, 1570 based on Foata normal form. 20/10829 useless extension candidates. Maximal degree in co-relation 56667. Up to 9000 conditions per place. [2024-06-28 02:03:36,182 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 212 selfloop transitions, 95 changer transitions 0/314 dead transitions. [2024-06-28 02:03:36,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 314 transitions, 3602 flow [2024-06-28 02:03:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:03:36,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-28 02:03:36,185 INFO L175 Difference]: Start difference. First operand has 174 places, 248 transitions, 2662 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:03:36,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 314 transitions, 3602 flow [2024-06-28 02:03:36,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 314 transitions, 3350 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 02:03:36,650 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 2699 flow [2024-06-28 02:03:36,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2699, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-28 02:03:36,651 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 124 predicate places. [2024-06-28 02:03:36,651 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 2699 flow [2024-06-28 02:03:36,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:36,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:36,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:03:36,652 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:36,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash -27625971, now seen corresponding path program 3 times [2024-06-28 02:03:36,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:36,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018446946] [2024-06-28 02:03:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:39,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:39,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018446946] [2024-06-28 02:03:39,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018446946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:39,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:39,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:03:39,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385956190] [2024-06-28 02:03:39,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:39,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:03:39,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:03:39,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:03:39,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:39,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 2699 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:39,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:39,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:39,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:42,589 INFO L124 PetriNetUnfolderBase]: 6996/10777 cut-off events. [2024-06-28 02:03:42,589 INFO L125 PetriNetUnfolderBase]: For 239634/239646 co-relation queries the response was YES. [2024-06-28 02:03:42,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55327 conditions, 10777 events. 6996/10777 cut-off events. For 239634/239646 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 66813 event pairs, 1433 based on Foata normal form. 20/10777 useless extension candidates. Maximal degree in co-relation 55245. Up to 7288 conditions per place. [2024-06-28 02:03:42,684 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 191 selfloop transitions, 115 changer transitions 0/313 dead transitions. [2024-06-28 02:03:42,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 313 transitions, 3557 flow [2024-06-28 02:03:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:03:42,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 02:03:42,686 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 2699 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:03:42,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 313 transitions, 3557 flow [2024-06-28 02:03:43,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 313 transitions, 3294 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 02:03:43,092 INFO L231 Difference]: Finished difference. Result has 177 places, 251 transitions, 2695 flow [2024-06-28 02:03:43,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2695, PETRI_PLACES=177, PETRI_TRANSITIONS=251} [2024-06-28 02:03:43,093 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2024-06-28 02:03:43,093 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 251 transitions, 2695 flow [2024-06-28 02:03:43,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:43,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:43,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:03:43,094 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:43,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -920565805, now seen corresponding path program 1 times [2024-06-28 02:03:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:43,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046526377] [2024-06-28 02:03:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:45,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:45,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046526377] [2024-06-28 02:03:45,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046526377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:45,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:45,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:03:45,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689727689] [2024-06-28 02:03:45,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:45,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:03:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:45,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:03:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:03:45,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:45,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 251 transitions, 2695 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:45,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:45,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:45,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:47,540 INFO L124 PetriNetUnfolderBase]: 7042/10871 cut-off events. [2024-06-28 02:03:47,540 INFO L125 PetriNetUnfolderBase]: For 237528/237531 co-relation queries the response was YES. [2024-06-28 02:03:47,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55866 conditions, 10871 events. 7042/10871 cut-off events. For 237528/237531 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 68014 event pairs, 2084 based on Foata normal form. 4/10872 useless extension candidates. Maximal degree in co-relation 55783. Up to 10036 conditions per place. [2024-06-28 02:03:47,652 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 253 selfloop transitions, 30 changer transitions 0/290 dead transitions. [2024-06-28 02:03:47,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 290 transitions, 3674 flow [2024-06-28 02:03:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:03:47,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-28 02:03:47,653 INFO L175 Difference]: Start difference. First operand has 177 places, 251 transitions, 2695 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:03:47,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 290 transitions, 3674 flow [2024-06-28 02:03:48,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 290 transitions, 3367 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 02:03:48,141 INFO L231 Difference]: Finished difference. Result has 178 places, 255 transitions, 2556 flow [2024-06-28 02:03:48,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2556, PETRI_PLACES=178, PETRI_TRANSITIONS=255} [2024-06-28 02:03:48,142 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 126 predicate places. [2024-06-28 02:03:48,142 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 255 transitions, 2556 flow [2024-06-28 02:03:48,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:48,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:48,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:48,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:03:48,142 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:48,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash -889972339, now seen corresponding path program 1 times [2024-06-28 02:03:48,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:48,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89366387] [2024-06-28 02:03:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:48,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:50,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:50,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89366387] [2024-06-28 02:03:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89366387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:50,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:50,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:50,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114894242] [2024-06-28 02:03:50,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:50,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:50,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:50,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 255 transitions, 2556 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:50,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:50,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:50,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:53,211 INFO L124 PetriNetUnfolderBase]: 7216/11100 cut-off events. [2024-06-28 02:03:53,211 INFO L125 PetriNetUnfolderBase]: For 242898/242898 co-relation queries the response was YES. [2024-06-28 02:03:53,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56189 conditions, 11100 events. 7216/11100 cut-off events. For 242898/242898 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 68979 event pairs, 2203 based on Foata normal form. 4/11087 useless extension candidates. Maximal degree in co-relation 56104. Up to 9004 conditions per place. [2024-06-28 02:03:53,319 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 264 selfloop transitions, 62 changer transitions 0/333 dead transitions. [2024-06-28 02:03:53,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 333 transitions, 4195 flow [2024-06-28 02:03:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:03:53,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-28 02:03:53,321 INFO L175 Difference]: Start difference. First operand has 178 places, 255 transitions, 2556 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:03:53,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 333 transitions, 4195 flow [2024-06-28 02:03:53,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 333 transitions, 4113 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 02:03:53,753 INFO L231 Difference]: Finished difference. Result has 184 places, 276 transitions, 2980 flow [2024-06-28 02:03:53,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2980, PETRI_PLACES=184, PETRI_TRANSITIONS=276} [2024-06-28 02:03:53,753 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-06-28 02:03:53,753 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 276 transitions, 2980 flow [2024-06-28 02:03:53,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:53,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:53,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:53,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:03:53,754 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:53,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash -215435411, now seen corresponding path program 2 times [2024-06-28 02:03:53,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:53,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196199079] [2024-06-28 02:03:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:56,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:56,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196199079] [2024-06-28 02:03:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196199079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:56,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:56,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117605849] [2024-06-28 02:03:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:56,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:56,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:03:56,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 276 transitions, 2980 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:56,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:56,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:03:56,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:58,818 INFO L124 PetriNetUnfolderBase]: 7220/11048 cut-off events. [2024-06-28 02:03:58,818 INFO L125 PetriNetUnfolderBase]: For 254254/254254 co-relation queries the response was YES. [2024-06-28 02:03:58,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59141 conditions, 11048 events. 7220/11048 cut-off events. For 254254/254254 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 68707 event pairs, 2131 based on Foata normal form. 2/11046 useless extension candidates. Maximal degree in co-relation 59053. Up to 10276 conditions per place. [2024-06-28 02:03:58,909 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 276 selfloop transitions, 37 changer transitions 0/320 dead transitions. [2024-06-28 02:03:58,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 320 transitions, 3995 flow [2024-06-28 02:03:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 02:03:58,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-28 02:03:58,910 INFO L175 Difference]: Start difference. First operand has 184 places, 276 transitions, 2980 flow. Second operand 7 states and 169 transitions. [2024-06-28 02:03:58,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 320 transitions, 3995 flow [2024-06-28 02:03:59,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 320 transitions, 3953 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-28 02:03:59,388 INFO L231 Difference]: Finished difference. Result has 190 places, 280 transitions, 3108 flow [2024-06-28 02:03:59,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3108, PETRI_PLACES=190, PETRI_TRANSITIONS=280} [2024-06-28 02:03:59,389 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 138 predicate places. [2024-06-28 02:03:59,389 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 280 transitions, 3108 flow [2024-06-28 02:03:59,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:59,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:59,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:59,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:03:59,390 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:59,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash 955709679, now seen corresponding path program 2 times [2024-06-28 02:03:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:59,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029771688] [2024-06-28 02:03:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029771688] [2024-06-28 02:04:01,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029771688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:01,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:01,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286652392] [2024-06-28 02:04:01,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:01,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:01,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:01,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:01,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:01,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 280 transitions, 3108 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:01,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:01,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:01,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:04,354 INFO L124 PetriNetUnfolderBase]: 7885/12013 cut-off events. [2024-06-28 02:04:04,355 INFO L125 PetriNetUnfolderBase]: For 295845/295845 co-relation queries the response was YES. [2024-06-28 02:04:04,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65275 conditions, 12013 events. 7885/12013 cut-off events. For 295845/295845 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 74505 event pairs, 1865 based on Foata normal form. 6/12006 useless extension candidates. Maximal degree in co-relation 65184. Up to 10165 conditions per place. [2024-06-28 02:04:04,501 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 286 selfloop transitions, 62 changer transitions 0/355 dead transitions. [2024-06-28 02:04:04,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 355 transitions, 4639 flow [2024-06-28 02:04:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:04:04,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 02:04:04,503 INFO L175 Difference]: Start difference. First operand has 190 places, 280 transitions, 3108 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:04:04,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 355 transitions, 4639 flow [2024-06-28 02:04:05,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 355 transitions, 4529 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 02:04:05,139 INFO L231 Difference]: Finished difference. Result has 196 places, 304 transitions, 3642 flow [2024-06-28 02:04:05,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3642, PETRI_PLACES=196, PETRI_TRANSITIONS=304} [2024-06-28 02:04:05,139 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-28 02:04:05,139 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 304 transitions, 3642 flow [2024-06-28 02:04:05,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:05,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:05,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:04:05,140 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:05,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash 13718073, now seen corresponding path program 3 times [2024-06-28 02:04:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:05,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713085821] [2024-06-28 02:04:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:07,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713085821] [2024-06-28 02:04:07,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713085821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:07,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:07,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:04:07,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146258189] [2024-06-28 02:04:07,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:07,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:04:07,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:04:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:04:07,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:07,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 304 transitions, 3642 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:07,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:07,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:07,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:09,766 INFO L124 PetriNetUnfolderBase]: 7879/12099 cut-off events. [2024-06-28 02:04:09,767 INFO L125 PetriNetUnfolderBase]: For 313704/313704 co-relation queries the response was YES. [2024-06-28 02:04:09,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68510 conditions, 12099 events. 7879/12099 cut-off events. For 313704/313704 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 76274 event pairs, 2308 based on Foata normal form. 2/12099 useless extension candidates. Maximal degree in co-relation 68415. Up to 11331 conditions per place. [2024-06-28 02:04:09,912 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 311 selfloop transitions, 19 changer transitions 0/337 dead transitions. [2024-06-28 02:04:09,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 337 transitions, 4452 flow [2024-06-28 02:04:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 02:04:09,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 02:04:09,914 INFO L175 Difference]: Start difference. First operand has 196 places, 304 transitions, 3642 flow. Second operand 7 states and 160 transitions. [2024-06-28 02:04:09,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 337 transitions, 4452 flow [2024-06-28 02:04:10,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 337 transitions, 4111 flow, removed 160 selfloop flow, removed 2 redundant places. [2024-06-28 02:04:10,780 INFO L231 Difference]: Finished difference. Result has 201 places, 304 transitions, 3380 flow [2024-06-28 02:04:10,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3380, PETRI_PLACES=201, PETRI_TRANSITIONS=304} [2024-06-28 02:04:10,781 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 149 predicate places. [2024-06-28 02:04:10,781 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 304 transitions, 3380 flow [2024-06-28 02:04:10,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:10,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:10,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:10,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:04:10,782 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:10,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash 13955409, now seen corresponding path program 3 times [2024-06-28 02:04:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:10,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925218894] [2024-06-28 02:04:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:10,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:13,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:13,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925218894] [2024-06-28 02:04:13,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925218894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:13,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:13,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:13,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119787349] [2024-06-28 02:04:13,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:13,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:13,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:13,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:13,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:13,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 304 transitions, 3380 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:13,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:13,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:13,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:16,386 INFO L124 PetriNetUnfolderBase]: 8173/12401 cut-off events. [2024-06-28 02:04:16,386 INFO L125 PetriNetUnfolderBase]: For 317935/317935 co-relation queries the response was YES. [2024-06-28 02:04:16,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69179 conditions, 12401 events. 8173/12401 cut-off events. For 317935/317935 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 76624 event pairs, 1845 based on Foata normal form. 6/12394 useless extension candidates. Maximal degree in co-relation 69082. Up to 10367 conditions per place. [2024-06-28 02:04:16,511 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 293 selfloop transitions, 79 changer transitions 0/379 dead transitions. [2024-06-28 02:04:16,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 379 transitions, 4824 flow [2024-06-28 02:04:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:04:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:04:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-28 02:04:16,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-28 02:04:16,512 INFO L175 Difference]: Start difference. First operand has 201 places, 304 transitions, 3380 flow. Second operand 9 states and 226 transitions. [2024-06-28 02:04:16,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 379 transitions, 4824 flow [2024-06-28 02:04:17,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 379 transitions, 4762 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 02:04:17,155 INFO L231 Difference]: Finished difference. Result has 205 places, 321 transitions, 3810 flow [2024-06-28 02:04:17,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3810, PETRI_PLACES=205, PETRI_TRANSITIONS=321} [2024-06-28 02:04:17,155 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 153 predicate places. [2024-06-28 02:04:17,156 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 321 transitions, 3810 flow [2024-06-28 02:04:17,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:17,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:17,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:17,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:04:17,156 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:17,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:17,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1735875919, now seen corresponding path program 1 times [2024-06-28 02:04:17,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:17,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081316821] [2024-06-28 02:04:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:17,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:20,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:20,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081316821] [2024-06-28 02:04:20,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081316821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:20,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:20,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42278634] [2024-06-28 02:04:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:20,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:20,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 321 transitions, 3810 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:20,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:20,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:20,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:23,550 INFO L124 PetriNetUnfolderBase]: 8380/12780 cut-off events. [2024-06-28 02:04:23,551 INFO L125 PetriNetUnfolderBase]: For 346256/346256 co-relation queries the response was YES. [2024-06-28 02:04:23,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72901 conditions, 12780 events. 8380/12780 cut-off events. For 346256/346256 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 79999 event pairs, 1891 based on Foata normal form. 14/12781 useless extension candidates. Maximal degree in co-relation 72802. Up to 11420 conditions per place. [2024-06-28 02:04:23,684 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 322 selfloop transitions, 40 changer transitions 0/369 dead transitions. [2024-06-28 02:04:23,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 369 transitions, 4829 flow [2024-06-28 02:04:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:04:23,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-28 02:04:23,685 INFO L175 Difference]: Start difference. First operand has 205 places, 321 transitions, 3810 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:04:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 369 transitions, 4829 flow [2024-06-28 02:04:24,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 369 transitions, 4653 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-28 02:04:24,529 INFO L231 Difference]: Finished difference. Result has 208 places, 323 transitions, 3757 flow [2024-06-28 02:04:24,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3757, PETRI_PLACES=208, PETRI_TRANSITIONS=323} [2024-06-28 02:04:24,530 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 156 predicate places. [2024-06-28 02:04:24,530 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 323 transitions, 3757 flow [2024-06-28 02:04:24,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:24,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:24,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:24,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:04:24,531 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:24,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1064178602, now seen corresponding path program 1 times [2024-06-28 02:04:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716613982] [2024-06-28 02:04:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:24,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:26,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:26,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716613982] [2024-06-28 02:04:26,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716613982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:26,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:26,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215219755] [2024-06-28 02:04:26,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:26,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:26,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:26,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:26,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 323 transitions, 3757 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:26,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:26,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:26,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:30,204 INFO L124 PetriNetUnfolderBase]: 8615/13202 cut-off events. [2024-06-28 02:04:30,204 INFO L125 PetriNetUnfolderBase]: For 354648/354648 co-relation queries the response was YES. [2024-06-28 02:04:30,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75842 conditions, 13202 events. 8615/13202 cut-off events. For 354648/354648 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 83786 event pairs, 2328 based on Foata normal form. 1/13198 useless extension candidates. Maximal degree in co-relation 75741. Up to 10297 conditions per place. [2024-06-28 02:04:30,354 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 310 selfloop transitions, 95 changer transitions 0/412 dead transitions. [2024-06-28 02:04:30,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 412 transitions, 5892 flow [2024-06-28 02:04:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-28 02:04:30,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-28 02:04:30,355 INFO L175 Difference]: Start difference. First operand has 208 places, 323 transitions, 3757 flow. Second operand 7 states and 190 transitions. [2024-06-28 02:04:30,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 412 transitions, 5892 flow [2024-06-28 02:04:31,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 412 transitions, 5797 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:31,200 INFO L231 Difference]: Finished difference. Result has 213 places, 346 transitions, 4385 flow [2024-06-28 02:04:31,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3668, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4385, PETRI_PLACES=213, PETRI_TRANSITIONS=346} [2024-06-28 02:04:31,201 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 161 predicate places. [2024-06-28 02:04:31,201 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 346 transitions, 4385 flow [2024-06-28 02:04:31,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:31,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:31,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:31,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:04:31,202 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:31,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:31,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1049160274, now seen corresponding path program 2 times [2024-06-28 02:04:31,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:31,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914588187] [2024-06-28 02:04:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:31,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:33,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:33,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914588187] [2024-06-28 02:04:33,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914588187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:33,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:33,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:33,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141351555] [2024-06-28 02:04:33,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:33,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:33,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:33,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:33,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:33,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 346 transitions, 4385 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:33,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:33,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:33,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:37,120 INFO L124 PetriNetUnfolderBase]: 8765/13339 cut-off events. [2024-06-28 02:04:37,120 INFO L125 PetriNetUnfolderBase]: For 379890/379890 co-relation queries the response was YES. [2024-06-28 02:04:37,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80586 conditions, 13339 events. 8765/13339 cut-off events. For 379890/379890 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 83840 event pairs, 1965 based on Foata normal form. 2/13339 useless extension candidates. Maximal degree in co-relation 80481. Up to 12124 conditions per place. [2024-06-28 02:04:37,258 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 354 selfloop transitions, 54 changer transitions 0/415 dead transitions. [2024-06-28 02:04:37,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 415 transitions, 5855 flow [2024-06-28 02:04:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:04:37,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-28 02:04:37,263 INFO L175 Difference]: Start difference. First operand has 213 places, 346 transitions, 4385 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:04:37,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 415 transitions, 5855 flow [2024-06-28 02:04:38,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 415 transitions, 5801 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-28 02:04:38,094 INFO L231 Difference]: Finished difference. Result has 221 places, 360 transitions, 4793 flow [2024-06-28 02:04:38,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4793, PETRI_PLACES=221, PETRI_TRANSITIONS=360} [2024-06-28 02:04:38,095 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-28 02:04:38,095 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 360 transitions, 4793 flow [2024-06-28 02:04:38,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:38,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:38,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:38,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:04:38,096 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:38,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 225536144, now seen corresponding path program 3 times [2024-06-28 02:04:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:38,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134140783] [2024-06-28 02:04:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:38,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:40,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:40,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134140783] [2024-06-28 02:04:40,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134140783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:40,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:40,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:40,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402565493] [2024-06-28 02:04:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:40,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:40,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:40,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:40,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:40,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 360 transitions, 4793 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:40,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:40,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:40,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:43,785 INFO L124 PetriNetUnfolderBase]: 8788/13412 cut-off events. [2024-06-28 02:04:43,785 INFO L125 PetriNetUnfolderBase]: For 393081/393081 co-relation queries the response was YES. [2024-06-28 02:04:43,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81698 conditions, 13412 events. 8788/13412 cut-off events. For 393081/393081 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 84618 event pairs, 2513 based on Foata normal form. 1/13396 useless extension candidates. Maximal degree in co-relation 81589. Up to 10441 conditions per place. [2024-06-28 02:04:43,953 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 320 selfloop transitions, 103 changer transitions 0/430 dead transitions. [2024-06-28 02:04:43,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 430 transitions, 6836 flow [2024-06-28 02:04:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:04:43,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-28 02:04:43,954 INFO L175 Difference]: Start difference. First operand has 221 places, 360 transitions, 4793 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:04:43,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 430 transitions, 6836 flow [2024-06-28 02:04:45,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 430 transitions, 6598 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:45,029 INFO L231 Difference]: Finished difference. Result has 225 places, 366 transitions, 5028 flow [2024-06-28 02:04:45,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5028, PETRI_PLACES=225, PETRI_TRANSITIONS=366} [2024-06-28 02:04:45,029 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 173 predicate places. [2024-06-28 02:04:45,030 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 366 transitions, 5028 flow [2024-06-28 02:04:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:45,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:45,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:45,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:04:45,030 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:45,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1942855274, now seen corresponding path program 4 times [2024-06-28 02:04:45,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:45,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042381490] [2024-06-28 02:04:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:45,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:47,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:47,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042381490] [2024-06-28 02:04:47,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042381490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:47,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:47,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:47,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385671554] [2024-06-28 02:04:47,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:47,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:47,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:47,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 366 transitions, 5028 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:47,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:47,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:47,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:50,751 INFO L124 PetriNetUnfolderBase]: 8775/13402 cut-off events. [2024-06-28 02:04:50,752 INFO L125 PetriNetUnfolderBase]: For 407874/407874 co-relation queries the response was YES. [2024-06-28 02:04:50,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83031 conditions, 13402 events. 8775/13402 cut-off events. For 407874/407874 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 84575 event pairs, 2513 based on Foata normal form. 3/13388 useless extension candidates. Maximal degree in co-relation 82919. Up to 10434 conditions per place. [2024-06-28 02:04:50,925 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 317 selfloop transitions, 99 changer transitions 0/423 dead transitions. [2024-06-28 02:04:50,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 423 transitions, 6663 flow [2024-06-28 02:04:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:04:50,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 02:04:50,927 INFO L175 Difference]: Start difference. First operand has 225 places, 366 transitions, 5028 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:04:50,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 423 transitions, 6663 flow [2024-06-28 02:04:52,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 423 transitions, 6523 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 02:04:52,219 INFO L231 Difference]: Finished difference. Result has 229 places, 366 transitions, 5094 flow [2024-06-28 02:04:52,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5094, PETRI_PLACES=229, PETRI_TRANSITIONS=366} [2024-06-28 02:04:52,220 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 177 predicate places. [2024-06-28 02:04:52,220 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 366 transitions, 5094 flow [2024-06-28 02:04:52,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:52,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:52,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:52,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:04:52,221 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:52,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash -437783408, now seen corresponding path program 5 times [2024-06-28 02:04:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:52,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408422115] [2024-06-28 02:04:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:54,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:54,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408422115] [2024-06-28 02:04:54,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408422115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:54,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:54,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:54,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059327314] [2024-06-28 02:04:54,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:54,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:54,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:54,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:04:54,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 366 transitions, 5094 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:54,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:54,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:04:54,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:58,039 INFO L124 PetriNetUnfolderBase]: 8766/13383 cut-off events. [2024-06-28 02:04:58,039 INFO L125 PetriNetUnfolderBase]: For 413556/413556 co-relation queries the response was YES. [2024-06-28 02:04:58,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82951 conditions, 13383 events. 8766/13383 cut-off events. For 413556/413556 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 84302 event pairs, 1969 based on Foata normal form. 3/13373 useless extension candidates. Maximal degree in co-relation 82838. Up to 11005 conditions per place. [2024-06-28 02:04:58,181 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 318 selfloop transitions, 91 changer transitions 0/416 dead transitions. [2024-06-28 02:04:58,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 416 transitions, 6373 flow [2024-06-28 02:04:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:04:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-28 02:04:58,183 INFO L175 Difference]: Start difference. First operand has 229 places, 366 transitions, 5094 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:04:58,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 416 transitions, 6373 flow [2024-06-28 02:04:59,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 416 transitions, 6049 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-28 02:04:59,128 INFO L231 Difference]: Finished difference. Result has 230 places, 367 transitions, 5017 flow [2024-06-28 02:04:59,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4779, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5017, PETRI_PLACES=230, PETRI_TRANSITIONS=367} [2024-06-28 02:04:59,128 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 178 predicate places. [2024-06-28 02:04:59,128 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 367 transitions, 5017 flow [2024-06-28 02:04:59,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:59,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:59,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:59,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:04:59,133 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:59,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash -359027776, now seen corresponding path program 6 times [2024-06-28 02:04:59,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:59,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308639063] [2024-06-28 02:04:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:01,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:01,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308639063] [2024-06-28 02:05:01,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308639063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:01,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:01,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113126993] [2024-06-28 02:05:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:01,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:01,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:01,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:01,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 367 transitions, 5017 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:01,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:01,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:01,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:04,729 INFO L124 PetriNetUnfolderBase]: 8740/13321 cut-off events. [2024-06-28 02:05:04,729 INFO L125 PetriNetUnfolderBase]: For 406904/406904 co-relation queries the response was YES. [2024-06-28 02:05:04,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81699 conditions, 13321 events. 8740/13321 cut-off events. For 406904/406904 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 83612 event pairs, 1912 based on Foata normal form. 6/13314 useless extension candidates. Maximal degree in co-relation 81586. Up to 10991 conditions per place. [2024-06-28 02:05:04,896 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 326 selfloop transitions, 93 changer transitions 0/426 dead transitions. [2024-06-28 02:05:04,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 426 transitions, 6323 flow [2024-06-28 02:05:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:05:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:05:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-28 02:05:04,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-28 02:05:04,898 INFO L175 Difference]: Start difference. First operand has 230 places, 367 transitions, 5017 flow. Second operand 9 states and 226 transitions. [2024-06-28 02:05:04,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 426 transitions, 6323 flow [2024-06-28 02:05:06,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 426 transitions, 6018 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:06,716 INFO L231 Difference]: Finished difference. Result has 234 places, 367 transitions, 4911 flow [2024-06-28 02:05:06,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4911, PETRI_PLACES=234, PETRI_TRANSITIONS=367} [2024-06-28 02:05:06,716 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-28 02:05:06,716 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 367 transitions, 4911 flow [2024-06-28 02:05:06,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:06,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:06,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:06,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:05:06,717 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:06,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1065085323, now seen corresponding path program 1 times [2024-06-28 02:05:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:06,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014840837] [2024-06-28 02:05:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:06,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:09,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:09,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014840837] [2024-06-28 02:05:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014840837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:09,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822616111] [2024-06-28 02:05:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:09,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:09,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:09,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 367 transitions, 4911 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:09,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:09,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:09,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:12,744 INFO L124 PetriNetUnfolderBase]: 9088/13824 cut-off events. [2024-06-28 02:05:12,745 INFO L125 PetriNetUnfolderBase]: For 440971/440983 co-relation queries the response was YES. [2024-06-28 02:05:12,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84875 conditions, 13824 events. 9088/13824 cut-off events. For 440971/440983 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 87416 event pairs, 2348 based on Foata normal form. 16/13828 useless extension candidates. Maximal degree in co-relation 84761. Up to 10608 conditions per place. [2024-06-28 02:05:12,923 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 331 selfloop transitions, 99 changer transitions 0/437 dead transitions. [2024-06-28 02:05:12,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 437 transitions, 6795 flow [2024-06-28 02:05:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:05:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:05:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 02:05:12,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:05:12,925 INFO L175 Difference]: Start difference. First operand has 234 places, 367 transitions, 4911 flow. Second operand 7 states and 182 transitions. [2024-06-28 02:05:12,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 437 transitions, 6795 flow [2024-06-28 02:05:14,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 437 transitions, 6353 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-28 02:05:14,476 INFO L231 Difference]: Finished difference. Result has 234 places, 378 transitions, 5002 flow [2024-06-28 02:05:14,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5002, PETRI_PLACES=234, PETRI_TRANSITIONS=378} [2024-06-28 02:05:14,476 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-28 02:05:14,476 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 378 transitions, 5002 flow [2024-06-28 02:05:14,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:14,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:14,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:14,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:05:14,477 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:14,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1819342035, now seen corresponding path program 2 times [2024-06-28 02:05:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461420294] [2024-06-28 02:05:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:17,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461420294] [2024-06-28 02:05:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461420294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:17,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:17,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247954747] [2024-06-28 02:05:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:17,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:17,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:17,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:17,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 378 transitions, 5002 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:17,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:17,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:17,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:21,353 INFO L124 PetriNetUnfolderBase]: 9350/14260 cut-off events. [2024-06-28 02:05:21,354 INFO L125 PetriNetUnfolderBase]: For 456410/456410 co-relation queries the response was YES. [2024-06-28 02:05:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88574 conditions, 14260 events. 9350/14260 cut-off events. For 456410/456410 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 90610 event pairs, 2570 based on Foata normal form. 8/14251 useless extension candidates. Maximal degree in co-relation 88458. Up to 10758 conditions per place. [2024-06-28 02:05:21,506 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 330 selfloop transitions, 119 changer transitions 0/456 dead transitions. [2024-06-28 02:05:21,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 456 transitions, 6931 flow [2024-06-28 02:05:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:05:21,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-28 02:05:21,508 INFO L175 Difference]: Start difference. First operand has 234 places, 378 transitions, 5002 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:05:21,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 456 transitions, 6931 flow [2024-06-28 02:05:22,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 456 transitions, 6787 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 02:05:22,717 INFO L231 Difference]: Finished difference. Result has 241 places, 391 transitions, 5437 flow [2024-06-28 02:05:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5437, PETRI_PLACES=241, PETRI_TRANSITIONS=391} [2024-06-28 02:05:22,718 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 189 predicate places. [2024-06-28 02:05:22,718 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 391 transitions, 5437 flow [2024-06-28 02:05:22,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:22,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:22,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:05:22,719 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:22,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2065618007, now seen corresponding path program 3 times [2024-06-28 02:05:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419688495] [2024-06-28 02:05:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:25,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419688495] [2024-06-28 02:05:25,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419688495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:25,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:25,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:05:25,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547805386] [2024-06-28 02:05:25,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:25,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:05:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:05:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:05:25,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:25,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 391 transitions, 5437 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:25,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:25,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:25,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:29,482 INFO L124 PetriNetUnfolderBase]: 9326/14224 cut-off events. [2024-06-28 02:05:29,483 INFO L125 PetriNetUnfolderBase]: For 467663/467663 co-relation queries the response was YES. [2024-06-28 02:05:29,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88479 conditions, 14224 events. 9326/14224 cut-off events. For 467663/467663 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 90349 event pairs, 2566 based on Foata normal form. 8/14215 useless extension candidates. Maximal degree in co-relation 88360. Up to 10746 conditions per place. [2024-06-28 02:05:29,652 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 340 selfloop transitions, 126 changer transitions 0/473 dead transitions. [2024-06-28 02:05:29,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 473 transitions, 7260 flow [2024-06-28 02:05:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:05:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:05:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-28 02:05:29,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270833333333333 [2024-06-28 02:05:29,654 INFO L175 Difference]: Start difference. First operand has 241 places, 391 transitions, 5437 flow. Second operand 10 states and 253 transitions. [2024-06-28 02:05:29,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 473 transitions, 7260 flow [2024-06-28 02:05:31,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 473 transitions, 6890 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:31,136 INFO L231 Difference]: Finished difference. Result has 246 places, 393 transitions, 5416 flow [2024-06-28 02:05:31,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5079, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5416, PETRI_PLACES=246, PETRI_TRANSITIONS=393} [2024-06-28 02:05:31,137 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 194 predicate places. [2024-06-28 02:05:31,137 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 393 transitions, 5416 flow [2024-06-28 02:05:31,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:31,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:31,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:31,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:05:31,137 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:31,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1306834725, now seen corresponding path program 4 times [2024-06-28 02:05:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:31,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314216161] [2024-06-28 02:05:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:31,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314216161] [2024-06-28 02:05:33,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314216161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:33,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:33,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:33,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821662363] [2024-06-28 02:05:33,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:33,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:33,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:33,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:33,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 393 transitions, 5416 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:33,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:33,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:33,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:36,802 INFO L124 PetriNetUnfolderBase]: 9618/14623 cut-off events. [2024-06-28 02:05:36,803 INFO L125 PetriNetUnfolderBase]: For 477435/477435 co-relation queries the response was YES. [2024-06-28 02:05:37,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90260 conditions, 14623 events. 9618/14623 cut-off events. For 477435/477435 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 92768 event pairs, 2103 based on Foata normal form. 12/14622 useless extension candidates. Maximal degree in co-relation 90140. Up to 11975 conditions per place. [2024-06-28 02:05:37,308 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 341 selfloop transitions, 100 changer transitions 0/448 dead transitions. [2024-06-28 02:05:37,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 448 transitions, 6719 flow [2024-06-28 02:05:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:05:37,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 02:05:37,310 INFO L175 Difference]: Start difference. First operand has 246 places, 393 transitions, 5416 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:05:37,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 448 transitions, 6719 flow [2024-06-28 02:05:38,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 448 transitions, 6385 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-28 02:05:38,757 INFO L231 Difference]: Finished difference. Result has 246 places, 401 transitions, 5447 flow [2024-06-28 02:05:38,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5090, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5447, PETRI_PLACES=246, PETRI_TRANSITIONS=401} [2024-06-28 02:05:38,758 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 194 predicate places. [2024-06-28 02:05:38,758 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 401 transitions, 5447 flow [2024-06-28 02:05:38,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:38,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:38,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:38,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:05:38,759 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:38,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash 425268307, now seen corresponding path program 5 times [2024-06-28 02:05:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:38,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732841906] [2024-06-28 02:05:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:41,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:41,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732841906] [2024-06-28 02:05:41,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732841906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:41,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:41,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421261646] [2024-06-28 02:05:41,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:41,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:41,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:41,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:41,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 401 transitions, 5447 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:41,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:41,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:41,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:45,069 INFO L124 PetriNetUnfolderBase]: 9582/14593 cut-off events. [2024-06-28 02:05:45,070 INFO L125 PetriNetUnfolderBase]: For 456807/456807 co-relation queries the response was YES. [2024-06-28 02:05:45,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88522 conditions, 14593 events. 9582/14593 cut-off events. For 456807/456807 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 92576 event pairs, 2069 based on Foata normal form. 12/14592 useless extension candidates. Maximal degree in co-relation 88401. Up to 11955 conditions per place. [2024-06-28 02:05:45,242 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 341 selfloop transitions, 109 changer transitions 0/457 dead transitions. [2024-06-28 02:05:45,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 457 transitions, 6662 flow [2024-06-28 02:05:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:05:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:05:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-28 02:05:45,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-28 02:05:45,244 INFO L175 Difference]: Start difference. First operand has 246 places, 401 transitions, 5447 flow. Second operand 9 states and 226 transitions. [2024-06-28 02:05:45,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 457 transitions, 6662 flow [2024-06-28 02:05:46,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 457 transitions, 6362 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:46,448 INFO L231 Difference]: Finished difference. Result has 249 places, 401 transitions, 5379 flow [2024-06-28 02:05:46,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5379, PETRI_PLACES=249, PETRI_TRANSITIONS=401} [2024-06-28 02:05:46,449 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 197 predicate places. [2024-06-28 02:05:46,449 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 401 transitions, 5379 flow [2024-06-28 02:05:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:46,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:46,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:46,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:05:46,450 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:46,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:46,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1954066188, now seen corresponding path program 1 times [2024-06-28 02:05:46,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:46,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180138005] [2024-06-28 02:05:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:48,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:48,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180138005] [2024-06-28 02:05:48,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180138005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:48,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:48,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606226240] [2024-06-28 02:05:48,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:48,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:48,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:48,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 401 transitions, 5379 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:48,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:48,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:48,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:52,670 INFO L124 PetriNetUnfolderBase]: 9980/15242 cut-off events. [2024-06-28 02:05:52,670 INFO L125 PetriNetUnfolderBase]: For 477005/477009 co-relation queries the response was YES. [2024-06-28 02:05:52,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93053 conditions, 15242 events. 9980/15242 cut-off events. For 477005/477009 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 98129 event pairs, 2579 based on Foata normal form. 6/15243 useless extension candidates. Maximal degree in co-relation 92931. Up to 11208 conditions per place. [2024-06-28 02:05:52,881 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 330 selfloop transitions, 149 changer transitions 0/486 dead transitions. [2024-06-28 02:05:52,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 486 transitions, 7494 flow [2024-06-28 02:05:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:05:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:05:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-28 02:05:52,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-28 02:05:52,883 INFO L175 Difference]: Start difference. First operand has 249 places, 401 transitions, 5379 flow. Second operand 7 states and 191 transitions. [2024-06-28 02:05:52,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 486 transitions, 7494 flow [2024-06-28 02:05:54,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 486 transitions, 7218 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 02:05:54,190 INFO L231 Difference]: Finished difference. Result has 249 places, 417 transitions, 5754 flow [2024-06-28 02:05:54,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5134, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5754, PETRI_PLACES=249, PETRI_TRANSITIONS=417} [2024-06-28 02:05:54,190 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 197 predicate places. [2024-06-28 02:05:54,191 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 417 transitions, 5754 flow [2024-06-28 02:05:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:54,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:54,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:54,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:05:54,191 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:54,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1658640632, now seen corresponding path program 2 times [2024-06-28 02:05:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:54,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719692873] [2024-06-28 02:05:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:56,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719692873] [2024-06-28 02:05:56,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719692873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:56,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:56,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038025883] [2024-06-28 02:05:56,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:56,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:56,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:05:56,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 417 transitions, 5754 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:56,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:56,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:05:56,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:00,841 INFO L124 PetriNetUnfolderBase]: 10026/15309 cut-off events. [2024-06-28 02:06:00,841 INFO L125 PetriNetUnfolderBase]: For 491877/491877 co-relation queries the response was YES. [2024-06-28 02:06:00,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94775 conditions, 15309 events. 10026/15309 cut-off events. For 491877/491877 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 98514 event pairs, 2594 based on Foata normal form. 2/15306 useless extension candidates. Maximal degree in co-relation 94651. Up to 11232 conditions per place. [2024-06-28 02:06:01,033 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 335 selfloop transitions, 150 changer transitions 0/492 dead transitions. [2024-06-28 02:06:01,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 492 transitions, 7477 flow [2024-06-28 02:06:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 02:06:01,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-28 02:06:01,035 INFO L175 Difference]: Start difference. First operand has 249 places, 417 transitions, 5754 flow. Second operand 8 states and 210 transitions. [2024-06-28 02:06:01,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 492 transitions, 7477 flow [2024-06-28 02:06:03,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 492 transitions, 7367 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 02:06:03,245 INFO L231 Difference]: Finished difference. Result has 255 places, 421 transitions, 6043 flow [2024-06-28 02:06:03,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6043, PETRI_PLACES=255, PETRI_TRANSITIONS=421} [2024-06-28 02:06:03,245 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 203 predicate places. [2024-06-28 02:06:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 421 transitions, 6043 flow [2024-06-28 02:06:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:03,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:03,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:06:03,246 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:03,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1955956990, now seen corresponding path program 3 times [2024-06-28 02:06:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:03,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370422202] [2024-06-28 02:06:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:03,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:05,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:05,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370422202] [2024-06-28 02:06:05,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370422202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:05,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:05,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:05,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633147441] [2024-06-28 02:06:05,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:05,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:05,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:05,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:05,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:05,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:06:05,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 421 transitions, 6043 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:05,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:05,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:06:05,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:10,152 INFO L124 PetriNetUnfolderBase]: 10014/15234 cut-off events. [2024-06-28 02:06:10,152 INFO L125 PetriNetUnfolderBase]: For 506746/506746 co-relation queries the response was YES. [2024-06-28 02:06:10,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95251 conditions, 15234 events. 10014/15234 cut-off events. For 506746/506746 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 97302 event pairs, 2277 based on Foata normal form. 4/15236 useless extension candidates. Maximal degree in co-relation 95125. Up to 13823 conditions per place. [2024-06-28 02:06:10,339 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 412 selfloop transitions, 54 changer transitions 0/473 dead transitions. [2024-06-28 02:06:10,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 473 transitions, 7187 flow [2024-06-28 02:06:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-28 02:06:10,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-28 02:06:10,341 INFO L175 Difference]: Start difference. First operand has 255 places, 421 transitions, 6043 flow. Second operand 8 states and 201 transitions. [2024-06-28 02:06:10,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 473 transitions, 7187 flow [2024-06-28 02:06:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 473 transitions, 6795 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 02:06:12,021 INFO L231 Difference]: Finished difference. Result has 257 places, 421 transitions, 5772 flow [2024-06-28 02:06:12,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5772, PETRI_PLACES=257, PETRI_TRANSITIONS=421} [2024-06-28 02:06:12,022 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2024-06-28 02:06:12,022 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 421 transitions, 5772 flow [2024-06-28 02:06:12,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:12,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:06:12,023 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:12,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1354485900, now seen corresponding path program 4 times [2024-06-28 02:06:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:12,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135135535] [2024-06-28 02:06:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:14,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135135535] [2024-06-28 02:06:14,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135135535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:14,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:14,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:14,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768955760] [2024-06-28 02:06:14,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:14,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:14,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:14,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:14,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:06:14,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 421 transitions, 5772 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:14,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:14,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:06:14,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:18,972 INFO L124 PetriNetUnfolderBase]: 10060/15301 cut-off events. [2024-06-28 02:06:18,972 INFO L125 PetriNetUnfolderBase]: For 507269/507281 co-relation queries the response was YES. [2024-06-28 02:06:19,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93795 conditions, 15301 events. 10060/15301 cut-off events. For 507269/507281 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 97892 event pairs, 2458 based on Foata normal form. 10/15299 useless extension candidates. Maximal degree in co-relation 93668. Up to 11245 conditions per place. [2024-06-28 02:06:19,172 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 349 selfloop transitions, 134 changer transitions 0/490 dead transitions. [2024-06-28 02:06:19,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 490 transitions, 7651 flow [2024-06-28 02:06:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:06:19,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 02:06:19,174 INFO L175 Difference]: Start difference. First operand has 257 places, 421 transitions, 5772 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:06:19,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 490 transitions, 7651 flow [2024-06-28 02:06:20,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 490 transitions, 7537 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:06:20,877 INFO L231 Difference]: Finished difference. Result has 257 places, 424 transitions, 5984 flow [2024-06-28 02:06:20,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5984, PETRI_PLACES=257, PETRI_TRANSITIONS=424} [2024-06-28 02:06:20,877 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2024-06-28 02:06:20,877 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 424 transitions, 5984 flow [2024-06-28 02:06:20,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:20,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:20,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:20,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:06:20,878 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:20,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash 99588370, now seen corresponding path program 5 times [2024-06-28 02:06:20,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:20,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248714636] [2024-06-28 02:06:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:23,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:23,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248714636] [2024-06-28 02:06:23,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248714636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:23,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:23,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:23,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987562888] [2024-06-28 02:06:23,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:23,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:23,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:23,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:06:23,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 424 transitions, 5984 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:23,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:23,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:06:23,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:27,815 INFO L124 PetriNetUnfolderBase]: 10034/15276 cut-off events. [2024-06-28 02:06:27,815 INFO L125 PetriNetUnfolderBase]: For 524813/524825 co-relation queries the response was YES. [2024-06-28 02:06:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95217 conditions, 15276 events. 10034/15276 cut-off events. For 524813/524825 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 97807 event pairs, 2492 based on Foata normal form. 14/15278 useless extension candidates. Maximal degree in co-relation 95089. Up to 11226 conditions per place. [2024-06-28 02:06:27,997 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 348 selfloop transitions, 127 changer transitions 0/482 dead transitions. [2024-06-28 02:06:27,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 482 transitions, 7510 flow [2024-06-28 02:06:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:06:27,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-28 02:06:27,999 INFO L175 Difference]: Start difference. First operand has 257 places, 424 transitions, 5984 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:06:27,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 482 transitions, 7510 flow